KR102149477B1 - Branch busbar assembly for distribution board - Google Patents

Abstract

In the present invention, in order to easily and stably connect the branch bus bar to the bus bus bar, a plurality of slots into which bus bus bars supplying power to each phase are inserted at regular intervals up and down on one side are formed, and through holes and cooling are provided on the opposite side. For this purpose, an air vent for discharging the inside air or introducing outside air is formed, and an insulation case with bolt inserts vertically formed therein, is mounted inside the insulation case, and one end thereof is exposed to the upper surface of one of the slots. A branch bus bar in contact with the upper surface of the bus bar, the opposite end is exposed through the through hole, and a first clearance hole is drilled in the middle, is mounted inside the insulating case, and one end is one of the slots. A clamping jaw exposed on one lower surface facing the branch busbar and elastically deformed by elastic deformation with the lower surface of the bus bus bar, and a screw hole formed at the opposite end thereof, and a screw hole of the clamping jaw through the bolt insertion portion Disclosed is a branch assembly for a distribution board including a tightening bolt that is inserted into the insulating case in a state of being screwed with and tightens the clamping jaw to pressurize and adhere to the lower surface of the bus bar.

Description

Branch assembly for distribution board {BRANCH BUSBAR ASSEMBLY FOR DISTRIBUTION BOARD}

The present invention relates to a branch assembly for a distribution board, and more particularly, it is possible to easily and stably connect the branch bus bar to the bus bar, and in the process of assembling the bus bar and the branch bus bar, the fixed state of the bus bus bar and the branch bus bar can be immediately checked with the naked eye. It relates to a branch assembly for a possible distribution board.

Distribution board is a device that receives power from the switchboard and distributes it to various devices in buildings or factories, and detects electrical hazards in advance to cut off electricity. A circuit breaker that cuts off the circuit in case of an abnormality due to such as, a plurality of main busbars connected to the load terminal of this main breaker, and a branch circuit that distributes power from the bus bar to the load side. It consists of a structure in which a number of branch breakers to protect the system and a branch bus bar that is connected between the bus bus bar and the terminal portion of the branch breaker to branch the current path are built-in.

In the case of electrically connecting the bus bus bar and the branch bus bar with bolts in such a distribution board, tap processing for bolting is required and assembly work is inevitably cumbersome and inconvenient.

In addition, since the bus bus bar and branch bus bar are excessively exposed to maintain the distance between the phases, if the arrangement of the branch breaker is changed or replaced during maintenance, etc., electrical safety accidents such as electric shock or short circuit if the power supply to the main breaker is not cut off. There is a problem that the danger of

In order to solve this problem, a structure has recently been proposed in which the branch bus bar is modularized in the form of a kit so that it can be quickly and simply fastened between the bus bar and the terminal portion of the branch circuit breaker and secured safety.

For example, in Patent Document 1, a branch bus bar and a pressure connection terminal are built in the space where the bus bus bar is inserted, and the pressure connection terminal is tightened with bolts while the bus bus bar is inserted therebetween to maintain the mutual connection. The structure is disclosed.

However, if the bolt for coupling the pressurization connection terminal to the branch bus bar is not fully tightened, the contact resistance between the branch bus bar with a large resistance temperature coefficient and the connection terminal increases due to fastening and contact failure. In addition to causing deterioration, there is a problem in that an accident occurs in which operation of the device is impaired or the device in operation is stopped due to poor conduction.

In addition, when the bus bus bar is inserted between the branch bus bar and the pressure connecting terminal, the pressure connecting terminal freely moves, causing contact interference, interfering with the insertion operation, and thus, there is a problem that the bus bus bar cannot be inserted smoothly.

The above-described background technology is information possessed by the present inventors or acquired in the process of deriving the present invention, and is only intended to help understand the technical significance of the present invention, and is widely used in the technical field to which the present invention belongs before filing the present invention. It should be noted that this does not mean a known technology.

KR 10-1364164 B1(2014.02.11) KR 10-1886116 B1(2018.08.01) KR 10-2046904 B1(2019.11.14) KR 10-2017-0029136 A(2017.03.15) KR 10-0973944 B1(2010.07.29) KR 10-0909458 B1(2009.07.20) KR 10-0817887 B1(2008.03.24) KR 10-0566662 B1(2006.03.25)

Accordingly, the inventors of the present invention can easily and stably connect the branch booth bar to the bus bus bar in order to comprehensively consider the above-described matters and solve the technical limitations and problems of the existing technology. As a result of continuous research, we made every effort to develop a branch assembly for distribution boards with a new structure that promotes the effect of quick and easy assembly work as the fixed status of busbar and branch busbars can be checked with the naked eye. The invention was created.

Accordingly, it is a technical problem and object to be solved by the present invention to provide a branch assembly for a distribution board that allows a direct confirmation of a state in which the branch bus bar is completely and firmly fixed to the bus bus bar.

In addition, another technical problem and object to be solved by the present invention is to provide a branch assembly for a distribution board that allows a bus bus bar to be quickly and easily fitted and maintain a stable connection state.

Herein, the technical problems and objects to be solved by the present invention are not limited to the technical problems and objects mentioned above, and other technical problems and objects not mentioned will be clearly understood by those skilled in the art from the following description.

Specific means according to an aspect for realizing a new idea for solving the technical problem of the present invention as described above, and achieving the object and effect of the present invention, are at regular intervals vertically on one side. Insulated case with multiple slots into which busbars for supplying power to each phase are inserted, through holes on the opposite side, air vents to discharge internal air or inflow outside air for cooling, and bolt inserts vertically inside , Mounted inside the insulating case, one end is exposed to the upper surface of one of the slots and contacts the upper surface of the bus bus bar, and the opposite end is exposed through the through hole, and a first A branch booth bar with a clearance hole, mounted inside the insulating case, and one end of the slot is exposed to the bottom surface of one of the slots in a state opposite to the branch bus bar, and is resilient by elastic deformation with the bottom surface of the bus bar. The bus bar is inserted into the insulating case in a state of being screwed with a screw hole of the clamping tub through a clamping tub with a screw hole drilled at the opposite end and a screw hole at the opposite end, and when tightening, the clamping tub is raised to raise the bus bar. A tightening bolt that pressurizes the lower surface of the insulating case, a passage part formed on the lower surface of the insulating case for air circulation and moisture discharge inside the distribution panel, a bore part formed to bury the head of the tightening bolt on the upper part of the bolt insertion part, and the bore part Guide grooves formed in the front and rear sidewalls, locking holes formed in the left sidewalls of the bore, and the head of the tightening bolt are inserted along the guide grooves only when they are completely buried in the bore, and elastically in the locking hole at one end. It proposes a branch assembly for a distribution board comprising a locking cover formed with a hook that is elastically fitted by deformation to maintain a locked state.

Accordingly, the present invention has a new effect in that it is possible to immediately confirm with the naked eye that the branch bus bar is completely and firmly fixed to the bus bus bar in the process of assembling in the distribution board, so that the assembly work is made quickly and easily.

In addition, in a preferred embodiment of the present invention, the locking cover extends from the opposite end to cover and protect the opposite end of the branch bus bar protruding to the outside through the through hole of the insulating case. It is configured to further include an integrally formed cut-off part to prevent accidental contact with the connection part between the branch booth bar and the branch circuit breaker, and secure phase-to-phase insulation to prevent flash over, arc discharge, spark, etc. Various electrical safety accidents that may occur can be prevented.

In addition, a preferred embodiment of the present invention is to maintain the vertical portion formed by bending at one end of the clamping jaw and the vertical portion in a fitted state to prevent one end of the clamping jaw from freely moving or disengaging, and the tightening bolt It is configured to further include an elevation guide groove formed on the lower surface of the slot portion to guide the rise of the clamping jaw during tightening, so that the bus bus bar is quickly and easily inserted and a stable connection state with the branch bus bar can be maintained.

In addition, in a preferred embodiment of the present invention, the tightening bolt is formed in the form of a flange bolt in which a washer is integrally attached to the head, and the height between the bottom surface of the bore and the bottom surface of the locking cover Is formed with a height equal to the height of the head or within an allowable error range from a predetermined reference value, and is formed integrally with a settling groove recessed at a predetermined depth in the bottom surface of the bore part around the bolt insertion part, and an upper side of the settling groove , By further comprising a fracture portion falling into the settling groove while being cut by the clamping force of the tightening bolt, and a cutout portion having a relatively thin thickness at a portion connected to the bottom surface of the bore portion to facilitate fracture of the fracture portion. It is possible to immediately visually check the fixed status of the bus bus bar and branch bus bar by checking the condition of the first broken part without the need to attach the locking cover.

According to the technical idea and embodiment of the present invention on which a unique solution is based to solve the above technical problems, the state in which the branch booth bar is completely and firmly fixed to the bus bus bar in the process of assembling in the distribution panel is actually Assembly work can be made quickly and easily because it can be checked with the naked eye through the position of the tightening bolt without looking.

That is, the head of the tightening bolt must be completely inserted into the bore and the gap between the upper surface of the head and the locking cover covering the top of the bore must be within a certain range. It is possible to easily and accurately identify the state in which the bolt is fully tightened in the clamping jaw.

Therefore, the assembly work for fixing the busbar and branch busbars can be quickly, easily and efficiently performed, thereby improving the ease and convenience of work, thereby improving work efficiency as well as increasing productivity.

In addition, the fractured portion is formed on the bottom surface of the bore portion facing the lower surface of the head of the tightening bolt, so it is possible to easily check the fixed state of the busbar and branch busbars through the position and state of the fractured part that changes according to the tightening of the tightening bolt. Of course, since the tightening bolts are tightened more tightly, it is possible to keep the busbar and branch busbars in a more stable and solid state.

Moreover, since the blocking part of the locking cover covers and protects the exposed part of the branch booth bar, it prevents contact between the branch booth bar and the branch breaker due to the carelessness of the operator, thereby improving maintenance efficiency and preventing electric shock, ground fault, short circuit accident, etc. Various electrical safety accidents can be prevented.

Here, the effects of the present invention are not limited to the above-mentioned effects, and other effects that are not mentioned will be clearly understood by those skilled in the art from the description of the claims.

1 is a perspective view showing a branch assembly for a distribution board according to an embodiment of the present invention.
2 is an exploded perspective view showing a branch assembly for a distribution board according to an embodiment of the present invention.
3 is an exploded perspective view showing some of the components of a branch assembly for a distribution board according to an embodiment of the present invention.
4 is a perspective view showing some of the components of a branch assembly for a distribution board according to an embodiment of the present invention.
5 is a side cross-sectional view illustrating a state of use of a branch assembly for a distribution board according to an embodiment of the present invention.
6 is a side cross-sectional view for explaining a use state of a branch assembly for a distribution board according to an embodiment of the present invention.
7 is a perspective view for explaining another state of use of the branch assembly for a distribution board according to an embodiment of the present invention.
8 is a side cross-sectional view showing an enlarged local portion of a branch assembly for a distribution board according to another embodiment of the present invention.
9 is a partially enlarged side cross-sectional view illustrating a use state of a branch assembly for a distribution board according to another embodiment of the present invention.

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

Prior to this, the terms to be described later are defined in consideration of functions in the present invention, and this should be interpreted as a concept conforming to the technical idea of the present invention and a meaning commonly or commonly recognized in the art.

In addition, when it is determined that a detailed description of known functions or configurations related to the present invention may obscure the subject matter of the present invention, a detailed description thereof will be omitted.

Herein, the accompanying drawings are partially exaggerated or simplified for explanation of the configuration and operation of the technology, and for convenience and clarity of understanding, and it is understood that each component does not exactly match the actual size and shape.

In addition, in the present specification, the term and/or means a combination of a plurality of related items or any item among a plurality of related items, and when a certain part includes a certain element, it is a particularly opposite description. Unless there is no other component is not excluded, it means that other components can be further included.

That is, it means that the features, numbers, steps, actions, components, parts, or combinations of these described in the present specification exist, and one or more other features or numbers, step-action components, parts, or a combination thereof It is to be understood that they do not exclude the possibility of their existence or addition.

In addition, the meaning of the terms "unit" and "unit" refers to a unit or a module type that processes at least one function or a certain operation desired in the system, which is hardware or software, or a combination of hardware and software. It may be implemented as a device or assembly capable of performing an independent operation or means through the like.

In addition, terms such as top, bottom, top, bottom, or top, bottom, top, bottom, front and rear, left and right are used for convenience to distinguish the relative positions of each component. For example, the upper part on the drawing may be named or referred to as the upper part and the lower part as the lower part, the length direction as the front-rear direction, and the width direction as the left-right direction.

Also, terms such as first and second may be used to describe various components. That is, terms such as first and second may be used only for the purpose of distinguishing one component from another component. For example, a first component may be referred to as a second component without departing from the protection scope of the present invention, and a second component may also be referred to as a first component.

1 to 5, the main components of the branch assembly for a distribution board according to an embodiment of the present invention include an insulating case 10, a branch bus bar 20, a clamping jaw 30, and a tightening bolt 40. ), includes a bore portion 50 and a locking cover 60.

The insulating case 10 has an external shape of an insulator and accommodates the branch bus bar 20, the clamping tub 30, and the tightening bolt 40 therein.

In addition, on one side of the insulating case 10 (on the left as seen in FIG. 5), a plurality of slots 11 into which the bus bus bars supplying power for each phase are inserted are formed vertically at regular intervals, and the opposite side (Fig. As seen in Fig. 5, a through hole 12 is formed in the middle portion of the right side) through which the load side of the branch bus bar 20 passes and is exposed to the outside.

Here, in general distribution boards, a 4-pole wiring breaker is used, and the bus bus bar has an R-phase, S-phase, T-phase, and N-phase arranged vertically, so that the slot 11 is formed by connecting the branch bus bar to the required phase. It is preferable to form parallel to the four phases of the bus bar.

In addition, on the opposite side of the insulating case 10 (right side as seen in FIG. 5), a plurality of air vents 13 for discharging internal air or introducing external air for cooling are formed vertically at regular intervals.

And in the inner center of the insulating case (10), insert the screw portion of the tightening bolt (40) to naturally tighten it into the screw hole (31) of the clamping jaw (30), so that it is 2-5mm higher than the diameter of the tightening bolt (40). A bolt insertion portion 14 is formed in the form of a hole, and a passage portion 15 is formed on the lower surface for air circulation and moisture discharge inside the distribution panel.

In addition, a fixing part 19 is formed around the bolt insertion part 14 for stably fixing and supporting the branch bus bar 20 so as to be naturally and easily positioned inside the insulating case 10.

Here, the depth of the bolt insertion portion 14 is preferably formed slightly longer than the length of the threaded portion 42 of the tightening bolt 40, that is, the length of the portion excluding the head 41.

And at the edge of the bottom surface of each of the slots 11, an elevation guide that guides the rise of the clamping jaw 30 when tightening the tightening bolt 40 while preventing the free end of the clamping jaw 30 from freely moving or detaching. A groove 11a is formed.

That is, the elevating guide groove 11a serves to guide and hold the vertical portion 32 of the clamping jaw 30 to move up and down without shaking left and right while stably maintaining the fitted state.

In addition, a support portion 11b for supporting one end of the branch bus bar 20 so as not to move is formed on the ceiling surface of each of the slot portions 11.

In addition, a tag mounting portion 16 is formed on the upper surface of the insulating case 10 to mount a tag capable of displaying and distinguishing each phase of power to which the branch bus bar 20 is connected.

For example, the R-phase is black, the S-phase is red, the T-phase is blue, and the N-phase is white or gray tags may be fitted or attached to the tag mounting unit 16 by a slider method.

Here, the insulating case 10 may be made of a material having insulation and flame retardancy.

In addition, the insulating case 10 may be injection-molded in a symmetrically divided form around the axis of the bolt insertion part 14, and in this case, one insulating case 10a and the opposite insulating case 10b are integrally fixed. In order to maintain the state, grooves and protrusions that are coupled by force-fitting method may be formed to correspond to the edges of faces facing each other, or may be assembled by a bolting method.

Meanwhile, a plurality of connection grooves 17 and connection protrusions 18 are formed on the front and rear surfaces of the insulating case 10 so that other insulating cases assembled adjacent to each other are stably connected to each other without distortion.

The branch bus bar 20 is supported and mounted on the fixing part 19 inside the insulating case 10.

That is, when viewed from the front, the branch bus bar 20 is bent in a stepwise shape, and one end (left when viewed in FIG. 5) is one of the slots 11 so as to contact the upper surface of the bus bar. It is exposed on one upper surface, and the opposite end (right side as seen in FIG. 5) is exposed through the through hole 12 of the insulating case.

In addition, a first clearance hole 21 through which the screw portion of the tightening bolt 40 passes is drilled in the middle portion of the branch bus bar 20, and the end portion exposed through the through hole 12 of the insulating case is branched. A second clearance hole 22 for connecting the power supply side of the circuit breaker and the screw connection method is provided.

Here, the branch bus bar 20 is preferably formed of a material having excellent electrical conductivity, such as copper or aluminum.

The clamping jaw 30 is inside the insulating case 10 so as to securely maintain a fixed and contact state with the bus bus bar by adjusting the gap with the branch bus bar 20 while ascending and descending according to the rotation direction of the tightening bolt 40. Equipped.

In addition, the free end of the clamping jaw 30 is formed in a curved shape so as to be in contact with the lower surface of the bus bus bar elastically by elastic deformation.

That is, the free end of the clamping jaw 30 can respond flexibly to external force and behave due to the elastic force caused by bending and curvature changes.

In addition, one end of the clamping jaw 30 (left as seen in FIG. 5) is exposed on the lower surface of any one of the slots 11 in a state opposite to the branch booth bar 20, and the opposite end (Fig. As seen in 5), a screw hole 31 for connecting by screwing with the tightening bolt 30 is formed on the right side.

In addition, the free end of the clamping jaw 30 is bent with a vertical portion 32 that is fitted into the lifting guide groove 11a of the insulating case in a state capable of being lifted.

Here, the clamping jaw 30 may be formed through press molding in which a metal plate having a certain rigidity and elasticity is processed into a predetermined curved surface.

The tightening bolt 40 is inserted into the insulating case 10 so as to raise the clamping jaw 30 during tightening to pressurize and adhere to the lower surface of the bus bus bar M.

That is, the screw portion 42 of the tightening bolt 40 is connected to the screw hole 31 of the clamping jaw in the inside of the insulating case 10 through the bolt insertion portion 14 of the insulating case by screwing.

Here, the tightening bolt 40 is preferably made in the form of a flange bolt in which a washer 41a is integrally attached to the head 41, which is the head.

In addition, the length of the tightening bolt 40 may be formed differently depending on the position of the clamping jaw 30 mounted on any one of the slots 11.

For example, as shown in FIG. 3, when the clamping jaw 30 is mounted on the uppermost slot 11 of the slots 11 of the insulating case, the head 41 of the tightening bolt 40 is In a state buried in the bore portion 50 and fully tightened, the lower end of the screw portion 42 may be formed to have a length exposed and positioned through the screw hole 31 of the clamping jaw.

The bore portion 50 is formed in the form of a space in which the upper edge portion of the insulating case 10 is empty by a predetermined height to bury the head 41 of the tightening bolt.

That is, the bore portion 50 is formed so that a part of its bottom surface communicates with the upper portion of the bolt insertion portion 14.

And a guide groove 51 is formed in the front and rear side walls of the bore part 50 to guide the locking cover 60 to be fitted in a sliding manner only when the head 41 of the tightening bolt 40 is completely buried therein. have.

In addition, a locking hole 52 is formed in the left side wall portion of the bore portion 50 to maintain the engaged state by inserting the locking cover 60.

Here, the height h1 between the bottom surface of the bore 50 and the bottom surface of the locking cover 60 is the same as the height h2 of the head 41 of the tightening bolt or is formed to a height within the tolerance range from a predetermined reference value. It is desirable.

For example, the height from the bottom of the bore 50 to the bottom of the locking cover 60 is 15 mm in a state where the locking cover 60 is slidingly inserted along the guide groove 51 of the bore 50 When the tightening bolt 40 may be adopted that the height of the head 41 is 13 ~ 15mm.

The locking cover 60 is formed to be inserted along the guide groove 51 only in the state where the head 41 of the tightening bolt 40 is completely buried in the bore portion 50.

And one end (left as seen in FIG. 5) of the locking cover 60 is elastically deformed when receiving an external force, and is elastically inserted into the locking hole 52 of the bore 50 to maintain the locked state. A hook 61 is formed.

That is, the locking cover 60 serves to prevent loosening of the tightening bolt 40 by causing contact interference with the head 41 of the tightening bolt 40 while closing the opening of the bore part 50.

In addition, the opposite side of the locking cover 60 (right side as seen in FIG. 5) is a block that covers and protects the load-side end of the branch bus bar 20 protruding to the outside through the through hole 12 of the insulating case. The portion 62 is integrally formed.

That is, the blocking unit 62 may prevent a safety accident such as an electric shock that may occur during assembly work by blocking the exposure of the load-side end of the branch booth bar 20 and the connecting portion of the branch breaker.

In addition, stoppers 63 are formed at both corners of the blocking part 62 facing the bore part 50 to prevent contact interference with the insulating case 10 from being inserted into the bore part 50 to a certain depth or more. have.

Here, the locking cover 60 may be formed in a flat plate shape using a transparent material and a material having flame retardancy, insulation and elasticity so that the inside of the head 41 and the bore part 50 of the tightening bolt 40 are projected and visible. have.

The main operation and principle of the branch assembly for a distribution board according to an embodiment of the present invention will be described as follows.

First, as shown in FIG. 5, the power of each phase in the distribution board is supplied to the slot 11 in which the branch bus bar 20 and the clamping jaw 30 are mounted among the slots 11 of the insulating case 10. In the state in which the supplied bus bus bar (M) is inserted (actually, the branch assembly is mounted on the bus bar), by rotating and tightening the tightening bolts 40, it can be mounted on the bus bus bar (M) and firmly fixed.

At this time, as shown in Figure 5 (a), the screw hole 31 of the clamping jaw 30 is connected by screwing with the tightening bolt 40, and the vertical part 32 is in contact with the elevating guide groove 11a. Since it is in a state of interference, even if the tightening bolt 40 is tightened and lowered, the clamping jaw 30 does not rotate within the insulating case 10 as shown in FIG. The branch booth bar 20 can be stably adhered to the lower surface of ).

In addition, as shown in Fig. 6, the head 41 of the tightening bolt 40 is located in the bore portion 50, and a locking cover covering the upper surface of the head 41 and the opened upper portion of the bore portion 50 (60) Only when the gap between the lower surfaces is within a certain range, the locking cover 60 can be fitted in a sliding manner along the guide groove 51 of the bore portion 50 to be coupled in a form of covering.

That is, if the tightening bolt 40 is in a state where the clamping jaw 30 is fully tightened, the head 41 is completely buried inside the bore part 50, and only then the locking cover 60 is Since it is a structure that closes naturally without contact interference with (40), it is possible to immediately check with the naked eye that the branch bus bar (20) is completely and firmly fixed to the bus bus bar (M). And can be done easily.

In addition, the locking cover 60 increases the fixing force due to contact interference with the head 41 of the tightening bolt 40, and thus prevents loosening of the tightening bolt 40 even if it is used for a long time. Durability and reliability can be improved because the pressing force is stably maintained.

On the other hand, as shown in FIG. 7, when other insulating cases 10 adjacent to the front and rear surfaces of the insulating case 10 are connected to each other and mounted, the locking cover 60 ′ is integrated with the blocking part 62. By forming, it is possible to more reliably block and protect the load-side end of the branch bus bar 20 protruding to the outside through the through hole 12 of the insulating case and the connection portion of the branch circuit breaker.

On the other hand, as shown in Figs. 8 and 9, the branch assembly for a distribution board according to another embodiment of the present invention includes an insulating case 10, a branch bus bar 20, a clamping jaw 30, a tightening bolt 40, It includes a bore part 50 and a locking cover 60.

Among them, the bore portion 50 further includes a set groove 53, a fracture portion 54, and a cutout portion 55.

The mounting groove 53 is recessed to a predetermined depth around the upper edge of the bolt insertion portion 14 among the bottom surface of the bore portion 50.

The fractured portion 54 is integrally connected to the upper side of the seating groove 53 so as to be dropped and received into the seating groove 53 while being cut off by the tightening force of the tightening bolt 40.

That is, the area of the fractured portion 54 is formed slightly narrower than the area of the receiving groove 53 so that it can be naturally seated and accommodated in the receiving groove 53, and the thickness of the fractured portion 54 is It is formed equal to the depth of ).

Here, the fracture portion 54 may be connected to the bottom surface of the bore portion 50 by a notch-shaped cutout 55 having a thin thickness.

The cutout 55 is formed to have a relatively thin thickness at a portion connected to the bottom surface of the bore portion 50 so that the breaking portion 54 can be easily broken when the tightening bolt 40 is tightened.

In other words, the cutout 55 is broken as if torn naturally by the force applied when the tightening bolt 40 is tightened, and the fractured portion 54 is separated from the bottom surface of the bore part 50 and into the settling groove 53. To be inserted.

The branch assembly for a distribution board according to another embodiment of the present invention configured as described above includes the slot 11 in which the branch bus bar 20 and the clamping jaw 30 are mounted among the slots 11 of the insulating case 10 In the process of tightening by turning the tightening bolt 40 while inserting the bus bar for supplying power to each phase in the distribution panel, the broken part 54 naturally breaks along the cutout 55 and is inserted into the seat groove 53 Can be.

In this case, by checking the location and status of the broken part 54 before joining the locking cover 60, the branch booth bar 20 is actually completely and firmly fixed to the bus bus bar M. Can be easily and accurately identified without the need.

In addition, the tightening bolt 40 may be more tightly fastened without loosening due to contact interference of the fractured portion 54.

Therefore, since the tightening bolt 40 is not easily loosened due to vibration, impact, radial stress, or deformation, it is possible to maintain the fixed state of the bus bus bar M and the branch bus bar 20 more stably and firmly.

Here, among the components related to the branch booth bar assembly for a distribution board according to another embodiment of the present invention, components having the same or similar effect as the above-described embodiment use the same reference numerals, and repetitive and detailed descriptions thereof are omitted. do.

On the other hand, the present invention is not limited by the above-described embodiment and the accompanying drawings, and can be variously modified and applied in various ways that are not illustrated within the scope not departing from the technical spirit of the present invention. It will be apparent to those of ordinary skill in the art that the substitution of components and the possibility of wide application by changing to other equivalent embodiments are possible.

Therefore, the content related to the modification and application of the technical features of the present invention should be interpreted as being included within the spirit and scope of the present invention.

10: insulation case 11: slot
11a: elevating guide groove 12: through hole
13: air vent 14: bolt insert
15: passage portion 16: tag mounting portion
17: connecting groove 18: connecting protrusion
19: fixed part 20: branch booth bar
21: first clearance hall 22: second clearance hall
30: clamping jaw 31: screw hole
32: vertical part 40: tightening bolt
41: head 50: bore
51: guide groove 52: locking hole
53: set groove 54: fracture
55: cutout 60: locking cover
61: hook 62: blocking portion

Claims (4)

On one side at regular intervals vertically, a plurality of slots into which busbars for supplying power to each phase are inserted are formed, and on the opposite side are formed through holes and a number of air vents for discharging internal air or introducing outside air for cooling, Insulation case in which the bolt insertion portion is formed in the vertical direction;
It is mounted inside the insulating case, one end is exposed to the ceiling surface of any one of the slots to contact the upper surface of the bus bus bar, and the opposite end is exposed through the through hole, and 1 Branch booth bar with a clearance hole;
It is mounted inside the insulating case, and one end is exposed to the bottom surface of any one of the slots in a state opposite to the branch bus bar, and elastically contacts the bottom surface of the bus bus bar by elastic deformation, and the opposite end A clamping tank having a screw hole formed therein;
A tightening bolt that is inserted into the insulating case in a state of being screwed with a screw hole of the clamping tank through the bolt insertion part, and pressurizes and adheres to the lower surface of the bus bus bar by raising the clamping tank when tightening;
A bore formed in the upper portion of the bolt insertion portion to bury the head of the tightening bolt;
Guide grooves formed on the front and rear side walls of the bore;
A locking hole formed on the left side wall of the bore;
A locking cover that is inserted along the guide groove only when the head of the tightening bolt is completely buried in the bore portion to cover the upper surface opening of the bore portion;
A hook formed at one end of the locking cover and elastically fitted into the locking hole by elastic deformation to maintain a locked state of the locking cover; And
A passage portion formed on a lower surface of the insulating case to circulate air and discharge moisture inside the distribution panel;
Branch assembly for a distribution board comprising a.
The method of claim 1,
The locking cover,
A blocking part extending from the opposite end of the branch bus bar and integrally formed to cover and protect the opposite end of the branch busbar protruding to the outside through the through hole of the insulating case;
Branch assembly for a distribution board further comprising a.
The method of claim 1,
A vertical portion formed by bending at the free end of the clamping jaw; And
An elevation guide groove formed at an edge of the bottom surface of the slot portion to guide the elevation of the clamping jaw when the tightening bolt is tightened while maintaining the vertical portion in the inserted state to prevent the free end of the clamping jaw from moving or detaching freely;
Branch assembly for a distribution board further comprising a.
The method of claim 1,
The tightening bolt,
It is made in the form of a flange bolt with a washer integrally attached to the head,
The height between the bottom surface of the bore and the bottom surface of the locking cover is the same as the height of the head or is formed to a height within a tolerance range from a predetermined reference value,
A recess recessed at a predetermined depth around an upper edge of the bolt insertion portion of the bottom surface of the bore portion;
A fracture portion formed integrally on the upper side of the settling groove and falling into the settling groove while being cut off by the tightening force of the tightening bolt; And
A cutout portion having a relatively thin thickness at a portion connected to the bottom surface of the bore portion to facilitate breaking of the broken portion when the tightening bolt is tightened;
Branch assembly for a distribution board further comprising a.

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