JPH037026Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention mainly relates to terminal terminals for connecting electric wires using crimp terminals in electrical metering/measuring equipment for power distribution such as watt-hour meters. .

(Prior art) For example, in order to connect electric wires on the power distribution line side and the electric power consumer side to a power meter such as AC three-phase three-wire wiring, it has recently become desirable to connect the electric wires using a crimp terminal connection method. There is. This crimp terminal 1 is as shown in FIG. 4, and the insulation coating at the tip of the electric wire 2 is peeled off to expose the core wire 3, and the exposed core wire 3 is inserted into the clamping tube 1a of the crimp terminal 1. The clamping cylindrical portion 1a is caulked and the exposed core wire 3 is crimped and clamped, and on the other hand, for the terminal terminal on the power meter side, a bolt/nut is inserted using the connection bolt through hole 1b drilled in the crimp terminal 1. This has the advantage that the crimp terminal 1 can be easily attached and detached from the terminal terminal, that is, the electric wire 2 can be easily attached and detached when the watt-hour meter is replaced regularly.

The conventional terminal terminal 4 proposed for such a crimp terminal connection has a connection bolt through hole corresponding to the crimp terminal side connection bolt through hole 1b in the crimp terminal connection area, as shown in FIGS. 5 and 6. 5
The head 6 of the connecting bolt 6 is drilled and passed through the connecting bolt through hole 5 on the back side of the terminal terminal as shown in Figure 7.
A hexagonal recess 7 is formed into which the hole 7 is fitted. In order to facilitate crimp terminal connection in a watt-hour meter with a large current capacity that uses a thick wire 2, the terminal 4 is assembled into the watt-hour meter with the connecting bolt 6 passed through the connecting bolt through hole 5 in advance. Therefore, when tightening the fastening nut 8 onto the connecting bolt 6 to connect the crimp terminal, the connecting bolt 6 must be
Make sure that the bolt head 6a and the recess 7 do not rotate together.
The rotation of the connecting bolt 6 is inhibited by this fitting.

(Problem to be solved by the invention) By the way, in order to form the recess 7 to prevent the connection bolt from rotating as described above, the plate thickness of the terminal terminal 4 must be increased accordingly, and the recess must also be made thicker. In order to form the hole, it is necessary to use soft copper for the terminal terminal 4, and when pressing the sinkhole, the thickness of the board will swell, causing swelling around the sinkhole.To avoid this, the number of holding forms is increased and the processing work The above complications will also arise.

Therefore, in order to prevent such a problem, as shown in FIG. 8, upright stop portions 7', 7' are formed by bending at the peripheral edge of the connection bolt through hole 5 to prevent the connection bolt from rotating. It is possible to do so.

However, in such upright rotation prevention parts 7', 7', thick terminal terminals 4' are used,
If sturdy upright rotation stopper parts 7', 7' that do not deform in the direction of the arrow shown in FIG. Due to the formation of ', 7', cracks will occur from the cut portion 7'a, and therefore, in order to prevent this crack from occurring, there is a restriction that the plate thickness of the terminal cannot be made too thin.

Accordingly, an object of the present invention is to provide a crimp terminal connection terminal that is thin in plate thickness, strong in strength, and easy to process.

(Means for Solving the Problems) The present invention is a terminal terminal for connecting a crimp terminal fixed to the tip of an electrical wiring to an electric device such as a watt-hour meter, and the crimp terminal of the terminal body made of sheet metal. In addition to drilling a connection bolt through hole in the connection part, a part near the connection bolt through hole on the back side of the terminal body is engaged with the hexagonal head of the connection bolt passed through the connection bolt through hole on the side so that it cannot rotate. The gist of the present invention is a terminal terminal for connecting a crimp terminal of an electric device, which is formed by expanding a raised portion by pressing from the front side of the terminal main body.

(Embodiment) Hereinafter, one embodiment of the present invention will be explained using the drawings of FIGS. 1 to 3.

The terminal terminal body 9 is made of a brass sheet metal, and a connection bolt through hole 10 corresponding to the crimp terminal side connection bolt through hole 1b is bored in the crimp terminal connection area, and a connection bolt through hole 10 is bored on the back side of the terminal terminal body 9. A pair of slightly laterally elongated protuberances 11, 11 are stamped out from the front side by press working and are swollenly placed between the hole 10. When the connecting bolt 12 is passed through the connecting bolt through hole 10, the bolt head 6a shown by the chain line in FIG.
The protruding portion 1
1 and 11 are a pair of opposite sides 6a of the bolt head 6a,
6b. In FIG. 2, holes designated by reference numerals 12 and 12 are holes formed on the front side of the terminal body when pressing is applied to expand the raised portions 11 and 11.

The terminal terminal A thus configured is assembled into the terminal part of the watt-hour meter with the connecting bolt 6 passed through the connecting bolt through hole 10 from the back side and the bolt head 6a fitted between the raised parts 11, 11. In this state, the crimp terminal 1 is placed against the terminal A by passing the connecting bolt through hole 1b through the connecting bolt 6, and the crimp terminal is attached to the terminal A by screwing the fastening nut 8 as shown in FIG. 1 is connected.

(Effects) As detailed above, according to the present invention, to prevent the connection bolt from rotating, the hexagonal head of the connection bolt passed through the connection bolt through hole is placed on the back side of the terminal body near the connection bolt through hole. Since the protrusion that engages the sides and becomes unrotatable is expanded by pressing from the front side of the terminal body, the thickness of the terminal body can be made thinner without causing cracks due to the expansion. Figure 5: For conventional configuration, 3.5m/m is required.
This can be suppressed to about 2.5m/m, which contributes to material reduction, and by using brass, which is advantageous in terms of strength, it can be used for practical purposes regardless of the reduction in board thickness. Moreover, it is easy to process,
It is possible to eliminate unnecessary swelling caused by material escape during conventional press processing.

[Brief explanation of the drawing]

1 to 3 show an embodiment of the present invention,
Figure 1 is a back view of the terminal, Figure 2 is the
FIG. 3 is a side view showing the crimped end connected state. Fig. 4 is a perspective view showing an example of a crimp terminal, Fig. 5 is a back view of a conventional terminal terminal, and Fig. 6 is a perspective view showing an example of a crimp terminal.
Fig. 7 is a side view showing the crimp terminal connection state of the terminal terminal in Fig. 5;
FIG. 8 is a back view of a terminal terminal showing a comparative example with respect to the terminal terminal of the present invention. 9... Terminal body, 10... Connection bolt through hole, 11... Protrusion.

Claims (1)

[Scope of utility model registration request] A terminal terminal for connecting a crimp terminal fixed to the tip of an electrical wiring to an electrical device such as a watt-hour meter, and a connection bolt through hole is drilled in the crimp terminal connection part of the terminal terminal body made of sheet metal, and the terminal On the back side of the terminal body, in the vicinity of the connection bolt through hole, a raised part is pressed from the front side of the terminal body, which engages the hexagonal head of the connection bolt passed through the connection bolt through hole laterally and prevents rotation. Terminal terminal for connecting crimp terminals of electrical equipment made by expanding the terminal.