JP2623442B2 - How to use the manhole cover height adjustment device for septic tanks - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of using a manhole cover height adjusting device for a septic tank.

[0002]

2. Description of the Related Art Generally, in an area without public sewerage facilities, wastewater discharged from houses and factories must not be discharged into public waters unless it is purified. Therefore, a septic tank is required, but a general septic tank is composed of a septic tank, an oxidizing tank, and a disinfecting tank. It liquefies and partially gasifies. The liquefied part is digested and decomposed by aerobic microorganisms in the oxidation tank,
The treated wastewater is finally disinfected in a disinfection tank and discharged into public waters.

[0003] Such septic tanks are buried in residential land and the like,
This septic tank requires multiple manholes because maintenance, cleaning and inspection are compulsory. In order to prevent rainwater from infiltrating into the septic tank main body, the manhole cover is set to a predetermined height above the ground surface, for example, about 30 cm, or deep when the septic tank main body is buried deeply (in Osaka, the manhole cover is 20 cm below the ground surface). Or even buried in the warehouse, flush with the ground surface.

By the way, if a septic tank is buried in the septic tank embedding hole after excavating a septic tank embedding hole having a predetermined depth, it is difficult to determine the height of the manhole cover. Therefore, in order to absorb the error between the septic tank embedding hole and the septic tank body, a proposal has been made in which the manhole cover mounting frame is slidable up and down with respect to the upper opening of the septic tank body (Japanese Utility Model Publication No. 56-31352). reference).

However, in the proposed manhole cover height adjusting device, in order to increase the height adjustment amount, it is necessary to lengthen the manhole cover mounting frame in the axial direction. Since the part also needs a large rising part, the height adjustment amount can be large,
There is a problem that it is not possible to meet the demand for lowering the position of the manhole cover from the rising portion.

[0006]

SUMMARY OF THE INVENTION Accordingly, the present invention has been made to solve such a problem, and the gist of the present invention is that a main body having a flange at a lower end detachably provided on an upper surface of a septic tank. A rising frame, a male-female spiral cylinder detachably provided on the main-body-side rising frame, a manhole lid mounting frame removably provided at an upper end of the male-female spiral cylinder, and a manhole removably provided on the manhole lid mounting frame. A lid,
In the underground buried septic tank consisting of, the female spiral cylinder above the male female spiral cylinder, in order to provide a spiral groove on the entire inner circumference, and the lower male spiral cylinder above the outer peripheral surface In order to provide approximately two spiral ridges, and to provide a plurality of horizontal cutting guide grooves of a slight depth below the outer peripheral surface other than the spiral ridges, each of the raw PVC pipes is placed in a mold. low pressure·
Blow molding by low temperature, expanding and molding, and moreover,
In using the height adjustment device of the septic tank manhole cover, which can be joined to the main body side rising frame and the manhole cover mounting frame with the same diameter, the main body side rising frame, the male and female spiral cylinder, the manhole cover mounting frame The method of adjusting the height of the manhole cover by screwing the male and female spiral cylinders back and forth, or using the main body-side rising frame and the male spiral cylinder horizontally cut from the male spiral cylinder below the male and female spiral cylinder A method of adjusting the height of the manhole cover, or, using the main body side rising frame, a manhole cover mounting frame, and a method of reducing the height of the manhole cover by not using a male and female spiral cylinder, And a method of using a height adjustment device for a septic tank manhole cover installed in a general household, characterized in that any one of the above can be selected.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is an overall exploded side view of an apparatus manufactured according to an embodiment of the present invention, and FIG. 2 is an explanatory view of use of the present embodiment.

The septic tank of this embodiment is made of a thick PVC plate by blow molding, and is suitable for a so-called combined treatment septic tank for purifying wastewater from household toilets and household wastewater collectively. . Further, in this septic tank, a filter bed contact aeration method in which anaerobic microorganisms inhabit is employed for the treatment. The septic tank is provided with four manholes, and these manholes are designed to withstand a static load of a vehicle or the like.

In the above-described manhole (diameter of about 450 mmφ or 500 mmφ) of the septic tank main body 1, a manhole cover 2 is provided on the following height adjusting device. In FIG. 1, a body-side rising frame 4 having a flange 3 at a lower end thereof is attached to an upper surface of a septic tank body 1 with a plurality of bolts (not shown, the same applies hereinafter). The main body-side rising frame 4 has a height of about 110 mm and is made by blow molding of PVC. At the upper end of the main body side rising frame 4, a mounting flange 5 bent inward is formed.
Is provided with a bolt hole 6 for inserting a bolt.

The body-side rising frame 4 has an axial length of about 180.
A pair of male and female spiral cylinders 7 mm and about 170 mm are screwed and mounted, and removably attached by bolts. The male / female spiral cylinder 7 is usually called an adjuster, and rotates the upper female spiral cylinder 7b to advance and retreat.
The height of the manhole cover 2 is adjusted.

The male / female spiral cylinder 7 is manufactured as follows. At the lower end of the lower male helical cylinder 7a, a mounting flange 8 bent inward is formed, and the mounting flange 8 is further bent downward to form a fitting foot 9.
The mounting flange 8 is provided with a plurality of bolt holes 10 into which bolts are inserted. Then, the fitting foot 9 is fitted inside the mounting flange 5 of the main body side rising frame 4, and the two mounting flanges 5, 8 are joined and detachably fastened by bolts.

The lower male spiral cylinder 7a is provided with two (or three) spiral ridges 11 above the outer peripheral surface, and the spiral ridge 11 and the mounting flange 8 are connected to each other. A plurality of horizontal cutting guide cylinders 12, 12,... Having a slight depth toward the inside at a pitch of 25 mm are provided therebetween. The lower male spiral cylinder 7a is cut horizontally by a cutter along the horizontal cutting guide cylinder 12.

The upper female spiral cylinder 7b is provided with a spiral groove 13 over the entire inner circumference, and an upper end thereof is formed with a mounting flange 14 bent inward. A plurality of bolt holes (not shown) to be inserted are provided.

The lower male spiral cylinder 7a and the upper female spiral cylinder 7b as described above are each made of a PVC original tube (not shown).
Into a mold for blow molding, heated to about 150 ° C. or less, and expanded by blow molding at an air pressure of 10 kg / cm ² or less to produce one piece.

A manhole cover mounting frame 15 is mounted on the male and female spiral cylinder 7 as described above, and is removably fastened by bolts. The manhole cover mounting frame 15 is formed by injection molding of PP resin, and the mounting flange 14 of the upper female spiral cylinder 7b is joined to a fitting groove 18 formed by an outer ring 16 and an inner ring 17. And detachably fasten with bolts. The manhole cover 2 is placed on the upper surface of the manhole cover mounting frame 15, and is removably fastened by bolts.

Next, a method of using the height adjusting device of the manhole cover 2 of the present embodiment will be described. First, a normal usage method will be described. The septic tank main body 1 is suspended from a predetermined septic tank embedding hole with a crane or the like, and is installed on the upper surface of the septic tank main body 1. The male / female spiral cylinder 7 is attached to the body-side rising frame 4, and the manhole cover attachment frame 15 is attached thereon. The septic tank main body 1 assembled as described above is placed in the septic tank embedding hole. And
The male / female spiral cylinder 7 is advanced and retracted in the state as shown in FIG. 1, and the height of the manhole cover 2 is adjusted so that the manhole lid 2 is adjusted to be higher or deeper on the ground surface.

Next, when the male and female spiral cylinder 7 is not used, as shown by an arrow A in FIG.
The manhole cover mounting frame 15 is mounted. By the way, since the main body-side rising frame 4 and the manhole cover mounting frame 15 can be joined with the same diameter, the mounting flange 5 of the main body-side rising frame 4 and the fitting groove 18 of the manhole cover mounting frame 15 are mounted with bolts. .

Next, when only the lower male spiral cylinder 7a is used, the lower male spiral cylinder 7a
Is removed, and cut along a predetermined horizontal cutting guide groove 12 by a cutter. Therefore, as shown by an arrow B1 in FIG.
The cut lower male spiral tube 7a is attached to the main body side rising frame 4, and then the manhole cover attaching frame 15 is attached to the upper end of the male spiral tube 7a as shown by an arrow B2 in FIG. In this case, the lower male spiral cylinder 7a and the manhole cover mounting frame 15 are fixed by embedding concrete that is driven into the periphery thereof. In the manhole of the present invention, a manhole cover mounting frame 15 may be used instead of the main body side rising frame 4.

[0019]

According to the present invention, the upper female spiral cylinder is provided with a spiral groove on the entire inner peripheral surface.
In order to provide about 2 spiral ridges above the outer peripheral surface, and a horizontal cutting guide groove with a slight depth on the other outer peripheral surface, the original PVC pipe was blow molded, so using an inexpensive PVC pipe, These uneven strips and the shape of the guide groove can be manufactured by molding one by one, and together with the low production cost by blow molding, it is possible to provide an inexpensive height adjusting device, which is convenient for a septic tank used for ordinary households, It can contribute to its spread. Since a horizontal cutting guide groove with a slight depth is provided in the lower male spiral cylinder, if it is cut horizontally along this, the manhole cover will be located at a position lower than the height of the contracted male female spiral cylinder, of course, Even if a horizontal cutting guide groove having a depth of is provided, there is no problem in screwing with the female spiral cylinder, and the horizontal state of the manhole cover can be accurately made. In particular, the height adjustment of the manhole cover of the present invention can be diversified by appropriately using a method such as advancing and retreating the male and female spiral cylinder, horizontal cutting of the male spiral cylinder, and disuse of the male and female spiral cylinder. .

[Brief description of the drawings]

FIG. 1 is an overall exploded side view of an apparatus manufactured according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram of use of FIG. 1;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Septic tank main body, 2 ... Manhole cover, 7 ... Male female spiral cylinder, 7a ... Male spiral cylinder, 7b ... Female spiral cylinder, 11 ... Spiral convex, 12 ... Horizontal cutting guide groove, 13 ... Spiral concave, 15 ...
Manhole cover mounting frame

Claims (1)

(57) [Claims] 1. A lower end detachably provided on an upper surface of a septic tank.
Body-side rising frame having a flange, and body-side rising frame
A male-female spiral cylinder detachably provided on the frame, and a manhole cover mounting frame removably provided on the upper end of the male-female spiral cylinder,
A manhole cover provided detachably to the manhole cover mounting frame, made In the underground for septic tank from above the female spiral sleeve of the male-female helical tube, for providing a spiral concave to the inner peripheral entire, Further, the lower male spiral cylinder is provided with approximately two spiral convexes above the outer peripheral surface thereof, and a plurality of horizontal cutting guide grooves having a slight depth below the outer peripheral surface other than the spiral convexes. It provided for the respective PVC raw material pipe, molded by expanded by blow molding by low pressure and low temperature and put in a mold, moreover, and said body-side rising frame and manhole cover mounting frame
The height of the manhole cover for septic tanks that can be joined with the same diameter
In using the adjusting device, the main body side rising frame, the male and female spiral cylinder, the manhole
The male and female helical cylinders are screwed back and forth using the lid
Method of adjusting the height of the hole cover, or the main body side rising frame and the male screw below the male and female spiral cylinder
Manhole using male spiral cylinder with horizontal cut of cylinder
The method of adjusting the height of the lid, or using the main body side rising frame and the manhole lid mounting frame
And manhole cover without using male and female spiral cylinder
General method characterized in that any one of the following methods can be selected:
Of manhole cover height adjustment device for septic tank installed at home
how to use.