JPS598078Y2 - Pressure-resistant small container - Google Patents

Description

[Detailed description of the invention] This invention relates to a pressure-resistant small container made of a thin metal plate with a thickness of about 0.5 mm and having an internal pressure of 10 kg/cm2 and a capacity of about 101. The aim is to mass-produce small containers suitable for storing and transporting gases at low cost.

In general, pressure-resistant small containers made of thin metal plates are made by joining a head plate to the open end of a cup-shaped body that has been press-shaped, or by joining the open ends of two cup-shaped bodies, and the joining is mainly done by rolling. It is usually done by means such as tightening, welding, brazing, etc. However, when tightening by seaming, strength is required to cope with the complex stress applied to the seamed part and its vicinity. Therefore, it is difficult to avoid using a material metal plate that is thicker than necessary, which inevitably increases costs.Also, when welding or brazing, it is difficult to weld thin metal plates due to the technical difficulties of welding thin metal plates. The plate thickness that can be used is limited to relatively thick plates, and there are drawbacks such as reduced strength at welded parts and unsuitability for mass production.

This project eliminates these drawbacks and makes it possible to easily and quickly produce lightweight and strong small containers.Explaining the embodiment with reference to the drawings, 1 and 1 have open ends 2 and 2 with the same inner diameter. A cup-shaped piece made of a thin metal plate in the shape of a cylinder with a bottom, and one end of each joining ring 3 is fitted to the inner periphery of the open end portions 2, 2 of the cup-shaped pieces 1, 1. After that, the open ends 2, 2 of the cup-shaped pieces 1, 1 are abutted, and the abutting ends, the cup-shaped pieces 1, 1, and the joining ring 3 are bonded together with an adhesive 4, such as a polyamide hot melt type adhesive 4. Bring them into close contact with each other.

In this case, as shown in FIG. 2, a recess 5 matching the width and thickness of the joining ring 3 is provided around the inner periphery of the open end of the cup-shaped pieces 1, 1, and the joining ring 3 is fitted into this recess 5. This is then adhered to each other using adhesive 4 as described above.

Further, as shown in FIG. 3, a protrusion 6 of an appropriate height is provided around the outer periphery of the joint ring 3, and the open end 2 abuts with the protrusion 6 sandwiched between the protrusions 6.
, 2 may be closely attached to the joining ring 3 using the adhesive 4 as described above.

Reference numeral 7 denotes a cap whose open end is attached to either of the two joined cups 1, 1.

As explained above, in the container of the present invention, the open ends 2, 2 of the two cup-shaped pieces 1, 1 and the joining ring 3 are joined with adhesive, so the joining is much easier than in the case of welding. Easy to work with.

Moreover, since the joining is a surface joining of the entire inner circumferential surface of the open end 2 of the two cup-shaped beads 1, 1 and the outer circumferential surface of the cylindrical joining ring 3, the joining area is wide and the joining part is A shear structure is formed which is particularly advantageous in terms of strength.

Therefore, the pressure resistance and airtightness of the joint can be sufficiently increased.

In addition, since the joints do not melt unlike welding, the container material can use the minimum necessary thin metal plate, which reduces material costs and simplifies the entire manufacturing process. can.

In the present invention, since substantially the entire outer peripheral surface of the joining ring 3 is bonded to the two cup-shaped pieces 1, 1, the joining ring 3 not only serves as a connecting means for both the pieces 1, 1, but also serves as a means for connecting the two pieces 1, 1. , 2 over a wide area and actively acts as a strength-retaining member, and the strength is also increased in this respect.

A more detailed explanation of this point is as follows.

In other words, since the container targeted by the present invention is a small pressure-resistant container made of a thin metal plate, there is a high risk of deformation due to external impact or internal pressure.

Moreover, in a container shaped like the two bottomed cylindrical cup-shaped pieces 1, 1 as in the present invention, the entire body (peripheral wall) is cylindrical, so when considering the deformation strength of the whole body, Generally speaking, it is weakest in the middle in the longitudinal direction (vertical direction).

However, in the present invention, the two cup-shaped pieces 1, 1 are made to have approximately the same size and shape, and are joined at the open ends 2, 2 via the joining ring 3 fitted inside thereof.
is located inside the intermediate portion of the container body.

Therefore, in the present invention, the intermediate portion of the fuselage, which tends to have the lowest strength, is reinforced by the joint ring 3, so that deformation etc. can be effectively prevented.

Moreover, since the joining ring 3 is cylindrical and the open end portion 2 is also cylindrical, the joining surface is also a cylindrical surface.

Therefore, compared to the case where the joint surface is partially spherical, the ends 2, 2
It is possible to improve the fitting precision of the joint ring 3 and the joint strength.

Furthermore, in the present invention, a recess 5 matching the width and thickness of the joint ring 3 is provided around each open end 2 as shown in FIG. 2, or a protrusion is provided on the outer periphery of the joint ring 3 as shown in FIG. Since the joint ring 3 is fitted and fixed to the inner surface of each open end portion 2 over a generally uniform width by the groove 5 or the protrusion 6, the following advantages can be obtained. .

That is, in the structure shown in FIG. 2, an annular recess 5 is provided by both open ends 2, and the joining ring 3 is fitted into the recess 5.
By simply fitting the joint ring 3 into the recess 5 during assembly, the vertical position (position in the width direction of the joint ring) of the joint ring 3 can be accurately determined, and the width can be approximately evenly spaced against the inner surface of each open end 2 (
1/2) can be fitted into the joint ring 3 (can be positioned at the midline position).

Therefore, there is no need to finely adjust the vertical position of the joint ring 3 one by one, and the assembly work is simplified.

In addition, the fitting width of the joining ring 3 is made uniform, and each open end 2 is made uniform.
Since the bonding strength of the bonding ring 3 can be made uniform, the strength of the entire bonded portion can be reliably improved, and the reliability of the product in terms of strength can be improved.

In the structure shown in FIG. 3, the protrusion 6 provided on the outer periphery of the joint ring 3 fits between the open ends 2 and 2 to position the joint ring 3. Similarly, assembly work can be simplified and reliability in terms of product strength can be improved.

[Brief explanation of the drawing]

FIG. 1 is a schematic vertical cross-sectional view of an embodiment of the present invention, FIG. 2 is an enlarged partial view, and FIG. 3 is an enlarged partial view of another embodiment. 1... Cup-shaped piece, 2... Open end, 3...
Joining ring, 4... Adhesive, 5... Concave portion, 6... Projection.

Claims (1)

[Scope of utility model registration request] Two cup-shaped pieces each having a bottomed cylindrical shape and a substantially uniform shape formed from a thin metal plate are joined at the open end of the cylindrical peripheral wall via a cylindrical joining ring fitted inside the cylindrical peripheral wall. A cap is provided on the cup-shaped piece, and the tips of each open end are abutted, and a recess or a protrusion is provided around the outer periphery of the joint ring that matches the width and thickness of the joint ring provided around each open end. The joining ring is fitted and fixed to the inner surface of each open end over a generally equal width by the strip, and the joining ring and the inner surface of each open end of the two cup-shaped pieces are closely joined by adhesive. Features: Pressure-resistant small container.