JP2013239310A - Connector insulation cover and switch - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a connector insulation cover and a switch, capable of securing insulation while abolishing an insulation barrier of a common bus connector.SOLUTION: A connector insulation cover 60 is attached to a common bus connector 30 to which a common bus 32 connecting between the same phases of a multi-circuit switch and a power supply side upper connection terminal 31 are connected. The connector insulation cover 60 comprises: a cylindrical bus coating part 61 consisting of an elastic insulation material; a notched part 62 formed to a lower surface of the bus coating part 61 over a cylindrical axial direction; and a fitting part 63 having a fitting hole to which an end part of the upper connection terminal 31 is fitted at the center of a lower surface of the bus coating part 61. Thus, insulation can be secured while abolishing an insulation barrier of the common bus connector 30.

Description

  The present invention relates to a connection insulating cover and a switch for insulating a common bus bar of a multi-circuit switch.

  In the multi-circuit switch, a circuit opening / closing section including a fixed electrode and a movable electrode that is energized by being brought into contact with the fixed electrode is arranged for each circuit in the case. The fixed electrode and the movable electrode are connected to connection terminals, respectively. The same phase is connected to the connection terminal on the power source side by the same common bus for each phase. Further, the connection terminals on the load side are respectively connected to bushings that penetrate the case through connection conductors (see, for example, Patent Document 1).

  In the multi-circuit switch described in Patent Document 1, the electrode is exposed at the common bus connecting portion between the connection terminal on the power source side and the common bus, and the electrode is exposed at the bushing connecting portion between the inner end of the bushing and the connecting conductor. Exposed.

JP 2007-234377 A

  By the way, in the multi-circuit switch described in Patent Document 1, it is necessary to ensure insulation between different phases and between the ground at the common bus connection portion between the connection terminal on the power source side and the common bus. Therefore, in this multi-circuit switch, a box-shaped insulating barrier is attached so as to surround the circuit switching part. In addition, in order to ensure insulation between the different phases, an insulation barrier is also provided between the different phases of the common busbar connection portion.

  However, connection insulation covers and switches that can ensure insulation while eliminating insulation barriers for common bus connection parts due to requests such as downsizing of switches, reduction of number of parts, improvement of installation workability, reduction of work man-hours, etc. Is required.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a connection portion insulating cover and a switch that can ensure insulation while eliminating the insulation barrier of the common busbar connection portion.

Hereinafter, means for achieving the above-described object and its operation and effects will be described.
The invention according to claim 1 is a connecting portion insulating cover attached to a common bus connecting portion to which a common bus connecting the same phase of the multi-circuit switch and a connecting terminal on the power source side are connected, and is cylindrical. A bus cover portion, a notch formed in the lower surface of the bus cover portion in the axial direction, and a fitting hole into which the end of the connection terminal fits in the center of the lower surface of the bus cover portion. The gist is to provide a fitting portion.

  According to this configuration, the upper surface and the side surface of the common bus are covered by the bus bar covering portion by expanding the cut portion of the bus bar covering portion and mounting the cut portion on the common bus bar connecting portion. For this reason, the upper surface and side surface of the common busbar connection portion, that is, insulation between different phases can be ensured. And since the fitting part of the connection part insulation cover with which the common bus-line connection part was mounted | worn fits the edge part of a connection terminal, the edge part of a connection terminal is covered. For this reason, the insulation of the lower part of a common bus-line connection part, ie, ground, is securable. Therefore, since the insulation barrier of the common bus connection part can be eliminated, the switch can be downsized and the number of parts can be reduced.

  According to a second aspect of the present invention, in the connection portion insulating cover according to the first aspect, on both side surfaces in the axial direction of the fitting portion, pedestal portions that are installed on support members that support the connection terminals are provided. That is the gist.

  According to this configuration, when the connecting portion insulating cover is mounted on the common busbar connecting portion, the pedestal portion is installed on the support member that supports the connecting terminal, so that the end of the connecting terminal is reliably covered and insulated. Can be secured.

  According to a third aspect of the present invention, in the connection portion insulating cover according to the first or second aspect, a storage portion for storing a fixing member for fixing the common busbar to the connection terminal is provided on the upper surface of the busbar covering portion. The gist is to prepare.

According to this configuration, since the housing portion for the fixing member such as a bolt is provided on the upper surface of the busbar covering portion, the common busbar connecting portion including the fixing member such as the bolt can be reliably covered to ensure insulation.
According to a fourth aspect of the present invention, in the connection portion insulating cover according to any one of the first to third aspects, the busbar covering portion attached to an end portion of the common busbar closes the end portion side. The gist is to provide a closing portion.

According to this configuration, since the closing portion is provided on the end portion side of the busbar covering portion at the end portion of the common busbar, the end portion of the common busbar can be covered and insulation can be ensured.
According to a fifth aspect of the present invention, the connecting portion insulating cover according to any one of the first to fourth aspects is attached to a common busbar connection portion to which the common busbar and the connection terminal are connected. This is the gist.

  According to this configuration, insulation between different phases and ground can be ensured in the common bus bar connection portion where the common bus bar and the connection terminal are connected. Therefore, since the insulation barrier of the common bus connection part can be eliminated, the switch can be downsized and the number of parts can be reduced.

  According to the present invention, it is possible to secure insulation while eliminating the insulation barrier of the common busbar connection portion by the connection portion insulating cover.

The front view which shows schematic structure of a multicircuit switch. 2-2 sectional drawing which shows schematic structure of a multicircuit switch. The perspective view which shows the state which attached the connection part insulation cover for intermediate parts to the common bus-line connection part. The top view which shows the shape of the connection part insulation cover for intermediate parts. 5-5 sectional drawing which shows the shape of the connection part insulation cover for intermediate parts. 6-6 sectional drawing which shows the shape of the connection part insulation cover for intermediate parts. The perspective view which shows the state which attached the connection part insulation cover for ends to the common bus-line connection part. The top view which shows the shape of the connection part insulation cover for edge parts. 9-9 sectional drawing which shows the shape of the connection part insulation cover for edge parts. 1-1 is a diagram illustrating a shape of a connection portion insulating cover for an end portion. The rear view which shows the shape of the connection part insulation cover for edge parts.

Hereinafter, an embodiment in which a connection part insulating cover according to the present invention is mounted on a multi-circuit switch will be described with reference to FIGS.
As shown in FIGS. 1 and 2, in the multi-circuit switch, circuit open / close portions 11 for five circuits are arranged in the case 10 in parallel. The circuit opening / closing part 11 is installed in the vertical direction, and is provided with a fixed electrode 12 and a movable electrode 13 that is energized when brought into contact with the fixed electrode 12. That is, the fixed electrode 12 is installed on the lower side, and the movable electrode 13 is installed on the upper side.

  The fixed electrode 12 is a part of the lower connection terminal 21. Each lower connection terminal 21 is connected to the inner end of a resin bushing 22 that penetrates the case 10 via a metal connection conductor 23. A conductive member is provided inside the bushing 22. The connection conductor 23 is a bent plate. A connection conductor 23 is fixed to the inner end of the bushing 22 by a bolt 24 as a fixing member. A connection portion between the inner end of the bushing 22 and the connection conductor 23 is referred to as a bushing connection portion 20. Since the current-carrying portion of the bushing connection portion 20 is exposed, a bushing connection portion insulating cover 40 formed of an elastic insulating material is attached to the bushing connection portion 20.

  The base end of the movable electrode 13 is rotatably connected to the upper connection terminal 31. Each upper connection terminal 31 is supported through the support member 34, and the tip of the rectangular column of the upper connection terminal 31 protrudes from the upper surface of the support member 34. The same phase is connected to the tip of each upper connection terminal 31 by the same common bus 32 for each phase. The common bus bar 32 is a rod-shaped conductive metal material. A connection portion between the upper connection terminal 31 and the common bus 32 is referred to as a common bus connection 30. Since the current-carrying portion is exposed in the common busbar connection portion 30, a connection portion insulating cover 60 formed of an elastic insulating material is attached to the common busbar connection portion 30. Note that there are two types of connecting portion insulating cover 60, one for the intermediate portion used by the common bus 32 for the intermediate connecting portion and the other for the end portion used for the connecting portion at the end of the common bus 32.

  As shown in FIGS. 3 and 7, the common bus bar 32 is provided with an insulating shrinkable tube 35 except for the connection portion to which the upper connection terminal 31 is connected. Connection holes 32 a for connection are formed at positions corresponding to the upper connection terminals 31 of the common bus 32. A threaded portion 33 a of a bolt 33 is inserted into the connection hole 32 a of the common bus 32, and the common bus 32 is fixed to the end of the upper connection terminal 31 by a bolt 33 as a fixing member.

  As shown in FIG. 3, the connection insulating cover 60 for the intermediate portion includes a common busbar at the tip of the upper connection terminal 31, an exposed connection portion in the middle of the common busbar 32, and the tip of the upper connection terminal 31. The bolt 33 which fixes 32 is covered. For this reason, the current-carrying part exposed in the middle of the common bus 32 is covered with the connection part insulating cover 60.

  The intermediate portion connecting portion insulating cover 60 includes a square tube-shaped bus bar covering portion 61 and a notch 62 formed on the lower surface of the bus bar covering portion 61 over the entire length in the cylinder axis direction (longitudinal direction). Yes. The bus bar covering portion 61 is formed with an upper insulating portion 61a at the upper portion, side insulating portions 61b and 61c at the left and right side portions, and lower insulating portions 61d and 61e at the lower portion. The bus bar covering portion 61 covers the middle energizing portion of the common bus bar 32 with the upper insulating portion 61a and the side insulating portions 61b and 61c, and the lower insulating portions 61d and 61e wrap around the lower surface of the common bus bar 32. ing. Each end portion of the contraction tube 35 of the common bus bar 32 is located in the bus bar covering portion 61. The bus bar covering part 61 can be expanded by the notch part 62, and is attached to the common bus bar 32 by expanding the notch part 62.

  As shown in FIGS. 4 to 6, the connecting part insulating cover 60 for the intermediate part has a fitting hole 63 a into which the tip of the upper connecting terminal 31 is fitted in the center of the lower surface of the bus bar covering part 61. A portion 63 is provided. The fitting hole 63a of the fitting portion 63 is formed in the same quadrangular shape corresponding to the upper connection terminal 31 of the square pillar. The fitting portion 63 covers the outer peripheral surface of the tip portion of the upper connection terminal 31. The opening portion of the fitting hole 63a of the fitting portion 63 has a tapered surface so that the upper connection terminal 31 can be easily attached. The bus bar covering portion 61 is opened by the cut portion 62.

  In addition, on both side surfaces of the fitting portion 63 in the cylinder axis direction (longitudinal direction), pedestal portions 64 that are in contact with the upper surface of the support member 34 are provided. The pedestal part 64 is formed to extend to the side of the fitting part 63, that is, to the side of the lower part of the bus bar covering part 61, and is formed with a width up to both ends of the upper surface of the support member 34.

  On the upper surface of the busbar covering portion 61, there is provided a storage portion 65 for storing a bolt 33 as a fixing member for fixing the upper connection terminal 31 to the common busbar 32. The storage portion 65 is formed with a cylindrical space that protrudes upward with the bolt 33 positioned above the common bus bar 32 and stores the bolt 33.

  As shown in FIG. 7, the connection insulating cover 60 for the end is common to the tip of the upper connection terminal 31, the exposed connection of the end of the common bus 32, and the tip of the upper connection terminal 31. The bolt 33 which fixes the bus-bar 32 is covered.

The connecting portion insulating cover 60 for the end portion is different from that for the intermediate portion in that a closing portion 66 is provided.
Similarly to the intermediate portion, the end portion connecting portion insulating cover 60 has a rectangular tube-shaped bus bar covering portion 61 and a notch formed on the lower surface of the bus bar covering portion 61 in the cylinder axis direction (longitudinal direction). A closing portion 66 that closes the opening of the busbar covering portion 61 to cover the end portion of the portion 62 and the common busbar 32 is provided. The bus bar covering portion 61 covers the current-carrying portion at the end of the common bus bar 32 with the upper insulating portion 61a and the side insulating portions 61b and 61c, and the lower insulating portions 61d and 61e wrap around the lower surface of the common bus bar 32. ing. Further, the end portion side of the common bus bar 32 is completely covered by the closing portion 66. Each end portion of the contraction tube 35 at both ends of the common bus bar 32 is located in the bus bar covering portion 61. The bus bar covering part 61 can be expanded by the notch part 62, and is attached to the common bus bar 32 by expanding the notch part 62. The bus bar covering portion 61 is opened by the cut portion 62.

  As shown in FIG. 8 to FIG. 11, the connecting part insulating cover 60 for the end portion is fitted with the front end portion of the upper connecting terminal 31 fitted in the center of the lower surface of the bus cover portion 61, as in the intermediate portion. The fitting part 63 which has the joint hole 63a is provided. Further, on both side surfaces of the fitting portion 63 in the cylinder axis direction (longitudinal direction), a pedestal portion 64 is provided that is installed on the support member 34 that supports the upper connection terminal 31.

  The fitting portion 63 covers the outer peripheral surface of the tip portion of the upper connection terminal 31. On the upper surface of the busbar covering portion 61, there is provided a storage portion 65 for storing a bolt 33 as a fixing member for fixing the upper connection terminal 31 to the common busbar 32.

Next, a method of mounting the connection portion insulating cover 60 on the common busbar connection portion 30 to which the upper connection terminal 31 and the common busbar 32 are connected will be described.
As shown in FIG. 1, a common bus 32 is fixed to the upper connection terminal 31 at the tip by a bolt 33. That is, the common bus 32 is aligned with the upper connection terminals 31 of the same phase, and the screw portions 33a of the bolts 33 are inserted into the connection holes 32a of the common bus 32 and tightened, whereby the common bus 32 is connected to the upper connection terminals. Fix to 31.

  Subsequently, as shown in FIG. 3, the connecting portion insulating cover 60 for the intermediate portion is attached to the common bus connecting portion 30 in which the upper connecting terminal 31 is connected to the intermediate portion of the common bus 32. That is, using the notch 62 of the bus bar covering part 61, the lower part of the bus bar covering part 61 is expanded laterally in the cylinder axis direction, and the bus bar covering part 61 is covered on the intermediate part of the common bus bar 32. The expansion of the cut portion 62 of 61 is returned to the original, and the lower portion of the bus bar covering portion 61 is made to wrap around the lower portion of the common bus bar 32. Then, the bus bar covering portion 61 is in close contact with the outer peripheral surface of the common bus bar 32, and the fitting hole 63 a of the fitting portion 63 is in close contact with the outer peripheral surface of the upper connection terminal 31. In addition, the pedestal portion 64 is in close contact with the upper surface of the support member 34.

  Subsequently, as shown in FIG. 7, the end portion connection portion insulating cover 60 is mounted on the common busbar connection portion 30 in which the upper connection terminal 31 is connected to the end portion of the common busbar 32. That is, using the notch portion 62 of the bus bar covering portion 61, only the side opposite to the closing portion 66 of the lower portion of the bus bar covering portion 61 is expanded sideways in the cylinder axis direction, and the bus bar covering portion 61 is connected to the common bus bar 32. Covering the end portion, the expansion of the notch 62 of the bus bar covering portion 61 is restored and the lower portion of the bus bar covering portion 61 is made to wrap around the lower portion of the common bus bar 32. Then, the bus bar covering portion 61 is in close contact with the outer peripheral surface of the common bus bar 32, and the fitting hole 63 a of the fitting portion 63 is in close contact with the outer peripheral surface of the upper connection terminal 31. In addition, the pedestal portion 64 is in close contact with the upper surface of the support member 34.

  Therefore, as shown in FIG. 3 and FIG. 7, since the common bus connection portion 30 is covered in all directions by the intermediate portion and end portion connection portion insulating covers 60, the common bus connection portion 30 is insulated. Insulation can be secured without using a barrier. That is, since the upper surface of the common bus connection part 30 is covered with the upper insulating part 61a and the storage part 65 of the bus bar covering part 61 of the connection part insulating cover 60, insulation can be ensured. Further, since the side surface of the common bus connection portion 30 is covered with the side insulating portions 61b and 61c of the bus cover portion 61, insulation can be ensured. Further, since the lower surface of the common bus bar connecting portion 30 is covered with the lower insulating portions 61d and 61e of the bus bar covering portion 61, insulation can be ensured. Further, since the end portion of the upper connection terminal 31 is covered with the fitting portion 63 and the pedestal portion 64, insulation can be ensured.

As described above, according to the embodiment described above, the following effects can be obtained.
(1) A cylindrical bus bar covering part 61, a notch 62 formed on the lower surface of the bus bar covering part 61 in the axial direction, and an end of the upper connection terminal 31 at the center of the lower surface of the bus bar covering part 61 And a fitting portion 63 having a fitting hole 63a to be fitted. For this reason, the upper surface and side surface of the common busbar connection part 30, that is, insulation between different phases can be ensured. And since the fitting part 63 of the connection part insulation cover 60 with which the common bus-line connection part 30 was mounted | worn fits the edge part of the upper side connection terminal 31, the edge part of the upper side connection terminal 31 is covered. For this reason, the insulation of the lower part of the common bus-line connection part 30, ie, the ground, is securable. Therefore, since the insulation barrier of the common bus connection part 30 can be abolished, it is possible to reduce the size of the switch and the number of parts.

  (2) Since the pedestal 64 is installed on the support member 34 that supports the upper connection terminal 31 when the connection insulating cover 60 is attached to the common bus connection 30, the end of the upper connection terminal 31 is securely Covered to ensure insulation.

(3) Since the housing part 65 is provided on the upper surface of the bus bar covering part 61, the common bus bar connecting part 30 including the bolt 33 can be reliably covered to ensure insulation.
(4) Since the end portion of the common bus bar 32 is provided with the closing portion 66 on the end side of the bus bar covering portion 61, the end portion of the common bus bar 32 can be covered to ensure insulation.

In addition, the said embodiment can be implemented with the following forms which changed this suitably.
In the above configuration, the length of the busbar covering portion 61 in the cylinder axis direction can be arbitrarily changed within a range where insulation is maintained.

-In the said structure, the extension amount from the bus-line coating | coated part 61 of the base part 64 can be changed arbitrarily.
In the above embodiment, a gap is provided in the notch 62 of the bus bar covering portion 61. However, the width of the gap can be arbitrarily changed as long as insulation is maintained, and the gap may be minimized.

  -In above-mentioned embodiment, although the accommodating part 65 was provided in the upper surface of the bus-line coating | coated part 61, if the volt | bolt 33 can be accommodated by expansion | extension of the connection part insulation cover 60, even if the structure which abbreviate | omitted the accommodating part 65 is employ | adopted. Good.

  In the above embodiment, the pedestal portion 64 is provided. However, if the fitting portion 63 is sufficient, a configuration in which the pedestal portion 64 is omitted may be employed.

  DESCRIPTION OF SYMBOLS 10 ... Case, 11 ... Circuit opening / closing part, 12 ... Fixed electrode, 13 ... Movable electrode, 20 ... Bushing connection part, 21 ... Lower side connection terminal, 22 ... Bushing, 23 ... Connection conductor, 23a ... Connection hole, 24 ... Bolt 24a ... Screw part, 30 ... Common bus bar connection part, 31 ... Upper connection terminal, 32 ... Common bus bar, 32a ... Connection hole, 33 ... Bolt, 33a ... Screw part, 34 ... Support member, 35 ... Shrink tube, 40 ... Bushing connection part insulation cover, 60 ... Connection part insulation cover, 61 ... Busbar covering part, 61a ... Upper insulation part, 61b, 61c ... Side part insulation part, 61d, 61e ... Lower insulation part, 62 ... Notch part, 63 ... Fitting part, 63a ... fitting hole, 64 ... pedestal part, 65 ... storage part, 66 ... closing part.

Claims (5)

A connecting part insulating cover attached to a common bus connecting part to which a common bus connecting the same phase of the multi-circuit switch and a connection terminal on the power source side are connected,
A cylindrical busbar cover,
A notch formed on the lower surface of the busbar covering portion in the axial direction;
A connecting portion insulating cover, comprising: a fitting portion having a fitting hole into which an end portion of the connection terminal is fitted in the center of the lower surface of the bus bar covering portion. In the connection part insulation cover of Claim 1,
A connection part insulating cover, comprising a base part installed on a support member that supports the connection terminal on both side surfaces in the axial direction of the fitting part. In the connection part insulation cover of Claim 1 or 2,
A connecting portion insulating cover, comprising an accommodating portion for accommodating a fixing member for fixing the common bus bar to the connection terminal on an upper surface of the bus bar covering portion. In the connection part insulation cover as described in any one of Claims 1-3,
The connecting portion insulating cover, wherein the bus cover portion attached to an end portion of the common bus bar includes a closing portion that closes the end side. The switch characterized by mounting the connection part insulation cover as described in any one of Claims 1-4 to the common bus line connection part to which the said common bus line and the said connection terminal are connected.

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