JP3073187U - manhole - Google Patents

Abstract

(57) [Summary] [Problem] To provide a lightweight and rigid manhole. SOLUTION: The outer peripheral surface of a synthetic resin manhole excluding a connection portion with a connection pipe is coated with concrete or mortar cement with a thickness of about 3 cm to 7 cm.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a manhole to be buried in an appropriate place in a common ditch or sewer.

[0002]

[Prior art]

 Conventional manholes are mainly made of concrete, but in recent years, manholes made of synthetic resin have been commercially available.

[0003]

[Problems to be solved by the invention]

 Concrete products are inexpensive and have excellent strength, but they have problems such as poor workability and inconvenience in transportation due to their large weight relative to the volume ratio. On the other hand, although synthetic resin is lightweight and easy to handle, there is a problem that the construction place is limited due to poor rigidity and that it is unsuitable for use with a large volume. The present invention does not solve the above problems.

[0004]

[Means for Solving the Problems]

 The present invention is characterized in that an outer peripheral surface of a synthetic resin manhole except for a connecting portion with a connecting pipe is coated with concrete or mortar cement with a thickness of about 3 cm to 7 cm. At this time, the synthetic resin manhole has a thickness of about 3 mm to 10 mm, and a flange piece such as an inverted L-shaped and / or an inverted U-shaped cross section is formed at a connecting portion.

[0005]

[Embodiment of the invention]

 FIG. 1 is a cross-sectional view of a manhole product 1 as an example of the present invention, wherein 1a is a manhole formed of a synthetic resin molded product, and 1b is concrete coated on the outer peripheral surface thereof. In the present invention, as described above, the outer periphery of the synthetic resin product is driven into concrete and covered with concrete, and its thickness is about 3 cm to 7 cm.

In the present invention, although the thickness of the synthetic resin molded product 1a inside can be arbitrarily designed, the thickness is about 5 mm to 15 mm from various experimental results of the present inventors. The above description is directed to a manhole having a volume of 15 liters to 250 liters. In this case, an edge portion forming a connection portion of the synthetic resin molded product 1a is formed in a cross section of an inverted L shape or an inverted U shape. Are formed on the flange piece p, etc., and these are used alone or mixed.

FIG. 2 shows a manufacturing example of the present invention. FIG. 3 is a cross-sectional explanatory view showing a state in which concrete is cast on the outer peripheral surface of the synthetic resin molded product 1a. On the other hand, a circular or rectangular frame 3 having a fixed interval t is attached to the outer periphery thereof, and concrete 4 is poured from the open upper surface and hardened. . At this time, mortar cement may be used instead of the concrete 4.

FIG. 3 is a view showing the use state of the product 1 of the present invention in which the frame 3 and the base 2 have been removed after curing. That is, the connection with the connection pipe 6 is established. At this time, the packing material 5 is brought into contact with the synthetic resin side on the inner surface side, which maintains a high degree of confidentiality and provides excellent sealing properties at the joint.

[0009]

[Effect of the invention]

 As described above, the manhole according to the present invention can be integrally manufactured at a factory by coating the outer peripheral surface of a synthetic resin molded product with concrete or mortar cement having a constant thickness. This eliminates the need for complicated work such as inverting the mortar after installing the manhole, and because the construction of a manhole made of plastic simply has a problem with the load resistance, the construction site is limited to residential areas. However, in the present invention, since the outer peripheral surface is covered with concrete and reinforced, it is possible to perform a wide range of construction without limiting the application place.

[0010] The following excellent functions and effects are exhibited. Since it can be made lighter (1/2 to 2/3 the weight) than conventional concrete products, construction work is easy and transportation is convenient. The connection of pipe fume pipes and the like becomes easy, and the use of the fitting packing method does not cause water leakage. The use of a glass-based material for the plastic material makes it resistant to chemicals such as chemicals. The adhesion rate of chemical substances and harmful substances in the manhole can be reduced. The manhole pattern can be changed, that is, the height, the type of invert, etc. can be appropriately combined.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of an example of the product of the present invention.

FIG. 2 is an explanatory view of a manufacturing state of the product of the present invention.

FIG. 3 is a diagram showing an embedded state of use.

[Explanation of symbols]

 1a Manhole molded product made of synthetic resin 1b Concrete covering material 2 Base 3 Frame 4 Concrete 5 Packing material 6 Connecting pipe

Claims (2)

[Utility model registration claims] 1. A manhole comprising a synthetic resin manhole covered with concrete or mortar cement with a thickness of approximately 3 cm to 7 cm on an outer peripheral surface of the manhole except for a connection portion with a connecting pipe. 2. The synthetic resin manhole has a thickness of approximately 3 m.
m to about 10 mm, and a flange portion having an inverted L-shaped cross section and / or an inverted U-shaped cross section is formed at a connection portion, and a thickness of approximately 3 cm to 7 cm with respect to an outer peripheral surface excluding a joint portion with a connection pipe. A manhole characterized by being coated with concrete or mortar cement.