JPH0145209Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a unit type band-shaped conductor support insulator for supporting a plurality of band-shaped conductors installed in, for example, a switchboard.

[Prior Art] In this type of unit type support insulator for a band-shaped conductor, what has been generally known in the past includes:
For example, there was one described in Japanese Utility Model Application Publication No. 57-168923. This conventional unit-type support insulator for band-shaped conductors has a plurality of flat band-shaped conductors having a predetermined wall thickness arranged in the width direction and attached and fixed one by one to a fixing member. In order to separate the plurality of band-shaped conductors from each other by a desired insulation distance, the band-shaped conductor support insulating units are stacked vertically in multiple stages, and the band-shaped conductor is attached to the top surface of the topmost band-shaped conductor support and insulating unit. , the heights of the attached strip-shaped conductors are made to differ by making the number of stacked stages of the strip-shaped conductor supporting insulating units different;
The insulation distance was maintained by the difference in height.

However, if this type of conventional support insulator for band-shaped conductors is of a type in which a plurality of band-shaped conductors are arranged and fixed in the width direction, the width of the band-shaped conductors is wide. The disadvantage is that a large area is required to install and fix the strip-shaped conductor, and in places where a large installation area cannot be secured, the number of strip-shaped conductors that can be attached is limited. Ta. Moreover,
The support and insulation units for the strip-shaped conductor stacked vertically are fixed with long screws that reach from the top level to the fixing member, so it is difficult to increase the number of stacked stages of the support and insulation units for the strip-shaped conductor. The larger the number of strip conductors, the longer the correspondingly longer screws are required, and it is necessary to manufacture screws of various lengths to accommodate changes in the number of stacked stages of the support insulating units for strip conductors depending on the number of strip conductors installed. This inevitably leads to the inconvenience of increasing costs due to high-mix, low-volume production. In reality, it is not possible to manufacture so many types of screws in order to prevent cost increases, and the number of stacking stages of the supporting insulating unit for the strip-shaped conductor is limited. This has the disadvantage that the number of bodies may be restricted.

Therefore, it has been generally known that a plurality of strip-shaped conductors are arranged in the thickness direction and connected and supported to solve the problems of the installation space and the limitations on the number of strip-shaped conductors that can be attached. The item shown in Figure 1 was found.

In FIG. 1, strip-shaped conductors 1a, 1b, 1
c runs from the paper surface direction to the paper back direction. Each strip-shaped conductor 1a, 1b, 1c is composed of two strip-shaped conductors slightly spaced apart from each other.
The band-shaped conductors 1a, 1b, and 1c of each phase are fitted into grooves A and B of supporting insulators 2a and 2b arranged above and below, and are thereby separated from each other by a predetermined distance between the phases. ing. Each phase conductor 1a,
1b and 1c, a tightening bolt 4 passing through an L-shaped support frame 3 between each phase conductor of support insulators 2a and 2b;
It is supported by a support frame 33 by a tightening nut 5 and an insulating cylinder 6 through which a tightening bolt 4 is passed, so as to be sandwiched between supporting insulators 2a and 2b.

In other words, the support insulator for a strip-shaped conductor shown in FIG. 1 connects and supports a plurality of strip-shaped conductors arranged in the thickness direction. The support and insulator for the body is attached and fixed to a predetermined fixing member consisting of the support frame 3, and in order to attach and fix the strip-shaped conductors side by side in the thickness direction, the width of the strip-shaped conductors is wide. Even if it gets old, it does not require a large amount of installation space.

[Problem to be solved by the invention] However, in the conventional support and insulator for conductors shown in Fig. 1, when a large short-circuit current flows through the conductors 1a, 1b, and 1c of each phase, a short circuit occurs between the conductors. Conductor 1 formed by grooves A and B by electrodynamic force
Due to reasons such as a, 1b, and 1c becoming unlatched,
There was a drawback that the conductors 1a, 1b, 1c were deformed, the supporting insulators 2a, 2b were damaged, and the conductors came into contact with equipment installed in the switchboard, which could further aggravate the accident. Especially recently,
As the power supply capacity of electrical systems increases, the short-circuit current in the event of a short-circuit accident is also increasing, which increases the risk of accidents due to deformation of busbars and damage to support equipment due to thermal and electrical stress during accidents. Expansion is a problem. Therefore, for example, in a constant voltage circuit, a short circuit current of about 100 kA will cause a
A support insulator that can withstand seconds is desired. However, the conventional support and insulator for conductors shown in FIG. 1 could not meet the above requirements.

On the other hand, in the conventional device shown in FIG. 1, for example, only the phase conductors 1a and 1c on both sides are supported and fixed by supporting insulators 2a and 2b, without attaching and fixing each phase conductor 1b. , attached and fixed band-shaped conductors (each phase conductor 1a, 1
c) It has the advantage that the interval between them can be changed as appropriate. However, on the other hand, in order to support and fix a large number of band-shaped conductors, supporting insulators 2a, 2b
It is necessary to prepare a long one with a large number of grooves A and B formed therein. In other words, multiple types of supporting insulators 2 can be used depending on the number of strip-shaped conductors installed.
A and 2b had to be manufactured, which had the disadvantage of unavoidably increasing costs due to high-mix, low-volume production. However, in reality, the supporting insulators 2a, 2
In order to reduce the cost of the support insulators 2a and 2b, it is not possible to manufacture so many types of support insulators 2a and 2b, and as a result, the number of strip-shaped conductors that can be supported and fixed is ultimately limited.

In short, the support insulator for strip-shaped conductors arranged in the thickness direction shown in FIG. Various inconveniences occur, such as deformation of the strip conductor and damage to supporting insulators due to short-circuit current.
The demand for cost reduction through mass production of a small number of supporting insulators and the demand for the freedom to install as many strip-shaped conductors as necessary without any restrictions are in conflict, and it is difficult to meet both demands. The drawback was that I was not satisfied.

In view of these circumstances, the present invention takes advantage of the mounting and fixing space advantages of the support insulator for strip-shaped conductors arranged in the thickness direction, while minimizing the various inconveniences caused by short-circuit currents. The purpose is to satisfy both the demand for cost reduction through mass production of various products and the demand for lifting restrictions on the number of strip-shaped conductors to be installed.

[Means for Solving the Problems] The present invention involves interposing flat strip-shaped conductors having a predetermined wall thickness, so that the strip-shaped conductors are arranged in the thickness direction at a predetermined distance from each other. a mounting fixing part that includes a plurality of band-shaped conductor support insulating units for connection and for attaching and fixing the band-shaped conductor support insulating unit that connects and supports the plurality of band-shaped conductors to a predetermined fixing member; A unit-type supporting insulating device for a strip-shaped conductor, wherein each of the plurality of support and insulating units for a strip-shaped conductor has a predetermined length to separate the strip-shaped conductors by a desired distance. and a pedestal portion integrally formed with an insulating material on one end surface of the copper portion and having through holes of a predetermined pitch formed therein; 1 of the pedestal portion of the conductor support insulating unit
A screw hole is formed into which a screw shaft for screw fixation inserted into the pair of through holes is screwed, and at least the other end surface and the bottom surface of the pedestal part of the other band-shaped conductor support insulating unit The present invention is characterized in that a clamping and holding surface capable of clamping and holding the strip-shaped conductor is formed by screwing in the screw shaft while sandwiching the conductor and tightening and fixing the supporting and insulating units for the strip-shaped conductor.

[Function] In the present invention, by interposing a strip-shaped conductor support insulating unit between flat strip-shaped conductors having a predetermined wall thickness, the strip-shaped conductors are separated from each other by a predetermined distance and their wall thickness is reduced. They are connected in a direction. And the band-shaped conductor support insulating unit that connects those band-shaped conductors is
It is attached and fixed to a predetermined fixing member by the attachment fixing part. In addition, since the band-shaped conductor support insulating unit has a body portion having a predetermined length, the band-shaped conductor support insulating unit having the body portion can be interposed between the band-shaped conductors. may be separated by at least a predetermined length of the body. Further, a pedestal part is integrally formed with an insulating material on one end side of the body, and a pair of through holes are bored in the pedestal part at a predetermined pitch.
A screw shaft for screwing and fixing is inserted into the pair of through holes, and a screw shaft is inserted into the pair of through holes.
It can be screwed into a pair of screw holes. Then, the screw shaft is screwed into the screw hole with the band-shaped conductor held between at least one end surface of the body and the bottom surface of the pedestal of the other band-shaped conductor support and insulating unit, and the band-shaped conductor is By tightening and fixing the body support insulating units to each other, it becomes possible to sandwich and hold the band-shaped conductor.

In other words, in order to connect and support the strip conductors by arranging them in the thickness direction, it is possible to take advantage of the installation and fixing space advantage of the support and insulator for strip conductors arranged in the thickness direction. A band-shaped conductor support insulating unit is interposed between the conductors, and in order to connect the band-shaped conductors in a state where they are completely fitted, the interposed band-shaped conductor support insulating unit plays the role of a spacer and is placed in a predetermined position. Correlation connection is firmly performed while the correlation distance is reliably maintained, and various inconveniences caused by short-circuit currents can be prevented as much as possible. Moreover, due to the other end surface of the body of one band-shaped conductor supporting and insulating unit and the bottom surface of the pedestal part of the other band-shaped conductor supporting and insulating unit,
In order to be able to sandwich and hold the band-shaped conductor, even when connecting and holding a large number of band-shaped conductors, it is possible to prepare a plurality of band-shaped conductor support insulating units of the same type,
When these band-shaped conductor support insulating units are arranged, a plurality of clamping and holding surfaces are formed by the bottom surface of the pedestal and one end surface of the body, which face each other. By supporting each body, a plurality of strip-shaped conductors can be supported. In other words, even if only one type of band-shaped conductor support insulating unit is prepared, it is possible to connect and support any number of band-shaped conductors, and it is possible to reduce costs by mass producing a small number of band-shaped conductor support insulating units. There is no restriction on the number of conductors to be installed.

[Embodiment of the invention] Next, an embodiment of the invention will be described in detail based on the drawings.

FIGS. 2 and 3 are an upper perspective view and a lower perspective view showing a support insulator for a band-shaped conductor, which is an example of a band-shaped conductor support and insulator unit used in the unit type support insulator for a band-shaped conductor of the present invention. It is. Referring to FIGS. 3 and 3, the supporting insulating part 10 for a band-shaped conductor according to this embodiment has a pair of screw holes 12, which are examples of screw holes, on one end surface 11, separated by a predetermined pitch.
The main body 13 includes a body portion 13 in which portions a and 12b are formed, and a pedestal portion 14 integrally formed with an insulating material on the other end side of the body portion 13. This pedestal part 14 has a body part 13
The diameter direction of the pair of screw holes 12a, 12b (second
Please refer to the dash-dotted line X in the figure. ) A pair of through holes 15a and 15b are formed at the same pitch in a direction substantially perpendicular to the dotted line Y in FIG. 2.

Further, on the back surface of the pedestal portion 14, a mounting groove 16, which is an example of a mounting and fixing portion, is formed. The peripheries of the through holes 15a and 15b protrude from the mounting groove 16, and end surfaces 15c and 15d thereof are flush with the back surfaces of the end portions 17a and 17b of the pedestal portion 14.

Next, an example of use of the embodiment shown in FIGS. 2 and 3 will be described.

4 and 5 are a plan view and a side sectional view showing the inside of a switchboard to which the embodiment shown in FIGS. 2 and 3 is applied. Although only a part is shown in FIG. 4, a plurality of unit boards 20 are connected and extended in the left-right direction of the figure, and three-phase conductor busbars 21a, 21b are arranged in parallel inside the unit board 20. 21
c is arranged to penetrate the side walls 20a, 20b of the unit board body 20.

Each phase conductor bus bar 21a, 21b, 21c is arranged at a predetermined distance between different phases, and the band-shaped conductor support insulation of this embodiment is used to connect the phase conductor bus bar 21a, 21b, 21c. Item 10 is used. That is, the circle B in FIG. 4A and FIG. 5 is an enlarged perspective view of the circle A in FIG.
As is clear from FIG. 6, which is an enlarged view of FIG. Two conductor support insulators 10,1
0 is arranged so that the pedestals 14 face each other and the through holes 15a and 15b match each other. And each matching through hole 15a,
At 15b, leg portions 22a and 22b of a support frame member 22, which will be described later, are sandwiched and tightened with a tightening bolt 23 and a nut 24.

One end surface 1 of the body parts 13, 13 of the two conductor support insulators 10, 10 connected as described above
On the 1st and 11th sides, adjacent phase conductor busbars 21a,
21b, 21c, and a bolt 25, which is an example of a screw shaft, is in contact with each pair of screw hole portions 12a, 12b.
25 is supported by passing through each phase conductor bus bar 21a, 21b, 21c and fastening it.

As described above, each phase conductor bus bar 21a, 21
Each band-shaped conductor support insulator 10 that connects b and 21c is attached to a part of the switchboard frame (not shown) by a support frame member 22. That is, as is clear from FIG. 4A, the support frame member 22 is
c, and each phase conductor 21a, 21 from the fixed part 22c.
A pair of legs 22a, 2 extending parallel to b, 21c
2b, and has a shaped cross section in the side direction. The legs 22a, 22b are connected to the pedestals 14, 14 of the two conductor support insulators 10, 10, respectively, as shown in FIGS. 5 and 6.
is held in between. Although it is not clear from FIGS. 5 and 6, the mounting grooves 16 and
16 are formed. This mounting groove 16, 16
The legs 22a and 22b are fitted into the legs. In the example shown in FIG.
Selected twice. Therefore, the base portions 14, 14 of the two support insulators 10, 10 are in close contact with each other except for the mounting groove 16 into which the leg portion 22b is fitted.

Each phase conductor bus 21 connected as described above
a, 21b, 21c and the supporting insulators 10, 10, 10, 10 for the band-shaped conductor as connecting members,
As is clear from FIG. 5, the fixed portion 22c of the support frame member 22 is fixed and supported on the switchboard frame 26 by tightening bolts 27.

Returning to FIG. 4, the band-shaped conductor support insulator 10 of this embodiment includes long conductor busbars 21a for each phase,
They are attached at appropriate intervals in the longitudinal direction of 21b and 21c. Therefore, each phase conductor bus bar 21
Even if a large short-circuit current flows through a, 21b, and 21c, the deformation of each phase conductor bus 21a, 21b, and 21c is reliably suppressed, preventing accidents such as contact with other equipment in the switchboard or other phase conductor buss. can be effectively prevented.

FIG. 7 is a plan view showing a second example of use of this invention. Referring to Figure 7, switchboard unit board 2
0, phase conductor busbars 21a, 21b, and 21c (21b and 21c are not shown in FIG. 7 because they overlap) are arranged so that their main surfaces are in the horizontal direction. This conductor bus 2 for each phase
Branch vertical conductors 31a, 31b, 31c are vertically connected to 1a, 21b, 21c, respectively. Each branch vertical conductor 31a, 31b, 3
Reference numeral 1c is for extracting power from each phase conductor bus bar 21a, 21b, 21c, and is a conductive member in the form of a long strip like the phase conductor bus bar 21a, 21b, 21c. In the example shown in FIG. 7, the conductor support insulator 10 of this invention is used to connect the branch vertical conductors 31a, 31b, and 31c of each phase. In addition, in FIG. 7, 32a, 32b,
32c shows a cross section of a branch conductor further branched from each phase branch vertical conductor for supplying power to the power supply of each device.

By the way, as is clear from FIG. 8 showing an enlarged view of the main part of FIG. 7 and FIG. 9 showing a side view thereof, each phase branch vertical conductor 31a, 31b, 31c
The distance between each phase conductor bus bar 21a, 2 described above is
This is 1/2 of the distance between 1b and 21c. Therefore, one conductor support insulator 10 is disposed between each of the vertical conductors 31a, 31b, and 31c to form a connection structure.

No. 10 showing an enlarged view of the part indicated by circle C in Fig. 8.
As is clear from the figure, vertical conductors 31a, 31
The support insulator 10 for the conductor placed between the vertical conductors 31b and 31c is rotated by 90 degrees around the central axis in the longitudinal direction of the support insulator 10 with respect to the support insulator 10 placed between the vertical conductors 31b and 31c. It is located. That is, the base portion 14 of one support insulator 10 is in contact with the vertical conductor 31a, and the one end surface 11 of the other body portion 13 is in contact with the vertical conductor 31b. Further, on the opposite side of this vertical conductor 31b, a pedestal portion 14 of the next conductor support insulator 10 is brought into contact with the pedestal portion 14 rotated by 90 degrees. Therefore, the screw holes 12a, 12a of one support insulator 10 and the through holes 15a, 15a of the other support insulator 10 are aligned with the vertical conductor 31b in the middle. 8th
As is clear from the figure, this aligned through hole 1
2 by inserting the tightening bolt 34 from the side of 5a, 15b and tightening it into the screw hole 12a, 12b.
The supporting insulators 10, 10 are connected by sandwiching the vertical conductor 31b.

Also, one end surface 1 of the body 13 is attached to the vertical conductor 31c.
On the outside of the support insulator 10 that is in contact with the support insulator 1, the support insulator 10 is further rotated by 90 degrees via a vertical conductor 31a. Also here, the tightening bolt 34 is inserted into the screw hole 12a, 12a of the inner support insulator 10 from the through hole 15a, 15a side of the outer support insulator 10 via the vertical conductor 31c.
It is tightened. Similarly, branch vertical conductor 31
Another conductor support insulator 10 is also attached to the outside of a.

As described above, each branch vertical conductor 31a, 31
b, 31c are integrally connected by two support insulators 10 for conductors, and furthermore, two support insulators 10 are attached to the outside thereof. Legs 35a and 35b of a support frame member 35, which will be described later with reference to FIG.
6,36.

As is clear from FIG. 10, the support frame member 35
has the same structure as the support frame member 22 shown in the previous usage example. That is, the fixed part 35c
and vertical conductors 31a, 3 from both ends of the fixed part 35c.
Legs 35a, 35b extending parallel to 1b, 31c
has. As shown in FIG. 9, the branch vertical conductors 31a, 31b, and 31c are supported by fixing the fixing portion 35c to a portion 36 of the switchboard frame using, for example, bolts and nuts.

As described above, the conductor support insulator 10 of this embodiment includes a pair of screw holes 12a, 12b and a pair of through holes 15 having mutually perpendicular span directions.
a and 15b are formed on both end faces, so even if the distances between the strip-shaped conductors to be connected are different, the purpose can be easily achieved by appropriately combining them.

Further, as shown in FIGS. 8 and 9, each conductor supporting insulator 10, which is adjacent in the longitudinal direction of each branch vertical conductor 31a, 31b, 31c,
10... are mounted in a state rotated by 90 degrees with respect to the central axis of the body 13, each vertical conductor 3
The connection structure of 1a, 31b, and 31c can also be made stronger. This is best shown in FIG.
Through-hole 1 of supporting insulators 10, 10 abutted on c
5a, 15a are attached so that the span distances thereof are perpendicular to the through holes 15a, 15a of the adjacent supporting insulators 10, so it is clear that the fixed portions of the vertical conductors are more widely distributed.

In the usage examples shown in FIGS. 8 and 9, the supporting insulators 10, 10 adjacent to each other in the longitudinal direction of the vertical conductors 31a, 31b, 31c are installed so as to be rotated by 90 degrees with respect to each other. If the vertical conductors are quite wide, instead of this, all the conductors may be installed so that the through holes 15a, 15a, which serve as the mounting holes of the support insulator 10, coincide in the width direction. Needless to say.

FIG. 11 is a perspective view showing a third usage example of the support insulator for a strip-shaped conductor of this invention. Here, the support insulator 1 for a conductor according to this invention will be simply described.
0 is fixed onto a fixed carrier 41 such as a wall surface by inserting tightening bolts 42, 42 into the through holes 15a, 15a of the pedestal 14 and tightening them, thereby fixing the support insulator 10 for the conductor. When the conductor support insulator 10 is properly fixed on the fixed carrier 41 in this way, the screw holes 12a and 12b formed in the one end surface 11 of the body 13 of the conductor support insulator 10 can be used. This allows the band-shaped conductor (not shown) to be easily fixed. As described above, by using the conductor support insulator 10 of this embodiment, it is possible to support a strip-shaped conductor in various situations.

[Effects of the invention] As described above, according to this invention, although it is possible to take advantage of the mounting and fixing space of the support insulator for strip conductors arranged in the thickness direction, it does not suffer from various disadvantages due to short-circuit current. It is possible to prevent this as much as possible, and moreover, it has the extremely great effect of satisfying both the requirements for cost reduction through mass production of a small number of products and the requirement for lifting restrictions on the number of strip-shaped conductors to be attached. In addition, the body and pedestal are integrally formed from insulating material and have a relatively simple structure, making mass production easy and further reducing costs. becomes.

[Brief explanation of the drawing]

FIG. 1 is a side sectional view showing an example of a conventional conductor support device. FIGS. 2 and 3 are an upper perspective view and a lower perspective view of a support insulator for a strip-shaped conductor according to an embodiment of the present invention. FIGS. 4 and 5 are a plan view and a side view showing an example of the use of an embodiment of this invention. Figure 4A shows the fourth
It is a perspective view enlarged and shown in circle A of a figure. FIG. 6 is an enlarged partial side view of the portion indicated by circle B in FIG. FIG. 7 is a plan view showing another example of use of this invention. FIGS. 8 and 9 are a plan view and a side view showing the main parts of FIG. 7 in an enlarged manner.
FIG. 10 is an enlarged perspective view of the portion surrounded by circle C in FIG. 8. FIG. 11 is a perspective view showing a third usage example of this invention. DESCRIPTION OF SYMBOLS 10...Supporting insulator for a band-shaped conductor as an example of a band-shaped conductor support insulating unit, 11...One end surface of the body, 12a, 12b...Screw hole as an example of a screw hole,
25... Bolt as an example of a screw shaft, 13... Body, 1
4... Pedestal portion, 15a, 15b... Through hole.

Claims (1)

[Claims for Utility Model Registration] (1) By interposing flat strip-shaped conductors having a predetermined wall thickness, the strip-shaped conductors are arranged and connected in the thickness direction at a predetermined distance. It includes a plurality of band-shaped conductor support insulating units for connecting and supporting the plurality of band-shaped conductors, and a mounting fixing part for attaching and fixing the band-shaped conductor support insulating units that connect and support the plurality of band-shaped conductors to a predetermined fixing member. A unit type support insulating device for a band-shaped conductor, wherein each of the plurality of support insulating units for a band-shaped conductor has a predetermined length that is predetermined to separate the band-shaped conductors by a desired distance. Also, a body part whose one end surface is formed into a surface capable of supporting a strip-shaped conductor, and a pair of through holes formed integrally with an insulating material on the other end side of the body part and separated by a predetermined pitch. and a pedestal portion with a hole formed therein, and a screw shaft for screw fixing inserted into a pair of through holes in the pedestal portion of another band-shaped conductor support insulating unit is screwed into one end surface of the body. A screw hole is drilled in the conductor, and the screw shaft is screwed in with the band-shaped conductor held between at least one end surface and the bottom surface of the pedestal portion of the other band-shaped conductor support insulating unit. A unit type support insulator for a band-shaped conductor, comprising a clamping and holding surface capable of pinching and holding the band-shaped conductor by tightening and fixing the body support insulating units to each other. (2) The utility model according to claim 1, wherein the distance between one end surface of the body and the bottom surface of the pedestal is selected to be 1/2 of the distance between adjacent phase conductors. Support insulator for unit type strip conductor.