JPS6237385Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a busbar supporting clamp section for supporting busbars used as busbars in substations, electrical rooms, etc.

When arranging multiple rectangular bus bars in the same pole, generally, taking into consideration the ease of connection and the effect of heat dissipation, a space is provided between the bus bars used, which is approximately the thickness of the bus bars, and the clamp section is set by a spacer. For example, Fig. 1 is a perspective view of a conventional clamp section, in which a square spacer 2 is sandwiched between rectangular bus bars 1a and 1b, and the rectangular bus bars 1a and
Clamp members 3a, 3b are placed on both sides of bus bar 1b, and fastening bolts 5 are inserted into bolt holes 4a, 4b, and nuts 6 are screwed in to secure bus bar 1.
The clamp members 3a and 3b are attached to a clamp seat plate 8 provided on an insulator 7 by means of fixing bolts 9. In this case, the spacer 2 is fixed to the rectangular bus bar 1.
Since the spacer 2 is simply sandwiched between the bus bars 1a and 1b, there is a high risk that the spacer 2 will fall off if the mounting position of the spacer 2 itself shifts or if large displacement occurs due to vibration of the bus bars 1a and 1b, thermal expansion, etc. Furthermore, the clamping portion of this type can only fix the rectangular bus bars 1a and 1b, and cannot adopt a semi-fixing or sliding fixing method for the bus bars.

The purpose of this invention is to eliminate the above-mentioned drawbacks, to fix the busbar without worrying about the spacer slipping or falling off, and to fix the busbar.
The purpose of the present invention is to provide a clamp section for supporting busbars that can adopt any method of semi-fixation or sliding fixation. The spacer is
It is characterized in that it has a plurality of bolt holes coaxial with the clamp member for the insertion of bolts, and grooves parallel to the surface are formed in at least part of the periphery of these bolt holes.

The present invention will be explained in detail based on the embodiment shown in FIG. 2 and below. Note that the same reference numerals as in FIG. 1 indicate the same members.

In FIG. 2, 10 is a rectangular bus bar 1a, 1
This spacer 10 is sandwiched between the clamp members 3a and 3b on both sides.
It is said to have almost the same shape. A bolt hole 11 is provided at the same position as the bolt holes 4a, 4b of the clamp members 3a, 3b, so that the tightening bolt 5 can be inserted together with the clamp members 3a, 3b. In the embodiment shown in FIG. 2, since the clamp members 3a and 3b are substantially triangular, the spacer 10 also has the same triangular shape. However, if the clamp members 3a and 3b are made into square plates, the spacer 10 also has the same shape. do it. Further, a groove 12 is formed around each bolt hole 11 of the spacer 10 in parallel to the surface of the spacer 10, and plates 13a and 13b on both sides of the groove 12 have an elastic spring action. ing.

When the rectangular bus bars 1a, 1b are fixedly supported, the clamp members 3a, 3b may be tightened together using the tightening bolts 5 and nuts 6. In this case, since the tightening bolt 5 is inserted through the spacer 10 together with the clamp members 3a and 3b, there is no risk of the spacer 10 being displaced or falling off.

In addition, in the case of sliding fixation in which the rectangular bus bars 1a, 1b are allowed to be displaced relative to the clamp members 3a, 3b according to their thermal expansion and contraction, a spacer 10 is used as shown in FIG. Insert cylindrical collar members 14a, 14b slightly longer than the thickness of the rectangular bus bars 1a, 1b on both sides,
An annular washer 15 is inserted into the groove 12 of the spacer 10 so that the plates 13a and 13b on both sides of the groove 12 do not act as a spring, and the tightening bolt 5 and nut 6 are tightened.
If you tighten the spacer 10 with
a, 1b are sandwiched between the clamp members 3a, 3b without being completely fixed, so the bus bar 1
It becomes possible to slide the clamp members a and 1b relative to the clamp members 3a and 3b. In addition, if the washer 15 is removed in this case, the two plates 13a and 13b on both sides of the groove 12 of the spacer 10 will act as a spring, and the busbar 1
a, 1b can be semi-fixed, busbars 1a, 1b can be fixed to some extent, and rectangular busbars 1a, 1b can also be slid.

Note that the collar members 14a, 14 in FIG.
If b is integrated with the spacer 10 on both sides of the spacer 10 as shown in FIG. 4, construction can be facilitated.

As the material of the spacer 10, copper, aluminum or its alloy, non-magnetic metal such as stainless steel, or metal material such as steel is used, and as the material other than metal, an appropriate synthetic resin plate or the like is used. In addition, when manufacturing the thick spacer 10 using a mold, for example, it is possible to consider a shape that uses the minimum amount of material commensurate with its strength, and in this case, providing ribs increases the strength and reduces the amount of material used. This can be reduced.

As explained above, the busbar supporting clamp unit according to the present invention prevents the spacer from falling off by providing bolt holes in the spacer, and can optionally support the busbar in a fixed manner or slide it. Furthermore, since the groove is provided around the bolt hole, it is also possible to support the bus bar in a semi-fixed manner by utilizing the springiness of this part.

[Brief explanation of the drawing]

Figure 1 is an exploded configuration diagram of a conventional busbar support clamp part, Figure 2 and the following diagrams show a busbar support clamp part according to the present invention, Figure 2 is an exploded configuration diagram thereof, and Figure 3 is a case of slide fixation. A sectional view of the main parts of
FIG. 4 is a perspective view of a main part in which a collar member is integrated with a spacer. 1a and 1b are rectangular bus bars, 3a and 3b are clamp members, 5 is a tightening bolt, 6 is a nut, 1
0 is a spacer, 11 is a bolt hole, 12 is a split groove, 1
3a and 13b are plates, 14a and 14b are collar members, and 15 is a washer.

Claims (1)

[Claims for Utility Model Registration] 1. A clamp unit for tightening bolts from both sides of a plurality of busbars with spacers sandwiched therein by clamp members, wherein the spacer includes a plurality of bolts coaxial with the clamp members for passing through the bolts. A clamp part for supporting a bus bar, characterized in that it has holes, and grooves parallel to the surface are formed in at least a part of the periphery of these bolt holes. 2. The busbar support clamp unit according to claim 1, which is used by inserting a collar member between both sides of the bolt hole of the spacer and both clamp members. 3. The busbar supporting clamp section according to claim 2, wherein the collar member is integrally constructed with a spacer. 4. The busbar supporting clamp section according to claim 2, which is used by inserting a washer into the split groove.