KR100641814B1 - Connection Structure of Wiring Duct - Google Patents

Abstract

The present invention relates to a connector for connection of a straight or curved portion of a wiring duct used in the expansion of wiring and wiring devices such as electric wires, printer cables, data cables, telephone lines or speaker wires of computers.

The connector according to the present invention is a connector for interconnecting the wiring duct consisting of the wiring duct main body and the cover coupled through the main body and the slide groove and the projection can be configured both inside and outside the wiring duct.

The connector has a structure covering a predetermined area of the wiring duct, so that the wiring duct and the connector can be easily removed without maintaining a strong bonding force by contacting a large area.

It is easy to disassemble and connect the connector and the wiring duct by adopting the slide type formed by the sliding groove and the projection as the coupling form of the connector and the wiring duct.

Wiring duct, connector, coupling, insert, bolt

Description

Connection Structure of Wiring Duct}

1 is a perspective view of the connector for wiring duct according to the prior art.

Figure 2 is an exploded perspective view showing a first embodiment of the connector for external wiring duct of the cover form of the present invention.

Figure 3 is a perspective view showing a first embodiment of the connector for the external type wiring duct of the cover type of the present invention.

4 is a cross-sectional view of the first embodiment of the coupling of the connector for the external type wiring duct of the present invention.

5 is an exploded perspective view of a connector for a wiring duct consisting of a cover type external connection duct and a connecting rod in a second embodiment according to the present invention;

6 is a cross-sectional view of a connector for a wiring duct composed of a cover type external connection duct and a connecting rod in a second embodiment according to the present invention;

7 is a cross-sectional view of a connector for a wiring duct having a connecting duct therein according to a third embodiment according to the present invention;

8 is a cross-sectional view of an embodiment in which the shape of the connection duct is modified in the fourth embodiment according to the present invention.

Figure 9 is a perspective view of the coupling of the connector for wiring duct consisting of a connecting rod and the connecting rod in the fifth embodiment according to the present invention.

10 is a plan view of a connector for a wiring duct consisting of an internal connection duct and a connecting rod in a fifth embodiment according to the present invention;

Figure 11 is a view showing a cross section of the internal connector consisting of bolts and nuts as a fixing means in a fifth embodiment according to the present invention.

12 is a view showing a cross-section of the inner connector coupled to the nut by tightening with a bolt in a fifth embodiment according to the present invention.

13 is an exploded perspective view of a connector having a structure different from that of the fifth embodiment as a sixth embodiment according to the present invention;

14 is a view showing a cross section of the internal connector different in structure from the fifth embodiment as a sixth embodiment according to the present invention;
15 is a cross-sectional view of the internal connection member coupled to the wiring duct.

<Description of Symbols for Major Parts of Drawings>

100: connector 110, 110a: connection duct 120: sliding fastening unit 130: lower projection 140: bolt 200, 200a: wiring duct main body 210: wiring duct body lower plate 220: sliding groove 230: lower projection groove 240: circular coupling rod 250 : Fastening part catching jaw 260: Lower plate catching jaw 270: Fastening protrusions 280, 290: Fastening hole 295: Fastening process center line 300: Connecting rod 310: Through hole 400: Inner connector 410: Connecting duct supporting jaw 420: Fixing protrusion 430 : Fixing groove 440: Protruding jaw 450: Washer 460: Nut

The present invention relates to a connection for connecting the straight or curved portion of the wiring duct used in the expansion of the wiring and wiring devices, such as wires, computer printer cables, data cables, telephone lines or speaker wires for wiring ducts according to the present invention The connector relates to a connector for interconnecting a wiring duct made up of a wiring duct body and a cover which is coupled to the body via a groove and a protrusion.

In general, when wiring electric wires or data cables of computers that supply power to office equipment such as telephones, copiers, or printers in the interior of buildings, the wires are used to protect them from the outside and to make them look good. I use a lot of ducts.

Such wiring ducts are usually fixed to the floor or wall through a double-sided tape provided on the bottom of the body and to store the wires therein to protect the wires.

The present invention relates to a connector for interconnecting the wiring duct as described above, the conventional wiring duct is connected to the wiring ducts in such a way to form a connection groove in the inside, the outside to insert the connecting rod and to be fixed by the coupling means. I'm using the method.

Looking at the detailed configuration and operation of the wiring duct technology formed in the Republic of Korea Patent No. 10-0354485 shown in Figure 1 external connection groove as shown in the prior art as follows.

Two sidewalls formed in the longitudinal direction to install a plurality of wiring mechanisms, a bottom surface connecting the sidewalls, and formed on the outside of the sidewall, respectively, are connected to the main body by inserting and fixing the connecting rod 300 from the outside with screws. The wiring duct main body 200 and the cover 520 formed on the open end of the side wall are provided with an external connection groove 500 and a cover fixing groove 510 for fixing a cover of a predetermined shape. The cover fixing means is configured to be fixed to the cover fixing groove 510 at the open end side of the main body 200.

In the connection method of the wiring duct, the connecting rod 300 is inserted into the external connection groove 500, and the wiring duct is interconnected by using a screw.

At this time, the wiring duct is fixed to the ceiling using a hanger bracket which is screwed to the external connection groove 500 of the wiring duct main body 200 or to the ceiling or wall surface using a surface mounting bracket.

As the connection member between the wiring ducts, fixing means such as a connecting rod 300 and a bolt 140 are used.

The connecting member such as the connecting rod 300 does not support heavy weight, but has been generally used as a connector for wiring ducts.

The reason for this is that the ballast duct itself is fixed and supported by the fixing plate or the bolt 140 in the wiring duct, so that the load duct itself does not generate much load due to the mechanism in which the wiring duct is formed inside. This is because they do not require strong bonding force even when they are interconnected.

However, in places where the illuminance of the room should be maintained high, such as large stores, wiring ducts and fluorescent lamps should be installed and fixed on high ceilings. If the connector for the wiring duct connected between the ducts does not withstand the load, there may be a problem that a large accident such as human injury may occur due to the fall of the lighting fixture.

The present invention has been proposed to solve the problems of the prior art to provide a connection member that can have a strong coupling force by using a connector consisting of a wiring duct body, a cover coupled through the body and the slide groove and the projection. .

The present invention provides a wiring duct for wiring and ducts for wires, computer cables, telephone lines, and the like, for attaching and fixing wiring devices. do.

Referring to the embodiment shown in the accompanying drawings, Figures 2 to 4 characterized by such a configuration as follows.

Figure 2 is an exploded perspective view showing a first embodiment of a wiring duct connector for coupling the wiring duct and the wiring duct to each other in the form of a cover from the outside, Figure 3 is a wiring duct and the connector for wiring duct is coupled 4 is a perspective view illustrating a first embodiment, and FIG. 4 is a cross-sectional view of the first embodiment in which a wiring duct and a connector for a wiring duct are coupled.

The wiring duct connector 100 of the present invention is integrally formed with the connection duct 110 and the connection duct 110 that surrounds a predetermined outer surface of the wiring duct in order to interconnect the wiring duct main body 200. Sliding fastening portion 120, the sliding fastening portion 120 formed to protrude inwards, and fastening holes 280 and 290 for inserting the fixing means through the sliding fastening portion 120 and the connection duct 110 integrally. And are formed in the connection duct 110, respectively, and include a lower protrusion 130 to further strengthen the coupling of the wiring duct body and the connection duct 110.

    Looking at the characteristics of the connector for the wiring duct having such a configuration as follows.

The connector 100 is open at both ends and the lower side in the longitudinal direction, the upper side and both sides are closed, the inner fastening sliding coupling of the vertical protrusion that can be coupled to the wiring duct main body 200 in a sliding manner. The unit 120 and the lower protrusion 130 are formed on the upper and lower, respectively, and the fastening hole 280 is formed on the outer surface of both sides of the wiring duct main body 200 so that the fixing means can be coupled at a predetermined interval. Have

The structure of the wiring duct coupled by the connector 100 is the lower side of the wiring duct main body 200, both sides and the upper portion is closed, both ends of the wiring duct in the longitudinal direction is open, the upper side of both sides, The lower sliding groove 220 and the lower protrusion 130 grooves in the longitudinal direction are formed, respectively.

In the sliding groove 220, the sliding fastening part 120 formed integrally with the connection duct 110, and the lower protrusion 130 formed in the connection duct 110 is inserted into the lower protrusion groove 230 in a sliding manner. It is configured to be.

The coupling duct 110 and the sliding fastening part 120 formed integrally with the connection duct 110 are fastening holes 280 and 290 for inserting fixing means to the connection duct 110 and the sliding fastening part 120, respectively. Is formed.

Accordingly, the connection duct 110 and the sliding fastening part 120 are formed such that the fastening holes 280 and 290 pass through the same position.

The open side of the sliding groove 220 is formed with a protruding fastening portion engaging jaw 250, the inner lower end of the wiring duct main body 200 to be coupled to the wiring duct main body lower plate 210 in a sliding manner. The lower plate engaging jaw 260 of the wiring duct main body 200 protruding outward, the wiring duct main body lower plate 210 serving as a cover of the opened lower portion of the wiring duct main body 200, and the lower portion of the wiring duct main body. It has a configuration including a circular coupling rod 240 to be fixed to the side plate 210 in the wiring duct body 200.

If the lower end portion inside the wiring duct main body 200 is bent outwardly, the wiring duct main body lower plate 210 is pressed into the sliding duct by sliding the wiring duct main body lower plate 210 and is inserted into the wiring duct main body 200. A predetermined space is formed between the lower end of the outer surface of the outer surface and the wiring duct body lower plate 210, and the circular coupling rod 240 is inserted into the space.

The circular coupling rod 240 is a member made to have elasticity by rolling a cylindrical member such as a plate made of a resilient material such as steel, alloy or synthetic resin material.

The fixing means is a supporting member for fixing the wiring duct and the connector 100, and when inserted into the fastening holes 280 and 290 through which the connecting duct 110 and the sliding fastening part 120 are integrally inserted, the lower end of the fixing means is wired. The duct main body 200 is pressed while being dug and fixed.

As the fixing means in the present invention, the bolt 140 is described as an embodiment, but various means may be used as long as the fixing means has a head, and the nut 460 may be coupled to the bolt 140.

Three product recognition grooves are formed in the outer surface and the bottom surface of both sides of the wiring duct main body 200 along the longitudinal direction, and these grooves are for easily identifying that the applicants own products when the product is manufactured and sold. will be.

However, these grooves are not intended to limit the technical scope of the present invention but are merely for the purpose of recognizing their products.

The lower protrusion 130 serves to increase the coupling strength of the wiring duct connector 100 and the wiring duct main body 200. In the present invention, the lower protrusion 130 may be configured regardless of the position of the wiring duct main body 200. Can be.

The fastening part locking jaw 250 of the wiring duct body 200 has a function of fixing the sliding fastening part 120 of the wiring duct connector 100 so as not to be detached from the sliding groove 220 of the wiring duct body 200. Do it.

Between the fastening hole 280 and the fastening hole 280 formed at predetermined intervals on the outer surface of the wiring duct main body 200, the fastening processing center line 295 is drawn in a straight line in a groove shape.

The fastening hole processing center line 295 is to enable a predetermined interval and accurate positioning between the fastening holes 280 when forming a screw hole using a tab in the fastening hole 280.

The method of assembling the wiring duct connector 100 having the above configuration to the wiring duct body 200 is as follows.

A fastening hole 280 having a screw protrusion into which the bolt 140 can be inserted is formed using a tab at a predetermined interval on the outer surface of the connector 100 for wiring duct.

Before the connector 100 and the wiring duct main body 200 are coupled to each other, a portion of the bolt 140 is inserted into the fastening hole 280 formed on the outer surface of the connector 100.

One open side of the connector 100 is inserted into the wiring duct main body 200 by being pushed in a sliding manner to be coupled.

At this time, the coupling portion is formed in the upper and lower sliding fastening portion 120 and the lower protrusion 130 formed on both sides of the inner side of the connector 100 and the upper and lower sides of the wiring duct main body 200 in a shape corresponding thereto. Sliding groove 220 and the lower projection groove 230 is formed so that it can be combined to correspond to each other.

Therefore, when the wiring duct connector 100 slides into the wiring duct body 200, the wiring duct connector 100 is coupled to the wiring duct body 200 in a cover shape.

The connector 100 and the wiring duct main body 200 are connected to the wiring duct main body 200 to be connected to an open one side of the opposite side of the connector 100 coupled to the wiring duct main body 200 in the same manner as described above. Combine.

The bolt 140 coupled to the fastening hole 280 formed on the outer surface of the wiring duct body 200 integrally penetrates through the fastening holes 280 and 290 formed in the connection duct 110 and the sliding fastening part 120. The bolt 140 is tightened to contact the sliding groove 220 of the duct body 200 to one side closed.

The lower end of the coupled bolt 140 passes through the fastening holes 280 and 290 formed in the connection duct 110 and the sliding fastening part 120 to close the sliding groove 220 formed of the wiring duct body 200. The wiring duct main body 200 and the connector 100 are fixedly coupled while being pressed by the side.

An internal auxiliary plate (not shown) may be inserted into the wiring duct main body 200 to be coupled with a bolt, and the fluorescent ballast may be fixed to the internal auxiliary plate.

 In addition, the electrical wiring combined with the connector is inserted at both ends for free and easy connection to the inner portion of the wiring duct main body 200.

A through hole (not shown) is formed through the lower portion of the wiring duct body lower plate 210, and a lamp holder (not shown) is installed through the through hole to install a fluorescent lamp in the fixed lamp holder.

In addition, the lamp holder and the fluorescent lamp (not shown) may be installed in the wiring duct inner accommodating part by making the wiring duct large.

The lower end portion inside the wiring duct main body 200 is slid outwardly so that the locking projection 270 of the wiring duct main body lower plate 210 is pushed into the lower plate engaging jaw 260. Push-in coupling, insert and fix the wiring duct main body lower plate 210 and the circular coupling rod 240 in the receiving space formed between the lower end of the outer surface of the wiring duct main body 200, the wiring duct assembly is completed. .

A coupling piece such as a circular coupling rod 240 inserted into the accommodation space may be configured in various forms according to the size of the accommodation space.

5 is an exploded perspective view showing a second embodiment of the wiring duct connector is composed of a connecting rod in which a through hole is formed at a predetermined interval with the connecting duct, Figure 6 is a connecting rod and the connecting duct by the fixing means It is sectional drawing which showed the state joined to the duct main body.

The connecting rod 300 has a through-hole 310 is formed at a predetermined interval and is configured to be inserted into the sliding groove 220 of the wiring duct main body 200 in a sliding manner.

The through hole 310 is a screw hole is formed in the size that can be inserted into the bolt 140, the gap between the through hole 310 is a fastening hole 280 formed on the outer surface of the wiring duct connector 100 When the connecting rod 300 is inserted into the sliding groove 220 of the wiring duct main body 200, the through hole 310 and the fastening hole 280 are configured to be positioned at the same point.

Because the bolt 140 is inserted through the fastening hole 290 formed on the outer surface of the connection duct 110, the through hole of the connecting rod 300 inserted into the sliding groove 220 of the wiring duct main body 200 ( This is because the interval and position between the through holes 310 must be equal to the interval and position of the fastening hole 280 formed on the outer surface of the wiring duct body 200 to penetrate 310.

The connecting rod 300 having the through hole 310 formed therein and the wiring duct connector 100 including the connecting duct 110 are installed in the wiring duct as follows.

The connection protrusion 110 and the lower protrusion 130 formed at the lower end of the connection duct 110 are inserted into the lower protrusion groove 230 formed on the outer surface of the wiring duct main body 200 to be inserted and coupled in a sliding manner.

The connection duct 110 is configured on the outer surface of the wiring duct main body 200 in the form of a cover.

Inserting the connecting rod 300 having the through-hole 310 is inserted into the sliding groove 220 of the wiring duct main body 200, the fastening hole 290 of the connecting duct 110 and the through-hole of the connecting rod 300 Align the position of 310 equally.

The fastening hole 280 and the through hole 310 are tightened by using the bolt 140, and the lower end of the bolt 140 to be inserted is closed of the sliding groove 220 of the wiring duct body 200. While pressing and digging one side, the wiring duct main body 200 and the connector 100 are fixedly coupled.

The method of coupling the wiring duct main body lower plate 210 to the lower portion of the wiring duct main body 200 is the same as described in the first embodiment.

7 is a cross-sectional view of an embodiment using an internal connection member instead of using an external connection member as a third embodiment according to the present invention.

The connector 100 for the wiring duct inserts a connection member therein instead of the connector 100 formed in an outer cover shape, inserts the connecting rod 300 into the external connection groove, and then connects the connecting rod 300 with the connecting rod 300. Wiring duct and connector in such a way that the connecting member, the wiring duct main body 200 integrally penetrates the through hole 310 and the fastening holes 280 and 290, respectively, and tightens and fixes the grooves formed through the bolts 140 through the integrally formed grooves. The coupling configuration of 100 is shown.

8 is a cross-sectional view of an embodiment in which the shape of the connection duct is modified in the fourth embodiment according to the present invention.

As shown in FIG. 8, the shape of the connection duct 110a is the same as the shape of a predetermined outer surface of the wiring duct main body 200, thereby forming the connection duct 110a in the sliding groove 220 of the wiring duct main body 200. ) Is inserted into the lower protrusion groove 230 and coupled in a sliding manner.

The deformed connection duct 110a and the wiring duct main body 200 which are located at one side closed to the sliding groove 220 are integrally penetrated, and the bolt 140 is inserted and coupled.

Combination configuration of the above embodiments is in the form of one of a variety of embodiments in practice, in addition to it may be configured in various forms.

9 is an exploded perspective view showing an internal connection member in a fifth embodiment according to the present invention, FIG. 10 is a perspective view showing an internal connection member coupled to a wiring duct, and FIG. 11 is an internal connection member connected to a wiring. 12 is a view showing a plan view combined with the duct, Figure 12 is a view showing a cross-sectional view of the internal connection member coupled to the wiring duct, Figure 13 is a nut formed in the fixing groove of the connector as the bolt is tightened to rise along the screw projection It is a figure which shows the cross section which a bolt and a nut engage.

In the wiring duct main body 220a shown in FIGS. 9 to 15, the upper and both ends thereof are opened, and the lower and both sides thereof are closed to form an accommodation space therein.

The internal connector 400 connecting the wiring ducts contacts the internal both sides of the wiring duct main body 200a from the lower surface of the connection duct support jaw 410 formed by protruding from each of the inner side surfaces of the wiring duct main body 200a. The lower ends of both sides are vertically bent to form a step as high as the height of the protrusion protruding from the bottom of the wiring duct main body 200a, and are parallel to the bottom of the wiring duct main body 200a. Is bent in the groove shape along the groove-shaped space formed by the projection in the inner central portion of the wiring duct main body 200a.

In the central portion of the inner connector 400 of the groove shape formed by the protrusion is formed a fixing groove 430 into which the bolt 140 can be inserted, the through hole is formed in each of the upper and lower sides of the fixing groove 430, respectively. do.

When the bolt 140 is inserted into the through hole formed at the upper side of the fixing groove 430, the bolt head part is seated, and a protruding jaw 440 configured to be fixed and coupled is formed.

  The inner connector 400 is formed by the fixing protrusion 420 which can prevent the shaking due to the external impact is extended to the lower portion of the lower inner portion of the inner connector 400.

When the bolt 140 is inserted into the fixing groove 430 and tightened, the nut 460 formed in the fixing groove 430 rises to the top along the screw protrusion of the bolt 140 by the law of action reaction. It is blocked by the jaw 440 is fixed.

As shown in FIG. 11, when the bolt 140 is tightened, the nut 460 rises in the direction opposite to the direction in which the nut 140 is tightened because the width of the fixing groove 430 is smaller than the radius at which the nut 460 rotates. 460 is going to follow the screw projections under the action, reaction force without idling.

The washer 450 may be inserted between the bolt 140 and the protrusion 440 to increase the coupling force between the bolt 140 and the internal connector 400.

Referring to the assembling method of the fifth embodiment shown in Figures 9 to 13 as follows.

The nut 460 of the fixing groove 430 of the inner connector 400 is inserted, and the nut 460 is placed at the same position as the through hole formed in the bottom surface of the fixing groove 430.

Position the washer 450 on the outer surface of the protruding jaw 440 of the fixing groove 430, and then insert the bolt 140 to allow the bolt 140 to pass through the washer 450 and the nut 460 to fix the groove. Tighten so that the bolt 140 is inserted to the through-hole formed in the bottom portion of the 430.

The wiring duct main body 200a to be connected to each of both ends of the internal connector 400 is inserted and coupled in a sliding manner.

When the bolt 140 is tightened, the nut 460 rises to the top along the screw projection and is blocked by the protruding jaw 440, so that the bolt 140 and the nut 460 are coupled to each other. The inner end 400 penetrates the bottom surface of the fixing groove 430 and presses the bottom surface of the wiring duct main body 200a to dig into the inner connector 400 and the wiring duct main body 200a.

If the screw projection is formed by using a tab in the through hole formed in the upper and lower fixing grooves 430 of the inner connector 400, the fixing groove 430 may be configured without using the nut 460.

In addition, the through hole of the inner connector 400 is formed so that the bolt 140 is inserted into the groove formed in the bottom surface of the wiring duct main body 200a. When the bolt 140 is inserted into the hole, the width of the groove is formed by the bolt 140. Because the size is similar to the lower end portion of the bolt 140, the screw protrusion of the bolt 140 is in close contact with the groove is stronger because the coupling force can be configured only the bolt 140 without the nut 460 to configure the inner connector (400).

     Connection duct support jaw 410 that can fix and support the internal connector 400 is formed on both side surfaces of the wiring duct main body 200a, and when the bolt is tightened by the connection duct support jaw 410 to the outside. The inner connector 400 to be separated can be fixed and made to strengthen the coupling force of the wiring duct body 200a and the inner connector 400.

FIG. 14 is an exploded perspective view illustrating a coupling between an internal connection member and a wiring duct according to a sixth embodiment of the present invention. FIG. 15 is a cross-sectional view illustrating an internal connection member combined with a wiring duct.

The upper surface of the inner connector 400 is open, and both side surfaces of the inner connector 400 which is fixed and supported by the connecting duct supporting jaw 410 formed of the wiring duct main body 200a, and the bottom portion connecting the two side surfaces. And, through the hole in which the bolt 140 can be inserted in the center of the bottom portion is formed.

At the position where the through hole is formed, a fixing groove 430, which is an accommodation space into which the bolt 140 and the nut 460 can be fitted, is formed at a lower end thereof, and a through hole is passed through the bottom of the fixing groove 430. The lower end of the bolt 140 is inserted to couple the inner connector 400 and the wiring duct main body 200a while pressing and digging the bottom surface of the wiring duct main body 200a.

 Although described with reference to the embodiments of the accompanying drawings of the present invention, the present invention is not limited thereto, and many structural changes and modifications can be made without departing from the scope of the claims.

As described above, since the wiring duct connector of the present invention surrounds a predetermined area inside and outside the wiring duct, the coupling duct can be firmly fixed without fluidity in a more stable form than the prior art, and thus the wiring duct can be maintained at a high altitude. It is also effective in preventing safety accidents such as falls during installation.

Even when the structures of the interconnection ducts between the wiring ducts are formed to have an unsightly appearance, the connector serves as a cover, and thus aesthetics can be saved.

Claims (9)

delete In the wiring duct connecting structure comprising a wiring duct body having a predetermined unit length, and a connector for extending the length by coupling two wiring duct bodies connected to each other, The connector is formed with a sliding fastening portion to be inserted into the sliding groove of the wiring duct body, and further includes a lower protrusion protruding inwardly of the wiring duct body in the lower end portion,       The wiring duct body has a lower end and both ends open, the upper and both sides are closed to form a space therein, a sliding groove is formed in the longitudinal direction on both sides of the outer surface, the fastening protruding on one open side of the sliding groove The hooking jaw is configured, the connection structure of the wiring duct, characterized in that it comprises a lower projection groove coupled to the lower projection of the connector below the outer surface. 3. The connection structure of claim 2, wherein the sliding fastening portion is formed integrally with the connection duct. delete The wiring duct connection structure according to claim 2 or 3, wherein the sliding fastening portion is formed as a separate connecting rod which is separated from the connecting duct and has a plurality of through holes formed at predetermined intervals. In the wiring duct connecting structure comprising a wiring duct body having a predetermined unit length and an internal connector for coupling the two wiring duct bodies connected to each other and extending the length, the wiring duct body has an open top and both end surfaces thereof. The lower part and both sides are closed to form a space therein, and both side surfaces inside the wiring duct main body include a connection duct supporting jaw extending inwardly and extending. The internal connector is a connection structure of the wiring duct, characterized in that the sliding duct is inserted into the lower end of the connecting duct support jaw formed inside the wiring duct body.  The method of claim 6, wherein the inner connector is the upper and both end surfaces are open, the lower and both sides are closed to form a space therein, the lower surface is formed with a through hole through which the bolt can be inserted Connection structure of wiring duct. 8. The connection structure of claim 7, wherein a nut is further included in the space into which the bolt is inserted to strengthen the coupling force. The connection structure of claim 6, further comprising a fixing protrusion extending vertically and protruding downward from the bottom of the inner connector.

Images