JPH11172711A - Synthetic resin manhole - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a synthetic resin manhole which is light in weight, easy in handling and simple in assembly and installation by providing a plurality of split manhole wall bodies formed of a synthetic resin, forming the highest opening wall body in an expandable manner, connecting manhole wall bodies to each other by a joint in a rotateable-locking manner, and stacking them. SOLUTION: An opening wall body 6 comprising a manhole opening nozzle 4 to cover an upper opening 3 by a manhole lid 2 and a cylindrical manhole wall body 5, is provided. Manhole wall bodies 8, 8... are stacked on and joined with each other in a rotatable-locking manner through a joint 7 on a lower part of the opening wall body 6, and an invert 9 is joined with a lower part of a lowest manhole wall body 8. The manhole lid 2, the opening wall body 6, the joint 7, the manhole wall body 8, etc., the all formed of a synthetic resin. An outer circumferential surface of the manhole opening nozzle 4 is slidable with an inner circumferential surface of the manhole wall body 5, the opening wall body 6 is expandable as a whole, and the opening nozzle 4 is fixed to the manhole wall body 5 at an arbitrary position.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure in which a plurality of divided manhole walls are connected to each other to form a manhole.

[0002]

2. Description of the Related Art Conventionally, when constructing a manhole, a plurality of manhole walls are made of a concrete manhole such as a sloping wall, a straight wall, a pipe mounting wall, and a bottom wall. It consists of a wall split,
The outer peripheral surfaces of these divided bodies are respectively fastened by metal fasteners to form a manhole as a whole, and this manhole is installed in a suitably drilled hole.

[0003]

In the above-mentioned conventional technique, each manhole wall is made of concrete, is heavy and is not easy to handle, and is made of metal with respect to the nut embedded in the body. It is difficult to match the bolt holes provided in the binding plate, and the positioning of the binding plate is troublesome, and since the binding plate is made of metal, it is easily corroded, so that sufficient binding for a long time cannot be expected. There is a problem that the height position adjustment between the manhole and the ground is troublesome when burial is performed.

The present invention has been made in view of the above-mentioned problems of the prior art, and has as its object to provide a light-weight, easy-to-handle, easy-to-assemble, and easy-to-install composite device. It is intended to provide a resin manhole.

[0005]

In order to achieve the above object, a synthetic resin manhole according to the present invention has a manhole wall made of synthetic resin, and an opening wall arranged at the uppermost portion is expanded and contracted. The present invention is characterized in that the manhole walls are stacked together by connecting the respective manhole walls in a rotationally locked manner by joint joints.

Further, a plurality of reinforcing rib / branch tube accommodating portions are formed on the outer peripheral surface of each of the manhole walls at intervals.

Further, a ladder mounting bracket is formed on the inner surface of each of the manhole walls by integral molding with the wall.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. In the figure, 1
Is a manhole. The manhole 1 has an opening wall composed of a manhole opening nozzle 4 having an opening 3 covered with a manhole cover 2 on the upper surface and a cylindrical manhole wall 5. 6
It has.

The manhole 1 has manhole walls 8, 8... Which are stacked and joined via a joint 7 below the opening wall 6 in the up-down direction. Below the manhole wall 8, an invert 9 is joined. And these manholes that make up manhole 1
Cover 2, opening wall 6, joint 7, manhole wall 8
Invert 9 and the like are all made of synthetic resin.

The invert 9 is shown in FIGS. 1 to 4. The invert 9 is provided at its lower part with introduction paths 11, 11,... From a sewage introduction pipe connecting pipes 10, 10,. (Not shown), and a water reservoir 13 having a sewage discharge passage 12 connected thereto, and T-shaped engaging grooves 14, 14,... For connecting the manhole wall 8 at the upper inner peripheral edge, and Handles 15 are provided on the outer peripheral edge.

The joint 7 is shown in FIGS. 1, 2, 5, 6 and 9 and is used for connecting a manhole wall 8 from its upper end to its lower end. Are provided with T-shaped engaging grooves 16, 16.
7 and 17 are provided. The joint 7 is formed in a cylindrical shape as a whole, and has two diameters, large and small.

The manhole wall 8 is shown in FIGS. 1, 2, 7, 8 and 9, and has a substantially cylindrical shape having steps at upper and lower portions. The opening 18 at one end is smaller in diameter than the opening 19 at the other end, and a plurality of projections 20, 20,... Are formed.

The opening wall 6 is shown in FIGS. 1, 2, 10, 11 and 12, and as described above,
The nozzle comprises an opening nozzle 4 and a cylindrical manhole wall 5, and the outer peripheral surface of the manhole opening nozzle 4 is slidable on the inner peripheral surface of the manhole wall 5. 6 as a whole is extendable and contractible, and the opening nozzle 4 with respect to the manhole wall 5 is fixed at an arbitrary position by a wedge or the like. A plurality of projections 22 for holding the manhole cover 2 are provided at the upper end opening 3 of the manhole opening nozzle 4.
Are formed on the inner peripheral edge of the lower end opening 23 of the manhole wall 5, and T-shaped engaging grooves 24, 24 ... for connecting the manhole wall 8 are provided. Handle 2
5, 25 are provided.

Since the manhole made of synthetic resin having the above-described structure is assembled, for example, the manhole wall 8 is arranged above the invert 9 with the large-diameter portion facing down. Then, while lowering the manhole wall 8, the projection 21 formed on the manhole wall 8 is engaged with the engagement groove 14 formed on the inverter 9, and the inverter 9 is rotated by the handle 15. Then, the projection 21 is locked in the engagement groove 14 and the invert 9
And the manhole wall 8 are integrated.

Next, the manhole walls 8, 8 are connected via a joint 7. The upper end of the manhole wall 8 connected to the inverter 9 has a small diameter portion. Therefore, the manhole wall body 8 to be connected above is disposed with the small diameter portion facing downward. Then, with the adhesive applied to the contact surface of each projection 20, first, the lower manhole wall 8 is placed.
The small-diameter joint 7 is fitted thereon so that the projection 20 fits into the engagement groove 16, and then the upper manhole wall 8 is fitted so that the projection 20 fits in the engagement groove 16, and Projections 20 and 20 of the manhole wall 8
Are brought into contact with each other, and in this state, the joint 7 is rotated by the handle 17 to connect the two manhole walls in a rotation lock manner by the joint.

[0016] By the means as described above, the man phones are sequentially
Are connected via the joint 7. When the connecting portion of the manhole wall 8 is a small-diameter portion, the small-diameter joint 7 is used, and when the connecting portion is a large-diameter portion, If a large-diameter joint 7 is used, all the manhole walls 8 can have the same shape.

In order to connect the uppermost manhole wall 8 and the opening wall 6, the projections 20, 20,... Of the uppermost manhole wall 8 are connected to the manhole of the opening wall 6. The opening wall 6 is lowered toward the manhole wall 8 so as to fit into the engagement grooves 24 formed in the wall 5, respectively, so that the projections 20 and 24 are not in contact with each other. In this state, the opening wall 6 is rotated by the handle 25, and the two manhole walls 8,
Combine 5 In this connection, the two projections 2
An adhesive is applied to the contact surfaces 0 and 24, respectively.

When the manhole 1 is assembled in this manner, the manhole 1 is put into the hole 26 formed at an appropriate depth, and the upper surface of the manhole cover 2 at the uppermost end of the manhole 1 and the ground. Looking at the level of 27, the opening wall 6 is used for the manhole wall 5
Then, the manhole opening nozzle 4 is expanded and contracted to adjust the horizontality, and then the manhole opening nozzle 4 is fixed to the manhole wall 5.

On the outer peripheral surface of each of the manhole wall members 8, a plurality of U-shaped reinforcing rib / branch tube accommodating portions 28 are formed at intervals at a front view. Wall 8
Reinforcement and drainage branch pipe from the ground etc. (not shown)
Are joined to the appropriate reinforcing rib / branch tube accommodating portion 28. Therefore, the joint portion of the branch pipe to be bonded is prevented from being contaminated or corroded from the outside by the reinforcing rib / branch pipe housing portion 28.

A ladder mounting bracket 29 is formed on the inner surface of each of the manhole walls 8 by integral molding with the wall body 8, and the ladder 30 is assembled after the manhole 1 is assembled.
Can be easily attached.

[0021]

According to the present invention, the manhole wall is made of a synthetic resin, the opening wall disposed at the top is made expandable and contractable, and the mutual manhole walls are made of a rotation lock type by a joint joint. Combined and piled up the manhole wall,
A synthetic resin manhole that is lightweight, easy to handle, easy and reliable to assemble, and easy to adjust the height between the manhole and the ground when the manhole is buried.

When a plurality of reinforcing rib / branch tube accommodating portions are formed on the outer peripheral surface of each manhole wall at intervals, the manhole wall has sufficient strength, and The tube is reliably protected, resulting in a tough synthetic resin manhole.

When a bracket for attaching a ladder is formed integrally with the inner wall of each manhole wall by integral molding with the wall, a synthetic resin manhole is extremely easy to attach the ladder to the inside of the manhole. ―

[Brief description of the drawings]

FIG. 1 is a front view of each member before assembling a synthetic resin manhole according to the present invention.

FIG. 2 is an explanatory view showing an installation state of a synthetic resin manhole according to the present invention.

FIG. 3 is a plan view of one embodiment of an inverter.

FIG. 4 is a sectional view taken along line AA of FIG. 3;

FIG. 5 is a plan view of one embodiment of a joint.

FIG. 6 is a sectional view taken along the line BB of FIG. 5;

FIG. 7 is a plan view of one embodiment of a manhole wall.

FIG. 8 is a sectional view taken along the line CC of FIG. 7;

FIG. 9 is an explanatory view in which upper and lower manhole walls are connected by a joint.

FIG. 10 is a plan view of an embodiment of an opening wall body.

FIG. 11 is a bottom view of the same.

FIG. 12 is a sectional view taken along line DD of FIG. 10;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Manhole 6 Open wall 7 Joint 8 Divided manhole wall 28 Reinforcement rib and branch pipe storage part 29 Bradder mounting bracket

Claims (3)

[Claims] 1. A manhole comprising a plurality of divided manhole walls joined to each other to form a manhole, wherein the manhole wall is made of a synthetic resin, and an opening wall disposed at an uppermost portion is provided. The body can be expanded and contracted, and the walls of the manholes are connected to each other in a rotationally locked manner by joint joints.
Of synthetic resin, characterized by stacking the walls
Le. 2. The synthetic resin manhole according to claim 1, wherein a plurality of reinforcing rib / branch tube accommodating portions are formed on an outer peripheral surface of each of the manhole wall bodies at intervals. 3. A synthetic resin manhole according to claim 1, wherein a ladder mounting bracket is formed integrally with the inner wall of each of the manhole walls. .