KR101179210B1 - Insulation unit for distributing led power line at apartment house - Google Patents

Abstract

PURPOSE: An insulation unit for an LED power distribution line for lighting at an apartment house is provided to prevent power outage and safety accidents since coating stripping is prevented by changing a bottom structure of a sweeper. CONSTITUTION: A stepping motor which rotates a cam is included in a separation portion. A sweeper is fixed to a main body to be rotatable using a pivot axis. A ring groove(100) is formed in an inner side of a vertical portion(P). A skirt portion(110) has wrinkles(112) which are extended and whose diameters get larger. A spiral spring groove(120) is formed and is inserted into the elastic spring. A strain gage(140) is connected to a control portion.

Description

LED distribution line insulator for lighting of apartments {INSULATION UNIT FOR DISTRIBUTING LED POWER LINE AT APARTMENT HOUSE}

The present invention relates to an LED distribution line insulator for lighting of a multi-unit house, and more particularly, to prevent the hardening of the distribution line due to moisture by effectively removing only the moisture on the surface while blocking the coating of the distribution line from being peeled off. And it is related to the LED distribution line insulated for lighting of the MDU improved to prevent a power failure and safety accidents due to a short circuit, and to protect the sweeper in the event of a crash of the sweeper.

In areas shared by apartments, efficient LEDs are used for lighting to reduce power consumption.

The LED lamp is operated by receiving power through a distribution line.

In general, in the case of multi-family housing, the amount of electricity used is very large, and a large diameter pipe is installed in a part of the multi-family housing to supply electricity to each household. By such a tube, the distribution line is protected from external contamination and external force.

However, it is common to install various sewage pipes as well as distribution lines inside the pipe.

Therefore, the sewage pipe through which water always flows, the humidity inside the pipe is generally high, and if the dew is formed on the coating of the distribution line due to the high humidity, or fine cracks occur in the sewer pipe, the water is continuously sprayed on the distribution line.

When moisture is formed on the coating of the distribution line as described above, the moisture may evaporate and hardening may occur in the coating of the rubber material by repeating the process of forming the moisture, thereby causing cracks in the coating.

If water penetrates through the gap of the coating due to the curing, there is a danger of a short circuit or a short circuit.

In order to solve this problem, Korean Patent No. 1114565 has been disclosed.

According to the registered patent, it can be seen that the distribution line effectively prevents the curing of the coating by wiping off the moisture on the coating.

However, the disclosed patent wipe wipe for moisture wipe has a structure in which the bottom structure is sloping toward the coating, there is a problem that a part of the coating peels off when the vertical reciprocating movement for sweeping, there is a high risk of short circuit, short circuit .

The present invention was created to provide a more improved and safe LED distribution line insulator for lighting of a multi-unit house by supplementing and improving in view of the above-mentioned problems in the prior art as described above, using the technology configuration disclosed in the registered patent as it is. While improving the bottom structure of the sweeper, the main purpose is to compensate for the disadvantage of peeling the coating.

The present invention is a means for achieving the above object, a screw thread is formed on the outer surface of the rotary shaft placed in parallel with the distribution line; The first connector is installed in the semi-cylindrical shape of the permanent magnet that is formed on the inner surface and both polarities are expressed at both ends and protrudes at one end of the first connector and the first connector is installed on one side of the first connector A first moving part comprising a first assembly formed with a first spaced groove and a screw thread formed on an inner surface thereof and installed to face the first connecting member to surround the rotating shaft and have a polarity on a surface facing the first connecting member. When the electric current is installed to be expressed and is energized, the permanent magnet and the electromagnet generating the repulsive force are protruded and formed at one end of the second cylindrical member facing the first cylindrical member and the semi-cylindrical shape. A moving part having a second moving part including a second assembly having a second separation groove formed on a surface facing the first separation groove; A plate having a main body having a through hole formed through the distribution line and horizontally arranged, and an arm having one end fixed to the main body and the other end fixed to move the first and second assemblies horizontally; An elliptical cam installed in the first and second spaced grooves and fixed to the arm so as to be rotatably spaced horizontally in the first and second coupling bodies, and stepping provided on the upper surface of the arm to rotate the cam. Spacing with motor; When the lower end wraps half of the outer surface of the distribution line and the upper end is rotatably fixed to the main body through the rotation shaft, when the plate falls close to each other to the distribution line by the resistance of air, the plate is raised A pair of sweepers configured to form a cylindrical shape of a light beam narrow when the pair is spaced apart from the power distribution line by air resistance; A motor for rotating the rotating shaft; A battery for operating the motor, the electromagnet and the stepping motor; And supplying power to the electromagnet when the plate is lowered, and supplying power to the stepping motor to release coupling of the moving unit and the rotating shaft to drop the plate, and to power up the stepping motor. And a control unit which cuts the power supplied to the electromagnet and supplies the motor to the moving shaft and the rotating shaft, and supplies power to the motor to rotate the rotating shaft to raise the plate. In addition, the coating is prevented from being peeled off. By inserting a porous sweeper ring to make point contact with the sheath while improving the bottom of the sweeper to a spring buffer structure is configured to protect the sweeper in the event of a collision with the bottom.

According to the present invention, while blocking the peeling of the distribution line at the source effectively removes only the moisture on the surface to prevent the hardening of the distribution line due to moisture to prevent power failure and safety accidents due to short circuits and short circuits between the distribution lines, The effect of protecting the sweeper in the event of a bottom collision.

Figure 1 shows a cross-sectional view of the LED distribution line insulator for lighting of a multi-unit house according to the invention.
2 is a reference diagram showing the operation of the LED distribution line insulator for lighting of a multi-family house according to the present invention.
3 is a reference diagram showing the operation of the LED distribution line insulator for lighting of a multi-unit house according to the present invention.
4 is a reference diagram for illustrating a coupling and operation relationship between a moving unit, a rotating shaft, and an arm according to the present invention.
5 is a reference perspective view for illustrating a coupling relationship between a sweeper and a distribution line according to the present invention.
6 is an exemplary partial cross-sectional view showing the bottom structure of the sweeper according to the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Before describing the present invention, the following specific structural or functional descriptions are merely illustrative for the purpose of describing an embodiment according to the concept of the present invention, and embodiments according to the concept of the present invention may be embodied in various forms, And should not be construed as limited to the embodiments described herein.

In addition, since the embodiments according to the concept of the present invention can make various changes and have various forms, specific embodiments are illustrated in the drawings and described in detail herein. However, it should be understood that the embodiments according to the concept of the present invention are not intended to limit the present invention to specific modes of operation, but include all modifications, equivalents and alternatives falling within the spirit and scope of the present invention.

The present invention uses the previously registered Patent No. 1114565, which will be described later. Therefore, the features of the device configuration described below are all those described in the patent No. 1114565.

However, the present invention further includes a content of improving the lower and lower inner structures of the sweeper so as not to peel off the coating of the distribution line among the components disclosed in the Patent No. 1114565, and this part is the most essential structural features. Achieve.

Therefore, the device configuration, features and operation relationships described below will be referred to the contents of the Patent No. 1114565 as it is, and will be described in detail with respect to the configuration associated with the main features of the present invention at the rear end.

As shown in Figures 1 to 5, the LED distribution line insulator for lighting of a multi-unit house according to an embodiment of the present invention is installed in engagement with the rotary shaft 10, the rotary shaft 10 is installed in parallel with the distribution line (L). The moving part 20 moving up and down according to the rotation of the rotating shaft, the plate 30 penetrates and is fixed to the moving part 20, and is movable up and down, the moving part 20 and the rotating shaft ( Spacer 40 for smoothly releasing the engagement between the 10, and the sweeper 50 is installed rotatably on the plate 30 to remove the moisture on the surface of the distribution line (L) by the movement of the plate (30). Control the lowering and raising of the motor 70 for rotating the rotary shaft 10, the battery 70 and the plate 30 for supplying power to the motor 60, the electromagnet and the stepping motor 42. It includes a control unit 80 for doing.

Rotating shaft 10 has a long cylindrical shape, the thread (10a) is formed on the outer surface and is placed in parallel with the distribution line (L) in the interior of the pipe (1) of the apartment house. The upper end of the rotating shaft 10 is coupled to the rotating shaft of the motor 60 to rotate by the rotation of the motor 60.

The moving part 20 includes a first moving part 20a, which is one of two shapes in which a cylindrical frame protrusion is separated in half so as to be symmetrical with each other, and a second moving part that is one of the other shapes. It includes a portion 20b, the first moving part 20a and the second moving part 20b form a symmetrical shape with each other.

The first moving part 20a has a semi-cylindrical shape with a first connector 21 having a thread 21a corresponding to the thread 10a of the rotational shaft 10 on the inner surface thereof, and one of the first connectors 21. It consists of a first assembly 22 protruding at the end.

The first connecting member 21 is made of a permanent magnet and is manufactured so that both polarities are expressed at both ends of the semi-cylinder, respectively, or the outer surface is formed of a metallic material, and the permanent magnet is formed at both ends of the semi-cylinder as described above. It may also be arranged to produce such expression. That is, a permanent magnet in the form of a horseshoe magnet may be installed inside the semi-cylinder to have an N pole and an S pole at each end. The first connector 21 is installed to surround the rotary shaft 10 and is coupled to the screw thread 10a of the rotary shaft 10 and the screw thread 21a of the first connector 21.

The first assembly 22 is formed to protrude outward from one end of the semi-cylinder, and the first spaced groove 22a having a semi-ellipse shape corresponding to the outer shape of the cam 41 is formed on one surface coplanar with one end. do. In addition, a first guide groove 22b for inserting the guide 32a formed in the arm 32 is formed on the upper and lower surfaces of the first assembly 22.

The second moving part 20b has a semi-cylindrical shape with a second connecting body 23 having a thread 23a corresponding to the thread 10a of the rotating shaft 10 and a second connecting body 23 formed on the inner surface thereof. The first guide groove 22b for inserting the guide 32a formed in the arm 32 is formed on the upper and lower surfaces of the second assembly 24.

The first moving part 20a and the second moving part 20b are installed to surround the rotation shaft 10 in a symmetrical shape with each other, and the second connecting member 23 and the second moving part 20b are configured. The shape of the double assembly 24 is symmetrical with the shape of the first connecting body 21 and the first connecting body 22. The shape of the second moving part 20b is symmetrical with the shape of the first moving part 20a described above, and thus description of the shape is omitted.

The second connector 23 is formed of a metal material on an outer surface thereof, and an electromagnet (not shown) is installed therein. The electromagnet is disposed so that the polarity is expressed at both ends where the polarity of the permanent magnet of the first connector 21 is expressed, and in particular, the electromagnet is disposed so that the permanent magnet and the repulsive force of the first connector 21 are generated. . That is, the permanent magnet and the electromagnet are installed so that the polarity is expressed on both sides of the first connector 21 and the second connector 23 facing each other.

The second assembly 24 also has a second spaced groove having a shape symmetrical with the shape of the first spaced groove 22a on the surface facing the first assembly 22.

Meanwhile, when the first moving part 20a and the second moving part 20b are spaced apart from each other in the horizontal direction by the repulsive force of the permanent magnet and the electromagnet and the rotation of the cam, the coupling pin 25 to limit the separation within a predetermined range. ) Is movably inserted into the coupling groove 25a formed in the first moving part 20a and the second moving part 20b so that the coupling between the first moving part 20a and the second moving part 20b is completed. While not being released, it limits the range of separation.

The plate 30 has a main body 31 horizontally installed with the distribution line L, and one end of which is fixed to the main body 31, and the other end of which fixes the first coupling body 22 and the second coupling body 24 horizontally. An arm 32.

The main body 31 has a rectangular frame shape, and has a through hole 31a through which the distribution line L penetrates. The through hole 31a has a diameter larger than that of the distribution line L, so that the through hole 31a is formed. It is preferable that the air flows through the empty space between the power distribution line (L) and the through hole (31a) is formed to be three times the diameter of the distribution line (L).

Therefore, air may pass through the through hole 31a at the same time as the main body 31 moves up and down.

The arm 32 protrudes from one surface of the main body 31 facing the moving part 20 and is inserted into guide grooves 22b and 24b formed at the first and second coupling bodies 22 and 24 at the ends thereof. Guides 32a are formed to move the first and second assemblies 22 and 24 in the vertical direction and in the horizontal direction. The guide 32a protrudes in a direction facing each other at the distal end of the arm 32 having a 'c' shape.

Spacer 40 is an elliptical stepping motor 42 is fixed to the upper surface of the main body 31, the ellipsoidal installation in the first and second spaced grooves (22a, 24a) fixed to the rotating shaft of the stepping motor 42 Cam 41 on the top.

The cam 41 is installed in the first and second spaced grooves 22a and 24a, but rotates by the rotation of the stepping motor 42 to move the first and second spaced grooves 22a and 24a in the horizontal direction by the same distance. As a result, the first assembly 22 and the second assembly 24 are forcedly spaced apart.

The stepping motor 42 is controlled to be rotated 90 ° at a time by the controller 80 to rotate the cam 41.

The sweeper 50 is for wiping and removing moisture from the surface of the power distribution line L. The cylindrical shape of the upper and lower straits is symmetrically divided in half so that each can be rotated to the main body 31 via the rotation shaft 50a. It is fixed. The lower end of the sweeper 50 is formed in a shape corresponding to the outer shape of the power distribution line L so as to come in contact with the power distribution line L to remove moisture adhering to the surface of the power distribution line L. [ In addition, the end of the sweeper 50 in contact with the surface of the distribution line (L) can be formed of a rubber material in order to more completely remove the moisture on the distribution line (L). In addition, the sweeper 50 is a cylindrical shape of the upper and lower strait as shown in Figure 1, but the inclination leading downward is not constant and forms a slant gently at one point so that when the plate 30 falls downward, the sweeper 50 By the flow of air applied to the more closely contact the power distribution line, when the plate 30 moves upwards, the sweeper 50 and the power distribution line (L) by the air flowing through the through-hole formed in the main body 31 Allows contact with the person to be released.

A hollow rectangular frame-shaped enclosure 3 is installed on the inner upper end of the tube 1 and fixed to the inner surface of the tube 1. Inside the enclosure 3, a motor box 60, a battery 70, a control unit 80 and a distribution box 2 for distributing the distribution line to the lighting LED of the apartment house is fixedly installed.

The motor 60 is connected to the rotary shaft 10 to rotate the rotary shaft 10.

The battery 70 supplies power for operating the motor 60, the electromagnet and the stepping motor 42.

The controller 80 controls the operation of the motor 60, the electromagnet, the stepping motor 42 to control the operation of the LED distribution line insulator for lighting of the apartment house according to the present invention, and more detailed control operation for the lighting according to the present invention The operation of the LED distribution line insulator will be described.

2 to 5 will be described the operation of the LED distribution line insulator for lighting of a multi-unit house according to the present invention. 4 (a) shows a state in which the first coupling body 22, the second coupling body 24, and the arm 32 are coupled to each other, and FIG. 4 (b) shows that the cam 41 rotates to form the first coupling body. (22) and the second assembly 24 is shown to be spaced apart by force. In addition, Figure 5 (a) shows the state in which the sweeper 50 is in close contact with the power distribution line (L), Figure 5 (b) shows the state in which the sweeper 50 is in close contact with the power distribution line (L). .

In general, a multi-family housing by installing a large diameter pipe (1) in a part of the building to the various pipes, wires, etc. through the pipe (1) to protect the pipes and wires from the outside. In the inside of the pipe (1), a distribution line (L), a water pipe and a sewage pipe are generally installed together. Moisture can get on the outer surface of the distribution line (L) installed in the same space in the water flowing pipes, such as water pipes and sewage pipes, the curing of the coating of the rubber material distribution line by the repetition of the phenomenon that the moisture evaporates and the moisture again. This can cause the distribution lines to crack and, in extreme cases, copper wires inside the distribution lines to appear on the surface.

When the LED distribution line insulator for lighting of the apartment house according to the present invention does not operate, the plate 30 is fixed to the upper end of the distribution line (L). That is, in this case, the first connecting body 21 and the second connecting body 23 constituting the moving part 20 are in close contact with each other by magnetic force, and thus, the first connecting body 21 and the second connecting body 21 are coupled to each other. The threads 21a and 23a formed on the inner surface of the connecting body 23 and the threads 10a of the rotary shaft 10 are threaded to each other to fix the plate 30 upward.

When removing the water on the outer surface of the distribution line (L) first supply power to the electromagnet and power to the stepping motor 42 at the same time. When power is supplied to the electromagnet, the electromagnet becomes magnetic and the magnetism is expressed to have repulsion with the permanent magnet of the first connector 21. Therefore, the first connector 21 and the second connector 23 are subjected to the pushing force in the horizontal direction. The stepping motor 42 according to the present invention rotates at an angle of 90 ° every time power is supplied. When power is supplied to the stepping motor 42, the cam 41 connected to the rotating shaft of the stepping motor 42 is rotated 90 °. Rotate to The first spacer 22a and the second spacer 24a are spaced apart from each other by the rotation of the cam 41 so that the first assembly 22 and the second assembly 24 are spaced apart from each other by the same distance in the horizontal direction. do. The electromagnet is supplied with power during the lowering operation, and the stepping motor 42 is supplied with power only while the cam 41 is rotated by 90 °, and then the power is cut off. As a result of the operation of the electromagnet and the stepping motor 42, the thread coupling between the first moving part 20a and the second moving part 20b and the rotational shaft 10 is released, which causes the moving part 20 and The plate 30 fixedly connected to the moving part falls down. Due to the falling of the plate 30, the lower end of the sweeper 50 may be more closely contacted with the distribution line L by the resistance of air, and may wipe off the moisture on the distribution line L better.

When the plate 30 falls, the sweeper 50 may be damaged if the bottom surface of the pipe 1 is touched. Thus, when the plate 30 is dropped, the stopper (not shown) protrudes at the lower end of the rotating shaft to move the moving part 20. The sweeper 50 can be prevented from coming in contact with the bottom of the 20 so as to be in contact with the bottom surface thereof. In addition, the upper surface of the stopper may be provided with a cushioning member (not shown) made of a rubber material capable of absorbing a shock to prevent damage due to the collision between the moving part 20 and the stopper.

When the plate 30 falls, the sweeper 50 may be damaged if the bottom surface of the pipe 1 is touched. Thus, when the plate 30 is dropped, the stopper (not shown) protrudes at the lower end of the rotating shaft to move the moving part 20. The sweeper 50 can be prevented from coming in contact with the bottom of the 20 so as to be in contact with the bottom surface thereof. In addition, the upper surface of the stopper may be provided with a cushioning member (not shown) made of a rubber material capable of absorbing a shock to prevent damage due to the collision between the moving part 20 and the stopper.

After the lowering operation of the plate 30 is completed, power is supplied to the stepping motor 42 to rotate the cam 41 by 90 ° so that the cam 41 is inserted into the first and second spaced grooves 22a and 24a. To be. The first and second coupling bodies 22 and 24 are inserted into the first and second separation grooves 22a and 24a by the cams 41 which are forcibly separated from the first and second coupling bodies 22 and 24. ) Are in close contact with each other. After the stepping motor 42 rotates by 90 °, the power supplied to the electromagnet is cut off, and the first connector 21 and the second connector 23 are coupled by the magnetism of the permanent magnet of the first connector. Be sure to The rotation shaft 10 and the moving part 20 are screwed together by the coupling of the first connecting body 21 and the second connecting body 23, and then supplying power to the motor 60 to rotate the rotating shaft 10. Rotate to raise the moving part 20.

The air moves downward through the through hole 31a of the main body 31 by the upward movement of the moving part 20, and the movement of the air exerts a pressure on the sweeper 50, which causes the sweeper 50 to move outward. It rotates to the side, and the close contact with the distribution line L is released. This is to prevent the water is buried in the lower end of the sweeper 50 by the lowering operation of the plate 30, because when the water rises as it rises again on the surface of the distribution line (L).

When the plate 30 rises to an initial position (ie, the position before the plate descends), the power supply to the motor 60 is cut off to fix the plate 30.

The control of the control unit as described above may be performed manually by installing a control box externally, or may be repeatedly performed at regular intervals.

Embodiments added according to the present invention based on such a configuration, the structure of the sweeper 50 is improved as shown in FIG.

That is, a part of the inner diameter of the sweeper 50 inclined toward the distribution line L forms a vertical portion P in parallel with the distribution line L, and the ring groove 100 having a predetermined size is formed on the inner circumferential surface of the vertical portion P. ) Is formed in the urine.

In other words, the ring groove 100 is formed along the inner diameter of the vertical portion (P).

In addition, a ring-shaped sweeper ring 200 is inserted into the ring groove 100.

In this case, the sweeper ring 200 may be provided in advance in the state of being fitted to the distribution line (L) before the distribution line (L) is wired, so that the sweeper ring 200 may be a complete ring shape, so that the sweeping ring (200) is fitted in the ring groove (100). It is preferable not to be easily separated by.

In addition, the sweeper ring 200 is preferably formed in a size slightly larger than the diameter of the distribution line (L).

In addition, the sweeper ring 200 may be a porous material, such as a sponge.

The diameter of the skirt 110 is increased from the point passing the vertical portion P toward the lower end of the sweeper 50 to form a skirt portion 110, and the skirt portion 110 is formed with a pleat 112. .

Thus, the skirt portion 110 has an elastic buffer function by itself.

In addition, a spiral spring groove 120 is further formed in the inner diameter of the skirt 110, and a truncated elastic spring 130 is fitted into the spring groove 120.

In addition, a portion of the skirt unit 110 includes a strain gauge 140, and a lead wire 142 connected to the strain gauge 140 is drawn out to be connected to the controller 80.

Therefore, when the skirt 110 is deformed during the drop collision, the controller 80 can immediately recognize it.

As such, the improved structure of the sweeper 50 according to another embodiment of the present invention is because the sweeper ring 200 is in contact with the sheath, so that the sheath is wiped off while maintaining a minimum contact state, so that the sheath is peeled off by pressing force. The phenomenon disappears.

In addition, since the sweeper ring 200 has a porosity, it is suitable for washing water because of its excellent water absorption.

Through this, it is possible to fully achieve the object of the present invention.

10; Axis of rotation 20; Moving parts
30; Plate 40; Spacing
50; Sweeper 60; motor
70; Battery 80; The control unit
100; Ring groove 200; Sweeper ring

Claims (1)

Rotating shaft 10 is formed on the outer surface of the screw thread 10a parallel to the distribution line (L); The first connecting member 21 and the first connecting member are formed to surround the rotary shaft 10 in a semi-cylindrical shape of a permanent magnet having a thread 21a formed on an inner surface thereof and both polarities are expressed at both ends thereof. 21, a first moving part 20a formed of a first assembly 22 having a protruding portion at one end and having a first spaced groove 22a formed on one surface thereof, and a screw thread 23a formed on an inner surface thereof. It is installed so as to face the first connector 21 so as to wrap and it is installed so that the polarity is expressed on the surface facing the first connector 21 and the electromagnet is generated when the permanent magnet and the repulsive force are generated. On the surface facing the first spaced groove 22a and protruding from one end of the second connector 23 to face the second cylindrical member 23 and the first coupling member 22 having a semi-cylindrical shape A moving part 20 having a second moving part 20b formed of a second coupling body 24 having a second spaced groove 24a; The through hole 31a is formed so that the distribution line L penetrates and the main body 31 is horizontally arranged, and one end is fixed to the main body 31 and the other end of the first and second coupling bodies 22 and 24. A plate 30 having an arm 32 to fix the horizontally; An elliptical cam 41 which is installed in the first and second spaced grooves 22a and 24b and is rotatably fixed to the arm 32 so as to be forced to horizontally space the first and second coupling bodies 22 and 24. A spaced portion 40 having a stepping motor 42 installed on an upper surface of the arm 32 to rotate the cam 41; A lower end surrounds half of the outer surface of the distribution line L, and an upper end is rotatably fixed to the main body 31 via the rotation shaft 50a. When the plate 30 falls, the air is prevented by the resistance of the air. When the plate 30 is in close contact with each other, and the plate 30 rises, a pair is formed to form a cylindrical shape of the upper and lower straits when mutually bonding the distribution line L so as to be spaced apart from the distribution line L by the resistance of air. Sweeper 50; A motor 60 for rotating the rotary shaft 10; A battery (70) for operating the motor (60), the electromagnet and the stepping motor (42); When the plate 30 is lowered, the power is supplied to the electromagnet and the power is supplied to the stepping motor 42 to release the coupling of the moving unit 20 and the rotating shaft 10 to the plate 30. When falling down, the plate 30 is raised to supply power to the stepping motor 42 and then cut off the power supplied to the electromagnet to couple the moving unit 20 and the rotating shaft 10 and the motor Control unit 80 for supplying power to the 60 to rotate the rotary shaft 10 to raise the plate 30;
Some of the inner diameter of the sweeper 50 inclined toward the distribution line L further includes a vertical portion P extending in parallel with the distribution line L.
Ring groove 100 is formed on the inner surface of the vertical portion (P),
The outer circumferential surface of the porous sweeper ring 200 is fitted into the ring groove 100, and the inner circumferential surface of the sweeper ring 200 is in point contact with the distribution line L.
From the vertical portion (P) to extend downward in diameter to form a skirt portion 110 having a pleat 112,
The spiral spring groove 120 is formed on the inner circumferential surface of the skirt unit 110 to fit the elastic spring 130,
LED grid insulated for lighting of the apartment house, characterized in that the outer side of the skirt 110 is further provided with a strain gauge (140) connected to the control unit (80).

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