JPH0424857Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field This invention relates to a double sealing device for an externally threaded mouthpiece in a container such as a drum can.

Conventional technology In general, the caps of containers such as drums are externally threaded, in which a flange with a male thread is fitted onto the rising cylinder of the top plate, and a flange with a female thread is press-fitted into the rising cylinder of the top plate. An internally threaded type is known.

Conventionally, a plug having an internal packing on the inside of the top wall is screwed onto an externally threaded flange, and a cap seal made of a metal plate is fitted over the plug, so that the lower edge of the hanging wall of the cap seal is It has already been known that the plug is folded into the gap between the lower edge of the peripheral wall of the plug and the top plate, thereby sealing the mouthpiece (see, for example, Japanese Utility Model Publication No. 38493/1983).

Problems to be Solved by the Invention However, with such a conventional sealing device, the sealing of the mouthpiece is done only by the internal gasket, so the sealing is not sufficient. If rainwater accumulates on the top surface of the top plate inside the unit, the mouthpiece will be submerged in the rainwater, and the rainwater will enter the inside of the drum due to the suction phenomenon caused by changes in the internal pressure of the drum.
There was a problem with the contents getting dirty. In addition, when the drum is stored on its side, there is a problem that the contents may leak if the internal gasket of the mouthpiece is not completely sealed.

Furthermore, conventionally, a packing has been interposed on the annular outside between the lower edge of the peripheral wall of the plug, which has an internal packing fitted over the externally threaded flange of the rising cylinder part of the top plate, and the top surface of the top plate. This is known (for example, see Japanese Utility Model Application Publication No. 60-43548). According to this conventional device, it is possible to reliably seal the mouthpiece with the double inner and outer packing, but it is necessary to fit an annular outer packing onto the flange in advance before fitting and covering the flange with the plug. There is,
This is very troublesome, and since the external packing is first placed between the lower edge of the plug's peripheral wall and the top surface of the top plate, there is the problem that the only way to seal it is with a cap seal. Ta.

By the way, it is already known that an external packing is attached to the inner surface of the lower half of the hanging wall of a cap seal attached to an internally threaded mouthpiece of a drum by a so-called lining (for example, see Japanese Utility Model Application Publication No. 129651/1983). ).

However, in this conventional cap seal with a lining gasket, the lower half of the hanging wall is pressed and deformed toward the rising cylinder part of the top plate, and is formed in a protruding shape on the outer surface of the upper end of the rising cylinder part. It is hooked onto the folded tip of a press-fit flange to perform a sealing action, and such cap seals with gaskets for internally threaded caps can be applied to externally threaded caps of drum cans. I can't. This is because, unlike the case of an internally threaded cap, the externally threaded cap has a folded end of a flange on which the lower half of the hanging wall of the cap seal should be hooked to the outer surface of the rising cylinder of the top plate. This is because the section does not exist.

The purpose of this invention is to solve the above-mentioned problems of the conventional technology, and to improve the bonding strength between the lower edge of the hanging wall of the cap seal and the lower edge of the peripheral wall of the plug in the external threaded cap of containers such as drums. The annular outer gasket, which has a sufficient thickness and is strongly crimped onto the top surface of the top plate, can ensure sealing and sealing, and this allows rainwater collected on the top surface of the top plate to be drained from containers such as drums. A double sealing device for the externally threaded mouthpiece of containers such as drums, which can reliably prevent intrusion into the interior and also prevent the leakage of the contents of containers such as drums that are lying on their side. That's what we're trying to offer.

Means for Solving the Problems In order to achieve the above object, this invention uses an externally threaded flange that is fitted over and fixed to a rising cylinder portion that is provided in a predetermined position on the top plate in an upwardly protruding manner. , a plug screwed onto the flange and having an internal packing inside the top wall, a cap seal made of a metal plate fitted over the plug, and a space between the lower edge of the hanging wall of the cap seal and the top surface of the top plate. In a double sealing device for an externally threaded cap part of a container such as a drum, which is equipped with an annular external packing interposed therebetween, a folded part having an approximately V-shaped cross section in cross section is attached to the lower edge of the hanging wall of the cap seal body. A packing mounting wall with a convex arc-shaped cross section extending outward through the mounting wall is provided, and an annular external packing made of an elastic material is fixed to the concave lower surface of this mounting wall, and the internal packing is fixed to the concave lower surface of the mounting wall. The cap and
When the seal is fitted, the lower edge of the hanging wall of the cap seal body is press-fitted into the gap between the lower edge of the peripheral wall of the plug and the top plate, and the lower edge of the hanging wall is made of metal. The plate is deformed due to plastic deformation, and the lower edge of the hanging wall, the folded part with a roughly V-shaped cross section, the packing wall with a convex arc cross section, and the external packing enter into the gap together, causing the peripheral wall of the plug to deform. The gist of this invention is a double sealing device for an externally threaded mouthpiece of a container such as a drum can, which is latched to the lower edge of the container and has an external gasket crimped onto the top surface of the top plate.

Effect: According to the double sealing device of the externally threaded cap part of the above-mentioned container such as a drum can, a seal is formed on the lower edge of the hanging wall of the cap seal body, and extends outward from the hanging wall through a folded part having a substantially V-shaped cross section. A packing mounting wall having a convex arc cross section is provided, and an external packing is fixed to the concave lower surface of the mounting wall. Therefore, the cap
When the lower edge of the hanging wall of the seal body is press-fitted into the gap between the lower edge of the peripheral wall of the plug and the top plate, the lower edge of the hanging wall is deformed by plastic deformation of the metal plate, and the hanging wall is deformed by plastic deformation of the metal plate. The lower edge, the folded part with a generally V-shaped cross section, the convex arc cross-section packing mounting wall, and the external packing enter into the gap together, and the lower edge of the hanging wall and the packing are attached to the lower edge of the peripheral wall of the plug. Since the wall is locked in a so-called double overlapping state, the bonding strength is extremely high.

Moreover, when the lower edge of the hanging wall is press-fitted into the gap between the lower edge of the peripheral wall of the plug and the top plate, the lower edge of the hanging wall is forcibly deformed by plastic deformation of the metal plate. Since a repulsive restoring force acts on the lower edge of the hanging wall, the restoring force of this metal plate forces the external packing to be strongly pressed against the top surface of the top plate, thus reducing the sealing performance of the external packing. is very excellent.

In addition, the shape of the seal mounting wall, which is provided at the lower edge of the hanging wall of the cap seal body via a folded part with a generally V-shaped cross section, is shaped like a convex arc in cross section. When fixing an external packing made of an elastic material, such as a lining packing, to the mounting wall, for example, with the cap seal body facing upward, it is easier to apply the elastic material to the concave surface of the mounting wall. It is possible to form an annular outer packing having a sufficient thickness and having an upper surface that follows the concave surface, making it easy to manufacture a cap seal with a packing, and ensuring a reliable sealing effect.

Embodiment Next, an embodiment of this invention will be described based on the drawings.

In FIGS. 1 and 2 showing the first embodiment of this invention, 1 is a cap seal according to this invention, which consists of a cap seal body 2 made of a metal plate such as steel or aluminum, and a cap seal body 2 made of a metal plate such as steel or aluminum, and a It is composed of an annular outer packing 5 made of an elastic material such as resin. A packing mounting wall 4 having a convex arc-shaped cross section is provided at the lower edge of the hanging wall 3 of the cap seal body 2, extending outward from the hanging wall 3 through a folded part 6 having a substantially V-shaped cross section. An annular external packing 5 made of an elastic material and having an upper surface shape conforming to the concave lower surface is fixed to the concave lower surface.

11 is a top plate of the drum, 12 is a rising cylinder part provided in a required position of the top plate 11 in an upwardly projecting manner,
An annular recess 13 is provided in the top plate 11 around this. 14 is a so-called externally threaded flange fixed to the rising cylinder part 12 in a fitted manner;
A male threaded portion 15 is provided on the outer peripheral surface of the upper portion. The upper edge of the flange 14 is pressed down from above by the upper edge bent portion 12a of the rising cylinder 12, and a plurality of outer edges are formed on the inner surface of the lower end of the rising cylinder 12 by pressing and deforming the cylinder. Directional convex portion 22
The rotation of the flange 14 is prevented by engagement with a corresponding recess 23 formed on the inner surface of the lower end of the flange 14.

A plug 17 is fitted over the flange 14 and is made of a pressed steel plate. Hanging peripheral wall 18 around the plug 17
is provided with an internal thread 20, and an internal packing 21 is provided inside the top wall 19 of the plug 18. In this embodiment, the internal packing 21 is made of synthetic resin such as polyethylene, and is an inverted hat-shaped packing consisting of a thick annular sealing part 21a and a covering part 21b connected to the inner side of the sealing part 21a. It is being

Note that the internal packing 21 may of course be composed of only the thick-walled annular seal portion 21a.

The top wall 19 of the plug 17 is provided with a recess 24 that is cross-shaped when viewed from above, and tool hook protrusions 25 are provided at four locations in the recess 24 facing each other.

In the above, when the plug 17 is screwed onto the flange 14 of the drum and is sealed by the internal packing 21, the cap seal 1
is fitted over the plug 17, and the lower edge 3a of the hanging wall 3 of the cap seal body 2 is press-fitted into the gap between the lower edge of the peripheral wall 18 of the plug 17 and the top plate 11 using a jig. The lower edge 3a of the hanging wall 3 is deformed by plastic deformation of the metal plate, and the lower edge 3a of the hanging wall 3, the folded parts 6 and 7 having a substantially V-shaped cross section, and the packing mounting wall 4 having a convex arc cross section. , the external packing 5 enters the gap together with the plug 17.
The outer gasket 5 is crimped onto the upper surface of the top plate 11, so that the externally threaded base part is attached to the inner and outer double gasket 2.
1 and 5, it is securely sealed and sealed at the same time.

In this case, the lower edge 3a of the hanging wall of the cap seal body 2 and the seal mounting wall 4 are latched to the lower edge of the peripheral wall 18 of the plug in a so-called double overlapping state, so that the bonding strength is extremely high. big.

Moreover, the lower edge of the peripheral wall 18 of the plug 14 and the top plate 11
Due to the restoring force of the lower edge 3a of the hanging wall that is forcibly pressed into the gap between the external packing 5 and the upper surface of the top plate 11, the external packing 5 The sealing performance is very good, and this makes it possible to perform sealing and sealing reliably, thereby reliably preventing rainwater collected on the top surface of the top plate 11 from penetrating into the inside of a container such as a drum can. At the same time, it is possible to prevent the contents of a container such as a drum that is lying on its side from leaking.

Further, since the shape of the seal mounting wall 4, which is provided at the lower edge of the hanging wall 3 of the cap seal body 2 via the folded portions 6 and 7 having a substantially V-shaped cross section, has a convex arc shape in cross section. The elastic material can be easily placed on the concave surface of the mounting wall 4, and an annular outer packing 5 having a sufficient thickness and an upper surface shape that follows the concave surface of the mounting wall 4 can be formed to ensure a reliable sealing effect. This is something that can be achieved.

The only way to remove the cap seal 1 is to destroy it, which determines whether it has been opened.

Figure 3 shows cap seal 1 according to this invention.
This shows a second embodiment of the present invention, which differs from the first embodiment in that the hanging wall 3 of the cap seal body 2 is slightly inclined downward and outward, and the lower edge 3a of the hanging wall 3 is is bent slightly inward from the beginning, and the folded portion 7 between this lower edge 3a and the packing mounting wall 4, which has a convex arc cross section, has a U-shape (loose approximately V-shape) in cross section. It is in. By bending the lower edge 3a of the hanging wall 3 slightly inward from the beginning in this way, the lower edge 3a of the hanging wall 3, the folded part 7, the packing mounting wall 4 having a convex arc cross section, and the external packing 5 are formed. The work of pushing the plug into the gap below the plug 17 becomes even easier, resulting in good workability.

In addition to drum cans, this invention can also be applied to the sealing of containers such as gallon cans, which have the same type of external threaded cap.

Effects of the invention As mentioned above, this invention consists of an externally threaded flange that is fitted over and fixed to a rising tube provided at a predetermined location on the top plate in an upwardly protruding manner, and an externally threaded flange that is screwed over the flange and that A plug having an internal packing on the inside of the wall, a cap seal made of a metal plate fitted over the plug, and an annular external packing interposed between the lower edge of the hanging wall of the cap seal and the top surface of the top plate. In the double sealing device for the external threaded mouthpiece of containers such as drums,
At the lower edge of the hanging wall of the cap seal body, a packing mounting wall with a convex arc cross section is provided that extends outward from the hanging wall via a folded part with a roughly V-shaped cross section, and on the concave lower surface of this mounting wall, An annular outer packing made of an elastic material with an upper surface shape that follows this is fixed, and when the cap seal is fitted over the plug fitted to the flange via the inner packing, the cap seal body is The lower edge of the hanging wall is press-fitted into the gap between the lower edge of the peripheral wall of the plug and the top plate, and the lower edge of the hanging wall is deformed by plastic deformation of the metal plate. part, the folded part having a substantially V-shaped cross section, the packing mounting wall having a convex arc-shaped cross section, and the external packing enter the gap together and are latched to the lower edge of the peripheral wall of the plug,
In addition, the external packing is crimped onto the top surface of the top plate, and the lower edge of the hanging wall of the cap seal body and the packing mounting wall overlap the lower edge of the peripheral wall of the plug, so to speak. The bonding strength is very high because it is fixed to the . Moreover, due to the restoring force of the lower edge of the hanging wall that is forcibly inserted into the gap between the lower edge of the peripheral wall of the plug and the top plate,
Since the external gasket is strongly pressed against the top surface of the top plate, the sealing performance of the external gasket is extremely excellent, and this ensures the sealing and sealing of the externally threaded mouthpiece of containers such as drums. For example, it is possible to reliably prevent rainwater that has accumulated on the top surface of the top plate from entering the inside of a container such as a drum can, and also to prevent the contents of a container such as a drum can from leaking when it is lying on its side. be able to.

Furthermore, since the shape of the seal mounting wall, which is provided at the lower edge of the hanging wall of the cap seal body through the folded part with a substantially V-shaped cross section, has a convex arc shape in cross section. It is easy to mount the elastic material on the concave surface, and therefore it is possible to form a sufficiently thick annular outer packing having an upper surface shape that follows the concave surface of the mounting wall, and it is easy to manufacture a cap seal with the packing. This has the effect of reliably achieving a sealing effect.

[Brief explanation of the drawing]

The drawings show an embodiment of this invention. Figure 1 is a partial sectional view of the externally threaded mouthpiece of the drum can of the first embodiment, and Figure 2 is a partial sectional view of only the cap seal. The state before installation is shown. FIG. 3 is a partial sectional view of only the cap and seal showing the second embodiment. DESCRIPTION OF SYMBOLS 1... Cap seal, 2... Cap seal body, 3... Hanging wall, 3a... Lower edge, 4...
... Packing mounting wall with convex arc cross section, 5... External packing, 6, 7... Turned part, 11... Top plate, 1
2...Rising cylinder portion, 14...Flange, 17...
...Plug, 18...Peripheral wall, 21...Internal packing.

Claims (1)

[Scope of utility model registration request] An external screw type flange 14 is fitted and fixed to a rising cylinder portion 12 provided in a predetermined position on the top plate 11 in an upwardly projecting manner, and an internal gasket 21 is screwed onto the flange 14 and is provided inside the top wall 19.
a cap seal 1 made of a metal plate fitted over the plug 17; and an annular external packing 5 interposed between the lower edge of the hanging wall 3 of the cap seal 1 and the upper surface of the top plate 11. In a double sealing device for an externally threaded mouthpiece of a container such as a drum can, the cap seal body 2
At the lower edge of the hanging wall 3, a packing mounting wall 4 with a convex arc cross section is provided which extends outward from the hanging wall 3 via folded parts 6 and 7 with a substantially V-shaped cross section. An annular outer packing 5 made of an elastic material and having an upper surface shape that follows this is fixed to the lower surface, and the flange 14 is connected to the flange 14 via the inner packing 21.
When the cap seal 1 is fitted over the plug 17, the lower edge 3a of the hanging wall 3 of the cap seal main body 2
is press-fitted into the gap between the lower edge of the peripheral wall 18 and the top plate 11, the lower edge 3a of the hanging wall 3 is deformed by plastic deformation of the metal plate, and the lower edge 3a of the hanging wall 3, The folded parts 6 and 7 having a substantially V-shaped cross section, the packing mounting wall 4 having a convex arc-shaped cross section, and the external packing 5 enter into the gap together and are latched to the lower edge of the peripheral wall 18 of the plug 17, and External packing 5
A double sealing device for an externally threaded mouthpiece of a container such as a drum can, characterized in that: is crimped onto the top surface of a top plate 11.