JP5691906B2 - Terminal bracket connection structure - Google Patents

Description

  The present invention relates to a connection structure for a terminal fitting.

  Conventionally, as a connection structure of terminal fittings in which each terminal fitting is fixed in a laminated state by overlapping a plurality of terminal fittings having mounting holes through which bolts are inserted and fastening the bolts together, for example, in Patent Document 1 below The ones described are known. The terminal fitting has a connection plate made of a flat metal plate, and has a shape in which mounting holes are provided in a form that penetrates the connection plate in the thickness direction, and the connection plates are overlapped so that the mounting holes are concentric. Each terminal fitting is connected in a conductive manner by inserting a common bolt into each mounting hole and fastening the bolts together.

Japanese Utility Model Publication No. 7-36371

However, in the above conventional one, if the bolt tightening force is insufficient due to some circumstances, the contact pressure between the terminal fittings that overlap each other becomes insufficient, resulting in poor electrical connection reliability. .
The present invention has been completed based on the above-described circumstances, and an object of the present invention is to ensure electrical connection reliability even when there is a defect in the tightening form of the bolt.

The technology disclosed in this specification is provided with two terminal fittings in which a flat connection plate having a through hole formed continuously is provided on the distal end side of a wire crimping portion to which a terminal of a wire is crimped. The two connection plates are vertically stacked so that the mounting holes are concentric in a rotation posture in which the respective wire crimping portions avoid interference with each other. A terminal metal connection structure in which two terminal fittings are connected to each other by inserting a common bolt and fastening the bolts together, and in either one of the upper and lower terminal fittings, the connection plate After extending from the hole edge toward the center of the mounting hole on both sides of the mounting hole at the center of the mounting hole, a predetermined interval is formed on the surface of the extending portion facing the other terminal fitting. By turning it back A pair of linear rail portions formed by inserting insertion grooves opened on the hole edge side between the return portion and the extending portion are formed in parallel with each other. In the other terminal fitting, the connection plate Corresponding to the both rails when the other terminal fitting is in a normal turning posture when it is overlapped with the one terminal fitting. A pair of insertion plates that protrude toward the center of the mounting hole and that can be inserted from one side in the length direction with respect to the insertion groove of the rail portion in a parallel posture, and An escape groove is formed on the front edge in the insertion direction of the attachment hole of the connection plate so as to avoid interference with the rail part of the one terminal fitting, and the insertion groove in the rail part and The insertion plate On one of opposed surfaces, characterized in it was configured to press-fit projections are formed.

After each terminal fitting is in a predetermined rotation position, the connection plate of the other terminal fitting is positioned on the front side of the other rail part with respect to the connection plate of one terminal fitting. Let them overlap. From this state, while sliding the connection plate of the other terminal fitting on the connection plate of the one terminal fitting, the pair of insertion plates is inserted into the insertion groove of the other rail portion from the front end, and the insertion plate is The insertion operation is stopped when the press-fitting protrusions are pushed in, that is, press-fitted, and the mounting holes of both connection plates are aligned concentrically.
By inserting the insertion plate into the rail, the upper and lower connection plates are securely connected with sufficient contact pressure, and even if there is a problem with bolt tightening, electrical connection between the terminal fittings Reliability is ensured. Since the insertion plate can be press-fitted into the rail part by one-way sliding operation, the connection operation is easy, and the press-fitted part is set at the edge of the mounting hole of the connection plate, avoiding the enlargement of the connection plate it can.

The following configuration may also be used.
(1) said rail section, the connecting plate the mounting hole extending formed strip from the hole edge of the said the other terminal fitting opposed to the side raised above standing stepwise on the opposite side After extending toward the center of the mounting hole in a form, the insertion groove is substantially flush with the connection plate by being folded back at a position protruding from the connection plate to the side facing the other terminal fitting. The insertion plate is formed in a stepped shape on the side facing the one terminal fitting.
Both terminal fittings can be assembled with the connection plate of the other terminal fitting and the folded portion of the rail portion provided on the one terminal fitting in a flush state. For this reason, when the connection plate side of the other terminal fitting is placed on the mating member that is bolt-fastened, it can be placed in a flat contact state with the folded portion of the rail portion, and can be stably fixed.

(2) A groove narrower than a width of the press-fitting protrusion is formed on a surface of the rail portion facing the insertion groove and a surface provided with the press-fitting protrusion among surfaces facing the insertion plate. A guide groove having a width is formed along the insertion direction of the insertion plate.
The insertion plate fits into the insertion groove of the rail part, while the press-fitting protrusion fits into the opening side of the guide groove, crushing the corners of both opening side edges of the guide groove and the press-fitting protrusion enters along the guide groove. Inserted. By being guided by the guide groove, the insertion operation of the insertion plate can be performed smoothly.

  (3) A stopper mechanism for stopping the insertion plate by abutting the press-fitting protrusion is provided at a front position in the insertion direction of the insertion plate in the guide groove. Positioning in the sliding direction when assembling the terminal fitting can be performed reliably.

  According to the present invention, it is possible to ensure electrical connection reliability between the terminal fittings even when there is a problem in tightening the bolt.

The top view of the 1st earthing terminal concerning Embodiment 1 of the present invention II-II enlarged end view of Fig. 1 Top view of the second ground terminal IV-IV enlarged end view of Fig. 3 Plan view with both ground terminals assembled Enlarged end view of VI-VI line in Fig. 5 Sectional view taken along line VII-VII in FIG. Sectional drawing of the state by which the insertion board which concerns on Embodiment 2 was inserted in the rail part

<Embodiment 1>
A first embodiment of the present invention will be described with reference to FIGS. In this embodiment, a combination ground terminal is illustrated.
The combined ground terminal of the present embodiment includes two ground terminals 10A and 10B having substantially the same outer shape, and the ground terminals 10A and 10B are vertically assembled and integrally assembled by a sliding method. 7, the assembled ground terminals 10 </ b> A and 10 </ b> B are placed at predetermined positions on the thick plate-like mounting base 40, and are fastened and fixed together by bolts 45 and nuts 46. It has become. A bolt insertion hole 41 through which the bolt 45 is inserted is opened in the mounting base 40, and a nut 46 is fixed to the back side of the bolt insertion hole 41 by welding or the like.

  Both ground terminals 10A and 10B are formed by punching a metal flat plate having excellent conductivity such as brass into a predetermined shape and bending it. As a shape common to both the ground terminals 10A and 10B, a connection plate 13A in which mounting holes 12A and 12B through which bolts 45 can be inserted are formed on the distal end side of a wire crimping portion 11 to which a terminal of a wire (not shown) is crimped. , 13B are formed in a row.

The shape of each ground terminal 10A, 10B will be further described. Hereinafter, the ground terminal 10A positioned on the upper side will be described as the first ground terminal 10A, and the ground terminal 10B positioned on the lower side will be described as the second ground terminal 10B.
In the first ground terminal 10A, as shown in FIG. 1 and FIG. 2, a pair of linear rails are provided at the hole edges on both sides of the center line A of the first ground terminal 10A in the mounting hole 12A of the connection plate 13A. The parts 20 are formed in a mutually parallel posture.

  Specifically, the rail portion 20 is formed with a strip 20A having a predetermined width extending from the edge of the attachment hole 12A of the connection plate 13A, and the strip 20A is stepped by a dimension slightly larger than the thickness of the strip 20A. After extending toward the center of the mounting hole 12A in a form rising to the upper surface side (extension portion 21), at a position protruding downward from the lower surface of the connection plate 13A by the thickness of the connection plate 13A The shape of the extended portion 21 is folded back to a position on the near side of the predetermined dimension of the rising portion 22 (folded portion 23). As a result, the insertion groove 25 opened to the hole edge side is formed between the folded portion 23 and the extending portion 21 so as to be substantially flush with the connecting plate 13A. In addition, a predetermined gap 26 is secured between the tip of the folded portion 23 and the rising portion 22 of the extending portion 21.

  A press-fitting ridge 28 having a semicircular cross section strikes the entire length of the lower surface of the insertion groove 25 formed in the rail portion 20, that is, at the substantially central position in the width direction on the upper surface of the folded portion 23 from the lower surface side. It is put out and formed.

On the other hand, in the second ground terminal 10B, as shown in FIGS. 3 and 4, a rail portion 20 formed in the first ground terminal 10A, as will be described in detail later, at the hole edge of the mounting hole 12B of the connection plate 13B. A pair of insertion plates 30 that can be inserted from the end on the front side with respect to the insertion groove 25 are formed in a parallel posture.
The formation positions of both insertion plates 30 are as follows. When the ground terminals 10A and 10B are overlapped, the center lines A and B are overlapped so as to intersect with each other at a predetermined angle α so that the wire crimping portion 11 does not interfere. It has become. The insertion plate 30 is arranged so that the insertion plate 30 on the second ground terminal 10B side is aligned with the pair of rail portions 20 on the first ground terminal 10A side when stacked in such a predetermined rotation posture. The formation position is set.

Therefore, in the second ground terminal 10B, as shown in FIG. 3, the pair of insertion plates 30 described above are formed at the hole edges on both sides sandwiching the line b intersecting with the center line B of the second ground terminal 10B at an angle α. Is formed.
As shown in FIG. 4, the insertion plate 30 is formed to protrude toward the center of the mounting hole 12 </ b> B in a stepped shape with a dimension slightly larger than the thickness of the connection plate 13 </ b> B toward the upper surface side. 20 has approximately the same length dimension.

  Further, in the front edge portion of the attachment hole 12B of the connection plate 13B, a relief groove 33 for avoiding interference with the rail portion 20 of the first ground terminal 10A is opened forward during the assembly operation described later. It is formed with.

The present embodiment has the above-described structure, and the two ground terminals 10A and 10B are assembled as follows.
After the second ground terminal 10B is pivoted at an angle α with respect to the first ground terminal 10A, the connection plate 13B of the second ground terminal 10B is the lower surface of the connection plate 13A of the first ground terminal 10A. On the other hand, the insertion plate 30 is overlaid in a state of being positioned in front of the rail portion 20. From this state, when the connection plate 13B of the second ground terminal 10B is slid forward on the lower surface of the connection plate 13A of the first ground terminal 10A, the rail portion 20 fits into the escape groove 33 and interference is avoided. The insertion plate 30 is inserted from the front end with respect to the insertion groove 25 of the other rail portion 20 while passing each rising portion 31 through the gap 26.

The insertion plate 30 is pushed in, that is, press-fitted while crushing the press-fitting ridge 28, and the insertion operation is stopped when the mounting holes 12A and 12B of both the connection plates 13A and 13B are aligned concentrically as shown in FIG.
As a result, the assembly of both the ground terminals 10A and 10B is completed, and as shown in FIG. 6, the pair of insertion plates 30 are press-fitted into the mating rail portion 20, thereby connecting the connection plates 13A of both the ground terminals 10A and 10B. , 13B are connected with sufficient contact pressure.

As shown in FIG. 7, the combined ground terminal assembled in this way is placed at a predetermined position on the mounting base 40, and the mounting holes 12 </ b> A and 12 </ b> B aligned with both ground terminals 10 </ b> A and 10 </ b> B are bolt insertion holes 41. The shaft portion 45B of the bolt 45 is inserted from the mounting holes 12A, 12B of the ground terminals 10A, 10B to the bolt insertion hole 41 and screwed into the nut 46, and the bolt 45 is screwed into the bolt. Both ground terminals 10 </ b> A and 10 </ b> B are collectively fixed to the mounting base 40 while the head 45 </ b> A of 45 holds the rail portion 20.
Here, for example, when an electric wire drawn out from either one of the ground terminals 10A or 10B is connected to the ground part, the other ground terminal 10B or 10A side connected to the ground part is grounded.

  In the above, the fastening operation by the bolt 45 and the nut 46 is to fix both the ground terminals 10A and 10B at a predetermined position on the mounting base 40 and to firmly connect both the connection plates 13A and 13B of the both ground terminals 10A and 10B. It functions to press and connect to each other, but if the bolt 45 is not sufficiently tightened for some reason in the form in which the press-fitting portion of the insertion plate 30 to the rail portion 20 is not provided, There is a possibility that the contact pressure between the connection plates 13A and 13B of the ground terminals 10A and 10B is insufficient.

  On the other hand, in this embodiment, since the insertion plate 30 is press-fitted into the mating rail portion 20, the connection plates 13A and 13B of both the ground terminals 10A and 10B are connected with sufficient contact pressure. Therefore, even if there is a problem in the tightening mode of the bolt 45, it is possible to ensure the reliability of electrical connection between the ground terminals 10A and 10B.

  In the present embodiment, the insertion plate 30 provided on the second ground terminal 10B can be press-fitted into the rail portion 20 of the first ground terminal 10A by a one-way sliding operation, so that the assembling work is simple. Further, since the rail portion 20 and the insertion plate 30 are set at the hole edges of the attachment holes 12A and 12B of the connection plates 13A and 13B, the connection plates 13A and 13B can be prevented from being enlarged, and thus placed on the attachment base 40. Space can be kept small.

  Further, in the present embodiment, as shown in FIG. 7, both ground terminals 10A and 10B are connected to the connection plate 13B of the second ground terminal 10B on the lower side and the folded portion of the rail portion 20 provided on the first ground terminal 10A. 23 is assembled in a flush state, so that when the connection plate 13B side of the second ground terminal 10B on the lower side is mounted on the mounting base 40 that is bolt-fastened, the contact state that the back portion 23 of the rail portion 20 is also covered And can be fixed stably.

<Embodiment 2>
FIG. 8 shows a second embodiment of the present invention. In the second embodiment, of the insertion plate 30B formed on the second ground terminal 10B, the folded portion 23 is formed on the lower surface of the insertion groove 25 formed on the counterpart rail portion 20, that is, the lower surface facing the upper surface of the folded portion 23. A guide groove 35 having a groove width narrower than the width of the press-fitting protrusion 28 formed on the upper surface of the insertion plate 30B is formed over the entire length along the insertion direction of the insertion plate 30B.

  In the second embodiment, when the insertion plate 30B is inserted into the insertion groove 25 of the mating rail portion 20, the press-fitting ridges 28 are fitted into the opening side of the guide groove 35, and the corners of the both opening side edges of the guide groove 35 are inserted. The insertion plate 30 </ b> B is inserted into the insertion groove 25 while the press-fitting ridge 28 enters along the guide groove 35 while crushing the portion. By inserting the pair of insertion plates 30B into the mating rail portion 20, the connection plates 13A and 13B of the ground terminals 10A and 10B are connected with sufficient contact pressure, and in addition, the guide grooves 35 By being guided, the insertion operation of the insertion plate 30B can be performed more smoothly.

  In the second embodiment, when the press-fitting ridge 28 and the guide groove 35 are formed in a shape in which the front edge in the insertion direction stays at a position that is a predetermined dimension before the front edge of the rail portion 20 and the insertion plate 30B. When the insertion plate 30B is inserted into the rail portion 20 and inserted to the normal position, the insertion is stopped when the front edge of the press-fitting protrusion 28 hits the end surface on the front edge side of the guide groove 35 serving as a stopper mechanism. To function. That is, when both the ground terminals 10A and 10B are assembled by a sliding operation, the positioning in the sliding direction can be reliably performed, that is, both the mounting holes 12A and 12B can be surely aligned concentrically.

<Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention.
(1) Instead of forming the press-fitting ridges exemplified in the above embodiment, for example, a plurality of hemispherical press-fitting protrusions may be formed at intervals along the insertion direction.
(2) In the above embodiment, the relief groove formed in the connection plate of the second ground terminal is opened at the outer edge, but depending on conditions such as the length of the rail portion provided in the first ground terminal in the insertion direction, etc. The escape groove provided in the connection plate of the second ground terminal can be shaped such that only the inner peripheral side of the hole edge on the front side of the mounting hole is cut away and the outer peripheral side is left.

( 4) Contrary to the above embodiment, a rail portion may be provided on the second ground terminal located on the lower side, and an insertion plate may be provided on the first ground terminal located on the upper side.
(5) The press-fitting protrusion may be provided on the insertion plate side. Accordingly, in the second embodiment, the guide groove is provided on the insertion groove side of the rail portion.

(6) As a form for fixing the combination ground terminal to the mounting base, a form in which a stat bolt is set up on the mounting base, a mounting hole of the combination ground terminal is inserted, and a nut is screwed into the stud bolt and tightened may be employed.
(7) In the above embodiment, the ground terminal is exemplified as the terminal fitting. However, the terminal fitting may be used for other purposes as long as it is a terminal fitting connected to each other by bolting together, for example, for signal connection. You may apply to a terminal metal fitting.

10A: First ground terminal (one terminal fitting)
10B ... Second ground terminal (the other terminal fitting)
DESCRIPTION OF SYMBOLS 11 ... Wire crimping part 12A, 12B ... Mounting hole 13A, 13B ... Connection board 20 ... Rail part 20A ... Strip 21 ... Extension part 23 ... Folding part 25 ... Insertion groove 28 ... Press fitting protrusion (press fitting protrusion)
30, 30B ... Insertion plate 33 ... Relief groove 35 ... Guide groove 40 ... Mounting base 41 ... Bolt insertion hole 45 ... Bolt 46 ... Nut

Claims (3)

Two terminal fittings, each having a flat connecting plate formed through the mounting hole, are provided on the distal end side of the electric wire crimping portion to which the end of the electric wire is crimped. The connecting plates are stacked one above the other so that the mounting holes are concentric in a rotating posture that avoids interference with the wire crimping part, and a common bolt is inserted through the mounting holes in a lump. A terminal fitting connection structure in which the two terminal fittings are connected to each other by bolt fastening,
In either one of the upper and lower terminal fittings, after extending from the hole edge toward the center of the mounting hole to the hole edge on both sides sandwiching the center of the mounting hole of the connection plate, the other of the extension part A pair of linear rail parts in which an insertion groove opened on the edge side of the hole is formed between the folded part and the extension part by being folded back at a predetermined interval on the side facing the terminal fitting Are formed parallel to each other,
The other terminal fitting is a hole edge on both sides sandwiching the center of the attachment hole of the connection plate, and assumes a normal rotation posture when the other terminal fitting is overlapped with the one terminal fitting. A pair of insertion plates that protrude toward the center of the mounting hole and can be inserted from one side in the length direction with respect to the insertion groove of the rail portion. With a parallel posture,
An escape groove is formed on the front edge in the insertion direction of the attachment hole of the connection plate to avoid interference with the rail portion of the one terminal fitting,
In addition, a press-fitting protrusion is formed on one of the insertion groove in the rail portion and the surface facing the insertion plate ,
The rail portion has a strip formed extending from a hole edge of the attachment hole of the connection plate in a form rising in a step shape on the side opposite to the side facing the other terminal fitting. After extending toward the center, the insertion groove is formed so as to be substantially flush with the connection plate by folding back at a position protruding from the connection plate to the side facing the other terminal fitting. As well as
The insertion structure of the terminal fitting, wherein the insertion plate is formed in a stepped shape on the side facing the one terminal fitting . Of the surfaces facing the insertion groove and the insertion plate in the rail portion, the surface facing the surface provided with the press-fitting projection has a groove width narrower than the width of the press-fitting projection. connecting structure of the terminal fitting of claim 1 in which the guide groove, characterized in that it is formed along the insertion direction of the insertion plate. The terminal according to claim 2, wherein a stopper mechanism that stops the insertion plate by abutting the press-fitting protrusion is provided at a front position in the insertion direction of the insertion plate in the guide groove. Bracket connection structure.

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