KR102090313B1 - Duct socket - Google Patents

Abstract

The present invention relates to a duct socket for connecting a flexible hose to a duct. According to the present invention, the duct socket is formed with a structure in which an internal side portion can be folded and unfolded. The internal side portion is inserted into a duct and temporarily fixated by bending an engagement piece. Moreover, an external side portion and the internal side portion can be stably fixated by using a bolt. Therefore, the duct socket can be conveniently installed, and further, can provide excellent coupling force and sealing performance.

Description

Duct socket to connect flexible hose to duct {Duct socket}

The present invention relates to a duct socket, and more specifically, to a device for connecting a flexible hose connecting a duct used for air conditioning, etc. and an exhaust portion of a room to each other.

When the air from the duct enters the indoor exhaust or when the indoor air is discharged through the exhaust to the duct, the air between the indoor exhaust and the duct is generally connected through a flexible hose. The flexible hose has a structure that can be bent freely, and can be used by deforming appropriately in a space where the flexible hose is installed.

A separate socket is required to connect the flexible hose to the duct. The socket connecting the duct and the flexible hose must be sealed to prevent air leakage, and it can be used without deterioration of performance for a long time only if the socket has good clamping force to the duct.

1 is a view for explaining a state in which a flexible hose is connected to a duct using a conventional duct socket, and FIG. 2 is a view showing side and front surfaces of a conventional duct socket. 1 and 2, the conventional duct socket 96 cuts a thin pipe made of tin and shorts it, cuts the circumference of one end of the short cut pipe in several places and cuts it into the hole 62 of the duct 60. After insertion, the cut portions 94 at one end of the socket 96 are bent so as to be caught in the hole 62 of the duct 60 so that the socket 96 does not fall out. In addition, the outside of the duct 60 was treated with a silicone molding 95 so that the circumference of the socket 96 is fixed to the duct 60.

Subsequently, the flexible hose 80 is wrapped in a socket 96 fixed to the duct 60 and then fixed by winding the flexible hose 80 with a fixing band 90.

Since the conventional socket 96 relies on the silicone molding 95 for the fastening force to the duct 60, the fastening force is weak and can easily fall off when receiving an external force.

In addition, it is very cumbersome and inconvenient to cut the end of the socket 96 one by one and insert it into the hole 62 of the duct 60 to expand and fix it.

On the other hand, a related art related to a duct socket is Japanese Patent Publication No. 2001-027381 (2001.01.30. 'Connector for flexible duct hoses').

The present invention has been devised to solve the problems of the prior art as described above, and has an object to provide a duct socket that is easy to install and exhibits excellent fastening force and sealing performance.

The duct socket according to the present invention for achieving the above object is inserted into the duct hole of the duct, the inner portion fixed to the wall surface around the duct hole; And an outer portion fixed to the inner portion to which a flexible hose is coupled, wherein the inner portion has a semi-circular cross section and extends in a radial direction to an end portion of the first inner extension portion extending in one direction and an end portion of the first inner extension portion. A first inner unit having a first inner flange portion in which inner bolt holes are formed at a plurality of points; A second inner unit having a second inner extension portion having a semi-circular cross section and extending in one direction, and a second inner flange portion extending radially at the ends of the second inner extension portion and having inner bolt holes formed at a plurality of points; A locking piece installed to be bendable at a plurality of points on the outer surfaces of the first inner extension portion and the second inner extension portion; And a coupling between the first inner unit and the second inner unit so that the first inner unit and the second inner unit can be unfolded or folded in a state where both ends of the first inner extension unit of the first inner unit and the second inner extension unit of the second inner unit face each other. Means; including, the outer portion, the first inner extension portion and the second inner extension portion is formed through the penetration portion is formed, the outer extension portion is coupled to the flexible hose around the outer surface; And an outer flange portion extending radially at an end portion of the outer extension portion and having an outer bolt hole formed at a plurality of points. After the inner portion is inserted into the duct hole of the duct, the engaging piece is circumferential in the duct hole. When folded, the inner portion is temporarily fixed to the duct, and the first inner extension portion and the second inner extension portion are inserted into the through portion of the outer extension portion, and then extend from the outer bolt hole to the inner bolt hole. When the bolt is tightened, the inner portion and the outer portion may be fixed to the duct.

Here, a seating jaw may be formed at one of both ends of the first inner extension portion and the second inner extension portion, and the flat end portion of the opposing inner extension portion may be seated.

In addition, a circumferential jaw to prevent the flexible hose from falling out may be protruded from the outer circumference of the outer extension portion.

In addition, a bolt guide hole is formed in the engaging piece, and the engaging piece is installed at a position corresponding to a point where the inner bolt hole is formed, and when the engaging piece is bent, the bolt guide hole and the inner bolt hole may face each other.

According to the duct socket according to the present invention, the inner part can be folded and passed through the duct hole of the duct, so that it is easy to install the socket in the duct, and the socket is firmly coupled to the duct to provide a certain level of external force. The socket is not separated from the duct and maintains the fastening state, thereby exhibiting excellent sealing performance.

In addition, when the inner portion is first installed in the duct, the hook pieces installed on the inner extension portions are bent, so that the hook pieces and the inner flange portions are closely supported on both sides of the wall of the duct and temporarily fixed. That is, when the inner portion is installed first, the inner portion is tilted by the load of the inner flange portion, so that the inner flange portion may be opened on the wall surface of the duct. It is possible to maintain the rune state, and accordingly, the bolt may be correctly entered in the state where the inner flange portion and the wall surface are horizontal even in a later bolting operation.

On the other hand, when the inner portion enters the inside of the duct and the inner flange portion is in close contact with the duct hole, the inner bolt hole formed in the inner flange portion is not visible from the outside. Therefore, it may not be easy to align the positions of the outer bolt hole of the outer part and the inner bolt hole of the inner part. If the inner alignment hole formed in the inner part is aligned with the outer alignment groove formed in the outer part, the alignment of the outer bolt hole and the inner bolt hole is also performed. It can be done. Alternatively, if the locking piece on which the bolt guide hole is formed is installed corresponding to the position of the inner bolt hole, the position of the inner bolt hole can be checked based on the bolt guide hole when the outer portion is installed.

1 is a view for explaining a conventional duct socket.
Figure 2 is a view showing the side and front of a conventional duct socket
Figure 3 is an exploded perspective view for explaining a duct socket according to an embodiment of the present invention.
Figure 4 is a perspective view for explaining the inner portion in the duct socket shown in Figure 3;
5 is a view for explaining a state in which the inner alignment groove and the outer alignment groove are aligned with each other in the duct socket shown in FIG. 3;
6 is a view for explaining a state in which the inner side is folded to install the duct socket shown in FIG. 3 in the duct.
7 is a view for explaining a state of temporarily fixing the inner portion in the duct hole of the duct in the duct socket shown in FIG. 3;
8 is a view for explaining a state in which the outer portion coupled to the inner portion temporarily fixed to the duct in the duct socket shown in FIG. 3;
9 is a view for explaining a state in which the bolt holes are aligned when the outer part is coupled to the inner part in the duct socket shown in FIG. 3.
Figure 10 is a view for explaining a state in which the flexible hose is connected to the duct socket shown in Figure 3 is installed in the duct.
11 is an exploded perspective view for explaining a duct socket according to another embodiment of the present invention.
12 is a view for explaining a state of aligning the bolt hole in the outer portion when installing the duct socket shown in Figure 11 to the duct.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. However, some components irrelevant to the subject matter of the invention will be omitted or compressed, but the omitted components are not necessarily required in the present invention, and may be used in combination with those skilled in the art to which the present invention pertains. Can.

Figure 3 is an exploded perspective view for explaining the duct socket according to an embodiment of the present invention, Figure 4 is a perspective view for explaining the inner portion in the duct socket shown in FIG. 3 and 4, the duct socket (hereinafter referred to as a 'socket') according to an embodiment of the present invention includes an inner portion 10 and an outer portion 50 made of a metal material.

The inner portion 10 is configured to enter the duct 60 inside the duct hole 62 of the duct 60 and be supported around the duct hole 62. The inner portion 10 includes a first inner unit 20, a second inner unit 30, a locking piece 22 and a coupling means 40.

The first inner unit 20 is a first inner side extending radially from the rear end portions of the first inner extension portion 21 and the first inner extension portion 21 having a shape in which a circular tube is divided in half, that is, a semi-circular cross section. It has a flange portion 25. The second inner unit 30 has a second inner extension portion 31 and a second inner flange portion 35 in the same form as the first inner unit 20. That is, after the first inner unit 20 and the second inner unit 30 are manufactured in the same shape, both ends of the inner extension portions 21 and 31 face each other and then are coupled to each other. Only the inner unit 20 will be described in detail.

A seating jaw 24 is formed in a stepped shape at either end of both ends of the first inner extension portion 21. Therefore, the flat end (referring to the opposite end where the seating jaw 24 is formed) of the second inner extending portion 31 is seated on the seating jaw 24 of the first inner extending portion 21, and the second inner extending portion The flat end of the first inner extension portion 21 is seated on the seating jaw 24 of (31).

On the other hand, a locking piece 22 is installed at a plurality of points on the outer surface of the first inner extension portion 21. The thin plate-shaped locking piece 22 is fixed to the first inner extension portion 21 by a bolt or rivet in a state in close contact with the outer surface of the first inner extension portion 21. More specifically, the locking piece 22 is fixed to the first inner extension portion 21 by a bolt or rivet at a point biased toward the first inner flange portion 25 from the center of the longitudinal direction. Therefore, the opposite portion of the point where the locking piece 22 is fixed to the first inner extension portion 21 (the opposite portion in the direction of the first inner flange portion 25) is not attached to the first inner extension portion 21 and is separated. Therefore, when this portion of the engaging piece 22 is pulled, the engaging piece 22 can be deformed or bent while opening from the outer surface of the first inner extension portion 21.

The first inner flange portion 25 is a portion in close contact with the circumferential surface of the duct hole 62 of the duct 60, and the inner bolt hole 26 is formed at a plurality of points on the first inner flange portion 25. In addition, at both ends of the first inner flange portion 25, the hinge coupling portion 27 is formed in a protruding form so that the hinge 40 as a coupling means can be coupled. Therefore, the hinge 40 so that the hinge coupling portion 27 of the first inner flange portion 25 and the hinge coupling portion 27 of the second inner flange portion 35 face both hinge coupling portions 27 while facing each other. When is installed, the first inner flange portion 25 and the second inner flange portion 35 are coupled to each other in a rotatable state. When the inner bolt hole 26 is formed at the mid-center point between the locking pieces 22, the center point between the locking pieces 22 is aligned with the inner part 10 to align the bolt 50 to the inner part 10 later. Since it is understood that the bolt hole 26 of (10) is located, it can be used as a standard for alignment when fastening the bolt, which is convenient.

Of course, in the present embodiment, the hinge 40 is applied as a coupling means so that the first inner unit 20 and the second inner unit 30 can be foldable or unfoldable. Means may be applied.

In the first inner unit 20 and the second inner unit 30, which are manufactured in the same shape as each other, both ends of the inner extension portions 21 and 31 face each other, and then hinge 40 to the hinge coupling portion 27. When combined, the first inner extension portion 21 and the second inner extension portion 31 form a cylindrical shape, and the first inner unit 20 and the second inner unit 30 by the hinge 40 are coupled. It can be folded or unfolded. When the first inner unit 20 and the second inner unit 30 are unfolded, they are formed only to the point where the inner flange portions 25 and 35 are located on a flat surface and are not expanded anymore. Since such a structure is known, a detailed description is omitted.

The outer portion 50 includes a cylindrical outer extension portion 51 and an outer flange portion 55 extending radially from the rear end of the outer extension portion 51.

A through portion 52 is formed inside the outer extension portion 51. At this time, since the first inner extension portion 21 and the second inner extension portion 31 that form a cylindrical shape must enter when the inner portion 10 is unfolded, the diameter of the through portion 52 is the inner portion. When (10) is unfolded, the first inner extension portion 21 and the second inner extension portion 31 should be slightly larger than the maximum diameter of the cylinder.

In addition, a circumferential jaw 53 having a height higher than that of the periphery is protruded from the circumference of the opposite point where the outer flange portion 55 is formed among the circumferential surfaces of the outer extension portion 51. Between the flange portions 55, a seat portion 54 having a lower height than the periphery is formed.

Meanwhile, an outer bolt hole 56 is formed at a plurality of points on the outer flange portion 55. At this time, the position of the outer bolt hole 56 is formed at a position corresponding to the position of the inner bolt hole 26. For example, six outer bolt holes 56 are formed in the outer flange portion 55 at intervals of 60 degrees, and the first inner flange portion 25 and the second inner flange portion forming an annular shape while the inner portion 10 is unfolded Six inner bolt holes 26 may also be formed at intervals of 60 degrees at 35 degrees.

5 is a view for explaining a state in which the inner alignment groove and the outer alignment groove are aligned with each other in the duct socket shown in FIGS. 3 and 4.

That is, when the duct socket according to the embodiment of the present invention is installed in the duct 60, the inner portion 10 is first entered into the duct 60, and then the inner flange portions 25 and 35 are circumferential surfaces of the duct hole 62. And then, the outer portion 50 is coupled to the inner portion 10, and then the bolt 91 must be fastened. Outside the duct 60, the inner flange portion 25, 35 that enters the duct hole 62 inside. The inner bolt hole 26 is not visible. Accordingly, it may be difficult to align the positions of the outer bolt hole 56 and the inner bolt hole 26 with each other, for this purpose, as shown in FIG. 5, the alignment grooves 33 and the inner portion 10 and the outer portion 50, respectively, 58).

That is, in the inner portion 10, the second inner extension portion 31 of the second inner unit 30 is formed with a measurement length groove 33 having a predetermined length toward the opposite direction to the direction in which the second inner flange portion 35 is formed. It is done. The internal measuring column groove 33 is formed by a press-fitting method in a form protruding outwardly of the second inner extension portion 31. Of course, the inner measurement line groove 33 may be formed in the first inner extension portion 21.

In addition, an outer alignment groove 58 of a predetermined length is formed in the direction in which the outer flange portion 55 is formed in the outer extension portion 51 in the outer portion 50. The outer alignment groove 58 is also formed in a press-fitting manner so as to protrude outwardly from the outer extension portion 51.

In addition, the internal measuring line groove 33 and the outer alignment groove 58 are arranged so that the outer bolt hole 56 faces the inner bolt hole 26 when the outer portion 50 is coupled to the inner portion 10. It is formed by press-fitting. Therefore, when the inner portion 10 is first installed in the duct hole 62 and then the outer portion 50 is coupled, when the inner measuring groove 33 is aligned with the outer alignment groove 58, the entire inner side of the inner portion 10 The positions of the inner bolt holes 26 formed in the flange portions 25 and 35 and the positions of the outer bolt holes 56 of the outer flange portion 55 may all be aligned together.

Hereinafter, a process of installing a duct socket in a duct in the embodiment of the present invention described with reference to FIGS. 3 to 5 will be described with reference to FIGS. 6 to 10.

First, as shown in Figure 6, the inner portion 10 is folded to enter the duct hole 62 of the duct 60. The first inner extension portion 21 and the second inner portion of the duct 60 are slightly larger than the outer diameter of the cylinder formed by connecting the first inner extension portion 21 and the second inner extension portion 31 of the inner portion 10 to each other. A duct hole 62 through which the extension portion 31 can pass is formed. Here, even if the size of the duct hole 62 is formed larger than the cylinder formed by the inner extension portions 21 and 31, in the radially extending form of the inner extension portions 21 and 31 when the inner portion 10 is expanded. Due to the size of the formed inner flange portions 25 and 35, the inner portion 10 cannot be directly inserted into the duct hole 62.

Therefore, as shown in FIG. 6, the first inner unit 20 and the second inner unit 30, which are hinged 40 through the hinge coupling unit 27, are folded, so that the inner flange portions 25 and 35 are in close contact with each other. After making it possible to push the inner part 10 into the inside of the duct 60 through the duct hole 62, the inner part 10 does not get caught in the duct 60 and passes through the duct hole 62 to enter the duct 60 inside. Can be inserted into. When the inner portion 10 is inserted into the duct 60, the first inner unit 20 and the second inner unit so that the first inner extension portion 21 and the second inner extension portion 31 form a circular tube structure (30) unfolded, and when the inner extension portion (21,31) of the circular tube structure is exposed to the outside of the duct (60) through the duct hole (62), the inner flange portions (25,35) are around the duct hole (62). It is in close contact with the inner wall surface 61 of the.

7 is a view for explaining a state in which the inner extension portion of the inner portion is exposed to the outside of the duct through the duct hole. Referring first to FIGS. 3 and 7 (a), the inner extensions 21 and 31 are inserted to be exposed to the outside of the duct 60 through the duct hole 62, and the first inner unit 20 and The second inner unit 30 is hinged to each other, and when the force is unintentionally applied while working, the first inner unit 20 and the second inner unit 30 are slightly folded and the inner flange units 25,35 ) Does not form a completely flat surface, and thus, the inner flange portions 25 and 35 are slightly lifted up without being in close contact with the wall surface 61. In this case, when the bolting operation is performed later, the bolt alignment is poor and the operation becomes very difficult.

To this end, in this embodiment, a temporary fixing operation using the locking piece 22 is performed. That is, as shown in FIG. 7 (b), the part of the duct 60 is bent by bending a portion away from the inner extension portions 21 and 31 from the locking piece 22 having one point fixed to the inner extension portions 21 and 31. When folded so as to be in close contact with the outer wall surface 61, the folded hook piece 22 and the inner flange portions 25 and 35 of the duct socket firmly hold both wall surfaces 61 of the circumferential surface of the duct hole 62. do. Accordingly, the first inner unit 20 and the second inner unit 30 of the inner portion 10 are completely unfolded, and the inner flange portions 25 and 35 form a complete plane, and the wall surface around the duct hole 62 is formed. It can be temporarily fixed in a stable state without being separated from (61). In addition, since the wall surface 61 is formed of a porous sponge material that is somewhat compressed when an external force is applied, when the inner side 10 is inserted into the duct 60 and the hook piece 22 is bent, the bent portion of the hook piece is a duct ( 60) of the wall surface 61 is slightly bent and bent. Therefore, the inner portion 10 is prevented from rotating in the hole of the duct 60.

The reason why rotation prevention is important is that when the outer portion 50 is inserted into the inner extension portions 21 and 31 of the inner portion 10 later, the outer portion 50 eliminates the gap between the inner extension portions 21 and 31. In order to align both of them as closely as possible, in order to align the bolt holes 26 and 56 of the inner portion 10 and the outer portion 50, in this case, the outer portion 50 should be rotated slightly to align the outer portion 50 ) When the inner part rotates when rotating, it is very difficult to align the alignment of the bolt holes 26 and 56. Therefore, the present invention prevents the inner part 10 from being rotated in the hole of the duct 60 by digging around the hole of the duct 60 while the engaging piece 22 of the metal material is bent. Of course, the inner portion 10 can be rotated in the hole of the duct until the locking piece 22 is folded and fixed, so that the operator can position the inner portion 10 to the most optimal position as needed, and then the locking portion of the inner portion 10 By folding (22), the inner part 10 can be temporarily fixed to the duct.

Thereafter, as illustrated in FIG. 8, after installing the outer portion 50 such that the inner extension portions 21 and 31 of the circular tube structure are inserted into the through portion 52 of the outer portion 50, the outer side of the outer flange portion 55 is installed. When the bolt 91 is tightened to penetrate the bolt hole 56, the wall surface 61 of the duct 60, and the inner bolt hole 26 of the inner flange portions 25 and 35, the outer portion 50 and the inner portion ( 10) is firmly fixed to the duct (60).

At this time, when the inner flange portions 25 and 35 are located inside the duct 60, the inner bolt hole 26 is not visible by the wall surface 61 of the duct 60, so the outer bolt hole 56 and the inner bolt hole Alignment of the location of 26 may be difficult. However, as shown in Figure 5, the inner and outer portions are formed with an internal measuring column groove 33 and an outer alignment groove 58 protruding outward by a press-fitting method, before the bolt 91 is fastened. As shown in Fig. 9, while turning the outer portion 50 so that the inner alignment groove 33 is aligned so that the outer alignment grooves 58 are aligned with each other, the outer bolt hole 56 and the inner portion 10 of the outer portion 50 are aligned. The inner bolt holes 26 are also arranged to face each other, and when the bolts 91 are fastened as shown in FIG. 9 in this state, the positions of both bolt holes 26 and 56 are aligned, so that an accurate bolting operation is possible. .

On the other hand, after completing the installation of the duct socket through the above process, the end of the flexible hose 80, as shown in Figure 10 to surround the outer portion 50, the flexible hose 80 with the fixing band 90 outside When wound in and fixed, the flexible hose 80 is fixed to the socket. At this time, the fixing band 90 is preferably wound around the seating portion 54 of the outer extension portion 51. Accordingly, even if an external force is applied to the flexible hose 80, the fixing band 90 has a circumferential jaw 53 The entire flexible hose 80 is caught and prevented from coming out of the socket.

11 is a view for explaining a duct socket according to another embodiment of the present invention. The duct socket according to another embodiment of the present invention shown in FIG. 11 includes an inner portion 10 and an outer portion 50, and most of the configuration is the same as the duct socket described through FIGS. 3 to 10, but the inner portion 10 ), Only the locking pieces 22 'installed on the inner extension portions 21 and 31 are different.

That is, in the duct socket illustrated in FIG. 11, the locking pieces 22 ′ are fixedly installed at a plurality of points on the outer surfaces of the inner extension parts 21 and 31. Here, the bolt guide hole 23 is formed in the locking piece 22 '. The bolt guide hole 23 is a portion through which the bolt 91 inserted into the outer bolt hole 56 and the inner bolt hole 26 penetrates when a duct socket is subsequently installed in the duct 60. Therefore, when the engaging piece 22 'is installed on the inner extension portions 21 and 31, when the engaging piece 22' is bent, the bolt guide hole 23 is the inner bolt hole of the inner flange portions 25 and 35 ( 26).

Therefore, as shown in FIG. 12, when the inner part 10 is first installed in the duct hole 62 of the duct 60 in the duct socket and then the hook piece 22 'is bent, the inner bolt hole 26 is a duct ( 60) Even if it is not visible from the outside, it can be seen that the position of the bolt guide hole 23 of the locking piece 22 'faces the inner bolt hole 26, so that the inner portion 10 is formed in the through portion 52 of the outer portion 50. ), The outer bolt hole 56 and the outer bolt hole 56 of the outer flange portion 55 are turned to come to the position of the bolt guide hole 23 of the locking piece 22 ', the outer bolt hole 56 and the inner side The alignment of the bolt holes 26 is made. Therefore, without having to form separate alignment grooves 33 and 58, after aligning the position of the outer bolt hole 56 of the outer portion 50 with the bolt guide hole 23 position of the locking piece 22 ', the bolt ( Tightening 91), the bolt 91 is the outer bolt hole 56 of the outer flange portion 55, the bolt guide hole 23 of the locking piece 22 ', the wall surface 61 of the duct 60, and Since the inner bolt holes 26 of the inner flange portions 25 and 35 can be sequentially passed through, alignment and tightening can be conveniently performed.

As described in detail above, according to the duct socket according to the present invention, the inner portion 10 is folded and passed through the duct hole 62 of the duct 60 so that it can be unfolded in its original shape to install the socket in the duct 60 The work to be done is simple, and the socket is firmly coupled to the duct 60, so that the socket is not separated from the duct 60 at a certain level of external force, and maintains the fastening state, thereby exhibiting excellent sealing performance.

In addition, when the inner part 10 is first installed in the duct 60, the hook pieces 22 and 22 'installed in the inner extension part are bent, and the hook pieces 22 and 22' are formed on both sides of the wall surface 61 of the duct 60. ) And the inner flange portions 25 and 35 may be closely supported and temporarily fixed. That is, when the inner portion 10 is installed first, the inner portion 10 is inclined by the load of the inner flange portion, so that the inner flange portions 25 and 35 may be opened on the wall surface 61 of the duct 60. When the pieces 22 and 22 'are bent and fixed, the inner flange portions 25 and 35 and the wall surfaces 61 of the duct 60 can maintain a level with each other. In the state where the flange portions 25 and 35 and the wall surface 61 are horizontal, the bolt 91 may be correctly entered.

On the other hand, when the inner portion 10 enters the inside of the duct 60 and the inner flange portions 25 and 35 come into close contact around the duct hole 62, the inner bolt hole formed in the inner flange portions 25 and 35 from the outside 26 becomes invisible. Therefore, the operation of aligning the positions of the outer bolt hole 56 of the outer portion 50 and the inner bolt hole 26 of the inner portion 10 may not be easy, but the internal measuring column groove 33 formed in the inner portion 10 is the outer portion ( When aligned to the outer alignment grooves 58 formed in the 50), the alignment of the positions of the outer bolt hole 56 and the inner bolt hole 26 may also be performed. Alternatively, if the locking piece 22 'on which the bolt guide hole 23 is formed is installed in correspondence with the position of the inner bolt hole 26, the inner bolt hole based on the bolt guide hole 23 when installing the outer portion 50 ( 26) can be checked.

The above-described preferred embodiments of the present invention are disclosed for the purpose of illustration, and those skilled in the art having ordinary knowledge of the present invention will be able to make various modifications, changes and additions within the spirit and scope of the present invention. And additions should be considered to fall within the scope of the claims of the present invention.

10: inner part
20: first inner unit
21: first internal extension
22,22 ': Jam
23: bolt guide
24: seating chin
25: first inner flange portion
26: inner bolt ball
27: hinge coupling
30: second inner unit
31: second internal extension
33: internal measuring groove
35: second inner flange portion
40: hinge
50: outer part
51: outer extension
52: through portion
53: circumference
54: seating
55: outer flange
56: outer bolt ball
58: outer alignment groove
60: duct
61: wall surface
62: duct hole
80: flexible hose
90: fixed band
91: bolt

Claims (4)

An inner portion inserted into a duct hole of the duct and fixed to a wall surface around the duct hole; And
It is fixed to the inner portion outer portion is coupled to the flexible hose; includes,
The inner portion,
A first inner unit having a first inner extension portion having a semi-circular cross section and extending in one direction, and a first inner flange portion formed radially extending at ends of the first inner extension portion and having inner bolt holes at a plurality of points;
A second inner unit having a second inner extension portion having a semi-circular cross section and extending in one direction, and a second inner flange portion extending radially at the ends of the second inner extension portion and having inner bolt holes formed at a plurality of points;
A locking piece installed to be bendable at a plurality of points on the outer surfaces of the first inner extension portion and the second inner extension portion; And
Coupling means for coupling the first inner unit and the second inner unit to be unfoldable or collapsible, with both ends of the first inner extension of the first inner unit and the second inner extension of the second inner unit facing each other ;
The outer portion,
The first inner extension portion and the second inner extension portion is formed with a through portion through which the outer extension portion is formed, and a flexible hose is coupled around the outer surface; And
Includes; the outer flange portion is formed extending in the radial direction at the end of the outer extension portion and the outer bolt hole is formed at a plurality of points;
After folding the first inner unit and the second inner unit of the inner part and pushing the inner part into the inside of the duct through the duct hole of the duct, the first inner unit and the second inner unit are unfolded to extend the first inner unit. When the portion and the second inner extension portion are exposed to the outside of the duct through the duct hole, the first inner flange portion and the second inner flange portion are in close contact with the inner wall surface around the duct hole, and the hook piece is bent to bend the When folded so as to be in close contact with the outer wall surface, the locking piece and the first inner flange portion and the second inner flange portion are fixed to hold firmly on both walls of the circumferential surface of the duct hole, and are temporarily fixed. After the second inner extension portion is inserted into the through portion of the outer extension portion, when the bolt is tightened to extend from the outer bolt hole to the inner bolt hole, the inner portion Duct socket, characterized in that the outer region is fixed to the duct.
According to claim 1,
Duct socket, characterized in that a seating jaw is formed on one end of either of the first inner extension portion and the second inner extension portion, the flat end of the opposing inner extension portion is seated.
According to claim 1,
Duct socket, characterized in that the outer circumference of the outer extension portion is formed with a circumferential jaw preventing the flexible hose from falling out.
According to claim 1,
A bolt guide hole is formed in the engaging piece, and the engaging piece is installed at a position corresponding to a point where the inner bolt hole is formed, and when the engaging piece is bent, the bolt guide hole and the inner bolt hole face the duct. socket.

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