JP3285464B2 - Masu lid - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lid for a box, and more particularly to a lid for a box which seals the opening of the box by the action of packing to exhibit a waterproof action and a deodorant action.

[0002]

2. Description of the Related Art A basin lid of this type is used to prevent unknown water from flowing into a sewer pipe from an opening of the basin during heavy rainfall or flooding.
Alternatively, it is used when it is required to prevent odor from leaking from the sewage pipe through the opening. This type of lid generally employs a structure in which a lid body attached to the opening of the box is equipped with an elastic packing, and the lid body of such a lid is reinforced with unsaturated polyester. Some are manufactured by heating and press-molding a resin concrete (resin-con) in which materials and aggregates are mixed.

FIG. 6 shows a packing 2 attached to a lid body 1 made of a plastic resin.
Is a cross-sectional view showing a case where the conventional lid A equipped with is attached to the lid receiving portion 3 on the side of the cell and the opening 4 of the cell is closed. FIG. 7 is an enlarged sectional view of a main part of FIG. As shown in these drawings, the lid main body 1 is provided with a cylindrical packing holding surface 11 protruding from the lid main body 1, and the packing holding surface 11 is provided with an annular base 21 of the packing 2. Are held in a fitted state, and the outer peripheral edge of the tongue piece 22 projecting obliquely upward from the lower end of the annular base 21 outward is formed as a contact portion 23, and the contact portion 23 is formed.
Are in close contact with the inner peripheral surface 31 of the lid receiving portion 3 with some deformation of the tongue piece portion 22. In FIG. 7, the shape of the tongue piece 22 in a natural state (no load state) is indicated by a virtual line.

Incidentally, the conventional lid A shown in FIGS.
In the packing 2, the annular base 21 is attached to the lid main body 1.
Is bonded to the packing holding surface 11 using an adhesive to prevent the packing holding surface 11 from falling off from the lid main body 1. On the other hand, the lid body 1
Is a molded body of a resin-container, it is necessary to apply a release agent to the molding surface of the mold in advance, so that the release agent is applied to the surface of the lid body 1 removed from the mold after release. Is attached. Therefore, in order to securely join the annular base 21 of the packing 2 to the packing holding surface 11 with an adhesive, it is necessary to wipe off the release agent from the surface of the lid body 1 before joining.

[0005]

However, since a solvent is used when wiping and removing the release agent adhering to the surface of the lid body 1, the solvent may adversely affect the human body. In order to wipe away all the mold agent, a troublesome wiping operation must be carefully performed, which leads to a reduction in work efficiency and a decrease in productivity.

Further, as long as the means for holding the packing 2 on the lid body 1 with an adhesive is employed, it is difficult to use a packing made of polyethylene, which has a property that it is difficult to bond with the adhesive but has a long service life.

The present invention has been made under the above circumstances, and measures have been taken to ensure that the packing is securely held on the packing holding surface of the lid body so that the packing is not easily detached without using an adhesive. Accordingly, it is an object of the present invention to provide a lid for a box which does not require a troublesome work of wiping a release agent or applying an adhesive.

[0008]

The measure lid according to the present invention comprises:
In a lid for a vessel, in which a lid body attached to the opening of the basin is provided with an elastic packing that is in close contact with the inner peripheral surface of the lid receiving part provided in the opening, the lid body includes A cylindrical gasket holding surface protruding from the main body, an annular groove provided in the gasket holding surface in a concave shape, and a gasket provided in the back surface of the lid body adjacent to the outside of the gasket holding surface. An annular concave portion is provided, and a packing is fitted on the packing holding surface and an upper end portion thereof is opposed to an outer peripheral wall surface of the annular concave portion. A projection fitted into the groove and supported by the bottom surface of the annular groove, and an annular tongue piece that projects outward from the annular base and has a tip portion that is a close contact with the inner peripheral surface of the lid receiving portion. , Is provided.

In the present invention, the distance between the upper end surface of the annular base of the packing and the lower surface of the protruding portion in the axial direction is h, and the upper wall surface of the annular recess provided in the lid body and the bottom surface of the annular groove. If the distance in the axial direction with respect to H is defined as H, the relationship between the two may be such that h <H as in the invention according to claim 2.
H> H as in the invention according to claim 3, and h = H as in the invention according to claim 4.

[0010]

In the box lid according to the present invention, the protrusion provided on the annular base of the packing fitted to the packing holding surface of the lid body is formed by the annular groove provided in the packing holding surface in a concave shape. Since the packing is supported by the bottom surface, the annular base of the packing is prevented from falling down from the packing holding surface. Also, when the annular base of the packing attempts to deform in the direction of expanding the upper end thereof due to the downward force applied to the tongue piece of the packing, the upper end of the annular base hits the outer peripheral wall surface of the annular recess on the lid body side. Since such deformation is suppressed, it is possible to prevent a situation in which the upper end portion of the annular base is expanded and deformed so that the protruding portion comes out of the annular groove and the annular base falls down from the packing holding surface.

In the present invention, the axial distance h between the upper end surface of the annular base portion of the packing and the lower surface of the protruding portion and the axial direction between the upper wall surface of the annular concave portion provided on the lid body and the bottom surface of the annular groove portion. If the relationship with the interval H is h <H, when the annular base of the packing is pushed into the packing holding surface of the lid body,
The protrusion fits into the annular groove of the lid main body before the annular base hits the upper wall surface of the annular concave portion of the lid main body, so that the packing can be easily mounted on the lid main body. Even when h = H, when the annular base of the packing is pushed into the packing holding surface of the lid body, the annular base protrudes before being pressed against the upper wall surface of the annular recess of the lid body. Since the portion fits into the annular groove of the lid body, the same effect is exerted.

If h> H, the upper end surface of the annular base of the packing mounted on the lid body and the lower surface of the projection are pressed by the upper wall surface of the annular recess in the lid body and the bottom surface of the annular groove. As a result, the packing attached to the lid body does not rattle, and the overlap between the upper end surface of the annular base portion and the upper wall surface of the annular concave portion, or the overlap between the lower surface of the projecting portion and the bottom surface of the annular groove portion. Since the watertightness is ensured at each location, this is synergistic with the fact that the tongue piece of the packing closely adheres to the inner peripheral surface of the lid receiving part to ensure the watertightness of the place and the lid receiving part and the lid The packing keeps the body completely watertight. This action is also exhibited when h = H.

Further, in the present invention, it is not necessary to use an adhesive to hold the packing on the lid body, so that the lid body having the packing holding surface, the annular groove and the annular recess integrally formed is provided. Even if the mold is released from the molding surface on which the release agent is applied, there is no room for poor adhesion due to the residual release agent or poor adhesion due to deterioration of the adhesive over time.

[0014]

FIG. 1 is a sectional view of a use state of a cover A according to an embodiment of the present invention, FIG. 2 is a plan view of the cover A, and FIG. 3 is a cross-sectional view in which main parts of FIG. 1 are enlarged.

The lid body 1 of the lid A has a recessed handle portion 12 on the front side as shown in FIG. 1 or FIG. Also, as shown in FIGS. 1 and 3, an annular protrusion 1 is provided near the outer peripheral edge on the back surface side.
The projection 13 has an outer peripheral surface serving as a cylindrical packing holding surface 11. The packing holding surface 11 has an annular groove 15 in a concave shape.
A concave annular recess 16 is provided on the back surface of the lid body 1 adjacent to the outside of the cover body 1. Further, an annular fitting portion 14 is provided on the outer peripheral edge of the lid main body 1, and when the lid main body 1 is attached to the opening 4 of the cell, the fitting portion 14 is closed by the lid of the lid receiving portion 3. It is fitted into the receiving groove 32 and positioned. Further, the lid body 1 is a molded body made of a plastic resin, and at the time of molding, a mold release agent is applied to a molding surface (not shown) of the mold in advance. Therefore, a release agent adheres to the surface of the lid body 1 released from the molding surface, and the release agent is wiped off as necessary.

The packing 2 mounted on the lid body 1 is made of an elastic packing material such as polyethylene or rubber, and it is determined whether the packing material is made of a material suitable for bonding with an adhesive. It doesn't matter. As shown in FIG. 3, the packing 2 includes an annular base 21 having a cylindrical shape,
A protruding portion 24 projecting inward from the annular base portion 21
And an annular tongue piece 22 which projects outwardly from the annular base 21 and has a contact portion 23 at the tip. In the packing 2 in the illustrated example, the protruding portion 24 protrudes inward at the axially intermediate portion of the annular base portion 21, and the upper surface of the protruding portion 24 is tapered to form a tapered inclined surface 25. The tongue piece 22 projects from the lower end of the annular base 21. In this packing 2, the upper end surface 27 of the annular base 21 and the protrusion 2
The distance h in the axial direction (hereinafter referred to as a vertical distance) between the lower surface 28 of the base 4 and the bottom surface 18 of the annular groove 15 provided in the lid body 1 and the upper wall surface 19 of the annular recess 16 are defined in the axial direction. (Hereinafter referred to as a vertical interval) H.
Specifically, the relationship between the two vertical intervals h and H is h <h.
H relationship.

When the packing 2 is mounted on the lid body 1, the packing 2 is opposed to the projection 13 of the lid body 1 as shown by an imaginary line in FIG. It only has to be pushed into the part 13. With this configuration, the inclined surface 25 of the projection 24 serves as a guide, and the projection 24 easily fits on the packing holding surface 11. At this time, the projection 24 is pressed by the projection 13 and the annular base 21 is pressed. While the diameter is increased, the upper end surface 27 of the annular base 21 is
Before being pressed (before hitting), the projection 13 is fitted into the projection 13, and the upper end 26 of the annular base 21 is fitted into the annular recess 16. Therefore, the upper end 26 of the annular base 21 faces the outer peripheral wall surface 17 of the annular recess 16. When the packing 2 is attached to the lid main body 1 in this manner, the relationship of h <H helps to facilitate the work.

In the lid A described above, the packing 2
The protrusion 24 provided on the annular base 21 fitted to the packing holding surface 11 of the lid body 1
Since it is supported by the bottom surface 18 of the one annular groove 15, the annular base 21 does not fall down from the packing holding surface 11.

When the lid A is mounted on the lid receiving portion 3 as shown in FIG. 1, the contact portion 23 of the tongue 22 of the packing 2 is resiliently deformed with the elastic deformation of the tongue 22 as shown in FIG. Receiving part 3
The water tightness of this portion is secured by closely adhering to the inner peripheral surface. In the packing 2 having the relationship h <H described above, the inner diameter of the annular base 21 is determined by the protrusion 13 of the lid body 1.
By making the outer diameter slightly smaller than the outer diameter, it is possible to prevent rattling in the mounted state. And packing 2
Is preferably made to have a relation of h <H when is made of a hard synthetic resin.

Here, for example, when the lid A is detached from the lid receiving portion 3 to open the opening 4 (FIG. 1) of the box, the close contact portion 23 of the tongue piece 22 becomes the inner peripheral surface of the lid receiving portion 3. 3, a downward force P is applied to the tongue piece 22 of the packing 2 as shown in FIG. When such a force P is applied to the tongue piece 22, the force tends to deform the annular base 21 of the packing 2 in a direction of expanding the upper end portion as indicated by an arrow D1. If the upper end of the annular base 21 is deformed in a direction in which the diameter of the annular base 21 expands indefinitely, the protrusion 24 expands under the influence of the deformation and comes off the annular groove 15, and the annular base 21 moves downward from the packing holding surface 11. There is a risk of falling off. However, the above-described deformation of the upper end of the annular base 21 in the direction in which the diameter increases is such that the upper end of the annular base 21 hits the outer peripheral wall surface 17 of the annular recess 16 and unlimited deformation is suppressed. In this case, the projection 24 is prevented from expanding from the annular groove 15 due to its diameter, so that the annular base 21 does not fall down from the packing holding surface 11.

Even when the above-mentioned vertical interval h and H have a relationship of, for example, h = H, the operation of mounting the packing 2 on the lid body 1 can be easily performed. The protrusion 24 provided on the annular base 21 fitted to the packing holding surface 11
Since the annular base 15 is supported by the bottom surface 18 of the annular groove 15, the annular base 21 does not fall down from the packing holding surface 11. And when in this relationship,
The upper end surface 27 of the annular base 21 of the packing 2 and the lower surface 28 of the protruding portion 24 form the upper wall surface 1 of the annular concave portion 16 in the lid body 1.
9 and the bottom surface 18 of the annular groove 15 are sandwiched without any gap, so that the packing 2 is less likely to rattle. In addition, in the same manner as described above, infiltration of unknown water and leakage of odor from the sewage pipe are reliably prevented, and the high waterproof and deodorizing performance of the lid A is exhibited. Other operations are the same as those of the packing 2 in which h <H.

When the above-mentioned vertical interval h and H have a relationship of, for example, h> H, as shown in FIG. 5, the upper end surface 27 of the annular base 21 of the packing 2 and the lower surface 28 of the protruding portion 24 are in the lid body. Upper wall surface 19 of annular recess 16 and annular groove 1
5, the packing 2 does not rattle, and the upper end surface 27 of the annular base 21 is not pressed.
Water-tightness is secured at the overlapping portion between the annular recess 16 and the upper wall surface 19 and at the overlapping portion between the lower surface 28 of the projection 24 and the bottom surface 18 of the annular groove 15. Therefore,
The watertightness between the lid receiving portion 3 and the lid main body 1 is secured by the packing 2 interposed therebetween, thereby surely preventing infiltration of unknown water and leakage of odor from the sewage pipe. As a result, high waterproof and deodorant performance by the lid A is exhibited. Other operations are the same as those of the packing 2 in which h <H.

FIG. 4 shows a packing 2 and a lid body 1 according to a modification.
A combination of the annular groove 15 and the annular recess 16 on the side is shown.

The packing 2 shown in FIG. 4 differs from the packing 2 shown in FIG. 3 in that the inner peripheral edge of the projecting portion 24 has an edge shape in cross section. It differs from the lid body of FIG. 3 in that the cross-sectional shape of the projection 24 is substantially the same. The packing 2 shown in the same figure exerts the same operation as that described with reference to FIG.

[0025]

According to the present invention, the packing can be securely held on the lid body without using an adhesive simply by fitting the packing into the packing holding surface of the lid body. In this case, the axial distance h between the upper end surface of the annular base portion of the packing and the lower surface of the protruding portion, and the axial distance H between the upper wall surface of the annular concave portion provided on the lid body and the bottom surface of the annular groove portion are as follows. By setting h <H or h = H, the mounting operation of the packing to the lid body can be particularly easily performed. Also,
There is an effect that the packing can be mounted on the lid body with one touch without performing a troublesome application operation of the adhesive. Therefore, it is possible to use a polyethylene packing which has a property that it is difficult to join with an adhesive but has a long service life. In addition, it is possible to securely hold the packing even with respect to the resin-contained lid main body released from the molding surface coated with the release agent, regardless of whether or not the release agent remains on the lid main body. become able to.

Further, according to the present invention, since the packing does not fall off, a lid for a box which can maintain a reliable waterproof and deodorant function for a long time can be obtained. And, in particular, the axial distance h between the upper end surface of the annular base portion of the packing and the lower surface of the protruding portion.
The relationship between the distance H in the axial direction between the upper wall surface of the annular concave portion provided in the lid body and the bottom surface of the annular groove portion is set to h <H, so that such a waterproof and deodorant function can be more reliably achieved. Will be demonstrated.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a used state of a lid according to an embodiment of the present invention.

FIG. 2 is a plan view of a lid.

FIG. 3 is an enlarged sectional view of a main part of FIG. 1;

FIG. 4 is a partial cross-sectional view showing a usage state of a packing and a lid main body according to a modified example.

FIG. 5 is a partial sectional view showing a usage state of a packing and a lid body according to another modification.

FIG. 6 is a cross-sectional view of a conventional lid in use.

FIG. 7 is an enlarged sectional view of a main part of FIG. 6;

[Explanation of symbols]

Reference Signs List A lid 1 lid body 2 packing 3 lid receiving portion 4 opening of cell 11 packing holding surface 15 annular groove portion 16 annular concave portion 18 bottom surface of annular groove portion 21 annular base portion 22 tongue piece portion 23 close contact portion 24 projecting portion H bottom surface of annular groove portion Axial spacing between the upper wall surface of the annular recess and h. Axial spacing between the upper end surface of the annular base of the packing and the lower surface of the protrusion.

Claims (4)

(57) [Claims] 1. A container lid provided with an elastic packing which is attached to an inner peripheral surface of a lid receiving portion provided in the opening, the lid body being attached to the opening of the container. On the main body, a cylindrical packing holding surface protruding from the lid main body, an annular groove provided in a concave shape on the packing holding surface, and a back surface of the lid main body adjacent to the outside of the packing holding surface. An annular concave portion provided in a concave shape, wherein a packing is fitted on the packing holding surface and an upper end portion is opposed to an outer peripheral wall surface of the annular concave portion; And a projection that fits into the annular groove and is supported by the bottom surface of the annular groove, and an annular projection that extends outward from the annular base and has a tip portion that is in close contact with the inner peripheral surface of the lid receiver. And a tongue piece. 2. The axial distance between the upper end surface of the annular base of the packing and the lower surface of the protrusion is greater than the axial distance between the upper wall surface of the annular recess provided in the lid body and the bottom surface of the annular groove. The lid for a basin according to claim 1, which is also smaller. 3. The axial distance between the upper end surface of the annular base of the packing and the lower surface of the protrusion is the axial distance between the upper wall surface of the annular recess provided in the lid body and the bottom surface of the annular groove. 2. The lid according to claim 1, which is the same. 4. The axial distance between the upper end surface of the annular base of the packing and the lower surface of the protrusion is greater than the axial distance between the upper wall surface of the annular recess provided in the lid body and the bottom surface of the annular groove. 2. The basin lid according to claim 1, wherein