KR102324856B1 - Wire tray for preventing wire separation provided in buildings - Google Patents

Abstract

The present invention relates to a wire tray for preventing separation of a wire provided in a building, including: a tray body (100) for bracing and supporting an installed wire (L), fixing the installed wire (L) so as not to be separated during an elevating process, and fixing an additionally installed wire (L); an elevating unit (200) installed on a ceiling of the building so as to be located on upper portions of front and rear ends of the tray body (100), and detachably coupled to the tray body (100) to elevate the tray body (100); a fixing unit (300) installed on the ceiling of the building so as to be disposed between a pair of elevating units (200) to fix and release the tray body (100) elevated by the elevating unit (200); an elevating input unit (400) for outputting an operation signal so that an expansion/contraction driving unit (210) is operated; a rotation input unit (500) for outputting an operation signal so that a connector driving unit (230) is operated; a loosening input unit (600) for outputting an operation signal so that a solenoid (340) is operated; and a control unit (700) for receiving the operation signal from the elevating input unit (400) to control an operation of the expansion/contraction driving unit (210), receiving the operation signal from the rotation input unit (500) to control an operation of the connector driving unit (230), and receiving the operation signal from the loosening input unit (600) to control an operation of the solenoid (340). Accordingly, separation and falling of the installed wire during an elevating work are prevented, and particularly, a wire is able to be additionally installed to fundamentally resolve an inconvenience of additionally installing a tray.

Description

Wire tray for preventing wire separation provided in buildings

The present invention relates to a wire tray for preventing wire separation provided in a building, and more specifically, it is possible to prevent the problem of falling while the wire installed during the lifting operation is separated, and in particular, additional installation of the tray is possible because it is possible to additionally extend the wire It relates to a wire tray for preventing wire separation provided in a building that can avoid the hassle of having to do it.

In general, a cable tray is used as a mechanism for supporting an electric wire.

The cable tray refers to a solid structure composed of a unit made of metal or non-combustible material used to support a cable or a unit assembly and accessories attached thereto, and is a ladder type, ventilation trough type, ventilation channel type, floor sealing type and other similar structures.

In general, in tunnels, factories, offshore structures, etc., cables of large and small diameters for power supply or fluid supply are arranged along the ceiling, floor, or walls, and the cables laid out in this way give aesthetics or inconvenience to passers-by. In order to avoid this, a cable tray is used to support and fix it in an organized state.

In the cable tray as described above, a conduit is attached and arranged to connect to a switchboard, etc. existing nearby.

As such, a method of connecting the conduit to the cable tray may be variously configured.

As a conventional general method, there is a method of attaching and fixing by making a hole in the side of the cable tray and inserting a conduit.

However, this method has problems in that additional equipment is required because a hole has to be drilled in the cable tray, and the cost, time, and effort required for attaching and fixing the conduit and attaching the conduit and strength decrease due to the deformation of the cable tray are increased.

As another conventional method, there is a method of installing a “C”-shaped channel on the side of the cable tray and fixing the conduit using a conduit clamp.

On the other hand, in the case of the conventional tray, when it is necessary to additionally extend the electric wire (L), since it was manufactured without considering the expandability, there is a inconvenience of installing a new tray, thereby increasing the additional cost for installing the tray. there was.

1. Republic of Korea Patent No. 10-1848848

The present invention can prevent the problem of falling off while the installed electric wire is separated during the lifting operation, and in particular, the electric wire for preventing the detachment of the electric wire provided in the building can avoid the inconvenience of additionally installing the tray because it is possible to additionally extend the electric wire. Its purpose is to provide

The present invention for achieving the above object,

A 'C'-shaped side rail with a first coupler formed on the upper surface of the front end and the rear end, respectively, and a second coupler formed on the side to be disposed between the first coupler, and spaced apart from each other in parallel;

It is arranged between the side rails so that both ends face the inner surface of the side rail and is fixed to the side rail through a fastening means to support the electric wire with a connector. A rung that fixes the electric wire through an arc-shaped electric wire fixing part formed at regular intervals along the

A connector that is removably fitted into the mounting groove of the rung, a '∩'-shaped connector fixing part that forms an integral with the connection part and is disposed at the bottom of the rung to removably fix the connector, and is integrally formed on both sides of the connector fixing part. a tray body composed of a sub-fixing mechanism composed of an arc-shaped wire detaining unit capable of fixing an additional electric wire;

An expansion and contraction drive part installed on the ceiling of the building so as to be respectively located on the upper end of the front end and the rear end of the tray body;

An expansion and contraction unit operated by the expansion and contraction driving unit to elevate the tray body;

A connector driving part installed on the lower surface of the expansion and contraction part;

a lifting unit having a coupling protrusion that is detachably fitted to the first coupling hole of the tray body, is installed in the coupling drive part, is rotated by the coupling drive drive part, and is composed of a connector for interconnecting the tray body and the expansion and contraction part;

An inverted ‘Y’-shaped frame installed on the ceiling of a building to be located between the lifting units;

It is disposed opposite to each other based on the frame, is hinged rotatably to the frame, rotates around the rotation point to bite or release the tray body, and a locking protrusion that is detachably fitted to the second coupling hole of the tray body is formed at the distal end finger and

A spring having both ends connected to each of the finger portions to pull the finger portion so as to maintain the closed state of the finger portion;

a fixing unit comprising a solenoid installed on the frame to forcibly rotate the finger by pressing the finger to spread the finger;

a lift input unit for outputting an operation signal so that the expansion and contraction drive unit can be operated;

a rotation input unit for outputting an operation signal so that the connector driving unit can be operated;

a release input unit for outputting an operation signal so that the solenoid can be operated;

A control unit that receives an operation signal from the lifting input unit to control the operation of the telescopic actuator, receives an operation signal from the rotation input unit to control the operation of the connection actuator, and receives an operation signal from the release input unit to control the operation of the solenoid. do it with

The present invention has the advantage that it is possible to prevent the problem of falling while the electric wire erected during the lifting operation is separated, and in particular, it is possible to additionally extend the electric wire, so that the inconvenience of additionally installing the tray can be fundamentally solved.

In addition, it is convenient because the electric wire can be easily and conveniently fixed, and there is an advantage in that the problem that can cause inconvenience to indoor users can be fundamentally solved by hanging the electric wire to be installed from the ceiling.

1A and 1B are perspective views illustrating a wire tray for preventing wire separation provided in a building according to the present invention from different directions;
Figure 2 is a front view of the wire tray for preventing wire separation provided in the building according to the present invention.
3 is a side view of a wire tray for preventing wire separation provided in a building according to the present invention.
Figure 4 is a perspective view of the tray body in the wire tray for preventing wire separation provided in a building according to the present invention.
5 is a perspective view showing the lifting unit separately from the wire tray for preventing wire separation provided in the building according to the present invention.
Figure 6 is a block diagram showing the correlation between each component in the wire tray for preventing wire separation provided in the building according to the present invention.
7A to 7D are views illustrating an operating state of a wire tray for preventing wire separation provided in a building according to the present invention.

Hereinafter, it will be described in detail based on the accompanying drawings.

1A and 1B are perspective views illustrating a wire tray for preventing wire separation provided in a building according to the present invention from different directions, and FIG. 2 is a front view of the wire tray for preventing wire departure provided in a building according to the present invention, 3 is a side view of a wire tray for preventing wire separation provided in a building according to the present invention, FIG. 4 is a perspective view of the tray body in a wire tray for preventing wire separation provided in a building according to the present invention, and FIG. 5 is a building according to the invention It is a perspective view showing the elevating unit separately extracted from the wire tray for preventing wire separation provided in , and FIG. 6 is a block diagram showing the interconnection relationship between each component in the wire tray for wire separation prevention provided in the building according to the present invention.

1A to 6 , the wire tray for preventing wire separation provided in a building according to the present invention is a tray body 100 and a pair of lifting units 200 , a fixed unit 300 , and an elevator input unit 400 . , as composed of a rotation input unit 500, a release input unit 600, and a control unit 700, according to this, it is possible to prevent the problem of falling while the electric wire (L) erected during the lifting and lowering operation is separated, and in particular, of the electric wire (L). It has a technical feature that can fundamentally solve the hassle of additional tray installation as it can be additionally expanded.

1A to 4 , the tray body 100 is composed of a side rail 110 , a rung 120 , and a sub-fixing mechanism 130 , and in this embodiment supports the erected electric wire L It supports and fixes the installed electric wire (L) so as not to be separated in the elevating process, and serves to fix the additionally installed electric wire (L).

The side rail 110 is a metal member having a cross section of a 'C' shape as a whole, and in this embodiment, it is spaced apart from each other in parallel.

The first coupler 111 penetrating up and down is integrally formed on the upper surface of the front end and the rear end of the side rail 110, and the second coupler 112 penetrating in a rectangular shape is integrally formed on the side surface. , the second coupler 112 is disposed between the first coupler 111 .

Here, the coupling protrusion 241 of the coupling member 240 is detachably fitted and coupled to the first coupling hole 111 , and the engaging projection 321 of the finger part 320 is detachably inserted into the second coupling member 112 . tightly fitted and interconnected.

The rung 120 is a member for interconnecting the side rails 110, is disposed between the side rails 110, both ends are abutted against the inner surface of the side rail 110, and passes through the side rails 110. It is fixed to the side rail 110 through a fastening means (eg, a screw bolt) and serves to support and support the electric wire (L) having the connector (C) installed at one end.

In addition, a mounting hole 121 opened downwardly is integrally formed in the inside of the rung 120 , and the connection part 131 of the sub fixing mechanism 130 is detachably fixed to the mounting hole 121 .

And the arc-shaped wire fixing part 122 of the rung 120 is integrally formed, and the wire L is removably inserted and fixed to the wire fixing part 122 .

The sub fixing mechanism 130 is composed of a connection part 131, a connector fixing part 132 and a wire holding part 133 to detachably fix the connector (C), and to fix the additionally extended wire (L). plays a role

The connection part 131 is a block having a predetermined width and thickness, and in this embodiment, it is inserted into the mounting hole 121 of the rung 120 to connect the rung 120 and the connector fixing part 132 to each other. plays a role

The connector fixing part 132 is a member having a '∩' shape that is opened downward when viewed from the front, and is integral with the connector 131 in this embodiment, and the connector C is detachably coupled to the inside. do.

And on the inner surface of the connector fixing part 132, a coupling protrusion 132a that is detachably coupled to the coupling groove C-1 formed on the outer surface of the connector C is integrally formed.

The wire holding part 133 is a 'C'-shaped arc-shaped member integrally formed on both sides of the connector fixing part 132, and serves to hold the additionally extended electric wire L in the present embodiment.

As described above, by fixing the connector (C) via the connector fixing part (132) as a medium, it is possible to minimize the problem that the wire (L) is separated from the tray body (100) together with the connector (C), and the wire is held in place. Since it is possible to fix the electric wire (L) to be additionally extended through the portion 133, there is an advantage that can fundamentally solve the inconvenience of having to additionally extend the tray.

For reference, the connector (C) is a connecting means for electrically interconnecting the wires (L), and forms a cuboid as a whole. A coupling groove (C-1) to which the coupling protrusion (132a) of the connector fixing part 132 is detachably coupled is integrally formed on the outer surface.

Referring to FIGS. 1A to 3 and 5 , the lifting unit 200 is composed of a telescopic actuator 210 , a stretchable part 220 , a connector driving part 230 , and a connector 240 , and in this embodiment, a tray It is installed on the ceiling of the building to be positioned on the upper end of the front end and the rear end of the main body 100 , and is detachably coupled with the tray main body 100 to raise and lower the tray main body 100 .

The expansion and contraction drive unit 210 is a known servomotor, and is controlled by the control unit 700 to increase or decrease the expansion and contraction unit 220 .

The expansion and contraction part 220 is a known multi-stage cylinder that elevates (moves up and down) the tray body 100 while being stretched or contracted by sliding by the expansion and contraction driving part 210 .

The connector driving unit 230 is a normal stepping motor, and is controlled by the controller 700 to rotate the connector 240 by 90 degrees.

The connector 240 is a rectangular plate having a predetermined thickness, fixed to the shaft of the connector driving part 230 and rotated by the connector driving part 230, and the first coupler ( A coupling protrusion 241 that is detachably fitted to the 111 is integrally formed.

The coupler 240 is arranged in a direction perpendicular to the longitudinal direction of the tray body 100, and the first coupler 111 and the coupling protrusion 241 of the tray body 100 are mutually coupled to each other. When done, the tray body 100 and the lifting unit 200 are interconnected via the connector 240 .

For reference, since the expansion and contraction driving unit 210 and the expansion and contraction unit 220 are disclosed in detail in Korean Patent Registration No. 10-1452418, which is already well known in the relevant field, a detailed structure and operation relationship will be omitted.

1A to 3 , the fixing unit 300 is composed of a frame 310, a finger part 320, a spring 330, and a solenoid 340. In this embodiment, a pair of lifting units ( 200) is installed on the ceiling of the building to be disposed between and serves to fix and release the tray body 100 lifted by the lifting unit 200.

The frame 310 is an inverted 'Y'-shaped member, and in this embodiment, is installed and fixed to the ceiling of a building.

In the frame 310, finger portions 320 bent in a 'V' shape are disposed to face each other with respect to the frame 310 and are respectively hinged to the frame 310 via pins.

At the end of the finger part 320, a triangular locking projection 321 is integrally formed, and the locking projection 321 is detachably inserted into the second coupling hole 112 of the tray body 100 to be inserted into the tray body ( 100) to detain.

In addition, a normal spring 330 (coil spring) is disposed between the finger portions 320 , and each end of the spring 330 is fixed to the finger portions 320 , respectively.

The spring 330 fixed in this way serves to pull the finger part 320 so that the finger part 320 always maintains a closed state.

As an example, the tray body 100 is drawn between the fingers 320 of the fixing unit 300 in the process of being lifted by the lifting unit 200. When the tray body 100 is drawn in in this way, the spring 330 The finger part 320, which was closed by the, spreads naturally, and as the locking protrusion 321 of the finger part 320 enters the second coupler 112 of the tray body 100, the tray body 100 is fixed. do.

On the other hand, the tray main body 100 is fixed by the finger portion 320 of the lifting unit 200, unless the finger portion 320 is released from the tray main body 100, the lowering of the tray main body 100 is fundamentally less. There is a serious problem that is difficult with the solenoid (340).

The solenoid 340 is installed on the frame 310, and the solenoid 340 presses one end of the finger part 320 so that the finger part 320 is rotated around the rotation point of the pin and forcibly spread apart. A rod 341 is provided.

For example, when the rod 341 is lowered by the solenoid 340, the finger part 320 is pressed by the rod 341 and spreads, and in this process, the spring 330 is stretched.

Conversely, when the rod 341 is raised by the solenoid 340 , the pressing state of the finger part 320 is naturally released, and the finger part 320 is closed by the restoring force of the spring 330 .

With reference to FIG. 6 , the lift input unit 400 , the rotation input unit 500 , the release input unit 600 , and the control unit 700 will be described.

The lifting input unit 400, the rotation input unit 500, and the release input unit 600 are buttons of a general remote controller. print out

And when the operator presses the rotation input unit 500, an operation signal is output so that the connection driving unit 230 can be operated.

Finally, when the operator presses the release input unit 600, an operation signal is output so that the solenoid 340 can be operated.

For example, the remote controller may be provided with two lifting input unit 400 buttons, one is a button for reducing the expansion and contraction unit 220 of the lifting unit 200, the other is the lifting unit 200 It may be a button for allowing the stretchable part 220 of the to be stretched.

Only one button of the rotation input unit 500 may be formed, and when the operator presses the rotation input unit 500 , the connector driving unit 230 rotates in units of 90°.

Finally, only one button of the release input unit 600 may be formed, and when the operator presses the release input unit 600 , the rod 341 of the solenoid 340 protrudes and presses the finger unit 320 .

The control unit 700 is a general microcomputer, and receives an operation signal from the lifting input unit 400 to control the operation of the expansion and contraction drive unit 210 , and the expansion and contraction drive unit 210 is operated by the control unit 700 to control the expansion and contraction unit By increasing or decreasing the 220, the tray body 100 is lowered or raised.

In addition, the control unit 700 receives an operation signal from the rotation input unit 500 to control the operation of the connection driving unit 230 , and the connection driving unit 230 is operated and controlled by the control unit 700 to rotate in units of 90°. do.

In addition, the control unit 700 receives an operation signal from the release input unit 600 to control the operation of the solenoid 340, and the solenoid 340 is controlled by the control unit 700 to make the rod 341 protrude. do.

7A to 7D are diagrams illustrating an operating state of a wire tray for preventing wire separation provided in a building according to the present invention, which will be described with reference to the following.

First, in a state in which the tray body 100 is placed on the floor, the operator inserts the electric wire L into the electric wire fixing part 122 and fixes it.

And the connector (C) installed at one end of the electric wire (L) is pushed inside the connector fixing part 132 of the sub fixing mechanism 130 constituting the tray body 100 to the coupling protrusion 132a and the coupling groove C -1) as a medium.

When the connector (C) is fixed to the sub fixing mechanism 130 of the tray body 100 as described above, and the electric wire (L) is inserted into the wire fixing part 122 and fixed, the operator presses the elevator input part 400 to raise and lower it. It allows the stretchable portion 220 of the unit 200 to stretch downward.

To explain this in more detail, when the operator presses the lift input unit 400 , an operation control signal is output from the lift input unit 400 to the control unit 700 , and the control unit 700 controls the operation from the lift input unit 400 . The signal is received to control the operation of the expansion and contraction drive unit 210 , and the expansion and contraction unit 220 , which is a multi-stage cylinder, protrudes downward by the expansion and contraction drive unit 210 .

For reference, since the expansion and contraction driving unit 210 and the expansion and contraction unit 220 are already disclosed in detail in Korean Patent Registration No. 10-1452418, which is well known in the relevant field, a detailed description thereof will be omitted.

When the expansion/contraction part 220 protrudes downward as described above, the operator lifts the tray body 100 so that the connector 240 is drawn into the inside of the tray body 100 and arranged, and then the operator operates the rotation input unit 500 ) to rotate the connector 240 by pressing.

To explain this in more detail, when the operator presses the rotation input unit 500 , an operation control signal is output from the rotation input unit 500 to the control unit 700 , and the control unit 700 controls the operation from the rotation input unit 500 . The signal is received to control the operation of the connector driving unit 230 , and the connector 240 is rotated by the connector driving unit 230 to be disposed in a direction perpendicular to the tray body 100 .

When the connector 240 is disposed in a direction orthogonal to the tray body 100 as described above, the operator gradually lowers the tray body 100 that he was holding, and connects the connector to the first coupler 111 of the tray body 100 ( While fitting the coupling protrusions 241 of 240 , the tray body 100 is supported in a suspended state by the connector 240 .

As described above, when the operator presses the lifting input unit 400 while the tray body 100 and the lifting unit 200 are interconnected via the connector 240 as described above, an operation control signal from the lifting input unit 400 is transmitted to the control unit 700 ), and the control unit 700 receives the operation control signal from the lifting input unit 400 to control the operation of the expansion and contraction drive unit 210 , and the expansion and contraction unit 220 which is a multi-stage cylinder by the expansion and contraction drive unit 210 is gradually As it shrinks, the tray body 100 is moved upward.

As described above, in the process in which the tray body 100 is moved upward by the elevating unit 200, it is introduced between the finger parts 320 of the fixing unit 300, and the finger part ( The 320 is gradually opened, and the spring 330 is tensioned by the finger portion 320 that is opened.

And while the tray body 100 is raised to a predetermined height, the locking protrusion 321 of the finger part 320 is inserted into the second coupler 112 to bite and fix the tray body 100 .

When the tray main body 100 is fixed to the fixing unit 300 as described above, the operator stops the operation of the expansion and contraction drive unit 210 to prevent unnecessary power consumption, and thus is fixed even if the operation of the expansion and contraction drive unit 210 is stopped. Since the unit 300 firmly holds the tray body 100, the tray body 100 does not fall and maintains a fixed state.

And when the tray body 100 is fixed as described above, the connector C is separated from the sub-fixing mechanism 130 and then electrically interconnected via the adjacent electric wire L and the connector C, such as A series of processes is illustrated as shown in FIGS. 7A to 7D .

On the other hand, if the tray body 100 needs to be replaced or a new electric wire (L) installation work is required only in some sections, the tray body 100 should be lowered to the floor of the building, and the finger part 320 is the tray body 100 ), it is not easy to separate the tray body 100 from the finger part 320 because it is biting.

In this case, first disconnect the connector (C) and the electric wire (L), and then, as shown in FIG. 7d , the operator presses the release input unit 600 in a state where power is applied to the lifting unit 200 . When the operation control signal is output from the release input unit 600 to the control unit 700, the control unit 700 receives the operation control signal from the release input unit 600 to control the operation of the solenoid 340, and the solenoid 340 ) is controlled by the control unit 700 to protrude the rod 341 .

When the rod 341 is lowered by the solenoid 340, the finger part 320 is pressed by the rod 341 and rotates around the shaft pin and spreads as it spreads. Using the lifting unit 200, the tray body 100 ) is provided, and the operator lowers the tray body 100 using the lifting unit 200 by pressing the lifting input unit 400 .

On the other hand, if you want to additionally extend the electric wire (L), it is enough to insert the additionally extended electric wire (L) into the wire holding part 133 of the sub-fixing mechanism (130).

There is an advantage in that there is no need to additionally extend the tray because the wire (L) to be additionally extended as described above can be fixed to the wire holding part 133 .

Although the present invention has been described in detail only with respect to the specific embodiments described, it is natural for those skilled in the art that various changes and modifications can be made within the technical spirit of the present invention, and it is natural that such variations and modifications belong to the appended claims.

100: tray body 110: side rail 111: first coupling hole
112: second coupling hole 120: rung 121: mounting groove
122: wire fixing part 130: sub fixing mechanism 131: connection part
132: connector fixing part 133: wire holding part 200: elevating unit
210: expansion and contraction driving unit 220: expansion and contraction unit 230: connection unit driving unit
240: connector 241: coupling protrusion 300: fixed unit
310: frame 320: finger portion 321: locking projection
330: spring 340: solenoid 341: rod
400: lift input unit 500: rotation input unit 600: release input unit
700: control unit

Claims (1)

A first coupler 111 formed on the upper surface of the front end and the rear end, respectively, and a second coupler 112 formed on the side to be disposed between the first coupler 111, a 'c' spaced apart from each other in parallel A side rail 110 in the shape of a ruler,
It is disposed between the side rails 110 so that both ends face the inner surface of the side rail 110 and is fixed to the side rail 110 through a fastening means to support the electric wire L having a connector C, and inside A rung 120 for fixing the electric wire (L) through an arc-shaped electric wire fixing part 122 formed at regular intervals along the upper surface longitudinal direction in which a mounting groove 121 opened downward is formed;
A connection part 131 that is detachably fitted into the mounting groove 121 of the rung 120, is integral with the connection part 131 and is disposed under the rung 120 to removably fix the connector C. A sub-fixing mechanism consisting of a 'shaped connector fixing part 132, an arc-shaped wire holding part 133 that is integrally formed on both sides of the connector fixing part 132 to fix the added wire (L). Tray body 100 composed of 130;
An expansion and contraction drive unit 210 installed on the ceiling of a building to be positioned on the upper end of the front end and the rear end of the tray body 100, respectively;
An expansion and contraction unit 220 operated by the expansion and contraction driving unit 210 to elevate the tray body 100;
A connector driving part 230 installed on the lower surface of the expansion and contraction part 220,
Equipped with a coupling protrusion 241 that is detachably fitted to the first coupling hole 111 of the tray body 100, it is installed in the coupling device driving unit 230, and is rotated by the coupling member driving unit 230, and the tray body 100 ) and the elevating unit 200 consisting of a connector 240 interconnecting the expansion and contraction unit 220;
A reverse 'Y'-shaped frame 310 installed on the ceiling of a building to be positioned between the lifting units 200,
The frame 310 is disposed to face each other and is rotatably hinged to the frame 310, rotates about the rotation point to bite or release the tray body 100, and the second coupling of the tray body 100 A finger portion 320 having a locking protrusion 321 that is detachably fitted to the sphere 112 is formed at the distal end thereof;
A spring 330 having both ends connected to the finger portion 320 to pull the finger portion 320 so as to maintain the closed state of the finger portion 320, and;
a fixing unit 300 installed on the frame 310 and configured with a solenoid 340 for forcibly rotating the finger portion 320 by pressing the finger portion 320 so that the finger portion 320 is opened;
an elevating input unit 400 for outputting an operation signal so that the expansion and contraction driving unit 210 can be operated;
a rotation input unit 500 for outputting an operation signal so that the connector driving unit 230 can be operated;
a release input unit 600 for outputting an operation signal so that the solenoid 340 can be operated;
It receives an operation signal from the lifting input unit 400 to control the expansion and contraction drive unit 210 , and receives an operation signal from the rotation input unit 500 to control the connection unit drive unit 230 , and an operation signal from the loosening input unit 600 . A wire tray for preventing wire separation provided in a building, characterized in that it comprises;

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