JPS63141723A - Assembling member - Google Patents

Abstract

PURPOSE:To make an assembling force stronger and to make air-tightness higher, by melting the surface of an assembling piece of a member by means of ultrasonic wave, bonding tightly it in an assembling cavity of a main body and joining with a projection for joining. CONSTITUTION:When a main body 1 is assembled with a member 2, an assembling piece 5 of the member 2 whose m.p. is lower than that of the main body 1 is melted by means of ultrasonic wave. The molten surface is deformed along the shape of an assembling cavity 3 by inserting deeply it into the assembling cavity 3 and eventually bonded with the assembling cavity 3. When the surface of the assembling piece 5 is solidified, it is thereby tightly bonded with the assembling cavity and joined with a projection 4 for joining to tightly assemble them without coming out.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for assembling a main body and a synthetic resin member that exhibits strong assembly force and high airtightness.

[Conventional technology]

BACKGROUND ART Conventionally, there are various methods for assembling two bodies and members to be assembled to each other in various products such as containers, depending on their uses. For example, before assembling the two parts, a protrusion or an undercut may be formed on each part to engage them, or the two parts may be fitted and welded together.

The liquid cosmetics storage container shown in FIG. 4 is based on the technology previously filed by the applicant (Utility Application No. 59-80240), and also includes a combination of the main body 1 and the member 2. A method is shown.

In this container, the assembly between the main body 1 and the member 2 is particularly important for its functionality, and the assembly between the two must be strong (and have excellent airtightness). When the member 2 made of synthetic resin material is pressed, the pressure causes the liquid inside the pressure chamber 12 to pass through the pipe 11, open the first check valve 9, and pour out onto the top wall 8. When it stops, the first check valve 9 is closed and the member 2 is elastically returned by the suction force at that time.

The second check valve 10 opens and the liquid inside the container is sucked into the pressure chamber 12. Then, when 1 member 2 is pressed.

The second check valve 10 is closed by the pressure, and the liquid inside the pressure chamber 12 is poured out onto the top wall 8 through the first check valve 9 as described above.

Therefore, in order to effectively achieve these effects, it is necessary to
The assembly between the member 2 and the main body 1 to which it is assembled is strong;
It also needs to have excellent airtightness.

This prior art takes this point into consideration.

A ring packing 7 is fitted to the part where the member 2 and the main body 1 are assembled to make the assembly of the two parts strong.

Improves airtightness.

[Problem that the invention attempts to solve]

However, these conventional assembly methods particularly require strong assembly and high airtightness as described above.

Also, in cases where the member is more elastic and softer than the main body, it is not appropriate, and there is room for improvement.

The present invention was devised in view of these points.

It is an object of the present invention to provide a method of assembling a main body and a member that is strong and has excellent airtightness.

[Means to solve the problem]

Therefore, when assembling the synthetic resin member 2 having a lower melting point than the main body 1 to the main body 1, the recess 3 is formed when the main body 1 is assembled with the locking protrusion 4 protruding from the side surface.

The assembly is performed by inserting the assembly piece 5 of the member 2 into the recess 3, and at least the surface portion of the assembly piece 5 is assembled into the recess 3.
Assemble the two by ultrasonic melting until they are in close contact with each other.

[Effect]

When assembling the main body 1 and the member 2 by the method described above, the assembled piece 5 of the member 2 having a lower melting point than the main body 1 is heated by ultrasonic waves.
The surface part of is melted. and.

When the assembly is inserted deeply into the recess 3, the molten surface portion deforms along the shape of the recess 3, and finally the assembly comes into close contact with the recess 3. As a result, when the surface portion of the piece 5 with the second set is solidified, the first set is in close contact with the fourth part 3.

By engaging with the locking protrusion 4, it is strongly assembled and cannot be removed.

〔Example〕

FIGS. 1 and 2 show an embodiment of the present invention. This shows a storage container shown in the prior art, in which the synthetic resin main body 1 and the member 2 are assembled by the method of the present invention.

In this embodiment, the recess 3 for the two assemblies is formed into a groove, and a vertical protrusion 6 is provided on the bottom surface of the recess 3. The diameter of the assembly piece 5 is set to be smaller than the diameter of the recess 3 for one assembly, and the bottom part is expanded outward by the upright protrusion 6 after being inserted so that it comes into close contact with the side surface of the recess 3 for assembly.

In this case, the volume of the piece 5 with nine sets is set to be approximately the same as the volume of the recess 3.

In addition, in the first assembly, the recess 3 is not limited to a groove, but also includes a hole.

Furthermore, the shape of the locking protrusion 4 is not limited (see the third example).
As shown in the figure, the locking protrusion 4 can be installed at the upper end of the side surface of the recess 3 in a tapered shape that expands downward. The point is 2
It is necessary to have a structure that tightly engages with the assembly piece 5 and does not come out.

For this type of container, the method of the present invention is most suitable because, as described above, strength and airtightness are particularly required for the assembly of the member 2 and the main body 1. but.

The assembly method according to the present invention is not limited to use with this type of container, but can be used to assemble the main body 1 and the member 2 in any product.

[Effect of idea]

In this way, the present invention is assembled into the main body by melting the surface portion of the member assembly piece into the recess using ultrasonic waves and making it adhere tightly, and also engaging the locking protrusion to strengthen the assembly force and improve airtightness. It is something. Therefore, the method of the present invention is superior in terms of both assembly force and airtightness to conventional assembly methods, such as engagement using simple protrusions or engagement using undercuts.
Also, unlike the method of melting and welding both the main body and the assembly piece, there is no need to melt the single main body, and only the parts with low melting points need to be melted, so it has the excellent effect of achieving high efficiency in one operation. It is something to do.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing one embodiment, FIG. 2 is an enlarged view of the main part thereof, and FIG. 3 is a sectional view showing another embodiment. FIG. 4 is a sectional view showing a conventional example. Explanation of symbols: 2: Main body, 2: Member, 3: Recessed part for assembly. 4: Locking protrusion, 5: Assembly piece, 6: Standing protrusion. 7: Ring patchkin, 8: Top wall. 9: first check valve, 10: second check valve. 11: Pipe, 12: Pressure chamber. Ziro 4 Muku 1-#4 2---Ra iβj2 3-: Ri 1 Iri 1 Pl upper Clary β 4-Moan Chi d beg 3 Gome 1 Shi 5- Kay f? gravel

Claims (1)

[Claims] A method of assembling a member (2) made of synthetic resin with a lower melting point than the main body (1) to the main body (1), in which a locking protrusion (4) is provided protruding from the side surface of the main body (1). A recess (3) is formed, and the assembly piece (5) of the member (2) is inserted into the assembly recess (3), and at least the assembly piece (5) is inserted into the assembly recess (3).
) is ultrasonically melted until the surface portion of the part (3) comes into close contact with the assembly recess (3).