JP2000297460A - Cover for cleaning opening of pipe passage and cleaning opening - Google Patents

Abstract

PROBLEM TO BE SOLVED: To contrive the improvement of execution and load resistant characteristics by forming the cover of a saturated polyester resin, modified α-olefin copolymer rubber grafted by unsaturated carboxylic acid or its derivative, and a resin composition compounding a weatherability modifier. SOLUTION: A cover for a cleaning opening 1 is produced from a resin composition comprising 50-100 pts.wt. of a saturated polyester resin such as regenerated polyethylene terephthalate, 0-50 pts.wt. of modified α olefin copolymer drafted by unsaturated carboxylic acid such as modified ethylene-propylene copolymer rubber or its derivative and 0.1-5 pts.wt. of an weatherability modifier such as titanium oxide to the total of 100 pts.wt. of a saturated polyester resin and modified α-olefin copolymer rubber. Thus, it is excellent in execution, and impact resistance and withstand load can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cleaning mouth lid and a cleaning mouth which are attached to an upper end opening of a rising pipe which is a cleaning mouth of a rainwater pipe or a sewage pipe.

[0002]

2. Description of the Related Art A conventional lid for a cleaning opening is disclosed, for example, in Japanese Utility Model Publication No. 62-9404 and Japanese Utility Model Publication No. 64-4945.
As disclosed in Japanese Unexamined Patent Application Publication No. 63-62367, resin concrete and polypropylene are used. In some cases, the lid is fitted to a receiving frame mounted on the upper end opening of the riser, and the receiving frame is made of hard vinyl chloride resin or polypropylene.

[0003]

However, since the above-mentioned conventional lid made of resin concrete is heavy, there is a problem that workability is poor. In addition, a lid made of hard vinyl chloride resin or polypropylene has no problem in terms of workability, but has a problem in that the load resistance is poor. Similarly, there has been a problem that the conventional receiving frame has poor load-bearing characteristics.

[0004] It is an object of the present invention to provide a cleaning port lid and a cleaning port for a pipeline which have good workability and excellent load-bearing characteristics.

[0005]

According to the present invention, there is provided a modified polyester obtained by grafting a saturated polyester resin of 50 to 100 parts by weight with an unsaturated carboxylic acid or a derivative thereof.
-A resin composition comprising 0 to 50 parts by weight of an olefin copolymer rubber and 0.1 to 5 parts by weight of a weather resistance modifier with respect to a total of 100 parts by weight of the saturated polyester resin and the modified α-olefin copolymer rubber. This is a cleaning port lid for pipes made from objects.

According to a fourth aspect of the present invention, the receiving frame mounted on the upper end opening of the riser and the lid fitted to the receiving frame are both 50 to 100 parts by weight of a saturated polyester resin and unsaturated. 0 to 50 parts by weight of a modified α-olefin copolymer rubber grafted with a carboxylic acid or a derivative thereof, and 100 parts by weight of the above-mentioned saturated polyester resin and modified α-olefin copolymer rubber, and 0.1 to 5 parts by weight of a resin composition made of a resin composition.

In the present invention, the saturated polyester resin refers to a carboxylic acid containing terephthalic acid or a derivative thereof (eg, lower alkyl ester, phenyl ester, etc.) and ethylene glycol or an ester derivative thereof (eg, monocarboxylic acid ester, ethylene oxide, etc.). It is obtained by polycondensing with the diol contained.

[0008] The saturated polyester resin may be homopolyethylene terephthalate derived from terephthalic acid and ethylene glycol. Other dicarboxylic acids may be used in addition to terephthalic acid. May be a copolymerized polyester obtained by using another diol compound in addition to ethylene glycol.

When the saturated polyester resin is such a copolymerized polyester, it contains not more than 20 mol% of structural units derived from dicarboxylic acids other than terephthalic acid and / or diols other than ethylene glycol. You may.

The dicarboxylic acids other than the above terephthalic acid include, for example, aromatic dicarboxylic acids such as orthophthalic acid, nesophthalic acid, naphthalenedicarboxylic acid, diphenylcarboxylic acid, diphenoxyethanedicarboxylic acid, adipic acid, sebacic acid, azelaic acid, decane Examples thereof include aliphatic dicarboxylic acids such as dicarboxylic acids, alicyclic dicarboxylic acids such as cyclohexanedicarboxylic acid, and ester derivatives thereof.

In the present invention, as the above-mentioned saturated polyester resin, for example, recycled polyethylene terephthalate obtained by collecting and regenerating a used plastic bottle, which is a container for soft drinks and liquid seasonings, is used. It is also suitable from an environmental point of view.

The modified α-olefin copolymer rubber in the present invention is a rubber grafted with an unsaturated carboxylic acid or a derivative thereof. For example, an ethylene / α-olefin copolymer graft-modified with maleic acid or maleic anhydride is used. Rubber, specifically, a modified ethylene / propylene copolymer rubber may be used.

In the present invention, the modified α-polymer is added to 50 to 95 parts by weight of the saturated polyester resin.
0 to 50 parts by weight of the olefin copolymer rubber is added. In the present invention, the modified α-olefin copolymer rubber is not an essential component, and may not be contained at all.

Examples of the weather resistance modifier in the present invention include titanium oxide. The addition amount of the weather resistance modifier is 0.1 to 5 parts by weight, more preferably 2 to 5 parts by weight, based on 100 parts by weight of the total of the saturated polyester resin and the modified α-olefin copolymer rubber. It is desirable to do.

As the resin composition of the present invention, a resin composition comprising the above-mentioned saturated polyester resin, a modified α-olefin copolymer rubber, and a weather resistance modifier is added to ethylene resin for adjusting the crystal state. A metal salt of an unsaturated carboxylic acid copolymer may be added. The metal salt of the ethylene-unsaturated carboxylic acid copolymer is a copolymer of ethylene and an α (or β) -unsaturated carboxylic acid in which some or all of the carboxyl groups are sodium, potassium, magnesium, It is an ionic salt neutralized with a metal cation such as calcium, and is generally known as an ionomer. The addition amount of the metal salt of the ethylene / unsaturated carboxylic acid copolymer is 1 to 30 parts by weight based on 100 parts by weight of the total of the saturated polyester resin, the modified α-olefin copolymer rubber and the weather resistance modifier. Part.

In the present invention, a pigment, a lubricant, a heat stabilizer, an antistatic agent, a water resistance agent, an impact modifier, a dispersant, and the like may be appropriately added to the resin composition as required.

(Function) In the first aspect of the present invention,
The cleaning mouth lid is 50 to 100 parts by weight of a saturated polyester resin, 0 to 50 parts by weight of a modified α-olefin copolymer rubber grafted with an unsaturated carboxylic acid or a derivative thereof, and The weatherability modifier was added to 100 parts by weight of the total of the polymerized rubber.
Since it is made from a resin composition consisting of 1 to 5 parts by weight, it is lighter in weight and has better workability than conventional resin concrete. Further, it has excellent impact resistance and load resistance, and is suitable as a lid for a cleaning port.

In the invention according to claim 2, since the weather resistance modifier is titanium oxide having an ultraviolet shielding function,
Even if exposed to sunlight, it does not discolor or deteriorate due to ultraviolet rays,
In addition, the load-bearing characteristics can be maintained for a long time without reducing the mechanical strength.

According to the third aspect of the invention, since the saturated polyester resin is recycled polyethylene terephthalate, an inexpensive cleaning port lid can be provided. It is also preferable in terms of environmental protection in terms of recycling raw materials.

According to the fourth aspect of the present invention, both the receiving frame mounted on the upper end opening of the riser and the lid fitted on the receiving frame are the same as in the first aspect. To 100 parts by weight, 0 to 50 parts by weight of a modified α-olefin copolymer rubber grafted with an unsaturated carboxylic acid or a derivative thereof, and a total of 100 parts of the saturated polyester resin and the modified α-olefin copolymer rubber.
Since it is made of a resin composition comprising 0.1 to 5 parts by weight of a weather resistance modifier with respect to parts by weight, it is lighter in weight and more excellent in workability than a conventional one. Further, it has excellent impact resistance and load resistance, and is suitable as a cleaning port for a rising pipe in a pipeline.

According to the fifth aspect of the present invention, since the saturated polyester resin is recycled polyethylene terephthalate and the weather resistance modifier is titanium oxide, a cleaning port free from discoloration and deterioration is provided at low cost. Can be. It is also preferable in terms of environmental protection in terms of recycling raw materials.

[0022]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a plan view showing a first embodiment of the cleaning port cover of the present invention, and FIG. 2 is a sectional view taken along line XX of FIG.

Reference numeral 1 denotes a cleaning mouth lid, which is 90 parts by weight of polyethylene terephthalate recycled from the collected PET bottle, 10 parts by weight of modified ethylene / propylene copolymer rubber,
Using a resin composition comprising 3 parts by weight of titanium oxide as a raw material for molding, the resin was heated to 250 to 290 ° C. by an injection molding machine and melted, and the resin in a molten state was filled in a predetermined molding die. Thereafter, it is cooled and solidified to form a molded article. The diameter of the cleaning port lid 1 is about 300 mm, the wall thickness is about 5 mm, and the weight is about 1.5 kg.

As shown in FIGS. 1 and 2, on the outer peripheral portion of the upper surface of the cleaning port lid 1, vertically elongated finger hooks 2, 2 are provided in a bilaterally symmetrically concave shape. Further, annular ribs 3 and 4 are formed concentrically on the outer periphery on the lower surface side of the cleaning port lid 1. The height of the annular rib 3 is about 20 mm. The inner annular rib 4 is slightly higher than the outer annular rib 3, and the interval between the two annular ribs 3 and 4 is approximately the same as the wall thickness of the riser tube.

The cleaning port lid 1 is attached to, for example, an upper end opening of a rising pipe 5 connected to an upper end opening of a sewage basin (not shown) of a sewage pipe (not shown) buried in the ground. Used. More specifically, the fingers of both hands are put into the left and right finger hooks 2 and 2 to hold the cleaning mouth lid 1, and as shown in FIG. May be pushed into the upper end of the riser tube 5 for mounting.

The load capacity of the cleaning port lid 1 is about 30 kN.
And the load bearing value was about three times that of the conventional polypropylene lid. The load resistance test value of a conventional polypropylene lid of the same size was about 10 kN.

This load-bearing test was conducted according to JSW standard JSW
The measurement was performed according to ASK-8-1996. Length 150
1 is a test piece at the upper end opening of the riser 5 of FIG.
The lid 1 is attached, and the thickness of the lid 1 is approximately 6 m almost at the center of the upper surface.
m rubber plate, length 200mm, width 160
mm, 20mm thick iron loading plate, 10 ± 2 per minute
A load was applied at a speed of mm, and the lid was visually inspected for cracks and cracks. Atmospheric temperature during test is 23 ± 2 ℃
And

FIG. 4 is a semi-longitudinal sectional view showing the first embodiment of the cleaning opening of the present invention together with a use state, FIG. 5 is a plan view and a bottom view showing the lid in FIG. 4, and FIG. 6 is attached to the lid in FIG. 7 is a semi-longitudinal sectional view showing a receiving frame in FIG. 4, and FIG. 8 is a partial sectional view showing a seal ring mounted on the receiving frame in FIG.

Reference numeral 1A denotes a cleaning port, which comprises a receiving frame 20 and a lid 10 fitted to the upper end opening of the receiving frame 20.

The lid 10 comprises a disk-shaped lid main body 11 and a short cylindrical portion 13 integrally provided from the lower surface of the lid main body 11. An engaging portion 131 is provided on the outer periphery of the distal end of the short cylindrical portion 13.
The ring portion 30 having a substantially J-shaped cross section shown in FIG. 6 is mounted and locked on the outer periphery of the short cylindrical portion 13 by using the locking portion 131. The ring body 30 is made of a hard polyethylene resin. A plate-like reinforcing rib 14 is provided radially inside the short cylindrical portion 13. The height of the reinforcing rib 14 is about 1/3 of the length of the short cylindrical portion 13. On the upper surface of the lid body 11, anti-slip projections 12 are provided in an oblique lattice shape, and one finger hook 11 that is horizontally long in a plan view is recessed.

As shown in FIG. 7, the receiving frame 20 is a short-cylindrical socket having a large diameter at one end and having a different diameter.
It has an insertion portion 21 and a lid receiving portion 22. An annular groove 23 in which a seal ring 40 shown in FIG. 8 is mounted is formed by providing two protrusions around the lower end of the insertion portion 21. The seal ring 40 is made of synthetic rubber having a substantially V-shaped cross section, and has a ring main body 41 and a fin-shaped seal portion 42.

The ring body 3 is provided on the outer periphery of the short cylindrical portion 13.
0 is inserted into the receiving frame 20 in which the seal ring 40 is attached to the annular groove 23, and the outer peripheral lower surface of the lid main body 11 is placed on the lid receiving portion 22.
By pressing the ring body 30 between the short cylindrical portion 13 and the insertion portion 21, the cleaning port 1A is formed.

In this embodiment, the lid 10 and the receiving frame 20
Both are heated and melted at 250 to 290 degrees by an injection molding machine using a resin composition consisting of 100 parts by weight of polyethylene terephthalate recycled from the collected PET bottle and 3 parts by weight of titanium oxide as a raw material for molding, The resin in a molten state is filled into a predetermined molding die, and then cooled and solidified to form a molded product. The diameter of the lid 10 is about 200 m
m, thickness is about 5 mm. Both the lid 10 and the receiving frame 20 weighed about half that of the conventional hard vinyl chloride resin.

As shown in FIG. 4, the cleaning port 1A is provided with a rising pipe 50 connected to an upper end opening of a sewage tank (not shown) of a sewage pipe (not shown) buried in the ground, for example.
It is used by being attached to the upper end opening. At that time, receiving frame 2
Since the seal ring 40 is attached to the outer periphery of the insertion portion 21 of the zero, the water tightness with the inner peripheral surface of the riser tube 50 is good.

[0035]

According to the first to third aspects of the present invention, the cleaning mouth lid has a saturated polyester resin of 50 to 100 parts by weight, a modified α-olefin copolymer rubber of 0 to 50 parts by weight, Because it is made of a specific resin composition consisting of 0.1 to 5 parts by weight of a weather resistance modifier with respect to a total of 100 parts by weight of the modified α-olefin copolymer rubber, it is lightweight and has a low workability. It is also excellent in impact resistance and load resistance, and is suitable as a cleaning port lid.

Further, in the second aspect of the present invention, since titanium oxide is used as a weather resistance modifier, it does not discolor due to sunlight and can maintain load-bearing characteristics for a long time.

Further, in the invention according to claim 3,
Since the saturated polyester resin is recycled polyethylene terephthalate, recovered raw materials such as pet bottles can be used, which can contribute to recycling, and can provide an inexpensive and environmentally-friendly lid for a cleaning port.

According to the fourth aspect of the present invention, both the receiving frame and the lid fitted to the receiving frame are, as in the first aspect, 50 to 100 parts by weight of a saturated polyester resin and a modified α-olefin. 0 to 50 parts by weight of copolymer rubber,
Since it is made from a specific resin composition comprising 0.1 to 5 parts by weight of a weather resistance modifier with respect to 100 parts by weight of the total of the saturated polyester resin and the modified α-olefin copolymer rubber, a conventional resin composition is used. It is lighter in weight, has better workability, has better impact resistance and load resistance, and is suitable as a cleaning port.

According to the fifth aspect of the present invention, since the saturated polyester resin is recycled polyethylene terephthalate and the weather resistance modifier is titanium oxide, a cleaning port free from discoloration and deterioration due to sunlight is provided at low cost. It is possible, and it is preferable in terms of environmental protection in terms of recycling of raw materials.

[Brief description of the drawings]

FIG. 1 is a plan view showing a first embodiment of a cleaning mouth lid according to the present invention.

FIG. 2 is a sectional view taken along line XX of FIG.

FIG. 3 is an explanatory view showing a use state of the cleaning port cover of FIG. 1;

FIG. 4 is a semi-longitudinal sectional view showing a first embodiment of the cleaning port of the present invention together with a use state.

FIG. 5 is a plan view and a bottom view showing the lid in FIG. 4;

FIG. 6 is a partial sectional view showing a locking ring mounted on the lid of FIG. 5;

FIG. 7 is a semi-longitudinal sectional view showing the receiving frame in FIG. 4;

FIG. 8 is a partial sectional view showing a seal ring mounted on the receiving frame of FIG. 7;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cleaning opening lid 1A Cleaning opening 10 Lid 2 Finger rest 20 Receiving frame 21 Insertion part 22 Lid receiving part 30 Ring body 3, 4 Annular rib 40 Seal ring 5 Rise pipe

Claims (5)

[Claims] 1 to 50 parts by weight of a saturated polyester resin; 0 to 50 parts by weight of a modified α-olefin copolymer rubber grafted with an unsaturated carboxylic acid or a derivative thereof; The weatherability modifier was added to the polymer rubber in a total amount of 100 parts by weight.
A lid for a cleaning opening of a pipeline, wherein the lid is made of a resin composition comprising 1 to 5 parts by weight. 2. The weather resistance modifier is titanium oxide.
A cleaning mouth lid for the described conduit. 3. The lid according to claim 1, wherein the saturated polyester resin is recycled polyethylene terephthalate. 4. A cleaning opening for a conduit comprising a receiving frame mounted on an upper end opening of a riser tube and a lid fitted to the receiving frame, wherein the receiving frame and the lid are made of a saturated polyester resin 50. ~ 1
00 parts by weight, 0 to 50 parts by weight of a modified α-olefin copolymer rubber grafted with an unsaturated carboxylic acid or a derivative thereof, and 100 parts by weight of the saturated polyester resin and the modified α-olefin copolymer rubber in total. And a resin composition comprising 0.1 to 5 parts by weight of a weather resistance modifier. 5. The pipe opening according to claim 4, wherein the saturated polyester resin is recycled polyethylene terephthalate, and the weather resistance modifier is titanium oxide.