JPS627039Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a container lid for completely shielding the opening of a container with an extremely simple construction.

Conventionally, for example, shielding containers with rectangular or circular openings using blind lids has been done simply through sheet-like packing, and the waterproof and airtight parts of the tightening bolts are incomplete.
There was no suitable countermeasure against such a shield configuration.

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a container lid that eliminates the above-mentioned drawbacks.

The above objects, advantages and configurations of the present invention will be clearly understood from the following detailed description with reference to the preferred embodiments thereof.

Now, in the first preferred embodiment of the present invention, the lid side of the container is extracted and partially cut away.
Referring to the figure, the container 10 has a rectangular opening 11
and a threaded portion 13 for receiving a tightening bolt 12. In this example, since the opening 11 is rectangular, the screw portions 13 are provided at four locations at the four corners. A sheet-like packing 15 made of an elastic material such as synthetic rubber is provided on the opening-side outer surface 14 of the container 10, and a blind lid, ie, a presser plate 16, is placed on the outside thereof. As is clear from the above description, each of the packing 15 and the holding plate 16 is provided with four bolt holes through which the tightening bolts 12 are passed. In this case, the bolt through holes for the holding plate 16 may be fairly stupid holes, but it is better to make the bolt through holes for the gasket 15 as close to the outside diameter of the bolt as possible so that they will dig into the thread root during tightening. You can expect a more complete shield effect.

Now, referring to FIG. 2 which shows an enlarged view of the bolt tightening part in FIG. An auxiliary gasket 17 is provided. Further, the auxiliary packing 17 is housed in a relatively deep dish-shaped cap 18 to the extent that its open end does not come into contact with the surface of the presser plate 16 when tightening is completed. In this case, the dimensions of the bolt through hole of the auxiliary packing 17 are preferably as close as possible to the outer diameter of the threaded portion of the bolt 12, as in the case of the packing 15. According to experiments, the container lid formed with the above configuration is as good as the conventional packing 15.
It has been found that almost perfect waterproofing and airtightness, that is, a shielding effect, can be achieved with an extremely simple configuration in which the auxiliary gasket 17 and the cap 18 are additionally provided in addition to the configuration consisting of the auxiliary packing 17 and the cap 18. The above-mentioned shielding effect unique to the present invention is achieved for the first time by a configuration in which the auxiliary packing 17 is surrounded by a deep dish-shaped cap 18 and its deformation laterally with respect to the pressing direction is restricted (restrained). It will be done. Although a certain degree of shielding effect can be obtained by using an ordinary flat washer instead of the deep dish-shaped cap 18, it is still not sufficient, and by surrounding the auxiliary gasket with the cap 18, wind, rain and sunlight can be prevented. It is also necessary to prevent deterioration of the characteristics of the auxiliary packing material and maintain the shielding effect stably over a long period of time.

The improvement of the container lid represented by the first embodiment above has a great advantage in that it can be applied to devices currently in use without requiring any changes to the main body. That is, the device currently in use can be transformed into a container lid with almost perfect shielding effect by simply preparing a somewhat longer bolt 12, auxiliary packing 17, and cap 18.

Now, referring to FIG. 3, which shows a second embodiment in which a part of FIG. Everything is the same as that of the first embodiment in FIG. 2, except for the changes in . That is, a raised part 19 is provided on the side of the container adjacent to the opening 11 so that the raised part 19 bites into the gasket 15 when the container lid is tightened, thereby achieving a more complete shielding effect.

Although the present invention has been described above based on its two preferred embodiments, those skilled in the art will
Obviously, many changes and modifications may be made without departing from the spirit and scope of the invention.

[Brief explanation of the drawing]

Figure 1 shows a first embodiment of the container lid according to the present invention, with the lid side of the container partially cut away;
The figure is an enlarged view of the bolt tightening portion in FIG. 1, and FIG. 3 is an extracted view of the same bolt tightening portion as in FIG. 2 of the second embodiment of the present invention. DESCRIPTION OF SYMBOLS 10... Container, 11... Opening, 12... Tightening bolt, 15... Sheet packing, 16... Pressing plate, 17... Auxiliary packing, 18... Cap.

Claims (1)

[Scope of utility model registration request] A container lid that closes the opening of a container with a sheet-like packing includes a sheet-like packing 15 made of an elastic material disposed outside the opening 11 of the container 10 to close the opening; Pressing plate 1 for pressing the packing from its outer surface
6, and an auxiliary gasket 17 made of an elastic material and having a through hole for receiving a bolt-like member used for tightening, which is used outside the presser plate and at each tightening position of the gasket and the presser plate. Surrounding deep dish-shaped cap 1
8. A container lid characterized in that it consists of a combination of 8.