JPH11301758A - Spray can device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a small-sized spray can device in which the number of manufacturing steps and the number of component parts can be reduced, its productivity can be improved, its cost-down can be realized and its safety characteristic my also be improved. SOLUTION: This spray can device is comprised of a can main body 2 in which sprayed substances are charged in an inner space part 4, a stem 12 having a nozzle hole 20 and a valve mechanism 10 including a valve main body 11 in which the stem 12 is projected and slidably assembled in it. Then, a substantial cylindrical valve mechanism fixing section 5 to which the valve mechanism 10 is assembled and fixed is integrally formed with the can main body 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for sealing a liquefied fuel gas, a deodorant, a fragrance and the like to be injected into an airtight container having a valve mechanism such as a fuel can or an aerosol can. The present invention relates to an injection can device that is opened to eject an object to be ejected from a nozzle hole of a stem.

[0002]

2. Description of the Related Art For example, a fuel can is used as a fuel for a heat source for heating, such as a gas stove for home or outdoor camping, or as a fuel source for lighting. The fuel can is configured as a closed container to which a valve mechanism for controlling the communication between the inside and the outside is assembled. The inside of the fuel can is filled with a liquefied fuel gas such as liquefied butane having relatively low activity. The pressure inside the fuel can is increased with respect to the outside air due to vaporization of the filled liquefied fuel gas. For this reason, when the valve mechanism is opened and the inside and the outside of the fuel can communicate with each other, the fuel gas vaporized from the nozzle hole is ejected to the outside having a lower pressure than the inside.

As shown in FIG. 6, a conventional injection can device 100 has a can main body 101 made of a steel material or the like in a substantially cylindrical shape, and an upper end opening 101a of the can main body 101.
And a valve assembly 102 assembled to the valve. A bottom plate, not shown, is attached to the lower end opening of the can body 101. The valve assembly 102 includes a substantially cap-shaped lid member 103 and a substantially conical top dome 104.
And a valve mechanism 106 mounted on a mounting portion 105 formed integrally with the lid member 103.

[0004] The valve assembly 102 is assembled by caulking an attachment flange 107 formed on the outer periphery of the top dome 104 to the can body 101. Further, the valve assembly 102 is combined with an inner peripheral edge of the top dome 104 by caulking a mounting flange portion 108 formed on an outer peripheral portion of the lid member 103 via a packing 109. The lid 103 is integrally formed with a mounting portion 105 which is located at a central portion thereof and has a substantially cylindrical shape and to which the above-described valve mechanism 106 is mounted.

The valve mechanism 106 includes a valve body 110
A stem 112 having a nozzle hole 111 slidably assembled in a guide hole of the valve body 110, a rubber 113 sealing between the stem 112 and the mounting portion 105, and a valve attached to the stem 112. A member 114 and a member such as a coil spring 115 for urging the stem 112 in a direction protruding from the mounting portion 105 are formed. Although the details of the valve mechanism 106 are omitted, the gap between the nozzle hole 111 and the outside is closed by the valve spring 114 being pushed upward by the coil spring 115. When the stem 112 is pushed in the valve mechanism 106, the valve member 114 moves downward, and communication between the nozzle hole 111 and the outside is established.

[0006] The injection can device 100 configured as described above.
Is filled with a liquefied fuel gas such as liquefied butane in the internal space 116 of the can body 101. A part of the liquefied fuel gas is vaporized so that the internal pressure of the internal space 116 is higher than the external pressure. Therefore, the injection can device 100 causes the fuel gas vaporized from the nozzle hole 111 to be ejected to the outside by pressing the stem 112 as described above.

[0007]

By the way, in the injection can device 100 having a valve mechanism 106 such as a fuel can or an aerosol can, a valve structure 102 including a lid member 103, a top dome 104, etc. And the can body 101 are supplied by different manufacturing / distribution routes, and assembled by a gas filling manufacturer or the like, and the interior space 116 is filled with an appropriate object such as a liquefied fuel gas or a fragrance and provided. Have been.
In other words, in the injection can device 100, at least the can body 101 and the valve assembly 102 are required as essential components and obtained from different manufacturing / distribution routes, and the valve assembly 102 is caulked with respect to the can body 101. It has been manufactured through an attaching process and a liquefied gas filling process.

[0008] From the above-mentioned circumstances, the injection can device 100 has a problem that the specifications of the can main body 101 are determined based on a so-called off-the-shelf valve assembly 102, so that the injection can device cannot be formed into a free shape or the like. Was. Further, in the injection can device 100, there is a problem that the product management of the can body 101 and the valve assembly 102 is separately performed and the caulking process is required, so that the manufacturing cost is increased. Further, the fuel can 100 has a problem that a precise caulking process and a strict inspection process are required to prevent gas leakage from the caulked portion between the can body 101 and the valve assembly 102 so as not to occur. .

The injection can device 100 is relatively expensive because the valve assembly 102 is composed of a large number of members as described above, and must be purchased as a standard part. And it was difficult to achieve cost reduction. In addition, the injection can device 1
In the case of 00, since the valve assembly 102 also has a caulking site at the site of the lid member 103 and the top dome 104, a strict acceptance inspection step at the time of purchase was also required.

[0010] Accordingly, an object of the present invention is to provide a spray can device in which the number of manufacturing steps and the number of parts are reduced to improve productivity, reduce costs, and improve safety.

[0011]

In order to achieve the above-mentioned object, a spray can device according to the present invention has a substantially cylindrical valve mounting portion for integrally mounting and fixing a valve mechanism to a closed container. . In the spray can device, the valve mounting portion is formed integrally with the ceiling portion of the closed container so as to protrude outward or to protrude inward.

According to the injection can device of the present invention having the above-described structure, the valve mechanism is attached to the valve mechanism mounting portion formed integrally with the can body. This reduces the number of steps for fixing the valve cover and the number of parts, thereby improving productivity and reducing costs.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, specific embodiments of a spray can device according to the present invention will be described in detail with reference to the drawings. The injection can device shown as an embodiment is a small fuel can 1 suitable for use only for banquets at homes or inns, and for cooking or keeping heat in a restaurant in a relatively short time. As shown in FIG. 1, the fuel can 1 includes a can main body 2.
And a valve mechanism 10 attached to the bottom plate member 3 and the can main body 2. The fuel can 1 has an internal space 4
Liquefied fuel gas, for example, liquefied butane having relatively low activity, is filled in a pressurized state. The internal pressure of the fuel can 1 is higher than that of the outside air due to the vaporization of the liquefied fuel gas filled in the internal space 4.

The can main body 2 is formed integrally by forming, for example, a deep drawing process using a thin metal plate material so as to present a substantially seamless bottomed cylindrical shape having one end closed and the other end opened. It becomes. For the can body 2, an appropriate material such as a steel material, a stainless steel material, or an aluminum plate is selected as the metal thin plate material in accordance with the conditions such as the outer shape and the internal pressure or the application. Further, the can main body 2 is manufactured through one or a plurality of deep drawing press steps according to the external dimensions, thickness dimensions, the material of the metal sheet material, the performance of the press machine, and the like. After the deep drawing press step, the can body 2 is formed by cutting the opening portion and performing post-processing. The can body 2
For example, the fuel can 1 is extremely small, having an inner diameter of about 35 mm and a height of about 38 mm, and is small.

The can body 2 has a closed one end on the ceiling 2.
a, and an outer peripheral surface that is vertically continuous from the ceiling 2a is configured as a trunk 2b. As shown in FIG. 1, the can body 2 is configured as a bottom plate mounting portion 2c by bending the open end portion into a U-shaped cross section over the entire circumference. In the can main body 2, a valve mechanism mounting portion 5, which is located at the center of the ceiling portion 2a and has a substantially cylindrical shape with a seamless bottom and integrally projects upward, is formed upright.

The can body 2 has a bottom plate member 3 at an opening at the lower end.
Is attached to form an overall closed container. The bottom plate member 3 is formed in an arcuate cross section that curves inward at a gentle curvature, and has an engaging portion 3a formed over the entire outer periphery. The bottom plate member 3 maintains mechanical strength against the internal pressure of the internal space 4 by this shape, and promotes vaporization of the liquefied fuel gas filled in the internal space 4. As shown in FIG. 1, the bottom plate member 3 is assembled to the can main body 2 by engaging the engaging portion 3a with the bottom plate attaching portion 2c and crimping it so as to be rolled up. Fuel can 1
Is configured.

The valve mechanism mounting portion 5 is formed integrally from the ceiling portion 2a of the can main body 2 to form a mounting space portion 6 sufficient for accommodating a valve mechanism 10 to be described later, and a guide hole 8 is formed at an upper end portion 7 thereof. Is formed. Valve mechanism mounting part 5
Exposes the stem 12 outward from the guide hole 8 as described later. After mounting the valve mechanism 10 in the mounting space 6 as described later, the valve mechanism mounting portion 5 is subjected to a crimping process in which the neck portion 5a is narrowed from the dotted line shown in FIG. Is done. Fuel can 1
As described above, the valve mechanism mounting portion 5 is integrally formed with the can main body 2 so as to exhibit a characteristic appearance with a sense of unity as a whole.

The valve mechanism 10 is constituted by members equivalent to those of a conventionally known valve mechanism, and includes a valve body 11, a stem 12, a packing 13, a stem rubber 14, a coil spring 15, a spring receiving member 16, and the like. It is composed of members. The valve body 11 has an outer diameter substantially equal to the inner diameter of the mounting space portion 6 of the valve mechanism mounting portion 5 made of, for example, Duracon resin, and has a stem hole 17 into which the stem 12 is slidably mounted as described later. It is formed in a substantially cylindrical shape. Valve body 11
The lower outer peripheral portion 11a corresponding to the neck 5a of the valve mechanism mounting portion 5 is formed to have a small diameter. Valve body 11
Has an annular packing mounting recess 11b on the top surface of which the packing 13 is mounted.

In the valve body 11, the lower part of the stem hole 17 is formed to have a large diameter and an inner peripheral thread 18a is formed on the inner periphery to form a mounting portion 18 for the spring receiving member 16. The valve body 11 is provided with a gas flow path 19 which is formed on the outer peripheral surface and communicates from the outer peripheral portion 11 a to a corresponding portion of the mounting portion 18 and communicates with the inside of the mounting portion 18. As will be described later, the gas passage 19 is provided in the mounting space portion 6 of the valve mechanism mounting portion 5 by the valve mechanism 10.
The outer peripheral portion 11 a is closed by the outer peripheral wall of the valve mechanism mounting portion 5 in a state where the valve mechanism mounting portion 5 is assembled.

The stem 12 is formed in the shape of a pipe, for example, of stainless steel, and has a nozzle hole 20 formed therein as a bottomed hole. On the stem 12, a locking flange portion 21 is integrally provided at an outer peripheral portion corresponding to a lower end of the nozzle hole 20 so as to protrude around the circumference. Of course, the nozzle hole 20 is opened at the upper end of the stem 12.
As shown in FIG. 2, the nozzle hole 20 is bent laterally from the lower end and opens on the outer peripheral surface of the stem 12. The nozzle hole 20 is thereby configured to communicate with a gas flow path 19 formed in the valve body 11. Stem 12
Is slidably assembled in the stem hole 17 of the valve body 11 in the vertical direction.

In the valve mechanism 10, the packing 13 is joined to the packing mounting recess 11b of the valve body 11 and the upper surface 18b of the mounting portion 18 in order to seal the space between the stem hole 17 and the stem 12 of the valve body 11. The stem rubber 14 is attached. The packing 13 is formed into an overall substantially cylindrical shape having an inner hole 13a by an elastic material such as rubber, for example, and has a projection 13b integrally protruding from an upper surface thereof. The packing 13 has its base fitted into the packing mounting recess 11b and is fixedly joined with an adhesive or the like. The packing 13 is formed such that the wall of the inner hole 13 a is pressed against the outer peripheral surface of the stem 12 so that the inner hole 13 a
To seal between. The packing 13 has a convex portion 13b.
Is fitted into the guide hole 8 of the valve mechanism mounting portion 5 while being elastically deformed.
And the valve body 11 are sealed.

The stem rubber 14 is formed in an approximately ring shape having an inner hole 14a by an elastic material such as rubber. The inner diameter of the inner hole 14 a of the stem rubber 14 is slightly smaller than the inner diameter of the stem hole 17. Therefore, the stem rubber 14 is attached to the mounting portion 1 of the valve body 11.
The inner peripheral portion projects into the stem hole 17 in a state where the inner peripheral portion is joined to the upper surface 18 b of the base 8. In the normal state, the stem rubber 14 is closed at a position corresponding to the opening of the nozzle hole 20 as shown in FIG. Therefore, the valve mechanism 10 includes the stem rubber 14
Thus, the space between the gas passage 19 and the nozzle hole 20 of the stem 12 is sealed.

The stem 12 is given a projecting behavior from the stem hole 17 of the valve body 11 by the elastic force of the coil spring 15. The coil spring 15 is connected to the stem 12
And the spring receiving member 16 is mounted in a slightly compressed state. The spring receiving member 16 is formed in a substantially cup shape entirely from a metal material or a synthetic resin, and has an outer peripheral screw 22 formed in an outer peripheral portion at an upper end portion.
The spring receiving member 16 is configured such that the outer peripheral screw 22 is connected to the inner peripheral screw 1.
It is attached so as to close the bottom of the attachment portion 18 of the valve body 11 by screwing to the screw 8a. The coil spring 15 is mounted between the bottom surface 16a of the spring receiving member 16 and the locking flange 21 to push the stem 12 upward.

The spring receiving member 16 has an opening 16b formed in a bottom surface 16a. This opening 16b
Constitutes a second gas flow path by communicating the internal space 4 of the can body 2 with the internal space of the spring receiving member 16 and communicating with the gas flow path 19 described above.

The valve mechanism 10 constructed as described above
In the state where the constituent members are assembled, the convex portion 13b of the packing 13 is fitted into the guide hole 8 and
Is mounted in the mounting space 6 of the valve mechanism mounting portion 5 formed integrally with the valve mechanism. The valve mechanism 10 includes a valve body 11
Is supported on the inner surface of the valve mechanism mounting portion 5, and the stem 12 protrudes outward from the guide hole 8 via the packing 13.

The can main body 2 is subjected to a caulking process for narrowing the neck 5a of the valve mechanism mounting portion 5 in which the valve mechanism 10 is assembled in the mounting space 6 in this manner. The can body 2 has a neck portion 5a having a small diameter according to the shape of the outer peripheral portion 11a of the valve body 11, as shown in FIG. The can 1 is constituted.

In the fuel can 1, the attaching step of the valve mechanism attaching section 5 to the can main body 2 is performed before the attaching step of the bottom plate member 3 to the can main body 2. The fuel can 1 is mounted on a fuel gas filling machine, and the internal space 4 is filled with a high-pressure liquefied fuel gas from the nozzle hole 20 with the stem 12 pressed down.

The fuel can 1 constructed as described above is used, for example, by loading it on a tabletop gas stove. In the fuel can 1, when the valve opening operation is performed by the valve opening mechanism on the gas stove and the stem 12 is pressed, the valve mechanism 10 is opened, and the fuel gas vaporized in the internal space 4 is changed by the internal pressure. It is ejected from the nozzle hole 20. That is, as shown in FIG. 3, when the valve mechanism 10 strongly presses the stem 12, the stem 12 slides in the stem hole 17 inward against the elastic force of the coil spring 15. In the valve mechanism 10, even when the stem 12 slides, the outer peripheral portion is sealed by the packing 13, so that no gas leaks from the stem hole 17.

The stem 12 slides in the stem hole 17 while elastically deforming the stem rubber 14 as shown in FIG.
The nozzle hole 20 closed by 4 moves downward to be in communication with the gas flow path 19. Valve mechanism 1
0 indicates the gas flow path 1 as shown by the arrow in FIG.
The fuel gas vaporized in the internal space 4 via the nozzle 9 flows into the nozzle hole 20 by the internal pressure, and further blows out from the nozzle hole 20 to the outside.

In the fuel can 1, when the valve closing operation is performed by the valve opening mechanism on the gas stove side and the pressing force on the stem 12 is released, the valve mechanism 10 closes to stop the injection of the fuel gas. That is, the valve mechanism 10
When the pressing force on the stem 12 is released, the stem 12 returns to the initial position in the stem hole 17 by the elastic force of the coil spring 15. Valve mechanism 10
In the initial position of the stem 12, the nozzle hole 20 is closed again by the stem rubber 14 as shown in FIG. Therefore,
The fuel can 1 stops supplying the fuel gas to the gas stove.

In the fuel can according to the present invention, the fuel can 1 is connected to the guide hole 8 of the valve mechanism mounting portion 5 by the stem 12 as described above.
Although it has been described as having a structure that protrudes from
The structure is not limited to the one having such a structure, and may be such a structure that the stem 12 is housed in the stem hole 17 of the valve body 11 as shown in FIG.

That is, in the fuel can 30, as shown in FIG. 4, the stem 12 is formed such that the axial length thereof is shorter than the stem hole 17 of the valve body 11. The stem 12 seals the stem hole 17 by pressing the inner hole 13 a of the packing 13 at the upper end. The fuel can 3
0 denotes the structure of the can body 2 and the stem 12 of the valve mechanism 10.
Except for this, the fuel can 1 has the same structure as the fuel can 1 described above.

Therefore, in the fuel can 30, the stem pressing member provided on the valve opening mechanism on the gas stove side to be loaded enters the stem hole 17 and presses the stem 12, whereby the valve mechanism 10 is opened. You. With the opening operation of the valve mechanism 10, the fuel can 30
The fuel gas vaporized in the internal space 4 is ejected from the nozzle hole 20 by the internal pressure. The stem 12 is pressed by the stem pressing member of the valve opening mechanism being fitted into the inner hole 13 a formed in the packing 13, and slides in the stem hole 17. In the fuel can 30, even when the stem 12 slides, the stem pressing member of the valve opening mechanism is formed to have a larger diameter than the inner hole 13 a of the packing 13. There is no gas leakage from the stem hole 17 because the gap is maintained.

When the stem 12 slides, the fuel can 30 is brought into a state where the nozzle hole 20 of the stem 12 closed by the stem rubber 14 is communicated with the gas flow path 19 as in the case of the fuel can 1 described above. The fuel gas vaporized in the space 4 flows into the nozzle hole 20 due to the internal pressure, and is further ejected from the nozzle hole 20 to the outside.

In the fuel can 30, when the stem pressing member of the valve opening mechanism on the gas stove is pulled out from the inner hole 13a of the packing 13, the closing operation of the valve mechanism 10 is performed to stop the injection of the fuel gas. The valve mechanism 10 includes a stem 12
When the pressing force of the stem pressing member against is released,
The stem 12 returns to the initial position in the stem hole 17 by the elastic force of the coil spring 15. Fuel can 30
In the initial position of the stem 12, the nozzle hole 20 of the stem 12 is closed again by the stem rubber 14, the communication with the gas flow path 19 is cut off, and the supply of the fuel gas is stopped.

In the above-described fuel cans 1 and 30, the valve mechanism mounting portion 5 is formed so as to protrude outwardly from the ceiling portion 2a of the can main body 2 and to be integrally formed, but the present invention is limited to such a configuration. Not. That is, the fuel can 40 shown in FIG. 5 is characterized in that the ceiling portion 2a of the can main body 2 is provided with a valve mechanism mounting portion 41 which is integrally formed so as to protrude inward at the center thereof. The fuel can 40
Other configurations are the same as the fuel can 1 described above.

The valve mechanism mounting portion 41 is formed as a substantially cylindrical bottomed concave portion on the ceiling 2a of the can main body 2, and the valve mechanism 10 is assembled therein. The valve mechanism 10 is substantially the same as the above-described valve mechanism 10 of the fuel can 30, and includes a valve body 11, a stem 12, a packing 13, a stem rubber 14, a coil spring 15, a spring receiving member 16, and other members. It is configured. The valve body 11 is formed such that its height and outer diameter are substantially equal to the depth and inner diameter of the valve mechanism mounting portion 41. The packing 13 is assembled to the valve main body 11 with the upper surface constituting substantially the same plane as the upper surface of the valve main body 11.

The valve mechanism 10 is loaded into the valve mechanism mounting portion 41 so as to be dropped from above. The valve mechanism 10 is assembled to the valve mechanism mounting portion 41 such that the spring receiving member 16 projects from the guide hole 42 on the bottom surface into the internal space 4. After the valve mechanism 10 is assembled, the valve mechanism 10 is subjected to a caulking process of narrowing the upper end 43 to a small diameter, thereby tightening the outer peripheral portion of the valve body 11 to fix and hold the valve mechanism 10.

The fuel can 40 ejects the vaporized fuel gas in the internal space 4 by the same operation as the fuel can 1 described above, and stops the ejection of the fuel gas. For example, when the stem 12 is pressed by a valve opening mechanism on the side of the gas stove to be loaded, the valve mechanism 10 is opened, and the fuel gas vaporized from the internal space 4 is supplied to the nozzle can by the internal pressure. 2
Eject from 0. Even when the stem 12 is pressed and slid, the fuel can 40 does not leak from the stem hole 17 because the outer peripheral surface of the stem 12 is sealed by the packing 18. Further, the valve closing operation is performed by the valve opening mechanism on the gas stove side of the fuel can 40, and when the pressing force on the stem 12 is released, the valve mechanism 10 closes to stop the injection of the fuel gas.

Each of the fuel cans 1, 30, and 40 is small in size as described above, so that the amount of fuel gas charged into the can body 2 is small. Each fuel can 1, 30, and 40
For this reason, as described above, banquets at home or inns, heating and cooking in restaurants in a relatively short time, is used as a fuel source for heat retention, for example, combustion efficiency using a catalyst such as platinum It is more effective when used as a fuel source for expensive combustion equipment.

In the above-described embodiment,
The fuel cans 1, 30, and 40 used as fuel sources for heating and keeping heat for the gas stove and the like have been described, but the present invention is not limited to such fuel cans.
If the injection can device according to the present invention is intended to ignite liquefied fuel gas as a fuel, for example, a lighting device such as a gas lamp can be provided by attaching an ignition mechanism near a stem that ejects liquefied fuel gas. It can also be used as a fuel source for ignition devices such as gas appliances and gas lighters.

Further, in the injection can device according to the present invention, not only the fuel can described above, but also the inside of the can body is filled with an object such as a deodorant, a bactericide or an aromatic, and these objects are filled. It can also be deployed in aerosol cans that are sprayed out in mist by the pressure of the air sent into the can body.

[0043]

According to the injection can device of the present invention having the above-described structure, the valve mechanism mounting portion for directly assembling the valve mechanism integrally with the can body is formed.
Unlike the conventional valve structure, members such as a lid, a dome top, and packing are not required, and the caulking process for fixing the mountain cup to the can body and the inspection process are reduced, resulting in a significant reduction in cost and productivity. Is improved. Further, according to the injection can device according to the present invention, there is no limitation on the specifications of the can main body, which was limited by the valve structure provided as an off-the-shelf product, and it is possible to develop a characteristic design and simplify the manufacturing process. Is achieved. Furthermore, according to the injection can device according to the present invention, since it is configured to be small, it can be developed into a portable spray device or the like.

[Brief description of the drawings]

FIG. 1 is a partially cutaway longitudinal sectional view of a fuel can shown as a first embodiment of an injection can device according to the present invention.

FIG. 2 is a longitudinal sectional view of a main part of the fuel can, showing an initial state in which a stem is not pushed in.

FIG. 3 is a vertical sectional view of a main part of the fuel can, showing a use state in which a stem is pushed into the fuel can.

FIG. 4 is a partially cutaway longitudinal sectional view of a fuel can shown as a second embodiment of the injection can device according to the present invention.

FIG. 5 is a partially cutaway longitudinal sectional view of a fuel can shown as a third embodiment of the injection can device according to the present invention.

FIG. 6 is a longitudinal sectional view of a main part of a conventional fuel can.

[Explanation of symbols]

1, 30, 40 fuel can (injection can device), 2 can body,
2a ceiling, 5 valve mechanism mounting section, 6 mounting space, 8 guide hole, 10 valve mechanism, 11 valve body, 12 stem, 13 packing, 14 stem rubber, 15 coil spring, 16 spring receiving member, 17 stem hole, 20 nozzle holes

Claims (3)

[Claims] An injection can device in which an object to be ejected is sealed in a sealed container having a valve mechanism incorporated therein, and the object to be ejected is ejected from a nozzle hole by opening the valve mechanism. Wherein a substantially cylindrical valve mounting portion to which the valve mechanism is assembled and fixed is integrally formed. 2. The injection can device according to claim 1, wherein the valve mounting portion is formed integrally with a ceiling portion of the closed container so as to protrude outward. 3. The injection can device according to claim 1, wherein the valve attachment portion is formed integrally with the ceiling portion of the closed container can by protruding inward.