JP3680750B2 - Support tool for opening manholes such as septic tanks - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a support tool for opening a manhole such as a septic tank, and mainly in cleaning of a septic tank in a general household, an accident occurs with the safety of the lid opened when the manhole cover is opened. It aims at providing the tool which can be prevented.
[0002]
[Prior art]
Ordinary household septic tanks are equipped with manholes, and when cleaning the inside of the tank using this manhole, the lid of the manhole is opened and a cleaning hose is inserted through the opened mouth to clean the inside of the tank. The lid that was opened is shifted from the mouth of the manhole and placed in the vicinity. In addition, the worker may leave the place for other purposes while cleaning the tank.
[0003]
[Problems to be solved by the invention]
However, in the cleaning of the septic tank, when a worker leaves the place for other purposes, if a person other than a child or an operator enters the septic tank and steps on or moves the manhole cover, There is a danger that the lid may slip or slide off.
[0004]
[Means for Solving the Problems]
The present invention is provided to solve the above conventional problems.
[0005]
The present invention provides a support tool for opening a manhole in a septic tank or the like, forming a mounting port on a lid and a manhole port edge in a direction opposite to each other while maintaining a predetermined distance above and below the mounting body. An adjustment tool for adjusting the height of the attachment port is provided on the upper jaw part of the attachment port of the lid, and a cam mechanism is provided on the lower jaw part for ensuring the lid tightening force in the attachment port.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
In the above-described means, when cleaning the septic tank, first, the cover of the septic tank is opened, and the lower mounting port of the first fixture body is fitted into the opening edge of the manhole. Then, insert the outer peripheral edge of the lid into the upper mounting opening, and then attach the second fixture body to the opening of the manhole at a position less than a half of the manhole. Plug in. Finally, after attaching the third fixture body to a position slightly beyond the half circumference of the manhole, the outer peripheral edge of the lid is inserted and supported at three points.
As a result, a space is formed between the manhole opening and the lid, and the cleaning hose is inserted into the manhole using this space.
After the cleaning operation is completed, the lid closing sequence is performed in the reverse order of the lid opening support sequence.
[0007]
【Example】
Examples of the present invention will be described below. Reference numeral 1 denotes a metal or hard plastic fixture main body, which has a predetermined distance L at the top and bottom thereof , has a space S that allows the washing hose H to be taken in and out , and is attached to the lid B in the opposite direction. 2 and the attachment port 3 to the manhole rim M ₁ are formed.
The length R ′ of the upper mounting port 2 in the substantially diametrical direction when the lower mounting ports 3 of the two mounting tool bodies are mounted in the approximately diametrical direction of the manhole rim M ₁ is determined as “gap G It is desirable to set the length to be longer by “× 2”.
[0008]
4 is a threaded adjuster for adjusting the height C of the upper mounting hole 2 of the fitting body, is provided on the upper jaw 2 _1.
5 is a cam mechanism provided in a portion of the upper mounting opening 2 of the lower jaw 2 _2, the illustrated example is shown that the cam lever 5 ₂ to the cam roller 5 ₁ of the combined eccentric is coupled with the rotation shaft 6 ing.
[0009]
[Specific use examples]
A specific use example according to the present invention will be described. In the cleaning of septic tanks A, first, open the lid B septic tank, Prefer fitting the lower attachment hole 3 of the fitting body of the drilled 1 th to the rim M ₁ manhole. Then, the outer peripheral edge B ₁ of the lid Plug thereon mounting opening 2, based on the Re this next two eyes of the fitting body 1 to the mouth rim M ₁ manhole in half following the position of the manhole Attach and insert the outer periphery B ₁ of the lid B into this. Finally, after attaching the rim M ₁ manhole the fitting body 1 of 3 th at a position beyond some a half manhole, plug the outer peripheral edge B ₁ of the lid, the cam lever 5 ₂ of the fitting body When pushed down, the lid is supported at three points.
As a result, a space S is formed between the manhole opening surface and the lid B, and the cleaning hose H is inserted into the manhole M using this space.
[0010]
In this case, since the mounting the two fitting body 1 attached to the manhole opening edge M ₁ in substantial major arc angle half (180 degrees) or more with respect to the horizontal insertion direction of the lid B insertion of the lid is difficult 4 may be set to an angle θ around the half circumference, but when the lower mounting ports 3 of the two mounting tool bodies are mounted in the substantially diametric direction of the manhole rim M ₁ , The length R ′ can be set in a range longer than the diameter R of the lid by “gap G × 2”.
[0011]
When the cleaning operation is finished and the lid is closed, the order of opening the lid is substantially reversed. That is, sampling the first hose H from the manhole, and then after removing the lid B releasing the three-point support by tightening the cam lever 5 ₁ of the pulling of the cam mechanism 5 of the fitting body 1 from the upper attachment port 2, a manhole opening edge The three fixture main bodies 1 attached to M ₁ are removed, and finally, the lid B is fitted on the manhole opening surface and closed.
[0012]
【The invention's effect】
Since the present invention has the above configuration, the following effects are obtained. That is, in a support tool for opening a manhole in a septic tank or the like, mainly when cleaning a septic tank in a general household, the lid opened when the manhole cover is opened and the work can be connected to the manhole opening edge. Therefore, it is possible to prevent mischief by persons other than children and workers, or prevent accidents due to slippage of the lid caused by stepping on the lid and the like by unauthorized entry, thereby ensuring work safety.
[Brief description of the drawings]
FIG. 1 is a front view showing a usage state of an opening support tool in a manhole such as a septic tank according to the present invention.
FIG. 2 is a side view of FIG.
FIG. 3 is a plan view of FIG. 1 with a lid removed. FIG. 4 is a plan view of a state in which the opened lid is mounted and supported on the septic tank side directly above the manhole by the fixture body.

Claims (1)

Holds a predetermined distance (L) above and below the fixture body (1), and forms the attachment port (2) of the lid (B) and the attachment port (3) to the manhole edge (M ₁ ) in the opposite direction. In addition, an adjustment tool (4) for adjusting the height (C) of the attachment port is provided on the upper jaw (2 ₁ ) of the attachment port of the lid, and the lid tightening force in the attachment port is applied to the lower jaw (2 ₂ ). A support tool for opening a manhole in a septic tank or the like, characterized in that a cam mechanism (5) is provided for securing.

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