JPS639653Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field to Which the Invention Pertains] The present invention relates to a handhole waterproofing device comprising a handhole waterproofing cap fixed to a handhole holder frame.

In general, conduits, manholes, handholes, tunnels, etc. are known as underground track structures for accommodating and protecting communication cables such as telephone cables, repeaters, loaded coils, etc., but the present invention , among these, relates to handholes, and more specifically relates to handhole waterproof devices.

[Prior art and its problems]

Figure 2 is a plan view of a typical hand hole, Figure 3
The figure is a sectional view taken along line A-A' in FIG. 2. In these figures, 1 is an iron handhole lid, 2 is a handhole receiving frame, 3 is a waterproof cap, 10 is a road surface, 11 is a concrete handhole body located underground, and 12 is a conduit.

As already explained, the main body 11 houses and protects communication cables, repeaters, loading coils, etc., but when working on cable connections etc., open the lid 1 and By removing the waterproof cap 3, work can be carried out from the ground.

As described above, the present invention relates to a handhole waterproof device, which is comprised of a handhole receiving frame 2 and a waterproof cap 3, among other handholes.

FIG. 4 is an enlarged sectional view of a main part of a conventional hand hole waterproof cap fixing device, and FIG. 5 is a perspective view showing a conventional "Γ" (gamma) type fixing packing.

Hereinafter, a conventional hand hole waterproofing device will be explained with reference to FIGS. 2 to 5.

As shown in Fig. 3, the conventional handhole waterproofing device simply attaches a handhole waterproof cap membrane (hereinafter referred to as waterproof cap membrane) 3 to the bottom of a handhole receiving frame 2 provided on the upper outer periphery of the handhole hole. After fitting and mounting, the linear packing 8 in the shape of "Γ" (gamma) shown in FIG. 5 is inserted into the groove 2S of the hand hole receiving frame 2 as shown in FIG. 3 is fixed, and an outer cover 1 having approximately the same height as the road surface (ground surface) 10 is placed over the hand hole receiving frame 2.

The above configuration will be explained in more detail. The hand hole receiving frame 2 has an annular bottom with a rectangular hole in the center, a bottom 2-1 on the outside, a groove 2S adjacent to the bottom 2-1, and a protrusion 2-3 on the inside.
will be established. The top surface of the protruding portion 2-3 is at the same height as the bottom surface portion 2-1.

On the other hand, the waterproof cap membrane 3 is attached to the hand hole receiving frame 2.
The cap groove 3-1 has the same shape as the cap groove 3-1 and has an annular groove-shaped cross section with a downward opening on the outer periphery, and the size of the groove 3-1 is large enough to fit into the protrusion 2-3. . The cap groove 3-1 of the waterproof cap membrane 3 is fitted into the protrusion 2-3, and the side wall bottom portion 1- of the annular side wall 1-1 protrudes downward from the outer lid 1.
2 on the bottom part 2-1 to complete the assembly of the hand hole waterproofing device.

In the above configuration, the "Γ" (gamma) type fixing packing 8 is pushed into the groove 2S to fix the cap film 3 to the groove 2S. The horizontal part of -1 becomes an obstacle, resulting in insufficient insertion, and the waterproof cap 3 is not sufficiently fixed, and the cap groove 3-1 and the protrusion are fitted into the protrusion 2-3 of the hand hole receiving frame 2. There was a drawback that a gap was likely to occur between 2 and 3, and water was likely to enter the hand hole.

The horizontal portion 8-1 of the packing 8 was originally provided for the purpose of pressing the groove portion 3-1 of the waterproof cap membrane 3 against the protruding portion 2-3, but when actually used, However, it has been found that they do not play such a role, but rather become the cause of the problems described above.

[Purpose of invention]

The present invention has been made in order to eliminate the drawbacks of the prior art as described above, and therefore, the purpose of the present invention is to provide a hand hole in which water intrusion into the hand hole is less likely to occur than before. Our goal is to provide hall waterproofing equipment.

[Key points of the idea]

The main points of the present invention are that a groove is provided in the annular bottom formed inside the hand hole receiving frame, an upward protrusion is formed on the inside adjacent to the groove, and a cap groove that opens downward on the outer periphery of the tip is formed to make the hand hole waterproof. In a handhole waterproofing device in which the waterproof cap membrane is attached by fitting the cap groove of the cap membrane into the protrusion and a lid is placed over the handhole receiving frame, packing having a wedge-shaped cross section is provided. The handhole waterproof cap membrane is fixed to the handhole receiving frame by pushing one or more of the packings into the groove of the handhole receiving frame with the wedge-shaped tips facing downward.

[Example of idea]

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 6 is a perspective view of the fixing packing 5 used in the present invention, and FIG. 7 is a sectional view of the packing.

In these figures, 5 indicates a packing for fixing the waterproof cap membrane (hereinafter simply referred to as packing) used in the present invention, 6 indicates its upper surface, 7 indicates its lower surface, and 13A and 13B indicate side surfaces, respectively.

The shape of the packing 5 used in this invention is as follows:
As is clear from FIGS. 6 and 7, it has a wedge-shaped cross-section, consisting of an upper surface portion 6 and a lower surface portion 7 which are horizontal portions, and side portions 13A and 13B which are sloped portions.

FIG. 1 is a sectional view showing the main parts of an embodiment of the present invention. In this figure, the same reference numerals as in FIGS. 2 to 4 indicate the same parts and portions.

An embodiment of the present invention will be described with reference to FIG. In the present invention, a hand hole waterproof cap membrane 3 is placed on the bottom of the hand hole receiving frame 2. Then, the cap groove 3-1 of the waterproof cap 3 is fitted into the protrusion 2-3 of the hand hole receiving frame 2.

In this state, a packing 5 is inserted from above between the outer plate 3-2 of the cap groove 3-1 of the waterproof cap 3 and the outer wall 2-2 of the groove 2S of the hand hole receiving frame 2 (2-4). It is inserted as if it were driven in, and an impact force is applied to the upper surface 6 of the packing 5 with a hammer or the like. Packing 5
The packing 5 is formed linearly in the longitudinal direction, and is inserted into the groove 2S, which is also linear in the longitudinal direction of the hand hole receiving frame 2. It is best to insert it across the board. However, the number of packings 5 inserted into the annular groove 2S may be one, and it goes without saying that the number does not have to be large enough to cover the entire outer circumference.

Since the cross-sectional shape of the packing 5 is wedge-shaped, when it is driven in with a hammer, its fixing force becomes large, and the waterproof cap 3 is pressed into the groove 2S by the wedge-shaped tip projection. The material of the packing 5 may be made of plastic such as polyethylene, or rubber, as long as it can provide sufficient fixing force.

[Effect of idea]

As explained above, according to the present invention, since packing with a wedge-shaped cross-section, such as made of plastic, is used, even if the handhole waterproof cap is deformed due to water pressure, heat, etc., the handhole waterproof cap can be fixed. This has the advantage that it can be done reliably and that water can be reliably prevented from flowing into the hand hole for a long period of time.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view showing the main parts of an embodiment of the present invention, Fig. 2 is a plan view of a general hand hole, and Fig. 3 is a cross-sectional view taken along line A-A' in Fig. 2. Figure 4 is an enlarged cross-sectional view of the main parts of a conventional hand hole waterproof cap fixing device, Figure 5 is a perspective view showing a conventional "Γ" (gamma) type fixing packing, and Figure 6 is a view of the present invention. FIG. 7 is a perspective view of the packing used, and FIG. 7 is a sectional view thereof. Code explanation, 1... Hand hole lid, 1-1...
Annular side wall, 1-2...Annular side wall bottom part, 2...Hand hole receiving frame, 2-1...Bottom part, 2-2...
Outer wall, 2S...Groove, 2-3...Protrusion, 2-
4... Between, 3... Waterproof cap, 3-1... Cap groove, 3-2... Outer plate, 5... Fixing packing used in the present invention, 6... Fixing packing upper surface, 7... ...Fixing packing lower surface part, 8... Conventional "Γ" (gamma) type fixing packing, 8-1... Horizontal part, 10... Road surface, 1
1...Hand hole body, 12...Pipe line, 13
A, 13B... Side part.

Claims (1)

[Scope of utility model registration request] The cap groove of the handhole waterproof cap membrane is formed by providing a groove in the annular bottom surface formed inside the handhole receiving frame, forming an upwardly protruding part on the inner side adjacent to the groove, and forming a cap groove opening downward on the outer periphery of the tip. In the hand hole waterproofing device, the hand hole waterproofing device is constructed by fitting the waterproof cap membrane into the protruding portion and covering the hand hole receiving frame with a lid. The handhole waterproofing device is characterized in that the handhole waterproof cap membrane is fixed to the handhole receiving frame by pushing the packing into the groove of the handhole receiving frame with its wedge-shaped tip facing downward.