SIDE BRACKET

A side bracket is proposed. The side bracket includes: a lower side bracket disposed under a square bar and having an open structure formed opposite to a predetermined section of a rectangular section by bending both edge sections positioned around the predetermined section; a tightener disposed through the lower side bracket and opening or closing the open structure of the lower side bracket; an upper side bracket being formed as a rectangular pipe, surrounding the square bar, and rotating on the lower side bracket with respect to the predetermined section of the rectangular section; and a horizontal fastener and a vertical fastener being in contact with the square bar through a side and another side of the upper side bracket, respectively.

CROSS REFERENCE TO RELATED APPLICATION

The present application claims priority to Korean Patent Application No. 10-2020-0004036, filed Jan. 13, 2020, the entire contents of which is incorporated herein for all purposes by this reference.

BACKGROUND OF THE INVENTION

Field of the Invention

The present disclosure relates to a side bracket disposed on a linear structure of a ceiling of a building and holding a square bar, which is combined with a reducer, across the reducer to stably suspend the reducer and a sprinkler head, which are sequentially disposed from a horizontal pipe of the ceiling, from the horizontal pipe.

Description of the Related Art

In general, buildings have a plurality of floors, in which a horizontal pipe is installed each floor and a vertical pipe connects the horizontal pipes of adjacent floors. The vertical pipes are installed along the side walls of a building and send water to horizontal pipes. The horizontal pipe is installed in the ceiling of each floor and supplies water to the available water facility of each floor.

Accordingly, the horizontal pipe sequentially supplies water to a reducer and a sprinkler head through a new pipeline in consideration of the ceiling structure in the fireproof facility of the available water facility. The ceiling structure may be a T-grid ceiling type or a pipe ceiling type.

When the ceiling is finished in the T-grid ceiling type, a square bar is fixed to T-bars facing each other of four T-bars surrounding a rectangular area selected from the T-grid ceiling, and then the reducer is fixed to the square bar between the T-bars facing each other of the four T-bars.

When the ceiling is finished in the pipe ceiling type, a square bar is fixed to two pipes of a plurality of pipes in the pipe ceiling, and then the reducer is fixed to the square bar between the two pipes. The square bar may be fixed to an individual T-bar or an individual pipe with an annular center bracket fitted or may be fixed to an individual T-bar or an individual pipe and then fitted to a center bracket having a lock shape.

Further, the square bar is fixed to an individual T-bar or an individual pipe through a side bracket and the reducer is fixed to the square bar through a center bracket. Accordingly, the sprinkler head is fixed to the square bar through the reducer on the ceiling. However, since the side bracket is a single structure, the side bracket is positioned only to straightly face two T-bars or two pipes when supporting a square bar on the two T-bars or the two pipes.

Accordingly, the square bar is fixed to an individual side bracket through an individual side bracket, so the square bar cannot be installed obliquely with respect to the arrangement direction of the side brackets, on two T-bars or tow pipes. In order to appropriately divide spaces in each floor of the building, the ceiling structure is usually required to enable a square bar to be installed obliquely with respect to the direction in which a side bracket is disposed.

Unless the ceiling structure is changed, the shape of the square bar should be changed between adjacent side brackets straightly facing each other so that a reducer is fixed to the square bar. To this end, the square bar undergoes an additional machining process, which increases the installation cost of a sprinkler head. A technology similar to the side bracket has been disclosed in Korean Patent No. 10-1418791 in the related art.

SUMMARY OF THE INVENTION

The present disclosure has been made in an effort to solve the problems in the related art and an objective of the present disclosure is to provide a side bracket, which is configured such that when the ceiling of a building is finished in a T-grid ceiling type or a pipe ceiling type, the side brackets are disposed on two T-bars or two pipes to face each other straightly or obliquely, thereby being suitable for freely determining the direction in which a square bar, which connects the two T-bars or two pipes to each other, is disposed.

In order to accomplish the above objective, the present disclosure provides a side bracket disposed on linear structures of a ceiling of a building and holding a square bar, which is combined with a reducer, across the reducer to stably suspend the reducer and a sprinkler head, which are sequentially disposed from a horizontal pipe of the ceiling, from the horizontal pipe, the side bracket including: a lower side bracket disposed under the square bar and having an open structure formed opposite to a predetermined section of a rectangular section by bending both edge sections positioned around the predetermined section; a tightener disposed through the lower side bracket and opening or closing the open structure of the lower side bracket; an upper side bracket being formed as a rectangular pipe, surrounding the square bar, and rotating on the lower side bracket with respect to the predetermined section of the rectangular section; and a horizontal fastener and a vertical fastener being in contact with the square bar through a side and another side of the upper side bracket, respectively, in which when the lower side brackets are disposed on two linear of the ceiling through the open structure, the lower side brackets face each other straightly or obliquely on the two linear structures; a connection hole is formed at the predetermined section of the rectangular section; the upper side bracket has a pipe body configured to surround the square bar in a rectangular shape, a rotary pipe integrally formed with the pipe body, inserted in the connection hole of the lower side bracket to be rotatably coupled to the connection hole of the lower side bracket, a horizontal hole formed perpendicular to the rotary pipe through a side of the pipe body and communicating with the rotary pipe through an inside of the pipe body, and a vertical hole formed through another side of the pipe body to straightly face the rotary pipe and communicating with the rotary pipe through the inside of the pipe body, wherein the upper side brackets face each other on the lower side brackets in an arrangement direction of the lower side brackets on the two linear structures.

The lower side bracket may include: a first elastic plate and a second elastic plate facing each other in both edge sections of the rectangular section; the first elastic plate and the second elastic plate may have the same length from the predetermined section of the rectangular section; and the first elastic plate and the second elastic plate each may have a tightener hole.

The first elastic plate and the second elastic plate each may have two beads formed in a shape of two closed hands when they go with one width away from the predetermined section of the rectangular section, and the tightener hole formed between the two beads.

The first elastic plate and the second elastic plate each may include: two beads formed in a shape of two closed hands when they go with two widths away from a predetermined section of the rectangular section; the tightener hole formed between the two beads; an elastic hole formed at a side of the tightener hole; and a pressing burring protruding toward an area between the first elastic plate and the second elastic plate from an inlet of the elastic hole.

The first elastic plate and the second elastic plate may be bent toward each other in several steps as they go away from the predetermined section of the rectangular section such that a width between the first elastic plate and the second elastic plate gradually decreases, and the first elastic plate and the second elastic plate may be closer to each other with a gap therebetween at an opposite side of the predetermined section than at the predetermined section of the rectangular section, thereby forming the open structure.

The tightener may be inserted in the tightener holes of the first elastic plate and the second elastic plate and may be thread-fastened to the first elastic plate and the second elastic plate.

The lower side bracket may include a first elastic plate and a second elastic plate facing each other in the both edge sections of the rectangular section, and a third elastic plate disposed between the first elastic plate and the second elastic plate and connecting the first elastic plate and the second elastic plate, in which the first elastic plate may be smaller in length than the second elastic plate from the predetermined section of the rectangular section, wherein the first elastic plate and the second elastic plate each may have an inner tightener hole, the third elastic plate may have the same shape as the second elastic plate at a portion, which is not in contact with the first elastic plate, as the third elastic plate goes away from the first elastic plate, and the third elastic plate may have an outer tightener hole.

The first elastic plate and the second elastic plate may respectively have beads formed in an inverse U-shape on the first elastic plate and the second elastic plate as they go with one width away from the predetermined section of the rectangular section, and the inner tightener holes respectively formed under the bead of the first elastic plate and surrounded by the bead of the second elastic plate; the first elastic plate and the third elastic plate may respectively have a coupling hole formed at the first elastic plate to receive a coupling protrusion of the third elastic plate, and the outer tightener hole formed at the third elastic plate to face the inner tightener hole of the first elastic plate when the first elastic plate and the third elastic plate are in contact with each other; and the second elastic plate and the third elastic plate may be configured such that a hook of the third elastic plate is inserted in a hook hole of the second elastic plate, so the hook of the third elastic plate may be freely rotated in the hook hole of the second elastic plate.

The first elastic plate and the second elastic plate may respectively have beads formed in an inverse U-shape on the first elastic plate and the second elastic plate as they go with two widths away from a predetermined section of the rectangular section, the inner tightener holes respectively formed under the bead of the first elastic plate and surrounded by the bead of the second elastic plate, and a pressing burring formed at an inlet of one of elastic holes formed at both sides of the inner tightener hole of the second elastic plate unlike both sides of the inner tightener hole of the first elastic plate; the first elastic plate and the third elastic plate may respectively have a coupling hole formed at the first elastic plate to receive a coupling protrusion of the third elastic plate, and the outer tightener hole formed at the third elastic plate to face the inner tightener hole of the first elastic plate when the first elastic plate and the third elastic plate are in contact with each other; and the second elastic plate and the third elastic plate may be configured such that a hook of the third elastic plate is inserted in a hook hole of the second elastic plate, so the hook of the third elastic plate may be freely rotated in the hook hole of the second elastic plate.

The second elastic plate and the third elastic plate may be bent away from each other as they go away from the predetermined section of the rectangular section to form a circular space between the second elastic plate and the third elastic plate, and each may have a pad hole and a pad seat surrounding the pad hole; and the third elastic plate may be separably coupled to the first elastic plate and rotatably coupled to the second elastic plate, thereby forming the open structure together with the first elastic plate and the second elastic plate.

The tightener may be inserted in the inner tightener holes of the first elastic plate and the second elastic plate, and the outer tightener hole of the third elastic plate, and may be thread-fastened to the first elastic plate, the second elastic plate, and the third elastic plate.

The pipe body may be rotated around the rotary pipe on the lower side bracket with the rotary pipe of the upper side bracket inserted through the connection hole of the lower side bracket.

The horizontal fastener and the vertical fastener may be inserted in the horizontal hole formed through a side of the pipe body and the vertical hole formed through another side of the pipe body, respectively, and may be thread-fastened to the pipe body, thereby pressing the square bar to the pipe body in contact with the square bar in the pipe body.

When the ceiling is a T-grid ceiling and four T-bars surrounding one rectangular area of the T-grid ceiling are provided as the linear structures, the lower side brackets may be disposed to straightly face each other or to obliquely face each other on two T-bars facing each other of the four T-bars; each may surround an upper body of an individual T-bar through the first elastic plate and the second elastic plate; and each may expose a lower body under the upper body of the individual T-bar through the open structure of the first elastic plate and the second elastic plate.

When the ceiling is a pipe ceiling and several pipes are the linear structures of the pipe ceiling, the lower side brackets may be disposed on two pipes of the several pipes to face each other straightly or obliquely, and each may surround or release an individual pipe through the open structure formed by the first elastic plate to third elastic plates.

According to the side bracket of the present disclosure, when a ceiling structure is finished in a T-grid ceiling type or a pipe ceiling type, lower side brackets are disposed on two T-bars or two pipes to face each other straightly or obliquely. Further, upper brackets are positioned in the directions in which the lower side brackets are disposed, on the two T-bars or the two pipes by rotating on the lower side brackets with respect to the lower side brackets. Accordingly, it is possible to freely determine the direction of a square bar that connects the two T-bars or the two pipes to each other on the two T-bars or the two pipes.

DETAILED DESCRIPTION OF THE INVENTION

Exemplary embodiments of the present disclosure are described in detail with reference to the accompanying drawings so that those skilled in the art can easily achieve the present disclosure.

FIG. 1shows a side bracket according to a first embodiment of the present disclosure in several side views (a left side view, a front view, and a right side view), andFIG. 2is an exploded view of the side bracket shown inFIG. 1.

Referring toFIGS. 1 and 2, in order to stably suspend a reducer (not shown) and a sprinkler head (not shown), which are sequentially disposed from a horizontal pipe (not shown) of the ceiling of a building, from a horizontal pipe, a side bracket94is disposed on linear structures (214and218inFIG. 1) of the ceiling and holds a square bar (224or228), which is combined with the reducer, across the reducer.

To this end, the side bracket94includes a lower side bracket24, a tightener30, an upper side bracket60, a horizontal fastener74, and a vertical fastener78. Roughly speaking, the lower side bracket24, as shown inFIGS. 9 and 10, is disposed under a square bar224or228and has an open structure (described below) formed opposite to a predetermined section of a rectangular section by bending both edge sections positioned around the predetermined section.

The tightener30is disposed through the lower side bracket94and opens/closes the open structure of the lower side bracket94. The upper side bracket60, as shown inFIG. 10, is a rectangular pipe, surrounds the square bar224or228, and rotates on the lower side bracket24with respect to the predetermined section of the rectangular section. The horizontal fastener74and the vertical fastener78come in contact with the square bar224or228through a side and another side of the upper side bracket60, respectively.

Referring toFIGS. 9 and 10, when the lower side brackets24are disposed on two linear structures214and218of a ceiling through the open structure, the lower side brackets24face each other straightly or obliquely on the two linear structures214and218. Further, the upper side brackets60face each other on the lower side brackets24in the arrangement direction of the lower side brackets24on the two linear structures214and218.

In detail, referring toFIGS. 1 and 2, the lower side bracket24has a connection hole (9inFIG. 2) receiving a rotary pipe (52inFIG. 2) of the upper side bracket60and guiding rotation of the rotary pipe52in the predetermined section of the rectangular section, and includes a first elastic plate14and a second elastic plate19facing each other in both edge sections of the rectangular section. The first elastic plate14and the second elastic plate19have the same length from the predetermined section of the rectangular section, as shown inFIG. 1 or 2.

The first elastic plate14and the second elastic plate19, as shown inFIG. 1, each have two beads13or18formed in the shape of two closed hands when they go with one width away from the predetermined section of the rectangular section, and a tightener hole3or6between the two beads13or18.

The first elastic plate14and the second elastic plate19, as shown inFIG. 1 or 2, are bent toward each other in several steps as they go away from the predetermined section of the rectangular section such that the width between the first elastic plate14and the second elastic plate19gradually decreases. Further, the first elastic plate14and the second elastic plate19are closer to each other with a gap therebetween at the opposite side of the predetermined section than at the predetermined section of the rectangular section, thereby forming the open structure. That is, the first elastic plate14and the second elastic plate19forms a forceps-shaped open structure at the opposite side of the predetermined section of the rectangular section.

The tightener30, referring toFIGS. 1 and 2, is inserted in the tightener hole3of the first elastic plate14and the tightener hole6of the second elastic plate19and is thread-fastened to the first elastic plate14and the second elastic plate19. The upper side bracket60, as shown inFIG. 2, has a rotary pipe52, a horizontal hole54, a vertical hole56, and a pipe body58. First, the pipe body58, as shown inFIG. 10 or 11, is configured to surround a square bar224or228in a rectangular shape.

The rotary pipe52, referring toFIGS. 1 and 2, is integrally formed with the pipe body58, is inserted in the connection hole9of the lower side bracket24to be rotatably coupled to the connection hole9of the lower side bracket24. The horizontal hole54of the pipe body58, as shown inFIG. 2, is formed perpendicular to the rotary pipe52through a side of the pipe body58, thereby communicating with the rotary pipe52through the inside of the pipe body58.

The vertical hole56of the pipe body58, as shown inFIG. 2, is formed through another side of the pipe body58to straightly face the rotary pipe52, thereby communicating with the rotary pipe52through the inside of the pipe body58. Referring toFIGS. 1 and 2, the pipe body58is rotated around the rotary pipe52(see R1inFIG. 10) on the lower side bracket24with the rotary pipe52of the upper side bracket60inserted through the connection hole9of the lower side bracket24.

The horizontal fastener74and the vertical fastener78, referring toFIGS. 1, 2, 10, and 11, are inserted in the horizontal hole54formed through a side of the pipe body58and the vertical hole56formed through another side of the pipe body58, respectively, and are thread-fastened to the pipe body58, thereby pressing the square bar224or228to the pipe body58in contact with the square bar224or228in the pipe body58.

FIG. 3is an exploded view showing a side bracket according to a second embodiment of the preset disclosure.

Referring toFIG. 3, a side bracket98has a similar structure to the side bracket94shown inFIG. 2, but the lower side bracket28of the side bracket98has a different structure from the lower side bracket24of the side bracket94shown inFIG. 2. In detail, the lower side bracket28also includes a first elastic plate14A and a second elastic plate19A facing each other in both edge sections positioned around a predetermined section of a rectangular section.

However, the first elastic plate14A and the second elastic plate19A each have two beads (13or18inFIG. 1) formed in the shape of two closed hands when they go with two widths away from a predetermined section of the rectangular section, a tightener hole (3or6inFIG. 2) between the two beads13or18, an elastic hole (11or16inFIG. 1) at a side of the tightener hole3or6, and a pressing burring (12or17inFIG. 1) protruding toward the area between the first elastic plate14A and the second elastic plate19A from an inlet of the elastic hole11or16.

The pressing burring12or17, though not shown inFIG. 10, presses the upper body212of a T-bar214or218between the first elastic plate14A and the second elastic plate19A when the tightener30is thread-fastened to the first elastic plate14A and the second elastic plate19A.

FIG. 4shows a side bracket according to a third embodiment of the present disclosure in several side views (a left side view, a front view, and a right side view), andFIG. 5is an exploded view of the side bracket shown inFIG. 4.

Referring toFIGS. 4 and 5, a side bracket204has a similar structure to the side bracket94shown inFIG. 1, but the lower side bracket144and the tightener150of the side bracket204have a different combination relationship from the lower side bracket24and the tightener30of the side bracket94shown inFIG. 1.

In detail, the lower side bracket144, referring toFIGS. 4 and 5, has a connection hole119receiving a rotary pipe162of the upper side bracket170and guiding rotation of the rotary side bracket162in a predetermined section of the rectangular section.

The lower side bracket144, as shown inFIG. 5, includes a first elastic plate123and a second elastic plate129facing each other in both edge sections of the rectangular section, and a third elastic plate139disposed between the first elastic plate123and the second elastic plate129and connecting the first elastic plate123and the second elastic plate129.

The first elastic plate123, as shown inFIGS. 5 and 6, is smaller in length than the second elastic plate129from the predetermined section of the rectangular section. The third elastic plate139, as shown inFIG. 5, has the same shape as the second elastic plate129at the portion, which is not in contact with the first elastic plate123, as it goes away from the first elastic plate123.

The first elastic plate123and the second elastic plate129, as shown inFIG. 4, respectively have: beads121and128formed in an inverse U-shape on the first elastic plate123and the second elastic plate129as they go with one width away from the predetermined section of the rectangular section; and inner tightener holes113and116respectively formed under the bead121of the first elastic plate123and surrounded by the bead128of the second elastic plate129.

The first elastic plate123and the third elastic plate139, as shown inFIGS. 4 and 5, respectively have a coupling hole123formed a the first elastic plate123to receive a coupling protrusion137of the third elastic plate139, and an outer tightener hole135formed at the third elastic plate139to face the inner tightener hole113of the first elastic plate123when the first elastic plate123and the third elastic plate139are in contact with each other.

The second elastic plate129and the third elastic plate139, as shown inFIGS. 5 to 7, are configured such that a hook133,134of the third elastic plate139is inserted in a hook hole H of the second elastic plate129. The hook133,134of the third elastic plate139is freely rotated in the hook hole H of the second elastic plate129.

Further, referring toFIGS. 4 and 5, the second elastic plate129and the third elastic plate139are bent away from each other as they go away from the predetermined section of the rectangular section, whereby a circular space is defined between the second elastic plate129and the third elastic plate139. Further, the second elastic plate129and the third elastic plate139each have a pad hole124or131and a pad seat125or132surrounding the pad hole124or131.

A rubber pad (not shown) is seated in the pad seat125or132of the second elastic plate129and the third elastic plate139, thereby preventing a pipe (234or238inFIG. 11) from idling over the pad seat125or132. Referring toFIGS. 4 to 7, the third elastic plate139is separably coupled to the first elastic plate123and rotatably coupled to the second elastic plate129, thereby forming an open structure together with the first elastic plate123and the second elastic plate129.

That is, the third elastic plate139is separably coupled to the first elastic plate123between the first elastic plate123and the second elastic plate129, thereby forming an annular open structure together with the first elastic plate123and the second elastic plate129. The tightener150, referring toFIGS. 4 to 6, is inserted in the inner tightener hole113of the first elastic plate123, the inner tightener hole116of the second elastic plate129, and the outer tightener hole135of the third elastic plate139, and is thread-fastened to the first elastic plate123, the second elastic plate129, and the third elastic plate139.

The upper side bracket170, as shown inFIG. 5, has a rotary pipe162, a horizontal hole164, a vertical hole166, and a pipe body168. The rotary pipe162, the horizontal hole164, the vertical hole166, and the pipe body168have the same shapes and functions as the rotary pipe52, the horizontal hole54, the vertical hole56, and the pipe body58of the upper side bracket60shown inFIG. 2.

FIG. 8is an exploded view showing a side bracket according to a fourth embodiment of the preset disclosure.

Referring toFIG. 8, a side bracket208has a similar structure to the side bracket204shown inFIG. 5, but the lower side bracket148of the side bracket208has a different structure from the lower side bracket144of the side bracket204shown inFIG. 5. Similarly, the lower side bracket148also has first to third elastic plates123A,129A, and139A.

The first elastic plate123A and the second elastic plate129A respectively have: beads (121and128inFIG. 4) formed in an inverse U-shape on the first elastic plate123A and the second elastic plate129A as they go with two widths away from a predetermined section of the rectangular section; inner tightener holes (113and116inFIG. 5) respectively formed under the bead121of the first elastic plate123A and surrounded by the bead128of the second elastic plate129A; and a pressing burring (126inFIG. 4orFIG. 8) formed at an inlet of one of elastic holes (127inFIG. 4) formed at both sides of the inner tightener hole128of the second elastic plate129A unlike both sides of the inner tightener hole113of the first elastic plate123A.

The pressing burring126, though not shown inFIG. 11, presses an individual pipe234or238between the first elastic plate123A and the second elastic plate129A when the tightener150is thread-fastened to the first elastic plate123A, the second elastic plate129A, and the third elastic plate139A.

The first elastic plate123A and the third elastic plate139A respectively have: a coupling hole (122inFIG. 4) for receiving a coupling protrusion (137inFIG. 4) of the third elastic plate139A inside the first elastic plate123A, and an outer tightener hole135formed through the third elastic plate139A to face the inner tightener hole113of the first elastic plate123when the first elastic plate123A and the third elastic plate139A are in contact with each other.

The second elastic plate129A and the third elastic plate139A are configured such that a hook133,134of the third elastic plate139A is inserted in a hook hole H of the second elastic plate129A. The hook133,134of the third elastic plate139A is freely rotated in the hook hole H of the second elastic plate129A.

FIGS. 9 to 11are schematic views showing a method of using the side brackets shown inFIGS. 1 to 4.

Referring toFIGS. 9 and 10, the side bracket94shown inFIG. 1may be prepared. The side bracket94includes the lower side bracket24, the tightener30, the upper side bracket60, the horizontal fastener74, and the vertical fastener78. The lower side bracket24, the tightener30, the upper side bracket60, the horizontal fastener74, and the vertical fastener78were sufficiently described with reference toFIGS. 1 and 2.

When the ceiling of a building is a T-grid ceiling and four T-bars surrounding one rectangular area of the T-grid ceiling are provided as linear structures (described with reference toFIGS. 1 and 2), the lower side brackets24may be disposed at seat positions P1and P2to straightly face each other or at seat positions P1and P3to obliquely face each other on two T-bars214and218facing each other of the four T-bars.

In this case, the lower side bracket24can surround the upper body212of the individual T-bar214or218through the first elastic plate14and the second elastic plate19, and the lower body211under the upper body212of the individual T-bar214or218can be exposed through the open structure of the first elastic plate14and the second elastic plate19. Next, the tightener30may be put through the first elastic plate14and the second elastic plate19.

The tightener30is thread-fastened to the first elastic plate14and the second elastic plate19, thereby increasing or decreasing the width between the first elastic plate14and the second elastic plate19. Next, the upper side bracket60is placed on the lower side bracket24and can be rotated (R1) with respect to the lower side bracket24through the rotary pipe52. The rotation (R1) of the upper side bracket60is performed to align the upper side bracket60with the lower side bracket24.

Next, a square bar224or228may be put through the upper side bracket60on the individual T-bar214or218. Next, the square bar224or228may be fixed inside the upper side bracket60by the horizontal fastener74and the vertical fastener78tightened through the upper side bracket60. Accordingly, the square bar224or228, as shown inFIG. 9, can be positioned perpendicularly or obliquely to the two T-bars214and218.

Referring toFIGS. 9 and 11, the side bracket204shown inFIG. 4may be prepared. The side bracket204includes the lower side bracket144, the tightener150, the upper side bracket170, the horizontal fastener184, and the vertical fastener188. The lower side bracket144, the tightener150, the upper side bracket170, the horizontal fastener184, and the vertical fastener188were sufficiently described with reference toFIGS. 4 to 7.

When the ceiling of a building is a pipe ceiling and several pipes are linear structures of the pipe ceiling, the lower side brackets144may be disposed on two pipes234and238of the several pipes to face each other straightly or obliquely. It is assumed that the two pipes234and238replace the two T-bars214and218shown inFIG. 9.

The lower side bracket144can surround or release an individual pipe234through the open structure formed by the first to third elastic plates123,129, and139. This is because the third elastic plate139is rotatably coupled to the second elastic plate129and separably coupled to the first elastic plate123. Next, the tightener150may be put through the first elastic plate123, the second elastic plate129, and the third elastic plate139.

The tightener150is thread-fastened to the first elastic plate123, the second elastic plate129, and the third elastic plate139, thereby increasing or decreasing the width between the first elastic plate123and the second elastic plate129. Next, the upper side bracket170is placed on the lower side bracket144and can be rotated (R2) with respect to the lower side bracket144through the rotary pipe162. The rotation (R2) of the upper side bracket170is performed to align the upper side bracket170with the lower side bracket144.

Next, a square bar224or228may be put through the upper side bracket170on the individual pipe234or238. Next, the square bar224or228may be fixed inside the upper side bracket170by the horizontal fastener184and the vertical fastener188tightened through the upper side bracket170. Accordingly, the square bar224or228can be positioned perpendicularly or obliquely to the two pipes234and238.