JPS6219786Y2 - - Google Patents

Description

[Detailed explanation of the invention] This invention is suitable for wiring or piping pits, indoor gutters,
The present invention relates to a sealing structure for a floor opening having a plurality of lids, such as a large floor inspection port.

Conventionally, in most of these types of floor opening bodies, a sealing member is interposed only between the outer frame attached to the opening edge of the floor opening and the lid body that allows the floor opening to be opened and closed. In other words, the opposing surfaces of the lids were simply brought into contact with each other. For this reason, sand and water from the outside may enter the floor openings through gaps caused by manufacturing errors, or odor inside the floor openings may leak outside. There was a problem.

On the other hand, in such cases, it may be possible to install a sealing material between the lids, but the lids generally used for floor openings have a considerable weight and cannot be used for long periods of time. In some cases, the sealing material deforms due to the weight of the lid and ceases to function as a sealing material.

The present invention has been developed in response to such circumstances, and an object of the present invention is to provide a sealing structure for a floor opening whose sealing performance does not deteriorate over a long period of time.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 to 3 show a wiring or piping pit A to which a seal structure according to an embodiment of the present invention is applied. This pit A has an outer frame 4 attached to the opening edge 3 of a floor opening 2 opened in the floor surface 1, and a plurality of lids 5 removably fitted into the outer frame 4 to form the floor opening 2. It has a structure that can block 2.

The outer frame 4 has an inward flange portion 7 formed at its lower end that protrudes inward, and a sealing material made of soft synthetic resin or rubber is provided on the upper surface of the inward flange portion 7. 8 is provided. This sealing material 8 consists of a base 9 located on the upper surface of the inward flange 7, and a lip 10 extending downward from the base 9 along the distal end surface of the inward flange 7. The wall becomes thinner as it approaches.

Each lid body 5 fitted into the outer frame 4 has four frame pieces 1
2a, 12a... in a rectangular shape in plan view.
is placed and held on top of the sealing material 8.

On the other hand, as shown in FIG. 2, an engagement recess 12b is formed in the side edge of the lid 5, and the arm 14 is mounted using this engagement recess 12b.

This arm portion 14 is made of hard synthetic resin, is supported by the engagement recess 12b, and has its tip extended to the vicinity of the lower end of the frame of the other lid body. The upper surface is in close contact with the lower end surface of the frame piece 12a and has a lip at its tip.
16 is provided.

Therefore, according to this embodiment, when the lower end of one lid body 5 presses the airtight material 15 of the other lid body 5, the required flexure is generated to exhibit a sealing effect, and the arm Since the part 14 is made of hard synthetic resin, when a certain load is applied to the airtight material 15, the arm part 14 itself will not bend and the airtight material 15 will not be deformed more than necessary.
The airtight material 15 can maintain its sealing effect over a long period of time.

In the embodiment shown in FIG. 2, the arm portion 14 is attached to the side edge of the frame piece 12a, but in addition, as shown in FIG. It may also be attached to the bottom of the piece 12a.

As is clear from the above description, according to the seal structure of the floor opening body according to the present invention, an arm portion is provided at the lower end of one of the frame pieces of the mutually adjacent lid bodies that face each other, and this arm portion Since the airtight material is attached to the top surface, the sealing effect is achieved not only between the outer frame and the lid, but also in the areas where the lids come into contact with each other, completely sealing the space between the inside and outside of the floor opening. Can be shielded.

Furthermore, since the arms are made of hard synthetic resin, they are elastic by themselves, so if a load that causes excessive deflection of the airtight material is applied, the arms themselves will flex to create an airtight seal. Excessive bending of the material can be prevented.

Therefore, it effectively prevents the deterioration of the airtight material,
The sealing effect can be exhibited over a long period of time.

[Brief explanation of the drawing]

Figure 1 is a plan view showing a part of a wiring or piping pit to which the seal structure according to this invention is applied;
3 is a sectional view taken along the line -- in FIG. 1, FIG. 3 is a sectional view taken along the line -- in FIG. 2, and FIG. 4 is a partial sectional view showing details of the arm portion. 1...Floor surface, 2...Floor opening, 4...Outer frame, 5...
... Lid body, 7 ... Inward flange portion, 8 ... Sealing material, 11 ... Frame body, 14 ... Arm portion, 15 ... Airtight material.

Claims (1)

[Scope of claim for utility model registration] An outer frame is attached to the opening edge of a floor opening opened in the floor surface, and a plurality of lid bodies are removably fitted into this outer frame to open and close the floor opening. In the floor opening body, an inward flange portion that protrudes inward is formed at the lower end of the outer frame, and the upper surface of this inward flange portion is formed under the frame body of each lid body when the lid is closed. A sealing material is provided in close contact with the end surface, and a hard synthetic resin member is provided at the lower end of one of the opposing frame pieces of the mutually adjacent lids and protrudes below the other frame piece. 1. A sealing structure for a floor opening, characterized in that an arm is attached to the arm, and an airtight material is provided on the upper surface of the arm in close contact with the lower end surface of the other frame piece.