JPH0415804Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to an investment material for closing a hanging hole provided in a manhole cover.

<Prior art> As shown in FIG. 6, the manhole cover B has a hanging hole 10 recessed in at least one side of its upper surface, and a hanging shaft 11 is installed at a position approximately above the center of the hanging hole 10. There is one in which the tip of the opening/closing handle 13 is hooked onto the hanging shaft 11 so that the manhole cover B can be opened easily.

However, with this manhole cover B, there is a problem that the hanging hole 10 becomes clogged with dirt and sand during the blockage, making it difficult to insert the opening/closing handle 13. To prevent this, the surface of the hanging hole 10 is It is closed with investment material A.

Conventionally, as this type of investment material A, those shown in FIGS. 7 to 10, for example, have been used.

That is, two engaging legs 15 are integrally protruded from the lower surface of the lid part 14 of the investment material made of metal or hard synthetic resin, and both engaging legs 15 are arranged facing each other with an interval equal to or more than the horizontal width of the hanging shaft 11. It was placed in

<Problem that the idea aims to solve> However, the above structure has the following problems.

(b) Sediment enters the gap between the investment material and the hanging hole, causing the investment material to become stuck, and it takes time to remove the investment material when opening the lid.

(b) As mentioned above, the investment material is simply a hard material loosely fitted into the hanging hole, so due to the vertical vibration of the manhole cover when a car passes, the investment material loosely fitted into the hanging hole will jump up and hang. Sometimes they can escape from the hole.

C. Since the investment material is made of hard material,
When removing this from inside the hanging hole, you have to lift it straight up, which makes the work difficult.

The present invention can be buried tightly in the hanging hole of a manhole cover, will not come off even when the manhole cover vibrates, and can be easily installed and removed from the diagonal direction. To provide an investment material that can be easily taken up by bending the investment material.

<Means for Solving the Problems> In order to achieve the above object, the present invention is constructed as shown in FIGS. 1 to 6, for example.

That is, the investment material A is made of a soft synthetic resin with excellent heat resistance, water resistance, and oil resistance, or an elastic material such as rubber, and is formed of a lid part 1 and an engaging leg 2, and the lid part 1 has a hanging hole 10.
The engaging leg 2 is formed into a plate-like flat part large enough to fit tightly into the opening surface of the lid part 1, and the engaging legs 2 are provided protrudingly at substantially symmetrical positions on the lower surface of the lid part 1 to be insertable and removable into the hook hole 10. Place the hanging scroll 1 at a position facing each other inside the hanging scroll 1.
1, and a groove 6 that is substantially parallel to the plate-like flat surface of the lid is formed at the base of both engaging legs 2.

<Effect> Next, its effect will be explained.

When the hanging shaft 11 that spans the hanging hole 10 of the manhole cover B is positioned on both engaging legs 2 of the investment material A, and the investing material A is pushed into the hanging hole 10 from above, the hooks that have fit into the hanging hole 10 will be removed. Pairing leg 2 is hanging hole 10
At the same time, the hanging shaft 11 is inserted into the engaging groove 4 formed inside both engaging legs 2, and the opening surface of the hanging hole 10 is fixed to the lid part 1 of the investment material A. It is tightly covered.

Furthermore, when removing the investment material A, the groove 6 is formed at the base of the engagement leg 2 so that the engagement leg 2 can be bent and curved using the connection side of the base as a fulcrum. When the hanging shaft 11 is extracted from the inside of the matching groove 4, the engagement legs 2 open outward and do not obstruct the extraction, and can be easily extracted. In addition, when lifting the investment material A in a diagonal state, the soft lid part 1 warps, and this together with the engagement legs 2 bending as described above, causes the investment material A to bend.
can be lifted easily.

<Example> A rectangular hanging hole 10 for opening the cover is provided on both left and right sides of the upper surface of the manhole cover B. This hanging hole 1
0, there is an opening/closing handle 13 located approximately above the center.
A hanging shaft 11 for hanging objects, etc. is spanned, and stepped portions 12 for supporting both ends of the investment material A are formed at both left and right end positions of the hanging shaft 11.

The investment material A is made of a heat-resistant and oil-resistant soft synthetic resin or an elastic material such as rubber, and has a lid part 1 and a pair of left and right engaging legs 2 protruding from the lower surface of the lid part 1. be.

The lid part 1 is formed into a rectangular plate-shaped flat part approximately the same size as the opening of the hanging hole 10, and a flange part 7 and a groove 8 for inserting a screwdriver for removing investment materials are formed at both left and right ends of the lid part 1. A groove 9 is formed in the upper surface in the front-rear direction.

Both engaging legs 2 are arranged at symmetrical positions on the left and right sides. On the inner surface of each engaging leg 2, a V-shaped inclined surface 5 for guiding the hanging shaft 11 is formed in the lower part thereof, and an engaging groove 4 for holding the hanging shaft 11 in the upper part thereof, and furthermore, each engaging leg 2 has an engaging groove 4 for holding the hanging shaft 11 therebetween. A groove 6 is formed at the base of the joint leg 2 and is substantially parallel to the plate-like flat surface of the lid.

Further, each engagement leg 2 is formed in a forked shape, and its outer surface 3 is formed in a shape to contact the inner surface of the hanging hole 10, and the intermediate portion between the inner surface and the outer surface 3 is formed hollow. ing.

Note that the shape of the plate-like plane part of the lid part 1 is not limited to a rectangular shape, but may be formed in any shape that matches the opening surfaces of the various hanging holes 10 of the manhole cover B.

<Effects of the Invention> The present invention is configured and operates as described above, and thus has the following effects.

(b) Since the investment material can be buried in the hole with the cover of the manhole cover tightly fitted into the opening surface of the hole in the manhole cover, there will be no gap and the material will not fit inside the hole while the cover is closed. The investment material can be easily removed because no earth and sand will enter and no sticking phenomenon will occur due to earth and sand stuck in the gaps.

(b) Since the investment material is tightly fitted into the hanging hole and is buried with the hanging shaft being held between the two engaging legs, it will not be affected by the vertical vibrations applied to the manhole cover when a car wheel passes by. The investment material does not jump up, thereby preventing the investment material from jumping out from inside the hanging hole.

(c) The split groove formed at the base of the engaging leg allows the lid to be bent in a concave arc shape when removed, making it easier to remove the investment material from the hanging hole and making it easier to tilt the investment material. It can be easily removed even when it is in a closed state, making the work easier.

[Brief explanation of drawings]

Fig. 1 is a side view showing this embodiment, Fig. 2 is a plan view showing this embodiment, Fig. 3 is a vertical sectional view showing the assembled state of this embodiment, and Fig. 4 is an assembly of this embodiment. FIG. 5 is a side view showing the assembled state of this embodiment, FIG. 6 is a perspective view of the manhole cover, FIG. 7 is a side view of the conventional example, and FIG. 8 is the conventional example. FIG. 9 is a longitudinal sectional view showing an assembled state of a conventional example, and FIG. 10 is a plan view showing an assembled state of a conventional example. A... Investment material, B... Manhole cover, 1... Cover part, 2... Engaging leg, 4... Engaging groove, 6... Division groove.

Claims (1)

[Claims for Utility Model Registration] 1. The above hanging of the manhole cover B, which is formed by having a hanging hole 10 recessed in at least one side of the top surface of the manhole cover B, and a hanging shaft 11 extending over the hanging hole 10 at a position approximately above the center of the hanging hole 10. In the investment material used to close the surface of the hole 10, this investment material A is heat resistant,
The lid part 1 is made of an elastic material such as soft synthetic resin or rubber with excellent water and oil resistance, and is formed of a lid part 1 and an engaging leg 2, and the lid part 1 is plate-shaped and has a size that can be tightly fitted into the opening surface of the hanging hole 10. Formed on a flat surface, one engaging leg 2
There are hanging holes 10 at approximately symmetrical positions on the bottom surface of the lid part 1.
An engaging groove 4 is formed in the interior of the engagement legs 2 so as to be insertable and removable, and an engagement groove 4 that engages with the hanging shaft 11 is formed at a position facing each other inside the engagement legs 2, and the lid portion is provided at the base of the engagement legs 2. A groove 6 that is approximately parallel to the plate-like plane part
A hanging hole investment material 2 for a manhole cover characterized by forming a hanging hole investment material 2 for a manhole cover as described in Claim 1 of the Utility Model Registration Claim, in which extracting grooves 8 are attached to both left and right ends of the cover part 1. 3. In the manhole cover sinking material described in Claim 1 of the Utility Model Registration Claim, each engaging leg 2 is formed into a bifurcated shape.