JP2500191Y2 - Liquid application nozzle - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] This invention applies various liquid agents such as an adhesive, a sizing agent, a sealant, a release agent, and an adhesion promoter stored in a container to a surface to be coated. The present invention relates to a liquid agent application nozzle for.

[Conventional technology]

In order to accurately apply a small amount of liquid in a nozzle for applying a liquid, as shown in Fig. 5, a capillary-shaped nozzle 21 having a tip portion 20 formed extremely thin, or a commercially available metal nozzle as shown in Fig. 6 is used. A nozzle 23 for application having an injection needle 22 is known.

The nozzle 21 heats the central part of the tubular body made of a thermoplastic synthetic resin such as polyethylene or polypropylene, leaving both ends, and stretches it while observing the softened part.
By cutting the thinned and deformed thin tube with a predetermined thickness at the central portion, a large-diameter base end portion 20a that can be attached to the discharge port of the container is left at one end and gradually tapered toward the other end. A capillary nozzle is obtained, and two nozzles are obtained from one tubular body by this method.

Such nozzles are put on sale for sale either by directly mounting them on the container body that contains the liquid agent, or by accommodating them together in an outer case that houses the container body as an attachment.

[Problems to be solved by the device]

Capillary nozzles that can dispense a small amount of liquid are manufactured by a method similar to manual work, as described above, so the finished dimensions are different and the tip is extremely thin. However, it is difficult to obtain a large number of nozzles with the same shape because they tend to curl.

In addition, when applying the liquid agent, it has a drawback that the tip part is shaken and it is difficult to focus on a predetermined part, and the thickness of the tip part is uneven and thin, so that the restoring force is poor, It has a drawback that it is deformed to be useless after being used several times, and its manufacturing is practically close to manual work, so that the manufacturing efficiency is poor and the cost cannot be reduced.

On the other hand, when storing each of the nozzles in an outer case that stores the container body as an attachment separately from the container body,
It is desirable that the nozzles be automatically aligned and fed by a machine, but it is extremely difficult to obtain a nozzle having the same shape with a capillary nozzle using a synthetic resin material. Since it is not possible to handle them and the machine cannot automatically supply them to the outer case, they are put in the outer case one by one when they are packed in the outer case by hand, so a great deal of labor is required for the packaging work. Therefore, there was a limit to improving productivity.

Furthermore, in the case of a capillary nozzle, when the liquid agent solidifies and is blocked in the tubular portion, the liquid agent can be reused by cutting from the solidified portion, but since the nozzle inner diameter is thicker toward the proximal end, the liquid discharge port There is also a problem that the diameter of the nozzle increases and the discharge rate increases.

On the other hand, the injection needle type nozzle has a uniform product, so it can be automatically supplied by a machine.
Since the part that constitutes the liquid discharge part is injection needle-shaped, it is not possible to fit both parts together and to automatically supply them efficiently with a machine, and the nozzle itself is more costly than a nozzle made of synthetic resin. There is a problem that it is not practical due to some problems, and when the liquid agent is solidified and clogged, it is difficult to reuse by cutting like a capillary nozzle, so replace the nozzle or replace it on the outside of the needle. It can be used by removing the solid by melting it by burning it with a flame or by burning it, but it is extremely dangerous when the liquid is flammable, and it cannot be used in places where fire cannot be used. It was

In view of the current situation, the present invention provides a liquid resin coating nozzle that is a synthetic resin nozzle that can be mass-produced and that can reliably coat a small amount of liquid agent and that can be automatically supplied by a machine. The purpose is to do.

[Means for solving the problem]

In order to achieve the above-mentioned object, the liquid agent application nozzle of the present invention has an intermediate portion continuously connected to the tip of a base end portion having an opening for detachably attaching to a liquid discharge port of a container body. A nozzle member is formed by continuously connecting a tip end portion having a liquid discharge port to the tip end of the intermediate portion via a step portion, and an outer circumference of the step portion on the inner peripheral surface of the intermediate portion of the nozzle member on the base end side. It is characterized in that a nozzle body having a reduced-diameter step portion that abuts against the portion is integrally molded by injection molding.

In the nozzle, the material of the nozzle main body may be an appropriate material depending on the type of liquid agent used, etc., but it is preferable to use a thermoplastic synthetic resin that is easy to injection-mold, and particularly an α-cyanoacrylate-based resin. Polyethylene for injection molding is most preferable as the attachment of the adhesive container containing the adhesive because of its high restoring force.

[Action]

The liquid agent coating nozzle according to the present invention has a reduced diameter stepped portion so as to come into contact with the outer peripheral portion of the stepped portion connecting the intermediate portion and the distal end portion to the inner peripheral surface on the base end side of the intermediate portion constituting the nozzle body. Since the nozzles are formed, when the plurality of nozzles are vertically inserted into each other and overlapped with each other, the inner nozzles can be removably fitted to the outer nozzles.

Therefore, the nozzles can be easily and easily separated from each other, so that the nozzles can be easily placed on the automatic packaging line including the automatic feeder.

Further, since the liquid agent coating nozzle of the present invention can be precisely molded by injection molding of synthetic resin, its tip portion is not uniform in thickness and irregular shape like a conventional capillary nozzle, and is uniform. It is possible to obtain a tip portion having a small thickness and less bending, and it is possible to position the spout of the tip of the nozzle at a target coating portion.

〔Example〕

Hereinafter, an embodiment of the nozzle for applying a liquid agent of the present invention will be specifically described with reference to the accompanying drawings.

The example shows a nozzle 1 for applying a liquid agent as an attachment attached to a container body A containing an α-cyanoacrylate adhesive known as an instant adhesive.

The nozzle body constituting this nozzle 1 has a thick base end portion 2 having a right cylindrical shape with an outer peripheral portion and an intermediate portion having a frustoconical outer peripheral portion continuously connected to the base end portion 2 via a step portion 5. A part 3 and an outer peripheral part connected to the intermediate part 3 via a step part 6 are composed of a straight cylindrical or frustoconical tip part 4, which is inert to α-cyanoacrylate adhesives. It is obtained by integrally molding a different thermoplastic synthetic resin such as polyethylene by injection molding.

The inner cylindrical portion of the proximal end portion 2 has a tapered inner peripheral surface 8 which is tapered from the opening 7 toward the distal end and is in close contact with the outer peripheral surface of the liquid discharge nozzle B connected to the container body A. have.

The cylindrical portion of the intermediate portion 3 has a straight cylindrical inner peripheral surface 9 having a constant inner diameter, which communicates with the tapered inner peripheral surface 8 of the base end portion 2, the straight cylindrical inner peripheral surface 9 and the first reduced diameter step portion. A straight cylindrical inner peripheral surface 11 having a constant inner diameter, which communicates with each other through 10, and a tapered inner peripheral surface which communicates with the straight cylindrical inner peripheral surface 11 and which gradually decreases in diameter in a taper direction in a tip direction.
And the tapered inner peripheral surface 12 is substantially inside the step 6 at the tip of the intermediate portion 3 and is located inside the cylinder of the tip 4 through the second reduced diameter step 13. Straight cylindrical pouring hole formed
Communicates with 14. In the figure, 16 is the tapered inner peripheral surface 6
Is an annular groove formed in a portion close to the opening 7.

In the nozzle 1 having such a configuration, the pouring hole 14 of the tip portion 4
The second reduced-diameter step portion 13 that communicates the tapered inner peripheral surface 12 of the distal end portion of the intermediate portion 3 with the α− accommodated in the container body A.
This is for accurately pouring a minute amount of the cyanoacrylate adhesive from the pouring port 15.

The first reduced diameter step portion 10 formed on the base end portion 2 side of the intermediate portion 3.
When the tip portion 4b of the nozzle 1b is inserted into the nozzle 1a when the nozzles are automatically aligned and supplied to the outer case as shown in FIG. 3, the step portion 6b of the nozzle 1b is a reduced diameter step portion of the nozzle 1a.
This is for keeping the nozzle 1b inserted into the nozzle 1a in contact with 10a in a loosely fitted state, and when the reduced diameter stepped portion 10a and stepped portion 6b are similar in shape. The contact state is good and preferable.

When holding the nozzle 1b in a loosely fitted state with respect to the nozzle 1a, it is natural that each nozzle has a smaller inner diameter than the inner diameter of the proximal end portion 2 than that of the middle portion 3. And the length of the tip portion 4 and the outer diameter of the cylinder are smaller than the length of the intermediate portion 3 and the inner diameter of the cylinder.

When the nozzle having such a structure is used, as shown in FIG. 2, the opening 7 formed in the base end portion 2 of the nozzle 1 is fitted into the liquid discharge nozzle B of the container body A to discharge the liquid. Nozzle B
After making the outer peripheral surface and the tapered inner peripheral surface 8 of the base end portion 2 in close contact with each other, pressing the container body A causes the α-cyanoacrylate adhesive contained in the container body A to
It is possible to accurately discharge a small amount from the spout 15 of the tip portion 4 of the nozzle 1.

On the other hand, such a nozzle can be automatically supplied to the outer case together with the container body A as an attachment.

For example, as shown in FIG. 3, a plurality of nozzles 1a, 1b ...
・ Supported vertically in a state of overlapping, the step portion 5a of the outermost nozzle 1a is held by two openable and closable horizontal arms C, C of the automatic feeding device. With C opened (arrow pointing outward), the outer nozzle 1a is released, the outer nozzle 1a is dropped downward exactly as it is, and the horizontal arms C and C in the open state are instantly removed. Back to the closed state (inward arrow) to support the step 5b in the next nozzle 1b, and by repeating these operations, the plurality of nozzles 1a, 1b ... Can be dropped into.

In addition, as shown in FIG. 4, a plurality of nozzles 1a, 1b, ... 1n are aligned vertically in a cylindrical case 24, and the lowermost nozzle 1a is suppressed by a shutter 25 to prevent falling. In addition to preventing it, the side surface of the next nozzle 1b is lightly pressed by the shutter 26, and then the shutter 25 is opened, so that the nozzle 1a can be dropped downward.

Since there are various means for automatically supplying such a liquid coating nozzle to the outer case, the method is not limited to the above embodiment.

In the nozzle body 1 shown in the embodiment, the stepped portion 5 is formed on the outer circumference of the base end portion 2, and the clamp position of the automatic feeder when the nozzles 1 are automatically aligned and fed to the outer case (not shown). However, this step portion 5 is not an essential constituent element of the liquid agent application nozzle of the present invention, and for clamping, for example, a ring-shaped convex edge or concave groove may be formed above the base end portion. It is a thing.

In addition, although the example has been described with reference to the attachment of the container body filled with α-cyanoacrylate which is an instant adhesive as a liquid agent, the type of liquid agent is not limited to the example.

[Effect of device]

The liquid agent application nozzle of the present invention has a base end portion having an opening for detachably mounting to a liquid discharge port of a container body,
A nozzle body is composed of an intermediate portion following the base end portion and a tip portion following the intermediate portion, and a step portion is formed on the outer periphery of the connecting portion between the intermediate portion and the tip portion of the nozzle body. At the same time, since a reduced-diameter step portion that abuts the outer peripheral portion of the step portion is formed on the inner peripheral surface on the base end side of the intermediate portion of the nozzle body, when a plurality of nozzles are fitted in the axial direction, The other nozzle can be held in the one nozzle in a loosely fitted state.

Therefore, many nozzles can be separably aligned and held by holding the first step portion of the nozzle located at the forefront in a state where a plurality of nozzles are fitted with each other by an appropriate means. By incorporating the nozzle of the present invention into the device line, it is possible to automatically supply to the outer case etc. as an attachment of the container body, and it is possible to greatly improve the production efficiency of the liquid agent container.

Moreover, since the liquid agent coating nozzle of this invention can be obtained by injection molding of a synthetic resin material, it is possible to mass-produce nozzles of the same quality, and the tip portion having the liquid discharge port is superior to the conventional nozzle. Since it has a strong restoring force, it can withstand repeated use, and even if the liquid agent is solidified at the tip of the nozzle, it can be used by removing the part with a blade, which has a secondary effect. It has a great practical advantage such that it can be used freely even in a restricted area where fire is limited.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an embodiment of the liquid agent application nozzle of the present invention, FIG. 2 is a side view with a part cutaway showing a state of being mounted on a container body, and FIG. Sectional view showing the engagement state of a plurality of liquid agent application nozzles,
The figure is an explanatory view showing another example of the automatic supply method of the liquid agent coating nozzle of the present invention, FIG. 5 is a partially cutaway side view of the conventional synthetic resin liquid agent coating nozzle, and FIG. 6 is the conventional injection. It is a partially cutaway side view of the needle type liquid coating nozzle. 1,1a, 1b …… Nozzle 2,2a, 2b …… Base end 3,3a, 3b …… Intermediate part 4,4a, 4b …… Tip 5,5a, 5b …… First step 6, 6a, 6b …… Second step 7 …… Opening 10,10a, 10b …… First reduced diameter step 13,13a, 13b …… First reduced step 15 …… Spout

Claims (1)

(57) [Scope of utility model registration request] 1. An intermediate portion is continuously provided to a tip of a base end portion having an opening for detachably attaching to a liquid discharge port of a container body, and a liquid is discharged through a step portion to the tip of the intermediate portion. A nozzle main body having a reduced-diameter step portion that is in contact with an outer peripheral portion of the step portion is formed on the inner peripheral surface of the intermediate portion of the nozzle member on the base end side, which is formed by continuously connecting the tip portions having the outlets. A liquid agent application nozzle characterized by being integrally molded by injection molding.