JP2000334370A - Valved applicator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance the efficiency of valve opening length by projecting the front part of the valve member of the valve mechanism interposed between a housing part and a coating tip into the coating tip in a bending deformable manner and forming a projection to the inner surface of the coating tip in opposed relationship so as to be capable of bringing the same into contact with the front part of the valve member and specifying the max. projection length thereof. SOLUTION: In an applicator for applying a liquid coating agent such as paint or pigment, a front shaft 2 is attached to the front of a container main body 1 and a coating tip is attached to this front shaft 2. A valve member is arranged over the range from the center part of the front end of the coating piece 3a of the coating tip to the rear end of the hollow part 2a of the front shaft 2 through an opening part. A bending deformable plate part 4a is provided to the front end of the valve member and a valve part 4a is provided to the rear end to the plate part 4a. Two inwardly protruding projections 3d are provided to the front end of the inner surface of a coating row on the center side of the coating piece 3a so as to become point symmetric arrangement at the center but the max. protruding length of the projections 3d is set so as to become larger than 1/2 of the distance between the inner walls of the coating tip having the projections 3d formed thereto.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an application having a valve function for applying a liquid or powder coating agent such as a paint, a paint, an ink, a correction liquid, a paste, a cosmetic, a drug, a repair agent, and a coating agent. About the tool.

[0002]

2. Description of the Related Art A valve is provided in which a deformable coating destination is mounted in front of an opening of a container body provided with a coating liquid storage chamber, and a valve mechanism is arranged between the coating liquid storage chamber and the coating destination. As a coating applicator, Japanese Utility Model Publication No. 42-13671 discloses
A flange 1a is formed on the upper side, and a valve rod 3 integral with a conical valve seat 3a is protruded from a valve hole 2 drilled in the center. 3a 'is fixed to the lower surface of 3a, and the inner lid 1 in which the valve seat is pressed against the valve hole 2 is inserted into the mouth of the container body 8 and the thick sponge rubber body 7 is placed on the receiving plate 5a from above. The outer lid 5 with the adhesive 7 'is attached to the valve stem 3
Discloses a device in which a coating liquid container formed by passing through a valve hole 6 at the center of a receiving plate and inserted into a sponge rubber body and further capping with a cap 10 is a gist. At the time of application, the liquid container for application described above has a stiff tip of the valve stem in the sponge rubber body to which the application is applied, so that the feeling of pushing the valve stem is transmitted, and the feeling becomes rough, and it is intended to obtain a smooth feeling. It is difficult, and when the valve is opened, the valve rod is pressed obliquely backward, and the valve rod moves while being in contact with other members. Therefore, the valve rod resists the sum of the urging force on the valve rod and the contact resistance load. As a result, the valve is opened, and the load for opening the valve is increased.

[0003] In order to solve this problem, the present applicant has
A valve-equipped applicator in which a deformable application destination is attached to the front of the opening of the container body provided with the application liquid storage chamber, and a valve mechanism is arranged between the application liquid storage chamber and the application destination. The valve mechanism comprises a valve seat portion and a valve member urged forward so as to be pressed against the valve seat portion. The present invention proposes a gist of a valve-equipped applicator characterized by projecting in the direction (Japanese Patent Application No. 9-316253).
issue).

[0004]

SUMMARY OF THE INVENTION The present invention is to further improve the above-mentioned Japanese Patent Application No. 9-316253. That is,
The applicator with valve described in Japanese Patent Application No. 9-316253 requires improvement in the following points. (1) The higher the viscosity of the built-in coating agent, the larger the valve opening space amount of the valve mechanism, that is, the longer the valve opening distance, in order to secure an appropriate discharge amount of the coating agent. In order to achieve this, it is necessary to increase the valve opening length efficiency. (2) It is necessary to shorten the valve opening time of the valve mechanism so that the built-in coating agent can be discharged in a short time. To this end, it is necessary to open the valve simultaneously with the deformation of the coating destination. A quick response of the valve opening operation is required. The present invention
An object of the present invention is to provide a valve-equipped applicator capable of improving the valve opening length efficiency and improving the responsiveness of a valve opening operation.

[0005]

SUMMARY OF THE INVENTION According to the present invention, a flexible and deformable application destination is mounted in front of an opening of a container having an application agent storage therein, and a valve mechanism is provided between the storage and the application destination. In the valve-equipped applicator, the valve mechanism comprises a valve seat, and a valve member urged forward so as to press against the valve seat, and a front portion of the valve member. Bendable and project into the application destination, and a projection is formed on the inner surface of the application destination so as to be able to contact the front part of the valve member, and the maximum projection length of this projection is The present invention provides a valve-equipped applicator characterized in that the applicator is provided with a distance larger than 1/2 of the distance between the inner walls of the application destination where the projections are formed.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in more detail with reference to the accompanying drawings. 1 to 5 show a first embodiment. 1 is a sectional view of a main part, FIG. 2 is a side view of FIG. 1, FIG. 3 is a top view of FIG.
FIG. 5 is an enlarged view of a central portion of FIG. 3, and FIG. 5 is an explanatory view of a coating state of the first embodiment. Reference numeral 1 in FIG. 1 is a container.
The container 1 is provided with a storage portion 1a for storing a coating agent having an elliptical cross section at the rear, and a cylindrical portion 1b at the front with an open front end and a male screw portion disposed around the storage portion 1a.

A front shaft 2 having a substantially cylindrical shape and penetrating therethrough is attached to the front of the container body 1 by screwing. At the rear from the front-rear intermediate position on the inner side of the front shaft 2, there is provided a tubular middle tubular portion 2a inserted into the inner surface of the opening of the container body 1. This middle cylinder part 2a
A cylindrical outer cylinder portion 2b is provided on the outer circumference of the container body 1, and a female screw portion to be screwed with the male screw portion of the cylindrical portion 1a of the container body 1 is provided on the inner peripheral surface of the outer cylinder portion 2b. A little backward from the front end of the front shaft 2,
An outer step 2d is provided at an intermediate position in the front and rear direction of the outer periphery. The rear end of the middle shaft portion 2a of the front shaft 2 is
It extends slightly rearward from the rear end of the outer cylinder portion 2b. this is,
When the front shaft is screw-assembled with the male screw of the cylindrical portion of the container, the rear end of the middle cylindrical portion of the front shaft is intended to facilitate the initial insertion into the inner surface of the opening of the cylindrical portion of the container. Further, two notches are provided at the rear end of the middle cylindrical portion 2a of the front shaft 2. this is,
Positioning in the cross-section circumferential direction (=
(Prevention of rotation of the valve member). But,
Furthermore, if this notch is secured to a width of 1 mm or more and a height of 1 mm or more, on a parts feeder machine for assembling with an automatic assembling machine, the front shaft is aligned at a fixed position in the circumferential direction. It can also be applied as a notch, which is a light transmitting portion for detecting the position of a laser beam.

An application point 3 is attached to the front shaft 2 and projects forward from the inside and is flat at the front and cylindrical at the rear and communicates back and forth. The application destination 3 is formed of an application portion on which a large number of application pieces 3a that can bend and deform and have a substantially semicircular cross section are formed, and an outer cylindrical portion 3b that follows the application portion. The coating section has a coating row 3c having a substantially semicircular cross-section with a circular outer side and a flat inner side, and a large number of coating pieces 3a tapered from the rear to the front arranged in a row in the horizontal direction. It is formed in such a manner that a large number of them are superimposed and the tips of the inner rows protrude from the outer rows. Here, the shape of the coating piece 3a is not, for example, a flat coating piece, but is a substantially semicircle in which the outer side is circular and the inner side is flat in cross section.
This is because the state of contact with the surface to be coated such as a paper surface is a line contact state, so that the coating resistance during coating can be further reduced. The reason why the shape of the coating piece 3a is tapered from the rear to the front is that when the coating destination is molded by the injection molding method, the coating piece in the form of a flake filled with a resin in the mold is stretched. In order to prevent deformation, twist deformation, breakage, and the like, it is easy to take out from the mold (= improve the releasability). Furthermore, by making the application piece tapered, the gap between the application pieces is wide at the front and narrow at the rear, so that the coating agent can be easily guided to the front of the application destination, and to the outside at the rear of the application destination. It is also possible to suppress the bleeding of the coating agent (the more the viscosity of the liquid is increased by using an aqueous synthetic paste as the coating agent, the more the liquid bleeding phenomenon at the rear of the coated piece becomes more remarkable).

The coating pieces 3a arranged on the left and right ends of the outer coating row 3c are slightly shifted inward when viewed from above. This is because the gap between the inner side surface of the coating piece and the outer side surface of the coating piece in the adjacent center side coating row is narrowed only at the left and right ends, so that the coating material protrudes outward from the left and right sides of the coating destination. Can be suppressed. In addition, by disposing the coating pieces on the left and right ends of the outer coating row slightly inward when viewed from above, the coating destination repeatedly contacts the surface to be coated, such as paper, until the coating agent built into the coating tool is consumed. When letting
There is a deformation phenomenon in which the applied piece spreads slightly outward, and such a deformation phenomenon tends to be more remarkable in the application pieces on the left and right end sides of the outer coating row, and consideration was also given to making this deformation phenomenon inconspicuous. . One piece arranged at one end of the application row 3c on the center side is wider and thinner when viewed from above than other application pieces in the same row. This is because, when viewed from the top, one piece of one end of the center side application row is wider and thinner than the other application pieces in the same row.
The flexure at the time of application is made equal (the plate thickness to the width is proportional to the cube of the width in the flexural load calculation formula of the cantilever). Further, by making one piece of one end of the center side application row wider and thinner than the other application pieces in the same row as viewed from the top, rather than dividing the wide portion of the same piece into two parts by the injection molding method. It is also possible to prevent the resin filling in the mold from being unfilled during molding. (As a measure of the difficulty of resin filling in the mold, the resin flow value limit, which is the length divided by the cross-sectional area, has been studied. The lower the value, the easier the resin is filled into the mold.)

Further, at the front end of the inner surface of the coating line 3c on the center side, there are provided two projections 3d each having a substantially right-angled triangular shape and a rounded apex as viewed from the upper surface projecting inward, and having a point-symmetric arrangement at the center. Is provided. On the left and right sides of the application piece 3a, there are provided plate-like side plate portions 3e for suppressing the left and right sides of the application agent from protruding. A through hole is formed inside the application destination 3. The through-hole is provided with an opening 3f having a rectangular cross section formed from the rear end of the application piece 3a toward the rear, and a cylindrical middle cylinder 3g is provided behind the opening 3f. The rear end of the inner surface of 3g forms a valve seat 3h of the valve mechanism. The outside of the coating destination 3 expands rearward from the rear end of the coating piece 3a in a hem-spreading manner, and a maximum diameter portion is provided as a flange 3i.
It comes into contact with the leading end 2 c of the front shaft 2.

A valve member 4 having a valve function and a resilient function is arranged from the center of the front end of the application piece 3a of the application destination 3 through the opening 3f to the rear end of the middle cylindrical portion 2a of the front shaft 2. I have. The front end of the valve member 4 is provided with a flexibly deformable plate portion 4a.
The plate portion 4a has a rectangular cross section, and is provided such that the front end is located immediately behind the projection 3d of the coating destination 3, and the rear portion thereof is the coating destination 3 opening 3f. Is provided to pass through. At the rear end of the plate portion 4a, a valve portion 4b having a hemispherical front is provided. Behind this valve part 4b,
Four resilient portions 4c each having a substantially semicircular longitudinal section and a spiral shape as a whole.
Are continuously provided so as not to contact the inner surface of the coating destination 3 cylindrical portion 3b and the inner surface of the front shaft 2 middle cylindrical portion 2a. A cylindrical tube portion 4d is provided rearward from the rear end of the repelling portion 4c. This cylindrical part 4d
Is provided so as to be fitted behind the front cylindrical portion 2a of the middle cylindrical portion 2a. The valve member 4 is fixed to the middle cylinder portion 2a of the front shaft 2 by a rear cylinder portion 4d, and the valve portion 4b urged in the application destination 3 direction by the resilient portion 4c is connected to the valve seat portion 3h of the application destination 3. The valve mechanism is formed by pressure contact with the circumferential line.

Reference numeral 5 denotes a substantially cylindrical, bottomed cap with an open rear, and the rear end of the cap is an outer step portion 2d of the front shaft 2.
Is in contact with The cap 5 protects and seals the application destination 3 from the outside, and is detachable from the front shaft 2.

The operation and effect of the first embodiment will be described with reference to FIG. Reference numeral 6 denotes an application surface such as a paper surface. At the time of application, when the application piece of the application destination is pressed against the surface to be applied, the application piece bends and deforms in a curved manner because it can be deformed. At the same time, the plate portion of the valve member protruding between the rows of the coating pieces is also bent and deformed because it can be deformed. At this time, the front end of the plate portion of the valve member is locked and abutted on the rear surface of the projection on the front side of the application piece pressed against the surface to be coated, and the front end of the plate portion is prevented from shifting forward. For this reason, the force of the plate portion bending to return to the original shape acts against the repelling portion behind the valve portion, the valve portion of the valve member separates from the valve seat portion to which the coating is applied, the valve opens, and the container body is opened. Is supplied to the application piece at the application destination. For the degree of deflection between the coated piece and the plate, if the coated piece is larger than the plate, the chord length of the curve is
The coated piece is smaller than the plate. Then, the dimensional difference of the chord length is a moving distance to the rear of the valve portion, that is, a valve opening length. Therefore, as the difference in the degree of deflection increases, the valve opening length also increases. However, when the plate portion is not bent at all, the rough touch of the plate portion is transmitted by the application operation feeling, which is not preferable. As described above, in the valve-equipped applicator according to the present invention, at the time of application, the application portion of the application destination and the plate portion of the valve member are flexed and deformed. Since the valve is opened by contact with the lock, the opening operation length of the valve can be lengthened efficiently, and the opening operation of the valve responds promptly, so that even if the viscosity of the coating liquid of the coating material increases, an appropriate discharge amount can be secured. In addition, the time required for the coating liquid to pass through the valve opening portion can be shortened. Furthermore, since the projections are provided in a substantially right-angled triangular shape, when the application agent is applied to the surface to be applied, the projections on the side opposite to the application surface of the application destination also contact the application surface, but the contact state is Because of the contact, even with a coating material having a low property (leveling property) that tends to return to a smooth surface after the application of a coating material or the like applied on the slope, it is possible to further reduce the unevenness of the coating mark. The protrusion has a maximum protrusion height (length in a direction perpendicular to the application row as viewed from above) and a maximum protrusion length of the protrusion, which is defined as a distance between the inner walls of the application piece on which the protrusion is formed. Since the distance is set to be longer than の of the distance, locking by the locking portion of the application destination and the plate portion of the valve member can be more reliably performed.

Each member used in the valve-equipped applicator of the present invention is made of a variety of materials, and by adopting an appropriate molding method,
Can be formed. First, the container will be described. For the molding material of the container, low-density polyethylene, high-density polyethylene, polyolefin resin such as polypropylene,
Polyester resins such as polyester and polybutylene terephthalate, and commercially available thermoplastic resins such as PEN, polyamide, polyacrylonitrile, polycarbonate, polyvinyl chloride, polystyrene, polyoxymethylene, and various elastomers are employed. Furthermore, in order to prevent the container from cracking when the product falls, for example, in the case of a polyolefin resin, a material obtained by adding 1% by weight to 20% by weight of a low-density polyethylene, an olefinic elastomer, and an anti-impact breaker to polypropylene is used. . Container molding methods include:
Direct blow molding, injection blow molding, centrifugal blow molding, and the like are employed. The wall surface of the container is formed of a single resin layer, or a method in which a plurality of resins are configured in multiple layers (= multilayer blow molding method) in order to reduce oxidation of a coating agent contained in the container. As an example of the multilayer blow molding method, there is a method in which a polyamide resin layer is used for a central layer, an adhesive resin layer is formed on the front and back surfaces, and a polyolefin resin layer is formed outside the adhesive resin layer. Further, when a high-viscosity water-based synthetic paste is used as a coating agent, the paste time is reduced when the remaining amount of paste is reduced, that is, in order to speed up the transfer of paste in the container, the inner layer material of the multilayer blow molding is used. A method in which a commercially available master batch silicone agent or water repellent is added thereto, or a water repellent film is coated on the inner surface of the container after blow molding is adopted.

Next, the valve member will be described. The mold for molding the valve member employs a split mold structure. The mold combination of the repelling portion is constituted by a two-member cavity mold sandwiching a cylindrical core pin mold. The processing of the resilient portion on the cavity mold is performed by drilling a hole in a state in which the two cavity mold blocks are joined together, and then performing an electric discharge process or the like so as to carve a groove corresponding to the shape of the resilient portion in a female screw shape. . As a general machining method in this electric discharge machining, a method of vertically engraving a screw shape on a cavity type block surface in which a semi-hole having a semicylindrical shape is cut is employed. As a result of such a method, the thread shape of the surface (PL; parting line) in which the processing surfaces of the cavity block are joined to each other is processed in a slightly shifted state. In particular, the steeper the screw angle,
A phenomenon occurs in which the displacement increases. Due to the required load homogeneity, reduced load aging, close contact length of the resilient portion, cross-sectional area of the resilient portion, etc. required for the resilient portion of the valve member, it is preferable that the displacement of the mating surface is smaller, If the various functions of the part are not required extremely, a slight deviation of the thread shape of the mating surface is acceptable. (When the threading EDM method is adopted as another machining method of the electric discharge machining, there is almost no displacement of the mating surface. In addition, the split mold opening structure generally adopts a method of opening right and left. However, if a multi-directional opening type structure such as opening in three directions divided by 120 degrees is adopted, even if the above-mentioned electric discharge machining method is adopted, it is possible to further reduce the deviation of the screw shape of the mold mating surface.) Similar to the resin fluidity of the application piece to be applied, the resin flow value limit based on the deployment length of the resilient portion of the valve member divided by the line cross-sectional area is examined. As the thickness increases, the resin is more easily filled into the mold. still,
When resin shortage occurs (short phenomenon) outside the resin flow value limit, usually a resin filling port (gate) is provided in the cylindrical portion of the valve member, but a gate is also provided at the rear end of the valve portion. Alternatively, a multi-point gate such as a two-point gate may be used.

Next, a method of molding the front shaft, the application destination, the valve member, and the cap and the livelihood material will be described. As a molding method of these members, an injection molding method or the like is employed. As the molding material, a commercially available thermoplastic resin similar to the above-mentioned container and a commercially available thermosetting resin such as melamine, phenol, and urea are used. In addition, prevention of member cracking at the time of product fall, prevention of stress cracking at the joint, reduction of repeated bending damage, softening of material, suppression of creep reduction, improvement of heat and cold resistance, improvement of mold release properties, improvement of resin fluidity in molds For this purpose, a material whose properties are improved by mixing resins of various materials or a modified material to which an impact buffer, a lubricant, a glass fiber, a glass particle, a filler, a release agent and the like are added are employed. As an example, if a commercially available master batched silicone agent is added to the molding material of the application destination / valve member, forgetting to close the cap when using a high-viscosity aqueous synthetic glue for the application agent,
Even if the glue adhering to the periphery of the application destination and the valve mechanism is dried and solidified, the dried film can be easily peeled off. Apart from the virgin material, it can be environmentally friendly = as an effective use of waste materials, recycled materials such as various resins can be used as molding materials for all members including containers.

In the first embodiment, the container has been described by the direct blow molding method or the like. However, the container may be divided into a container main body and a tail plug member, and may be formed by the injection molding method like other members. In addition, the application destination and valve members are used as valve receiving members, ball valve members,
A coil spring member or the like may be configured as a separate member, or a part of the member may be made of a material other than a synthetic resin material such as a metal material or a ceramic material. Further, the present invention can be applied to a valve-applied applicator having a side knock structure or a rear end knock structure other than the tip knock structure of the above embodiment.

FIG. 6 is an enlarged view of a main part of the upper surface of the coating member of the second embodiment. One protrusion 13d is provided on one side and two protrusions are provided on the other side.
In this case, a total of three trapezoids are provided, and the central projection is provided to be larger than the projections at both ends. The actions and effects are
This is substantially the same as the first embodiment, and in addition, it is possible to change the locking state of the flat coating destination on one surface and the other surface by the locking portion of the coating destination and the plate portion of the valve member. Therefore, the discharge amount of the coating material and the timing of opening the valve can be delicately changed on both sides of the coating destination.

FIG. 7 is an enlarged view of a main part of the top surface of the coating member according to the third embodiment. The projections 23d are provided in a substantially semicircular shape having a curved surface on the center side, three in one row and six in total on both sides. The operation and effect are substantially the same as those of the first embodiment. In addition, since the contact state of the protrusions when the coating material is applied to the surface to be applied becomes three point contact states, the leveling property is improved. Even with a lower coating agent, the coating spots on the coating trace can be further reduced.

[0020]

According to the valve-equipped applicator of the present invention, since the opening operation length of the valve can be efficiently lengthened, and the opening operation of the valve responds promptly, even if the viscosity of the coating liquid of the coating agent becomes high, the proper discharge can be performed. This has the advantage that the amount can be secured and the time for the coating liquid to pass through the valve-opening portion can be shortened.

[Brief description of the drawings]

FIG. 1 is a sectional view of a main part of a first embodiment.

FIG. 2 is a side view of FIG.

FIG. 3 is a top view of FIG. 2 excluding a cap 5;

FIG. 4 is an enlarged view of FIG. 3;

FIG. 5 is an explanatory diagram of a coating state according to the first embodiment.

FIG. 6 is an enlarged view of a main part of the second embodiment.

FIG. 7 is an enlarged view of a main part of the third embodiment.

[Explanation of symbols]

 Reference Signs List 1 container 2 front shaft 3 coating destination 3a coating piece 3b outer cylinder 3c coating row 3d projection 13d projection 23d projection 3e side plate 3f opening 3g middle cylinder 3h valve seat 3i flange 4 valve member 4a plate Part 5 Cap

Claims (1)

[Claims] 1. A valve-equipped application wherein a flexible and deformable application destination is mounted in front of an opening of a container having an application agent storage therein, and a valve mechanism is arranged between the storage and the application destination. The valve mechanism comprises a valve seat, and a valve member biased forward to press against the valve seat; and
The front part of the valve member is made to be able to bend and deform so as to protrude into the application destination, and a projection is formed on the inner surface of the application destination so as to be able to contact the front part of the valve member. Wherein the maximum projection length is provided to be greater than 1/2 of the distance between the inner walls of the application destination where the projections are formed.