JP5472747B2 - 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 a plurality of terminal fittings having mounting holes through which bolts are inserted are laminated and bolted together to fix each terminal fitting in a laminated state, for example, in Patent Document 1 below The ones described are known. This terminal metal fitting has a connection portion made of a metal flat plate, and is provided with a mounting hole in a form penetrating in the thickness direction of the connection portion. Each connection part is arranged in a stacked state so that the mounting holes are coaxial, and a common bolt is inserted into these mounting holes and the bolts are fastened together, so that each terminal fitting is connected in a conductive state, and in a stacked state It is fixed to.

JP-A-8-236184

  However, when the bolt forgetting to tighten is generated in the above configuration, the contact between the terminal fittings overlapping in the stacking direction becomes insufficient, and the electrical connection reliability may be lowered.

  The present invention has been completed based on the above circumstances, and an object of the present invention is to provide a terminal fitting connection structure that can provide sufficient connection reliability even when a bolt is forgotten to be tightened.

  The present invention relates to a terminal fitting configured to include a connection portion in which a mounting hole is provided in a form penetrating a metal flat plate, in which a plurality of connection portions are stacked so that the mounting holes are coaxial, A terminal fitting connection structure in which a plurality of terminal fittings are connected to each other by inserting a common bolt into the bolt and tightening the bolts together, and is connected to one of the two connecting portions overlapping in the stacking direction. A connecting portion is provided, and on the other side, a connected portion that holds the two connecting portions in a stacked state by being locked in the stacking direction with the connecting portion is provided. It is characterized in that the outer edge of the coupled portion is provided with a resilient contact surface that elastically contacts in the direction intersecting the stacking direction by relatively rotating the connecting portions of the sheets.

  According to such a configuration, a plurality of connection portions are stacked so that the mounting holes are coaxial, and two of the connection portions overlapping in the stacking direction are relatively rotated to thereby connect the connecting portion and the connected portion. Are locked in the stacking direction, and the two connecting portions are held in the stacked state. At the same time, since the outer edge of the connected portion elastically contacts the elastic contact surface of the connecting portion from the direction intersecting the stacking direction, the two connecting portions can be electrically connected. Therefore, sufficient connection reliability can be obtained without tightening the bolts.

The following configuration is preferable as an embodiment of the present invention.
The two connecting portions that overlap in the stacking direction are prevented from rotating together when the connecting portion of one connecting portion and the connecting portion of the other connecting portion contact each other in the rotation direction around the attachment hole. In addition, the coupled portion may be configured to include an expansion portion that is continuous in the rotation direction with respect to the coupling portion and that is expanded to the outer peripheral side with respect to the rotation locus of the elastic contact surface centering on the attachment hole.
According to such a configuration, as the two connecting portions that overlap in the stacking direction are relatively rotated, the connecting portions come into contact with each other and both terminal fittings are prevented from rotating. Further, since the extended portion of the connected portion is press-fitted into the elastic contact surface of the connecting portion, the contact resistance between the two connecting portions can be lowered.

The outer edge of the extended portion may be configured to extend linearly.
According to such a structure, the expansion part of a to-be-connected part can be press-fitted in a wedge shape with respect to the elastic contact surface of a connection part.

  According to the present invention, it is possible to provide a terminal fitting connection structure that can provide sufficient connection reliability even when forgetting to tighten a bolt.

The top view of the terminal metal fitting in an embodiment The top view of the laminated body which press-fits the expansion part of a to-be-connected part to the elastic contact surface of a connection part, and connects both terminal metal fittings in a lamination | stacking state. AA line sectional view in FIG. Side view showing a state where bolts are inserted through two mounting holes and bolted together. The top view which expands and shows a mode that the expansion part of a to-be-connected part is press-fitted in the elastic contact surface of a connection part The top view which illustrated the area | region where the expansion part is provided in the to-be-connected part by hatching

<Embodiment>
An embodiment of the present invention will be described with reference to the drawings of FIGS. As shown in FIG. 4, the connection structure of the terminal metal fitting in this embodiment arrange | positions the laminated body 40 which connects a pair of grounding terminal 10 in a lamination | stacking state on the terminal block 50 in a regular connection state, and is bolt Bolts are fastened together using B and nuts N. Both ground terminals 10 have the same shape, and are formed in the laminated body 40 by overlapping the ground terminals 10 in the stacking direction and then relatively rotating both ground terminals 10. In the following description, the rotation direction refers to a direction in which the two ground terminals 10 overlapping in the stacking direction are relatively rotated, and the radial direction refers to a direction orthogonal to both the rotation direction and the stacking direction. .

  The terminal block 50 has a plate shape and includes an insertion hole (not shown) through which the bolt B is inserted. The insertion hole is formed through the terminal block 50 in the plate thickness direction. In the present embodiment, the nut N is disposed on the lower side of the terminal block 50 in the stacking direction, and the bolt B is disposed on the upper side of the terminal block 50 in the stacking direction. Therefore, when the bolt B is inserted into the insertion hole from above the terminal block 50 and screwed into the nut N, the stacked body 40 and the terminal block 50 are narrowed in the stacking direction between the bolt B and the nut N. It is like that. Thereby, both the ground terminals 10 are connected so as to be conductive.

  As shown in FIG. 1, the ground terminal 10 is formed by punching a conductive metal flat plate as a base material into a predetermined shape and bending it, and is a plate-like connection provided with a mounting hole 11. A portion 12 and a fixing portion 13 for fixing an electric wire (not shown) are provided. The attachment hole 11 is formed so as to penetrate the connecting portion 12 in the plate thickness direction, and has a hole diameter through which the bolt B can be inserted.

  The connecting portion 12 has a substantially circular outer peripheral edge 12 </ b> A arranged coaxially with the hole edge 11 </ b> A of the attachment hole 11. The connecting portion 12 and the fixing portion 13 are arranged continuously in the radial direction of the mounting hole 11 and have a common substrate portion 14. The substrate portion 14 has a single layer structure composed of a single metal flat plate. Between the hole edge 11 </ b> A of the attachment hole 11 and the outer peripheral edge 12 </ b> A of the connection portion 12, a seat surface that supports the head of the bolt B is formed.

  The fixing portion 13 includes a pair of wire barrel pieces 13A rising from both side edges of the board portion 14 and a pair of insulations rising from both side edges of the board portion 14 at positions farther from the mounting holes 11 than these wire barrel pieces 13A. And a barrel piece 13B. Although both wire barrel pieces 13A are crimped to the core wire exposed at the end of the electric wire, both insulation barrel pieces 13B are crimped to the sheath of the electric wire. Thereby, an electric wire is fixed to the fixing | fixed part 13, and the earthing terminal 10 is connected with the electric wire so that conduction | electrical_connection is possible.

  At the position of the outer peripheral edge 12 </ b> A of the connecting portion 12 that faces the fixed portion 13, a detent portion 16 is formed to project outward in the radial direction. The rotation stopper 16 is provided with a locking piece 17 and a locking hole 18 aligned in the rotation direction. The locking piece 17 has a form that protrudes upward in a cantilevered manner by cutting and raising a part of the detent 16. On the other hand, the locking hole 18 has a substantially square lip and is formed to be slightly larger than the locking piece 17.

  Here, a structure for preventing the rotation of both the ground terminals 10 will be briefly described. First, with respect to the rotation prevention in the clockwise direction, when the upper grounding terminal 10 is rotated in the clockwise direction (the direction in which both the fixing portions 13 approach) from the state where the grounding terminals 10 are overlapped, it is shown in FIG. As described above, the connecting portions 20 described later interfere with each other in the rotation direction, so that the clockwise rotation is restricted.

  Next, with respect to the anti-clockwise rotation prevention, by overlapping the upper and lower rotation prevention portions 16, the lower locking piece 17 is bent and deformed downward by the upper rotation prevention portion 16, and from this state. When the upper grounding terminal 10 is further rotated in the clockwise direction, the lower locking piece 17 fits into the upper locking hole 18 and returns elastically, and the locking piece 17 is locked into the locking hole 18. The rotation in the counterclockwise direction (the direction in which both fixing portions 13 are separated) is restricted by being locked in the rotation direction with respect to the inner wall.

  The ground terminal 10 of the present embodiment includes a connecting portion 20 and a connected portion 30 as a connecting structure for connecting both the ground terminals 10 in a stacked state, in addition to the rotation prevention structure for both the ground terminals 10. Of the two connecting portions 12 overlapping in the stacking direction, the connecting portion 20 provided on the outer peripheral edge 12A of the lower connecting portion 12 is formed by stacking the connected portions 30 provided on the outer peripheral edge 12A of the upper connecting portion 12. By covering from both sides in the direction, the movement of the connected portion 30 in the stacking direction is restricted, and the two connecting portions 12 are connected in a stacked state. Hereinafter, the specific structure of the connection part 20 and the to-be-connected part 30 is demonstrated.

  As shown in FIG. 1, the connecting portions 20 are provided so as to protrude radially outward from the outer peripheral edge 12 </ b> A of the connecting portion 12, and are provided in pairs at positions that are symmetric with respect to the mounting hole 11. An angle of about 45 ° is formed between a line (not shown) connecting both connecting portions 20 around the attachment hole 11 and a line (not shown) connecting the fixed portion 13 and the rotation stopper 16 around the attachment hole 11. It is arranged to cross at

  As shown in detail in FIG. 3, the connecting portion 20 has a protruding portion 21 that is flush with the connecting portion 12 and protrudes radially outward, and is bent at a right angle at the outer edge of the protruding portion 21 and laminated. A standing wall portion 22 that rises upward in the direction, and a facing portion 23 that is bent at a right angle at the upper edge of the standing wall portion 22 and extends inward in the radial direction in a state of facing the overhanging portion 21. ing. A radially inner surface of the standing wall portion 22 is an elastic contact surface 24.

  The distance between the upper surface of the overhanging portion 21 and the lower surface of the facing portion 23 is set slightly larger than the plate thickness of one metal flat plate constituting the connected portion 30. This means that a predetermined clearance is generated in the stacking direction between the connected portion 30 and the connecting portion 20 covering the connected portion 30. Therefore, due to this clearance, the connected portion 30 is rattled in the stacking direction with respect to the connecting portion 20. However, since this clearance is made smaller than the locking allowance between the locking piece 17 and the locking hole 18, the locking state between the locking piece 17 and the locking hole 18 even when rattling occurs. Can be held. That is, it is possible to prevent rotation while connecting both the ground terminals 10 in a stacked state.

  The connected portion 30 is disposed adjacent to the connecting portion 20 on the outer peripheral edge 12 </ b> A of the connecting portion 12. The to-be-connected part 30 is provided in the form connected with the adjacent connection part 20 in the rotation direction. The connecting part 20 and the connected part 30 are arranged in this order in the clockwise direction. A pair of connected portions 30 are provided at positions that are symmetrical with respect to the mounting hole 11, similarly to the two connecting portions 20. A tapered guide slope 31 is formed at the end of the connected portion 30 on the side away from the connecting portion 20.

  In a state where both the ground terminals 10 are connected in a stacked state, the connected portion 30 is disposed between the protruding portion 21 and the facing portion 23 as shown in FIG. For this reason, the upper surface of the to-be-connected part 30 and the lower surface of the opposing part 23 are arrange | positioned in the opposition state so that contact is possible, and the lower surface of the to-be-connected part 30 and the upper surface of the overhang | projection part 21 are arrange | positioned in opposition. Thus, the connection part 20 and the to-be-connected part 30 are comprised so that it may latch in a lamination direction. Thereby, the two connection parts 12 are connected and held in a stacked state.

  The coupled portion 30 includes an expanded portion 32 that is expanded on the outer peripheral side with respect to the rotation locus of the elastic contact surface 24 with the attachment hole 11 as the center. Specifically, as shown in FIG. 6, the minimum point of the elastic contact surface 24 of the connecting portion 20 that minimizes the distance from the axis C of the mounting hole 11 is P1, and the rotation locus of the minimum point P1 is C1. In this case, a region (hatched portion) on the outer side in the radial direction from the rotation locus C <b> 1 in the coupled portion 30 is the extended portion 32. The extended portion 32 is disposed adjacent to the elastic contact surface 24 in the rotation direction.

  Accordingly, when both the ground terminals 10 are rotated, the connected portion 30 of the upper connecting portion 12 of the two connecting portions 12 overlapping in the stacking direction enters the inside of the connecting portion 20 of the lower connecting portion 12. The extended portion 32 contacts the elastic contact surface 24 from the rotational direction. When both the ground terminals 10 are further rotated from here, the outer edge 33 of the extended portion 32 comes into elastic contact with the elastic contact surface 24 from the radially inner side.

  Further, the outer edge 33 of the extended portion 32 is configured to extend linearly from the outer edge 25 of the connecting portion 20, and is configured to approach the axis C of the mounting hole 11 as the distance from the connecting portion 20 increases. For this reason, when both the ground terminals 10 are rotated, the outer edge 33 of the extended portion 32 is pressed into the elastic contact surface 24 in a wedge shape. Thereby, the contact resistance between the two connection parts 12 falls, and electrical connection reliability can be improved. Therefore, even when the bolt B or the nut N is forgotten to be tightened, both the ground terminals 10 can be connected in a conductive manner, and sufficient connection reliability can be obtained.

  The present embodiment is configured as described above, and its operation will be described subsequently. First, the two connecting portions 12 are overlapped so that the connected portion 30 of the upper ground terminal 10 and the connecting portion 20 of the lower ground terminal 10 are arranged in this order in the clockwise direction. Next, when both ground terminals 10 are relatively rotated, the upper connected portion 30 enters the lower connecting portion 20 as indicated by a one-dot chain line L1 in FIG. When the two ground terminals 10 are further rotated, the outer edge 33 of the extended portion 32 of the upper connected portion 30 is in contact with the elastic contact surface 24 of the lower connecting portion 20 as indicated by a two-dot chain line L2 in FIG. Begin to touch. When the two ground terminals 10 are continuously rotated, the outer edge 33 of the extended portion 32 of the upper connected portion 30 is in contact with the elastic contact surface 24 of the lower connecting portion 20 as indicated by a two-dot chain line L3 in FIG. Is pressed against the elastic contact surface 24 in a wedge shape. In this way, the stacked body 40 shown in FIG. 2 is formed.

  Next, as shown in FIG. 3, the common bolt B is inserted into both the mounting holes 11, and the bolt B is inserted into the insertion hole of the terminal block 50. Then, the nuts N are screwed into the bolts B, so that both the ground terminals 10 are bolted together. Thereby, the connection part 12 of both the ground terminals 10 is narrowed from the lamination direction by the bolt B and the nut N, and is connected so as to be conductive. Note that either one of the ground terminals 10 is grounded to the vehicle body (not shown), and the ground terminals 10 are grounded by connecting both the ground terminals 10 to be conductive. Can do.

  On the other hand, if the bolt B is forgotten to be tightened for some reason, that is, if the bolt is not fastened to the laminated body 40, the two ground terminals 10 are not sufficiently in contact with each other in the stacking direction. Of those, those that are not connected to the vehicle body may not be connected to the ground. In that respect, in the ground terminal 10 of the present embodiment, as shown in FIG. 3, the outer edge 33 of the extended portion 32 of the connected portion 30 is press-fitted into the elastic contact surface 24 of the connecting portion 20 from the inside in the radial direction. Since 24 is in elastic contact, both ground terminals 10 are connected so as to be conductive, and both ground terminals 10 can be grounded together.

  As described above, in the present embodiment, the outer edge 33 of the extended portion 32 of the connected portion 30 is elastic from the radially inner side with respect to the elastic contact surface 24 of the connected portion 20 in the connecting portion of the connecting portion 20 and the connected portion 30. Therefore, both the ground terminals 10 can be connected in a conductive state even before the bolts are fastened, that is, in the state of the laminated body 40. Further, since the outer edge 33 of the extended portion 32 is provided so as to extend linearly from the outer edge 25 of the connecting portion 20, the outer edge 33 of the extended portion 32 can be pressed into the elastic contact surface 24 in a wedge shape. The contact resistance between the ground terminals 10 can be reduced. Therefore, even when the bolt B is forgotten to be tightened, sufficient connection reliability can be obtained.

<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) Although the ground terminal 10 for ground connection is illustrated as the terminal fitting in the above embodiment, according to the present invention, the terminal fitting can be used for other purposes as long as it is connected to each other by bolting together. For example, it may be applied to a terminal fitting for signal connection.

  (2) In the above embodiment, a pair of ground terminals 10 having the same shape are connected in a stacked state. However, according to the present invention, a pair of ground terminals having different shapes may be connected in a stacked state.

  (3) Although the connecting portion 20 is provided to protrude radially outward from the outer peripheral edge 12A of the connecting portion 12 in the above embodiment, according to the present invention, the connecting portion is provided by cutting a part of the connecting portion 12 up. May be.

  (4) Although the outer edge 33 of the extended portion 32 is press-fitted into the elastic contact surface 24 in the above embodiment, according to the present invention, it is not always necessary to press-fit, and the standing wall portion is formed to be elastically deformable. It is good also as a structure which the elastic contact surface of a standing wall part contacts elastically from the radial direction outer side with respect to the outer edge of an expansion part.

  (5) Although the to-be-connected part 30 is provided continuously with the connecting part 20 in the above embodiment, according to the present invention, a slit may be provided between the to-be-connected part and the connecting part.

  (6) Although the outer edge 33 of the extension part 32 is connected to the outer edge 25 of the connection part 20 in the above embodiment, according to the present invention, the outer edge of the extension part may be connected to any position of the connection part.

  (7) Although the pair of ground terminals 10 are connected in a stacked state in the above embodiment, according to the present invention, three or more ground terminals may be connected in a stacked state.

10 ... Ground terminal (terminal fitting)
DESCRIPTION OF SYMBOLS 11 ... Mounting hole 12 ... Connection part 20 ... Connection part 24 ... Elastic contact surface 25 ... Outer edge 30 ... Connected part 32 ... Expansion part 33 ... Outer edge B ... Bolt C1 ... Turning locus

Claims (3)

In a terminal fitting configured to include a connection portion provided with a mounting hole in a form penetrating a metal flat plate, a plurality of the connection portions are stacked so that the mounting hole is coaxial, and a plurality of the mounting holes are formed. A terminal fitting connection structure in which a plurality of the terminal fittings are connected to each other by inserting a common bolt and fastening the bolts together.
One of the two connecting portions overlapping in the stacking direction is provided with a connecting portion, and the other is connected to hold the two connecting portions in a stacked state by engaging with the connecting portion in the stacking direction. Part is provided,
The connecting portion has a resilient contact surface that elastically contacts an outer edge of the connected portion in a direction intersecting the stacking direction by relatively rotating the two connecting portions around the mounting hole. Terminal metal connection structure characterized by comprising. The two connecting portions overlapping in the stacking direction are prevented from rotating together by the connecting portion of one connecting portion and the connecting portion of the other connecting portion contacting each other in the rotation direction around the mounting hole. Is supposed to be
The connected portion includes an extended portion that extends in the rotation direction with respect to the connecting portion, and is extended to the outer peripheral side with respect to the rotation trajectory of the elastic contact surface around the attachment hole. The terminal fitting connection structure according to claim 1, wherein:   The terminal fitting connection structure according to claim 2, wherein an outer edge of the extension portion is formed to extend linearly.

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