KR102324790B1 - Round bar support connector for improved watertightness and durability - Google Patents

Abstract

Provided is a round bar support connector with excellent watertightness and durability. The round bar support connector includes: a packing member surrounding the outer circumference of a pipe; a coupling member including a combination surface surrounding the outer circumference surface of the packing member, wherein both front end areas of the combination surface are spaced apart from each other by a predetermined distance to provide round bar insertion parts parallel with each other, and including a coupling plate interposed between the round bar insertion parts and the packing member; a pair of round bar members inserted into the round bar insertion parts to be combined therewith, respectively; and a plurality of coupling members including a fixing bolt penetrating a side part of the pair of round bar members, a fixing nut combined with an end part of the fixing bolt to tighten a gap between both front ends of the combination surface, and a spring combined between the outer circumference surface of the fixing bolt and the fixing nut so as to be brought into contact with one cross section of the fixing nut. Therefore, the present invention is capable of preventing a water leak by minimizing the influence from vibrations.

Description

Round bar support connector for improved watertightness and durability

The present invention relates to a round bar support coupler, and to a round bar support coupler having excellent watertightness and durability.

The pipe or pipe through which the liquid or gas moves is connected in such a way that the area where the pipe (tube) and the pipe (tube) come into contact is wrapped from the outside and tightened with a fastener. This connection is made by using a device that seals the contact area with a sealing material formed of rubber or synthetic resin and tightens the outer circumferential surface of the sealing material in order to prevent fluid leakage into the gap between the two pipes or the area in which the two pipes contact or the inflow of foreign substances from the outside. is done

The pipe connection device as described above is being developed in various ways, among which the round bar connector has a sealing material surrounding the outer circumferential surface of the pipe, a fastening band with a partially open outer circumferential surface surrounding the sealing material, and a round bar is inserted into the open both sides of the bolt It is a method to improve the sealing force by tightening the nut with the fastening.

Regarding the method of connecting pipes using the round bar connector, Korean Patent No. 10-0960140's 'Round Bar Spacing Device for Pipe Connectors' and Korean Utility Model No. 20-0312749 for 'Round Bar Support Coupler' has been disclosed. In this way, since the force tightened by the operator with the fastener is not evenly transmitted to the entire surface, leakage may occur even after assembling for the pipe coupling is completed, resulting in a connection problem.

And, since most of the connected pipes are buried underground after they are connected, it can be seen that it is impossible to check them unless special circumstances occur after they are buried once. In other words, due to the various types of fluids supplied after the pipe is buried underground, the earth pressure applied depending on the vehicle or the surrounding environment, strong vibrations from construction sites or earthquakes, and the thermal expansion coefficient of the round bar connector related to seasonal changes. Physicochemical changes may occur in pipe and round bar connections. Therefore, even in fasteners such as bolts and nuts, loosening may occur due to impact or deformation, which may weaken the durability of the sealing material and lower watertightness, resulting in water leakage.

Korean Patent Registration No. 10-0960140 (Registration Date: May 19, 2010) Korea Registered Utility Model No. 20-0312749 (Registration Date: April 28, 2003)

An object of the present invention is to provide a round-bar support connector with excellent watertightness and durability that can minimize the influence of external temperature and vibration occurring in the surroundings, such as seasonal changes.

The object of the present invention is not limited to the object mentioned above, and other objects not mentioned will be clearly understood by those of ordinary skill in the art to which the present invention belongs from the following description.

In order to solve the above problem, the present invention provides a packing member surrounding the outer diameter of the pipe; A coupling surface surrounding the outer circumferential surface of the packing member is provided, wherein both front end regions of the coupling surface are spaced apart from each other at a predetermined interval to provide a round bar insert parallel to each other, and a fastening plate interposed between the round bar insert and the packing member. A coupling member comprising a; a pair of round bar members fitted to the round bar inserts, respectively; and a fixing bolt passing through the side of the pair of round bar members, a fixing nut coupled to the end of the fixing bolt and tightening between the ends of both sides of the coupling surface, and the fixing nut and the fixing nut to be in contact with one end of the fixing nut It is possible to provide a round bar support connector having excellent watertightness and durability, characterized in that it includes; a plurality of fastening members including a spring coupled between the outer peripheral surfaces of the bolt.

The packing member may be formed including maleic anhydride grafted ethylene-propylene-diene rubber (MA-g-EPDM), surface-modified calcium carbonate, polyhedral oligomeric silsesquioxane (POSS), glass frit, or pigment. .

The round bar member may be provided with a plurality of bolt through holes through which the fixing bolt passes through the side portion.

The round bar member may include a vibration damping member interposed between the outer circumferential surface of the round bar member in the region where the bolt through hole is located and the inner surface of the round bar insert.

In the side surfaces of the pair of round bar members facing each other, the end of the bolt through hole may be formed with a coupling protrusion in contact with the concave portion of the coupling screw surface of the fixing bolt.

The upper surface of one side of the fastening plate may be welded to a lower surface of one of the both end regions, and the upper surface of the other side may be positioned in contact with the lower portion of the other one of the both end regions.

The round bar support connector having excellent watertightness and durability according to an embodiment of the present invention has the effect of preventing water leakage by minimizing the influence of external temperature such as seasonal changes and vibrations occurring in the surroundings.

1 is an exploded perspective view showing a coupling relationship of a round bar support connector according to an embodiment of the present invention;
Figure 2 is a plan view showing the parts for the manufacture of the coupling member of the round bar support connector according to an embodiment of the present invention;
3 is a cross-sectional view showing a tightening method of a round bar support connector according to an embodiment of the present invention;
4 is a perspective view showing a round bar member according to an embodiment of the present invention;
5 is a cross-sectional view showing a part of the coupling area after coupling of the round bar support connector according to an embodiment of the present invention;
6 is a perspective view showing a round bar member according to another embodiment of the present invention;
7 is a cross-sectional view showing a part of the coupling area after coupling of the round bar support connector according to another embodiment of the present invention;
8 is a photograph showing a round bar support connector according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The embodiments introduced below are provided as examples so that the spirit of the present invention can be sufficiently conveyed to those skilled in the art. Accordingly, the present invention is not limited to the embodiments described below and may be embodied in other forms. In addition, in the drawings, the length, thickness, etc. of layers and regions may be exaggerated for convenience. Like reference numerals refer to like elements throughout.

Figure 1 is an exploded perspective view showing the coupling relationship of the round bar support connector according to an embodiment of the present invention, Figure 2 is a plan view showing parts for manufacturing the coupling member of the round bar support connector according to an embodiment of the present invention, Figure 3 is A cross-sectional view showing a method of tightening a round bar support connector according to an embodiment of the present invention, FIG. 4 is a perspective view showing a round bar member according to an embodiment of the present invention, and FIG. 5 is a round bar support connector according to an embodiment of the present invention. A cross-sectional view showing a part of the region, FIG. 6 is a perspective view showing a round bar member according to another embodiment of the present invention, and FIG. 8 is a photograph showing a round bar support connector according to an embodiment of the present invention.

1 to 8, the round bar support connector 10 having excellent watertightness and durability according to an embodiment of the present invention includes a packing member 100 surrounding the outer diameter of the pipe; It includes a coupling surface 210 surrounding the outer circumferential surface of the packing member 100, but both ends (X) areas of the coupling surface 210 are spaced apart at a predetermined interval to provide a round bar insert 220 parallel to each other. and a coupling member 200 including a fastening plate 230 interposed between the round bar insert 220 and the packing member 100; A pair of round bar members 300 that are respectively fitted to the round bar insert 220; And a fixing bolt 410 passing through the side of the pair of round bar members 300, and a fixing nut 420 coupled to the end of the fixing bolt 410 and tightening between both ends of the coupling surface, and the fixing A plurality of fastening members 400 including a spring 430 coupled between the outer peripheral surface of the fixing nut 420 and the fixing bolt 410 so as to be in contact with one end surface of the nut 420; may be provided.

In detail, the packing member 100 that surrounds the outer diameter of the pipe may be formed with constant curvature at predetermined intervals on the inner circumferential surface in contact with the pipe as shown in FIG. 1, and maleic anhydride grafted ethylene-propylene-diene rubber (MA) -g-EPDM), surface-modified calcium carbonate, polyhedral oligomeric silsesquioxane (POSS), glass frit or pigment may be included. In detail, the packing member 100 that surrounds the outer diameter of the pipe may be formed with constant curvature at predetermined intervals on the inner circumferential surface in contact with the pipe as shown in FIG. 1, and maleic anhydride grafted ethylene-propylene-diene rubber (MA) -g-EPDM), surface-modified calcium carbonate, polyhedral oligomeric silsesquioxane (POSS), glass frit or pigment may be included. For example, in the maleic anhydride grafted ethylene-propylene-diene rubber (MA-g-EPDM), maleic anhydride is grafted to ethylene-propylene-diene rubber, and the maleic anhydride graft ratio is 3 to 8% by weight. can Based on 100 parts by weight of the maleic anhydride grafted ethylene-propylene-diene rubber (MA-g-EPDM), the surface-modified calcium carbonate is 10 to 30 parts by weight, the POSS is 3 to 15 parts by weight, and the glass frit is 1 to 20 parts by weight, and 5 to 20 parts by weight of the pigment may be added.

For example, in the maleic anhydride grafted ethylene-propylene-diene rubber (MA-g-EPDM), maleic anhydride is grafted to ethylene-propylene-diene rubber, and the maleic anhydride graft ratio is 3 to 8% by weight. and more preferably 4 to 6% by weight. It is possible to increase the watertightness of the round-bar support connector 10 by retaining the elastic force in this range, and to smoothly react with the surface-modified calcium carbonate and polyhedral oligomer silsesquioxane (POSS) to improve appropriate strength and durability. have. On the other hand, when the content of the grafted maleic anhydride is less than 3% by weight, the reaction with the surface-modified calcium carbonate and polyhedral oligomer silsesquioxane (POSS) may not occur smoothly, and the content of the grafted maleic anhydride is 8% by weight When it exceeds, the elasticity may be lowered.

The ethylene-propylene-diene rubber before the maleic anhydride is grafted is a random polymerization of ethylene-propylene-diene, and may contain 65 to 80% by weight of ethylene, 15 to 30% by weight of propylene, and 3 to 10% by weight of diene and may have a Mooney viscosity at 125°C (ML1+4@125°C) of 40 to 60. By using the EPDM rubber that satisfies this, the packing member 100 having excellent mechanical properties can be secured.

In one embodiment of the present invention, the surface-modified calcium carbonate serves as a filler, and particularly preferably, a surface-modified calcium carbonate with an amine group-containing silane compound may be used. As such, when calcium carbonate whose surface has been modified with an amine-containing silane compound is used, the maleic anhydride grafted ethylene-propylene-diene rubber (MA-g-EPDM) and the polyhedral oligomeric silsesquioxane (POSS) are tightly bonded to each other to form a packing member. It is good that mechanical properties such as tensile strength and flexural strength of (100) can be improved.

In this case, the amine group-containing silane compound is 3-aminopropyl trimethoxysilane, 3-aminopropyl triethoxysilane, 3-aminopropyl methyldiethoxysilane, 3-aminopropyl dimethylethoxysilane, and 4-aminobutyl tri It may be any one or two or more selected from the group consisting of methoxysilane, 3-(meta-aminophenoxy)propyltrimethoxysilane, and normal-(2-aminoethyl)-3-aminopropylmethyldimethoxysilane. and it is preferable to use 3-aminopropyl trimethoxysilane or 3-aminopropyl triethoxysilane.

The surface-modified calcium carbonate may be added in an amount of 10 to 30 parts by weight based on 100 parts by weight of maleic anhydride grafted ethylene-propylene-diene rubber (MA-g-EPDM), and more preferably 15 to 25 parts by weight. have. Within this range, the effect of improving the mechanical properties of the packing member 100 may be excellent.

In addition, the polyhedral oligomeric silsesquioxane (POSS) is added to further improve the strength of the packing member 100, and particularly preferably, polyhedral oligomeric silsesquioxane substituted with a hydroxyl group may be used. As such, when POSS substituted with a hydroxyl group is used, mechanical properties such as tensile strength and flexural strength of the band are improved because it is more tightly combined with the maleic anhydride grafted ethylene-propylene-diene rubber (MA-g-EPDM) and surface-modified calcium carbonate. can be

In this case, the polyhedral oligomeric silsesquioxane substituted with the hydroxyl group is cyclohexanediol isobutyl POSS (Cyclohexanediol isobutyl POSS), 1,2-Propanediol isobutyl POSS (1,2-Propanediol isobutyl POSS) and octa (3-hydroxy Roxy-3-methylbutyldimethylsiloxy) POSS ((Octa(3-hydroxy-3-methylbutyldimethylsiloxy) POSS) may be any one or two or more selected from the group consisting of POSS.

The POSS may be added in an amount of 3 to 15 parts by weight, more preferably 5 to 10 parts by weight, based on 100 parts by weight of the maleic anhydride grafted ethylene-propylene-diene rubber (MA-g-EPDM). In this range, the effect of tensile strength and flexural strength is excellent, and injection molding can be easily performed. On the other hand, when POSS is added in an amount of less than 3 parts by weight, the effect of improving strength may be insignificant, and when POSS is added in an amount of more than 15 parts by weight, there may be a problem that injection molding is not performed.

In an example of the present invention, the glass frit is for improving adhesion with concrete and asphalt substrates, and particularly preferably Bi ₂ O ₃ 65 to 75 wt%, SiO ₂ 10 to 20 wt%, B ₂ O ₂ 5 to 15% by weight, Al ₂ O ₂ 1 to 5% by weight, TiO ₂ 1 to 3% by weight and CuO 0.5 to 2% by weight may be used. By using a glass frit that satisfies this, adhesion to concrete and asphalt substrates can be effectively improved, and compatibility with each component can be excellent.

The glass frit may be added in an amount of 1 to 20 parts by weight, more preferably 3 to 15 parts by weight, based on 100 parts by weight of maleic anhydride grafted ethylene-propylene-diene rubber (MA-g-EPDM). In such a range, the adhesive strength improvement effect may be excellent. On the other hand, when the glass frit is added in an amount of less than 1 part by weight, the effect of improving the adhesion may be insignificant, and when the glass frit is added in an amount of more than 20 parts by weight, the strength and elastic properties of the packing member 100 may be reduced.

In one example of the present invention, the pigment is added to develop the color of the packing member 100, and as long as it is commonly used in the art, it can be used without particular limitation, for example, Naples Yellow or Chrome yellow, zinc yellow, etc. can be used, and when a different color is required, iron trioxide red shows red, ferric oxide shows reddish brown, copper bromide phthalate Rocyanine is green, and Mr. kid. Pigment blue (C.I. Pigment blue) may represent blue.

The content of the pigment may be adjusted at a conventional level, for example, may be added in an amount of 5 to 20 parts by weight based on 100 parts by weight of maleic anhydride grafted ethylene-propylene-diene rubber (MA-g-EPDM), More preferably, 3 to 10 parts by weight may be added. In such a range, color development may be excellent.

Meanwhile, the packing member 100 may be manufactured and molded through injection molding. [Production Example 1]

Maleic anhydride grafted ethylene-propylene-diene rubber (MA-g-EPDM) was prepared by the Martin method, and specifically, 10 g of EPDM (Kumho Polychem, KEP 570P) was added to 100 ml of xylene. After dissolution, 2 g of maleic anhydride and 0.1 g of dicumyl peroxide were dissolved in 20 ml of xylene and slowly added dropwise to the EMDM solution. Thereafter, the reactor temperature was raised to 120° C. and reacted for 10 hours, and after completion of the reaction, it was purified and dried to obtain MA-g-EPDM. The graft ratio of the obtained MA-g-EPDM was measured through neutralization titration, and as a result, the graft ratio of maleic anhydride was measured to be 4.55 wt%.

[Production Example 2]

After dissolving 10 g of EPDM (Kumho Polychem, KEP 570P) in 100 ml of xylene, 1 g of maleic anhydride and 0.1 g of dicumyl peroxide were dissolved in 20 ml of xylene and slowly added dropwise to the EMDM solution. was carried out in the same manner as in Preparation Example 1. As a result, the graft ratio of maleic anhydride was measured to be 2.15 wt%.

[Production Example 3]

After dissolving 10 g of EPDM (Kumho Polychem, KEP 570P) in 100 ml of xylene, 4 g of maleic anhydride and 0.1 g of dicumyl peroxide were dissolved in 50 ml of xylene and slowly added dropwise to the EMDM solution. was carried out in the same manner as in Preparation Example 1. As a result, the graft ratio of maleic anhydride was measured to be 9.20 wt%.

[Example 1]

Based on 100 parts by weight of MA-g-EPDM prepared in Preparation Example 1, 22 parts by weight of surface-modified calcium carbonate (M-calcium carbonate), 6 parts by weight of 1,2-propanediolisobutyl POSS, 11 parts by weight of glass frit and 8 parts by weight of a pigment (chrome yellow) were mixed and then injection molded to prepare a sample. _{At this time, the surface-modified calcium carbonate was added to 20 parts by weight of calcium carbonate (CaCO 3} , average diameter 200 nm) based on 100 parts by weight of 3-aminopropyl triethoxysilane and stirred at a speed of 100 rpm for 10 minutes, followed by 2 hours While hot air drying at a temperature of 50 ° C. was used, the glass frit was Bi ₂ O ₃ 71 wt%, SiO ₂ 13 wt%, B ₂ O ₂ 8.5 wt%, Al ₂ O ₂ 4 wt%, TiO ₂ 2 wt% and 1.5 wt% of CuO was used.

[Examples 2 to 7]

As shown in Table 1 below, all processes were performed in the same manner as in Example 1, except that the content (parts by weight) of each component was differently adjusted and mixed and then injection-molded to prepare a sample of the packing member 100 .

[Example 8]

All processes were performed in the same manner as in Example 1 except that MA-g-EPDM of Preparation Example 2 was used instead of MA-g-EPDM of Preparation Example 1.

[Example 9]

All processes were performed in the same manner as in Example 1 except that MA-g-EPDM of Preparation Example 3 was used instead of MA-g-EPDM of Preparation Example 1.

[Comparative Example 1]

A sample of the packing member 100 was prepared by mixing 8 parts by weight of MA-g-EPDM of Preparation Example 1 and a pigment (chrome yellow), followed by injection molding.

(parts by weight) MA-g-EPDM M-Calcium Carbonate POSS glass frit pigment Example 1 Preparation Example 1 100 22 6 11 8 Example 2 100 One 6 11 8 Example 3 100 50 6 11 8 Example 4 100 22 One 11 8 Example 5 100 22 30 11 8 Example 6 100 22 6 0.1 8 Example 7 100 22 6 30 8 Example 8 Preparation 2 100 22 6 11 8 Example 9 Preparation 3 100 22 6 11 8 Comparative Example 1 Preparation Example 1 100 - - - 8

[Characteristic evaluation]

Tensile strength, bending strength and adhesive strength of the samples of the packing member 100 prepared in Examples 1 to 9 and Comparative Example 1 were measured according to the following evaluation method, and the results are shown in Table 2 below.

1) Tensile strength: The tensile strength (MPa) of the packing member 100 sample was measured according to KS M ISO 527-1.

2) Flexural strength: The flexural strength (MPa) of the packing member 100 sample was measured in accordance with KS F 4419.

3) Adhesive strength: A sample of the packing member 100 was attached on an asphalt specimen using W-310SE, and the adhesive strength was measured. The adhesive strength was based on the tensile adhesive strength, and the adhesive strength (MPa) was measured in accordance with KS F 4931.

tensile strength
(㎫) flexural strength
(㎫) Adhesive strength
(㎫) Example 1 13.2 11.6 1.5 Example 2 11.7 11.9 1.8 Example 3 12.5 9.5 0.9 Example 4 10.5 8.9 1.0 Example 5 13.7 12.1 0.8 Example 6 12.4 11.2 0.9 Example 7 10.1 8.4 1.6 Example 8 11.2 10.3 1.1 Example 9 12.8 9.1 1.3 Comparative Example 1 9.2 6.5 0.6

As shown in Table 2, the samples of the packing member 100 of Examples 1 to 9 prepared according to the present invention were all excellent in tensile strength, flexural strength and adhesive strength compared to Comparative Example 1. In particular, the content of surface-modified calcium carbonate, 1,2-propanediol isobutyl POSS and glass frit is appropriately adjusted while using MA-g-EPDM rubber having a maleic anhydride graft ratio of 3 to 8 wt%. In the case of Example 1, the characteristics were the best. On the other hand, when the content of surface-modified calcium carbonate, 1,2-propanediolisobutyl POSS, or glass frit is too small or too large compared to MA-g-EPDM rubber, mechanical strength properties are deteriorated or adhesive strength is lowered. In addition, Bi ₂ O ₃ 71% by weight, Bi ₂ O ₃ 65 to 75% by weight, SiO ₂ 10 to 20% by weight, B ₂ O ₂ 5 to 15% by weight, Al ₂ O ₂ 1 to 5% by weight, TiO ₂ When a glass frit containing 1 to 3% by weight and 0.5 to 2% by weight of CuO was used, the effect of improving mechanical strength and adhesive strength was the most excellent.

The coupling member 200 including the coupling surface 210 surrounding the outer circumferential surface of the packing member 100 has both ends (X) regions of the coupling surface 210 are spaced apart from each other at a predetermined interval and inserted parallel to each other. The part 220 may be provided and a fastening plate 230 interposed between the round bar insertion part 220 and the packing member 100 may be included.

For example, the upper surface of one side of the fastening plate 230 is welded to the lower surface of one of the both ends (X) regions, and the other upper surface is located in contact with the lower portion of the other one of the both ends (X) regions. it could be

In detail, the coupling member 200 may be provided by manufacturing a metal plate having the shape shown in FIG. 2 in a cylindrical shape. A plurality of round-bar coupling holes 240 are formed in both end regions at equal intervals from the center of the metal plate, but according to the shape of the round-bar member 300 to be coupled, the first round-bar coupling hole 241 on the outside is the second round-bar coupling on the inside The hole 242 may be formed to have a larger horizontal and vertical size than the hole 242 . And the first round-bar coupling hole 241 and the second round-bar coupling hole 242 are bent outward around the area to be the tip (X) so that the through hole can be penetrated, and then welded or riveted to fix the round-bar insert 220. can be provided. In this case, it is possible to position the round bar member 300 prepared in advance, bend it outward to surround the round bar member 300 and then fix it.

Therefore, by molding the metal plate provided with the round bar inserting part 220 in a cylindrical shape, the coupling member 200 has a round bar coupling hole 240, a round bar inserting part 220, and a coupling surface having both ends (X) regions ( 210) may be included. In addition, the coupling member 200 may be provided in the form of enclosing the outer peripheral surface of the packing member 100 by the fastening plate 230 being positioned in the lower portion of the both ends (X) region formed by the above welding and molding process. . In this case, one upper surface of the fastening plate 230 is welded to a lower surface of one of the both ends (X) regions, and the other upper surface is located in contact with the lower portion of the other one of the both ends (X) regions. have. Therefore, during the process of tightening and coupling the fastening member 400 between the pair of round bar members 300 fitted to the round bar insertion part 220, respectively, in contact with the lower part of the other one of the both ends (X) regions The other side of the fastening plate 230 located in contact between the coupling surface 210 and the packing member 100 is moved along the outer circumferential surface of the packing member 100, and when the fastening of the round bar member 300 is completed, the fastening plate ( 230 may be fixed between the coupling surface 210 and the packing member 100 .

The fastening member 400 may be provided in plurality, and a fixing bolt 410 passing through the side of the pair of round bar members 300 is coupled to the end of the fixing bolt 410 and the coupling surface 210 ) a fixing nut 420 tightened between the both ends (X), and a spring 430 coupled between the fixing nut 420 and the fixing bolt 410 outer circumferential surface so as to be in contact with one end of the fixing nut 420. may include. The spring 430 is interposed between the fixing nut 420 and the end region of the fixing bolt 410 that is tightened and fixed between the pair of round bar members 300, so that even the compressive force of the spring 430 is applied at the time of coupling. The coupling force can be further increased, and since the spring 430 can play a role of damping, it is possible to solve the conventional problem in which a loosening phenomenon occurs due to an external shock or deformation. That is, due to the earth pressure acting according to the vehicle or the surrounding environment, strong vibrations generated from construction sites or earthquakes, and expansion and contraction of the round bar support connector 10 related to seasonal changes, the fixing nut 420 or the fixing bolt ( Even if an external force is applied to the 410), the spring 430 can absorb the shock, and even if the tightening of the fixing nut 420 or the fixing bolt 410 is partially loosened, due to the elastic force (tensile force) of the spring 430, the round bar member It is possible to minimize the weakening of the tightening force between the 300, whereby water tightness and durability can be maintained than before.

The round bar member 300 may be provided with a plurality of bolt through-holes 321 through which the fixing bolt 410 passes on the side portion. For example, the round bar member 300 may be provided with a protrusion 323 protruding to one side from the round bar member body 310 , and the bolt through hole 321 may be formed to penetrate the inside of the protrusion 323 . And, the protrusion 323 of the round bar member 300 protrudes into the first round bar coupling hole 241 of the coupling member 200, and the protrusion 323 of the first round bar coupling hole 241 to be seated inside the A plurality of seating jaws 327 may be provided on the outer circumferential surface. In addition, both ends of the round bar member 300 may be provided with a round bar step 330 to prevent the cross section of the round bar insertion part 220 from being exposed or opened, or to prevent the movement of the round bar member 300 .

In the side where the pair of round bar members 300 face each other, the end of the bolt through hole 321 may be formed with a coupling protrusion 325 that comes into contact with the concave portion of the coupling screw surface of the fixing bolt 410. have.

For example, since the pair of round bar members 300 are coupled to face each other so that the protrusion 323 is positioned with the first round bar coupling hole 241 of the coupling member 200 , one end of the bolt through hole 321 . 321a is located in contact with the head or spring 430 of the fixing bolt 410 , and the other end 321b of the bolt through hole 321 may be located in contact with the screw surface of the fixing bolt 410 . In this case, the side surface of the pair of round bar members 300 facing, that is, the other end 321b of the bolt through hole 321 may be formed with a coupling protrusion 325 in contact with the concave portion of the coupling screw surface. While the fixing bolt 410 is rotated for coupling, the coupling protrusion 325 abutting along the screw surface concave portion is fixed to the concave portion of the fixing bolt 410 after the fixing bolt 410 and the fixing nut 420 are fixedly coupled. and, thereby, may further increase the coupling force of the fastening member 400 .

Furthermore, the round bar member 300 includes a vibration damping member 340 interposed between the outer circumferential surface of the round bar member 300 in the region where the bolt through hole 321 is located and the inner side surface of the round bar insert 220 . may include. By interposing the vibration damping member 340 in the coupling region around the bolt through hole 321 of the round bar member 300, even if an impact is applied from the outside, some of the shock is absorbed between the round bar member 300 and the round bar insert 220 Therefore, it is possible to minimize the influence on the coupling force between the fastening member 400 and the round bar member 300 for external impact.

Therefore, the round-bar support connector having excellent watertightness and durability according to an embodiment of the present invention has the effect of preventing water leakage by minimizing the influence of external temperature such as seasonal changes and vibrations occurring in the surroundings.

Although the above has been described with reference to preferred embodiments of the present invention, those skilled in the art can variously modify and change the present invention within the scope without departing from the spirit and scope of the present invention as set forth in the claims below. You will understand that it can be done.

10; Round bar support connector
X; point
100; packing member
200; coupling member
210; mating surface
220; round bar insert
230; fastening plate
240; round bar coupling hole
300; round bar member
310; Round bar body
321; bolt through hole
323; projection part
325; bonding protrusion
330; Hwanbong Step
340; vibration dampening member
400; fastening member
410; fixing bolt
420; fixing nut
430; spring

Claims (6)

a packing member surrounding the outer diameter of the pipe;
A coupling surface surrounding the outer circumferential surface of the packing member is provided, wherein both front end regions of the coupling surface are spaced apart from each other at a predetermined interval to provide a round bar insert parallel to each other, and a fastening plate interposed between the round bar insert and the packing member. A coupling member comprising a;
a pair of round bar members fitted to the round bar inserts, respectively; and
A fixing bolt passing through the side of the pair of round bar members, a fixing nut coupled to the end of the fixing bolt and tightening between both ends of the coupling surface, the fixing nut and the fixing bolt so as to be in contact with one end of the fixing nut A plurality of fastening members including a spring coupled between the outer circumferential surface; and
The packing member is formed to include maleic anhydride grafted ethylene-propylene-diene rubber (MA-g-EPDM), surface-modified calcium carbonate, polyhedral oligomeric silsesquioxane (POSS), glass frit or pigment,
The maleic anhydride grafted ethylene-propylene-diene rubber (MA-g-EPDM) is an ethylene-propylene-diene rubber grafted with maleic anhydride, and the maleic anhydride graft ratio is 3 to 8 wt%,
Based on 100 parts by weight of the maleic anhydride grafted ethylene-propylene-diene rubber (MA-g-EPDM), 10 to 30 parts by weight of the surface-modified calcium carbonate, and 3 to 15 parts by weight of the polyhedral oligomeric silsesquioxane , The glass frit is 1 to 20 parts by weight, and the pigment is added in an amount of 5 to 20 parts by weight.
delete The method of claim 1,
The round bar member is a round bar support connector having excellent watertightness and durability, characterized in that it has a plurality of bolt through holes through which the fixing bolt passes.
4. The method of claim 3,
The round bar member is a round bar support connector with excellent watertightness and durability, characterized in that it comprises a vibration damping member interposed between the outer circumferential surface of the round bar member in the region where the bolt through hole is located and the inner surface of the round bar insert.
4. The method of claim 3,
In the side face of the pair of round bar members, the end of the bolt through hole is a round bar support connector with excellent water tightness and durability, characterized in that a coupling protrusion is formed along the concave portion of the coupling screw surface of the fixing bolt.
The method of claim 1,
One upper surface of the fastening plate is welded to the lower surface of one of the both end regions, and the other upper surface is located in contact with the lower portion of the other one of the both end regions.

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