KR102745276B1 - Manhole with wedge rubber connector and manufacturing method of this manhole - Google Patents

Abstract

A manhole having a wedge rubber connector and a method for manufacturing the manhole are disclosed. The disclosed manhole having a wedge rubber connector is characterized by including: a manhole body having an open upper portion and a sewage outlet formed on a lower side thereof into which a sewage main pipe is inserted and connected; a buried female screw having a female screw hole and installed buried in the sewage outlet; a wedge rubber connector interposed between the sewage main pipe and the sewage outlet and expanded by a wedge method to securely connect the sewage main pipe to the sewage outlet and achieve watertightness; and a push-actuating bar configured to penetrate the wedge rubber connector and be screw-connected to the buried female screw so that the wedge rubber connector is maintained in a connected state to the manhole body when the manhole body is transported, and to pressurize the wedge rubber connector when tightening so that the wedge rubber connector is expanded.

Description

Manhole with wedge rubber connector and manufacturing method of this manhole

The present invention relates to a manhole and a method for manufacturing the manhole, and more specifically, to a manhole having a wedge rubber connector capable of fixing a lower main pipe in a wedge manner, and a method for manufacturing the manhole.

In general, sewer pipes must ensure the straightness of the water pipes installed between sewer manholes to prevent accumulation of sewage sludge and facilitate removal. However, the connection port through which sewage flows and is connected to the water pipes at the manhole is configured as an integral part of the manhole at the bottom of the manhole. Therefore, when constructing sewer pipes, the pipe connectors of the sewer manholes on both sides where the water pipes are connected are aligned in a straight line (by turning the direction of the entire sewer manhole and aligning the pipe connectors in a straight line). Therefore, the sewer pipe installation is very difficult.

In particular, when multiple water pipes are routed in different directions through a single sewer manhole, the above method requires precise pipe design and construction, which leads to the problem of high construction costs and other costs (technology, manpower costs, etc.).

In order to solve this problem, in Patent Registration No. 10-1203690, the angle of the flow pipe of the pipe connecting body is adjusted while the angle of the clamping plate of the water pipe fixing body that clamps the water pipe is adjusted to clamp the water pipe. However, the pressure of the sewage discharged from the sewage manhole is high, so the sewage leaks into the flow groove of the sewage manhole to which the water pipe is connected, causing damage to the sewage manhole and the water pipe.

Accordingly, in registered patent No. 10-1512276, a structure of a sewer manhole is proposed that provides a connector and a packing body to receive and fix a water pipe, and a bolt body and a nut body are fastened to the outside of the packing body to promote expansion of the packing body, thereby securing the fixing force of the water pipe and completely sealing the gap between the sewer manhole and the water pipe.

However, in Patent Registration No. 10-1512276, the support and the pressurizing body on both sides of the packing body are connected by a bolt body and a nut body so that the packing body expands while becoming narrower. Therefore, before the packing body expands, the packing body is not structured to be connected and assembled to the manhole. Therefore, when constructing a manhole, the packing body, support body, pressurizing body, etc. must be transported to the construction site separately from the manhole, and the packing body, support body, pressurizing body, etc. must be individually inserted into the sewer pipe before construction, which makes the work of connecting the manhole and the sewer pipe inconvenient and incurs additional transportation costs.

In particular, although the gap between the sewer manhole and the water pipe can be sealed and fixed to a certain extent by expanding the packing body, since the packing body does not function as a member that connects the water pipe to the sewer manhole, separately from the construction for expanding the packing body, a fixing piece that forms a fixing hole to secure it to the sewer manhole through a fixing hole on the outside must be formed, and a connector that forms a fitting part that is inserted into the expansion groove on one side to pressurize the pressurizing body and a stepped part that is extended in steps so that the outer diameter that accommodates the water pipe is gradually narrowed must be additionally constructed, so that there are many and complicated construction steps and the construction takes a lot of time.

Registered Patent No. 10-1203690 Registered Patent No. 10-1512276

The present invention has been made to solve the above-mentioned conventional problems, and the purpose of the present invention is to provide a manhole equipped with a wedge rubber connector which not only improves watertightness by attaching a sewage main pipe to a sewage outlet of a manhole by a wedge method and making watertightness possible, but also enables very easy and sturdy construction and improves usability, and a method for manufacturing the manhole.

However, the purpose of the present invention is not limited thereto, and it goes without saying that purposes or effects that can be understood from the means for solving the problem or the embodiment thereof are also included herewith, even if not explicitly stated.

In order to achieve the above-described object, a manhole having a wedge rubber connector of the present invention comprises: a manhole body having an open upper portion and a sewage outlet formed on a lower side thereof into which a sewage main pipe is inserted and connected; a socket pipe having a step portion for forming an inner portion of the sewage outlet and into which a terminal portion of the lower main pipe is inserted and settled; a buried female screw having a female screw hole and being embedded in the sewage outlet; a wedge rubber connector interposed between the sewage main pipe and the sewage outlet and expanded in a wedge manner to fixally connect the sewage main pipe to the sewage outlet and achieve watertightness; It is characterized by including a push-actuating bar configured to penetrate the wedge rubber connector and be screw-connected to the embedded female screw so that the wedge rubber connector remains connected to the manhole body when the manhole body is transported, and pressurizes the wedge rubber connector when tightening so that the wedge rubber connector expands.

The above wedge rubber connector may be configured to include a coupling ring formed in a ring shape, into which the sewage main pipe is inserted into the inner surface, made of an elastic material, having a wedge groove formed in a cylindrical shape on the rear surface, and expanding inwardly and outwardly based on the wedge groove to secure the sewage main pipe to the sewage outlet and fill the gap to achieve watertightness; and a wedge ring disposed at the rear of the coupling ring and expanding to penetrate the wedge groove so that the coupling ring expands inwardly and outwardly.

It is preferable that the above coupling ring is made of EPDM (hylene propylene diene monomer) material, and the above wedge ring is made of synthetic resin material or metal material.

In addition, a method for manufacturing a manhole having a wedge rubber connector of the present invention is a method for manufacturing a manhole which is open at the top and has a sewage outlet formed at the lower side into which a sewage main pipe is inserted and connected, comprising the steps of: a) arranging floor formwork on the ground at a predetermined interval, turning over an inner formwork formed in a cup shape on the upper surface of the floor formwork and arranging an outer formwork formed of a pipe body which is open at the top and bottom so as to surround the outer side of the inner formwork, and arranging an outer formwork formed of a pipe body which is open at the top and bottom so as to surround the outer side of the inner formwork on the upper surface of the floor formwork; b) connecting and assembling a socket pipe and a tubular formwork, assembling a built-in female screw to the tubular formwork, and arranging an assembly in which the socket pipe, the tubular formwork, and the built-in female screw are assembled between the inner formwork and the outer formwork; c) a step of pouring concrete between the inner formwork and the outer formwork, and after the concrete has cured, removing the formwork, and manufacturing a manhole body in which the socket pipe is installed on the inner surface of the sewage outlet and the embedded female screw is embedded on the outer surface of the socket pipe; d) a step of inserting a wedge rubber connector into the inner surface of the sewage outlet, and assembling a push-action bar through the wedge rubber connector and screw-fastening it to the embedded female screw to connect and mount the wedge rubber connector to the manhole body.

According to the above, since the wedge rubber connector is assembled to be connected to the sewage outlet of the manhole body, the sewage main pipe is inserted through the wedge rubber connector, and the wedge rubber connector is expanded in a wedge manner so that the sewage main pipe is firmly connected to the sewage outlet of the manhole body, and watertightness can be improved, so that the convenience of transporting materials for construction is very excellent, while the convenience of construction is good, and the leakage of sewage is prevented, and the installation durability of the sewage main pipe is greatly improved, thereby improving the maintainability.

In addition, the various beneficial advantages and effects of the present invention are not limited to the above-described contents, and will be more easily understood in the process of explaining specific embodiments of the present invention.

FIG. 1 is a block diagram showing a method for manufacturing a manhole having a wedge rubber connector according to one embodiment of the present invention.
FIG. 2 is a drawing for explaining a method for manufacturing a manhole having a wedge rubber connector according to one embodiment of the present invention.
Figure 3 is a drawing for explaining the assembly process of the socket pipe, tubular formwork, and embedded female screw illustrated in Figure 2.
Figure 4 is a drawing showing the inverter as viewed from the side of the inner formwork of Figure 2.
Figure 5 is a drawing of the fixed rib shown in Figure 3 viewed from the side.
Figure 6 is a cross-sectional view showing a manhole body manufactured by the manhole manufacturing method of the present invention.
Figure 7 is a cross-sectional view showing a manhole body manufactured by the manhole manufacturing method of the present invention.
Figures 9 and 10 are drawings for explaining the process of assembling and mounting a wedge rubber connector on a manhole body to finally complete a manhole equipped with a wedge rubber connector of the present invention.
Figure 11 is an example of use in constructing a sewer pipe using a manhole manufactured by the manhole manufacturing method of the present invention.

The above objects, other objects, features and advantages of the present invention will be readily understood through the following preferred embodiments related to the attached drawings. However, the present invention is not limited to the embodiments described herein and may be embodied in other forms. Rather, the embodiments introduced herein are provided so that the disclosed contents can be thorough and complete and so that the spirit of the present invention can be sufficiently conveyed to those skilled in the art.

In this specification, when it is mentioned that a component is on another component, it means that it can be formed directly on the other component, or a third component can be interposed between them. Also, in the drawings, the thickness of the components is exaggerated for the effective explanation of the technical contents.

The embodiments described herein will be described with reference to cross-sectional and/or plan views, which are ideal examples of the present invention. In the drawings, the thicknesses of the films and regions are exaggerated for effective explanation of the technical contents. Accordingly, the shapes of the illustrations may be modified due to manufacturing techniques and/or tolerances. Accordingly, the embodiments of the present invention are not limited to the specific shapes illustrated, but also include changes in shapes created according to the manufacturing process. For example, the etched regions illustrated at right angles may be rounded or have a shape with a predetermined curvature. Accordingly, the regions illustrated in the drawings have properties, and the shapes of the regions illustrated in the drawings are intended to illustrate specific shapes of regions of the device and are not intended to limit the scope of the invention. Although the terms first, second, etc. have been used to describe various components in various embodiments of the present invention, these components should not be limited by these terms. These terms are only used to distinguish one component from another. The embodiments described and illustrated herein also include complementary embodiments thereof.

The terminology used herein is for the purpose of describing embodiments only and is not intended to limit the invention. In this specification, the singular also includes the plural unless specifically stated otherwise. The words "comprises" and/or "comprising" as used herein do not exclude the presence or addition of one or more other elements mentioned.

In describing the specific embodiments below, various specific contents have been written to explain the invention more specifically and to help understanding. However, a reader who has knowledge of this field enough to understand the present invention can recognize that it can be used without these various specific contents. In some cases, it is mentioned in advance that parts that are commonly known but not greatly related to the invention are not described in order to prevent confusion without any reason in describing the present invention.

Referring to FIGS. 1 to 11, a manhole equipped with a wedge rubber connector of the present invention and a method for manufacturing the same are described.

The manhole of the present invention is a concrete manhole made of concrete, and is formed in a barrel shape with an open upper portion to allow sewage to flow in, and is formed as a manhole with a sewage outlet (102) formed through the lower side to allow a sewage main pipe (p, see FIG. 11) to be inserted and connected to allow the sewage to flow out.

In addition, the manhole of the present invention is a manhole having a manhole inverter (103, see FIGS. 6 and 7) formed on the inner bottom surface (104). Here, the manhole inverter refers to a sewage guide groove formed on the bottom of the manhole to guide sewage toward the sewage outlet (102) so as to facilitate the flow of sewage in the manhole and prevent sedimentation of sediment, thereby preventing the generation of an unpleasant odor.

The method for manufacturing a manhole equipped with a wedge rubber connector of the present invention includes a formwork arrangement step (s10), an assembly (A) arrangement step (s20), concrete pouring, curing, and formwork separation step (s30), and a wedge rubber connector assembly step (s40).

The formwork placement step (s10) is configured to place formwork (10, 20, 30) for pouring concrete.

The formwork arrangement step (s10) is configured to arrange floor formwork (10) spaced apart at a predetermined interval on the ground, place an inner formwork (20) formed in a cup shape on the upper surface of the floor formwork (10) by turning it over, and place an outer formwork (30) formed as a tube body with the upper and lower sides open to surround the outer side of the inner formwork (20) on the upper surface of the floor formwork (10).

An H beam (12) can be formed at the bottom of the floor formwork (10) to support the floor formwork (10) at a predetermined interval relative to the ground.

The inner formwork (20) is configured so that the outer surface is inclined upward and downward at a predetermined angle so that the diameter decreases upward, thereby facilitating separation of the inner formwork (20) from the completed concrete manhole body (101).

In the present invention, the inner formwork (20) and the outer formwork (30) are made in a circular shape, and the manhole body (101) is made as a cylindrical manhole. However, this is not limited to this, and the inner formwork (20) and the outer formwork (30) may be made in a square shape, such as a square or pentagon, and may be made as a square manhole.

The assembly (A) placement step (s20) is configured to assemble a socket pipe (110), a tubular formwork (40), and a built-in female screw (120), and place the assembled assembly (A) in the formwork. Socket pipe (110)

In other words, the socket pipe (110) and the tubular formwork (40) are connected and assembled, and the embedded screw (120) is assembled to the tubular formwork (40), so that the assembly (A) in which the socket pipe (110), the tubular formwork (40), and the embedded screw (120) are assembled is arranged between the outer formwork (30) and the inner formwork (20).

Here, the socket pipe (110) and the tubular formwork (40) are connected to each other so as to be in communication with each other, the front end of the socket pipe (110) is in close contact with the upper end of the outer surface of the inner formwork (20), and the rear end of the tubular formwork (40) is in close contact with the upper end of the outer surface of the outer formwork (30), so that when concrete is poured between the outer formwork (30) and the inner formwork (20), the formwork functions to form a sewage outlet (102), and the socket pipe (110) is integrally mounted on the inner surface of the sewage outlet (102) of the manufactured manhole body (101) so that when the sewage main pipe (p) is constructed, the end of the sewage main pipe (p) is fitted and connected to perform a pipe connection function.

The tubular formwork (40) functions as a formwork for forming the outer side of the sewage outlet (102), and the socket pipe (110) is configured to function as a formwork for forming the inner side of the sewage outlet (102).

The socket pipe (110) is provided with a step portion (112) into which the end of the sewer main pipe (p) is inserted and fixed, and a plurality of catch projections (113) may be further configured on the upper part of the inner end of the socket pipe (110) to catch and fix the position on the upper side of the inner formwork (20).

At this time, the manhole of the present invention is a manhole in which a manhole inverter (103) is formed on the inner bottom surface, and in order to form this manhole inverter (103), an inverter forming part (22, see FIG. 4) for forming the manhole inverter (103) is formed to protrude upward on the upper surface of the inner formwork (20), and a plurality of catches (113) protruding from the rear end of the socket pipe (110) are installed to catch on the side end of the inverter forming part (22).

In addition, the inner end of the tubular formwork (40) is provided with a fitting part (41) that is inserted into and fitted into the outer end of the socket pipe (110), and the inner end circumference of the tubular formwork (40) is provided with a fixing projection (42) that is inserted into an assembly groove (123) formed at the end of a built-in female screw (120) so that the built-in female screw (120) is fixedly mounted to the inner end of the tubular formwork (40).

That is, in the present invention, the assembly of the assembly (A) can be connected and assembled by inserting and connecting the fitting part (41) of the tubular formwork (40) into the outer end of the socket tube (110) so that the tubular formwork (40) and the socket tube (110) can be connected and assembled, and the fixing projection (42) formed around the inner end of the tubular formwork (40) can be fixed and assembled by inserting and fixing the embedded female screw (120) into the assembly groove (123) of the embedded female screw (120) to the inner end of the tubular formwork (40), and the assembly (A) assembled in this way is placed between the outer formwork (30) and the inner formwork (20).

Meanwhile, as shown in FIGS. 3 and 5, a fixed rib (43) is provided on the outer end of the tubular formwork (40), and a fixed hole (43a) is formed in the center of the fixed rib (43). Accordingly, as shown in FIG. 2, a fastening means (b), such as a bolt or pin, is fastened through the outer formwork (30) to the fixed hole (43a) formed in the fixed rib (43) using a screw fastening method or a fitting method, so that the outer end of the tubular formwork (40) can be positioned and fixed in close contact with the inner surface of the outer formwork (30).

The concrete pouring, curing, and formwork separation step (s30) is configured to pour concrete between the inner formwork (20) and the outer formwork (30), and after the concrete has cured, the formwork is removed to manufacture the manhole body (101).

The formwork can be removed by separating and removing the inner formwork (20), the outer formwork (30), and the bottom formwork (10) when the concrete has cured, and then separating the tubular formwork (40), thereby completing the manhole body (101). In this way, the inner formwork (20), the outer formwork (30), the bottom formwork (10), and the tubular formwork (40) are separated and removed, and the manhole body (101) is manufactured to have a socket pipe (110) integrally connected to the inner surface of the sewage outlet (102), as shown in FIGS. 6 and 7, and a built-in female screw (120) is built into the manhole body (101) on the outside of the socket pipe (110). At this time, the end of the built-in female screw (120) is configured to be exposed on the inner surface of the sewage outlet (102).

Referring to FIGS. 8 to 10, the wedge rubber connector assembly step (s40) is configured to insert the push-actuating bar (140) into the wedge rubber connector (130) and screw the end of the push-actuating bar (140) into the embedded female screw (130) to install the wedge rubber connector (130) in the sewage outlet (102) of the manhole body (101).

The wedge rubber connector (130) includes a coupling ring (131) and a wedge ring (135).

The coupling ring (131) is formed in a ring shape and has a hollow portion, and is configured so that a sewer main pipe (P) can be inserted into the inner surface. The coupling ring (131) is formed of an elastic material, and a wedge groove (132) is formed in a cylindrical shape on the rear surface, and a first bar passage hole (133) through which a push-actuating bar (140) passes is formed on the inner end of the wedge groove (132).

The wedge ring (135) is formed in a ring shape, and is formed in a cone shape, i.e., a wedge shape, whose cross-section gradually decreases toward the coupling ring (131). When inserted into the wedge groove (132), the inner and outer sides of the coupling ring (131) are spread apart and expanded. In addition, the wedge ring (135) is formed with a second bar passage hole (136) through which the push-action bar (140) passes.

In the present invention, the coupling ring (131) is made of EPDM material (Ethylene Propylene Diene Methylene), and the wedge ring (135) is made of synthetic resin material or metal material, so that the wedge ring (135) can penetrate the wedge groove (132) of the coupling ring (131) and spread outward and inwardly of the coupling ring (131) to expand, and when the wedge ring (135) is moved back, the coupling ring (131) can be configured to return to its original state by its own elastic force.

However, the coupling ring (131) is not limited to EPDM material, and may be made of elastic synthetic resin materials such as various elastic rubber materials, and the wedge ring (135) may be made of various materials such as stone, wood, ceramic, etc. that are harder than the material of the coupling ring (131) as long as they have a hardness that penetrates the coupling ring (131) and allows the coupling ring (131) to open in a wedge manner, in addition to synthetic resin materials and metal materials.

The push-actuating bar (140) is made of a bolt having a predetermined length, and is screwed into the female screw thread (122) of the embedded female screw (120) at the end through the wedge rubber connector (130), and is configured so that when inserted, the bolt head (142) formed at the rear end presses the wedge rubber connector (130) to cause expansion deformation due to the wedge action of the wedge rubber connector.

Specifically, the push-actuating bar (140) is inserted through the second through-hole (136) of the wedge ring (135) and the first through-hole (132) of the coupling ring (131), and the end of the push-actuating bar (140) is screwed into the female screw thread (122) of the embedded female screw (120), thereby connecting the coupling ring (131) and the wedge ring (135) to the manhole body (101), thereby completing the manufacture of the manhole (100).

When the manhole (100) completed in this manner is transported to the construction site, the wedge rubber connector (130) including the coupling ring (131) and the wedge ring (135) is connected to the manhole body (101), so there is no need to transport the manhole body (101) and the wedge rubber connector (130) separately, making material transport very convenient.

In addition, as shown in Fig. 11, during on-site construction, the sewage main pipe (P) is sequentially inserted into the wedge ring (135) and the coupling ring (131), and then the end of the sewage main pipe (P) is tightly seated in the step portion (112) of the socket pipe (110), and then the push-action bar (140) is tightened, so that the bolt head (142) of the push-action bar pushes and rotates the wedge ring (135), and as the wedge ring (135) penetrates the wedge groove (132) of the coupling ring (131), the inner and outer sides of the coupling ring (131) are spread apart and expanded, and the coupling ring (131) presses the sewage main pipe (P) and the sewage outlet (102), so that the sewage main pipe (P) is fixedly connected to the sewage outlet (102), and the sewage main pipe (P) and the sewage outlet (102) are connected. The gap is filled to create a watertight seal.

In this way, the manhole (100) of the present invention is made by passing the sewage main pipe (P) through the wedge rubber connector (130) and inserting it into the socket pipe (110), and then tightening the push-action bar (140). As the wedge rubber connector (130) expands by the wedge action, not only is the sewage main pipe (P) firmly connected to the sewage outlet (102), but perfect watertightness is also achieved, thereby greatly improving the convenience of construction, while greatly improving the constructability and reducing the cost.

While the present invention has been illustrated and described with reference to preferred embodiments for illustrating the principles of the present invention, the present invention is not limited to the exact construction and operation as illustrated and described. Rather, it will be readily apparent to those skilled in the art that numerous changes and modifications can be made to the present invention without departing from the spirit and scope of the appended claims. Accordingly, all such appropriate changes and modifications and equivalents should also be considered to fall within the scope of the present invention.

P...sewer main
10...Floor Formwork
20...Inner formwork
30...Outer formwork
40...Tubular formwork
100...manhole
101...Manhole body
102...Sewage outlet
104...inverter
110...socket tube
120... Recessed female screw
130...Wedge rubber connector
131...Combination ring
135... wedge ring
140...Push action bar

Claims (4)

A manhole body (101) having an open top and a sewage outlet (102) formed on the lower side into which a sewage main pipe (P) is inserted and connected;
A socket pipe (110) having a step portion into which the end portion of the lower main pipe is inserted and fixed, forming the inner side of the sewage outlet;
A buried female screw (120) installed in the above sewage outlet and having a female screw hole;
A wedge rubber connector (130) interposed between the sewer main pipe and the sewer outlet and expanded in a wedge manner to securely connect the sewer main pipe to the sewer outlet and achieve watertightness;
It comprises a push-actuating bar (140) which is configured to be screw-connected to the embedded female screw by penetrating the wedge rubber connector with a bolt having a predetermined length, so that the wedge rubber connector is maintained in a state of being connected to the manhole body when the manhole body is transported, and pressurizes the wedge rubber connector when tightening so that the wedge rubber connector expands;
The above wedge rubber connector (140) is
A coupling ring (131) formed in a ring shape, into which the sewage main pipe is inserted into the inner surface, made of an elastic material, and having a cylindrical wedge groove (132) formed on the rear surface, and which expands inwardly and outwardly based on the wedge groove to secure the sewage main pipe to the sewage outlet and fill the gap to achieve watertightness;
A wedge ring (135) is disposed at the rear of the above coupling ring and penetrates the wedge groove to expand the coupling ring so that it spreads inwardly and outwardly;
The coupling ring (131) has a first bar passage hole (133) formed therein through which the push-actuating bar passes, and the wedge ring (135) has a second bar passage hole (136) formed therein through which the push-actuating bar passes, so that when the push-actuating bar (140) is inserted and passed through the second bar passage hole and the second bar passage hole and screwed into the embedded female screw and tightened, the bolt head (142) of the push-actuating bar pushes and advances the wedge ring (135), and as the wedge ring (135) penetrates into the wedge groove (132), the inner and outer sides of the coupling ring (131) spread apart and expand, so that the coupling ring (131) presses the lower main pipe (P) and the sewage outlet (102), so that the lower main pipe is fixedly connected to the lower outlet, and the lower main pipe and the lower outlet are connected to each other. A manhole having a wedge rubber connector characterized by being configured to fill a gap and achieve watertightness.
delete In paragraph 1,
A manhole equipped with a wedge rubber connector, characterized in that the above coupling ring (131) is made of EPDM (hylene propylene diene monomer) material and the above wedge ring (135) is made of synthetic resin material or metal material.
In a manhole manufacturing method for manufacturing a manhole in which a sewage outlet (102) is formed with an open upper portion and a sewage main pipe (P) inserted and connected to the lower portion of the side,
a) A step of arranging floor formwork (10) at a predetermined interval on the ground, placing an inner formwork (20) formed in a cup shape by turning it over on the upper surface of the floor formwork, and placing an outer formwork (30) formed of a tube that is open from top to bottom to surround the outer side of the inner formwork on the upper surface of the floor formwork;
b) a step of assembling a socket pipe (110) and a tubular formwork (40) by connecting them, assembling a built-in screw (120) to the tubular formwork, and placing an assembly in which the socket pipe (110), the tubular formwork (40), and the built-in screw (120) are assembled between the inner formwork (20) and the outer formwork (30);
c) A step of manufacturing a manhole body (101) in which concrete is poured between the inner formwork (20) and the outer formwork (30), and after the concrete has cured, the formwork is removed, the socket pipe (110) is installed on the inner surface of the sewage outlet (102), and the embedded female screw (120) is embedded and installed on the outside of the socket pipe;
d) a step of inserting a wedge rubber connector (130) into the inside of the sewage outlet (102), and connecting and mounting the wedge rubber connector (130) to the manhole body (101) by screwing a push-action bar (140) made of a bolt of a predetermined length through the wedge rubber connector (130) and assembling it into the embedded female screw (120);
The above wedge rubber connector (140) is
A coupling ring (131) formed in a ring shape, into which the sewage main pipe is inserted into the inner surface, made of an elastic material, and having a cylindrical wedge groove (132) formed on the rear surface, and which expands inwardly and outwardly based on the wedge groove to secure the sewage main pipe to the sewage outlet and fill the gap to achieve watertightness;
A wedge ring (135) is disposed at the rear of the above coupling ring and penetrates the wedge groove to expand the coupling ring so that it spreads inwardly and outwardly;
The coupling ring (131) has a first bar passage hole (133) formed through which the push-actuating bar passes, and the wedge ring (135) has a second bar passage hole (136) formed through which the push-actuating bar passes, so that when the push-actuating bar (140) is inserted and passed through the first bar passage hole (133) and the second bar passage hole (136) and screwed into the embedded female screw (120) and tightened, the bolt head (142) of the push-actuating bar pushes and advances the wedge ring (135), and as the wedge ring (135) penetrates into the wedge groove (132), the inner and outer sides of the coupling ring (131) are spread apart and expanded, so that the coupling ring (131) presses the lower main pipe (P) and the sewage outlet (102), so that the lower main pipe is connected to the A method for manufacturing a manhole having a wedge rubber connector, characterized in that it is fixedly connected to a lower outlet and configured to fill the gap between the lower main pipe and the lower outlet to achieve watertightness.

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