JP6294253B2 - Terminal block - Google Patents

Description

  The present invention relates to a terminal block that is used by inserting a wire of an electric wire.

  Conventionally, in a terminal block, the coating of the electric wire is peeled off, the terminal is crimped to the element wire, and is fixed to the terminal block with a screw.

JP 2009-170207 A

  The conventional wiring work is time-consuming because the wire is stripped, the crimp terminal is crimped to the element wire, and is fastened and fixed to the terminal block with screws. In addition, since the screw is loosened rarely and burnout due to poor contact or malfunction of the equipment occurs, it was necessary to perform multiple tightening to confirm that it was securely tightened.

  Accordingly, the present invention has been made to solve the above-described problems, and in the operation of connecting the electric wire to the terminal block in the panel, the connecting operation and the tightening can be easily performed without attaching the crimp terminal to the electric wire connecting portion. Provide a terminal block that can be checked.

According to one aspect of the present invention, a case main body composed of an upper case and a lower case, a wire fixing metal fitting for fixing a wire of a wire placed in the lower case by pressing from above, and the element A terminal block provided with a presser spring that always pushes down the wire fixing bracket downward, and the upper case is formed with a wire insertion hole so that the wire with the sheath peeled off to expose the element wire can be inserted from the side. The lower case has a mortar shape on the surface facing the upper case and a conductive terminal block conductor is formed, and the element wire is placed so as to crawl in the mortar shape, The wire fixing metal fitting is crimped from above the element wire in a state of being laid over the terminal block conductor of the lower case, and the wire fixing metal fitting includes an insulating knob and a shaft portion connected to the lower side of the insulating knob. And a rotation suppressing part connected to the lower part of the shaft part. The wire holding part is connected to the lower part of the rotation suppressing part, and the insulation knob is formed so that a user can grip the wire fixing bracket with a finger so that the wire fixing bracket can be rotated by about 90 degrees. The fixing bracket is characterized in that a presser screw having a substantially triangular pyramid cross section is formed in the vicinity of the end of the shaft portion on the insulating knob side about one round of the shaft portion .

  According to the present invention, in the operation of connecting the electric wire to the terminal block in the panel, the connection operation and the tightening confirmation can be easily performed without attaching the crimp terminal to the electric wire connecting portion.

It is a figure which shows schematic structure of the terminal block which concerns on embodiment of this invention. It is a figure which shows the general | schematic cross section along AA of the terminal block shown in FIG. It is a perspective view of a strand fixing metal fitting.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the drawings, the same portions are denoted by the same reference numerals, and redundant description is omitted.

  FIG. 1 is a diagram showing a schematic configuration of a terminal block 100 according to an embodiment of the present invention. FIG. 2 is a diagram showing a schematic cross-section along AA of the terminal block 100 shown in FIG. As shown in FIGS. 1 and 2, the terminal block 100 according to the present embodiment is roughly composed of a wire fixing bracket 1, an upper case 2, a lower case 3, and a presser spring 7.

  The upper case 2 is paired with the lower case 3 to form a case body, and an electric wire insertion hole 4 is formed so that the electric wire 5 can be inserted from the side surface direction. Further, the upper case 2 is formed with a shaft hole 2 a for inserting a shaft portion 12 (described later) of the wire fixing bracket 1 in a direction orthogonal to the wire insertion hole 4. In the vicinity of the opening of the shaft hole 2a, a presser screw guide 10 that fits with a presser screw 15 (described later) is formed about one turn around the shaft hole 2a. Further, a presser spring storage portion 8 is formed in communication with the shaft hole 2a. A presser spring 7 which will be described later is interposed in the presser spring storage portion 8, and a rotation suppression portion 13 which will be described later is fitted therein. Each of the rotation suppression unit 13 and the presser spring storage unit 8 has a non-circular cross section and a similar shape. When the rotation suppressing portion 13 is fitted into the presser spring storage portion 8, the rotation of the wire fixing bracket 1 is suppressed.

  The lower case 3 is paired with the upper case 2 to form a case body, and a mortar-shaped terminal block conductor 9 is formed on the surface facing the upper case 2. The terminal block conductor 9 has electrical conductivity, and is placed so that the wire 6 of the electric wire 5 crawls in a mortar shape.

  The strand fixing metal fitting 1 is for crimping the strand 6 in a state of being placed on the terminal block conductor 9 of the lower case 3 from above and fixing it so as to press against the terminal block conductor 9. FIG. 3 is a perspective view of the wire fixing bracket 1. As shown in FIG. 3, the wire fixing bracket 1 includes an insulating knob 11, a shaft portion 12 connected to the lower portion of the insulating knob 11, a rotation suppressing portion 13 connected to the lower portion of the shaft portion 12, and the rotation. It is comprised from the strand holding part 14 connected below the suppression part 13. As shown in FIG. The insulation knob 11 is formed so that the user can pick up the wire fixing bracket 1 with his / her finger so that the wire fixing bracket 1 can be rotated about 90 degrees. In the vicinity of the end of the shaft portion 12 on the insulating knob 11 side, a presser screw 15 having a substantially triangular pyramid cross section is formed about one turn of the shaft portion 12.

  When the insulation knob 11 of the wire fixing bracket 1 is pulled upward, the wire insertion hole 4 opens to the inside of the terminal block, and the wire 6 of the wire 5 can be inserted.

  The presser spring 7 is interposed between the shaft portion 12 of the wire fixing bracket 1 and the presser spring storage portion 8 of the upper case 2 and always plays a role of pressing down the wire fixing bracket 1 downward. The presser spring 7 is preferably a compression coil spring, for example.

  As described above, the rotation suppressing portion 13 of the wire fixing bracket 1 and the presser spring storage portion 8 of the upper case 2 are both non-circular in cross section and have similar shapes. When the rotation suppression unit 13 enters the presser spring storage unit 8, rotation of the wire fixing bracket 1 can be suppressed.

  When the presser screw 15 is fitted into the presser screw guide 10 of the upper case 2 and the insulating knob 11 is turned, the wire fixing bracket 1 is rotated downward by about 90 °, and the wire fixing bracket 1 is pushed downward as the presser screw 15 and the presser screw guide 10 are engaged. It is done.

  The position where the presser screw 15 and the presser screw guide 10 are fitted exactly coincides with the position where the rotation suppressing portion 13 of the wire fixing bracket 1 is disengaged from the presser spring storage portion 8 of the upper case 2.

  The strand retainer 14 and the terminal block conductor 9 have a mortar shape as shown in FIG.

  After the element 6 of the electric wire 5 is inserted into the electric wire insertion hole 4 and the insulating knob 11 that has been picked is released, the element 6 is sandwiched between the element holding part 14 and the terminal block conductor 9 by the action of the holding spring 7 and is in close contact with it. To do.

  The upper case 2 and the lower case 3 are fixed by screws 16, for example.

  The terminal block 100 can be configured by combining a plurality of sets, each of which includes the wire fixing bracket 1, the upper case 2, the lower case 3, and the presser spring 7.

<Operation>
Next, the operation of the terminal block configured as described above will be described.

  The electric wire 5 to be connected is in a state where the coating at the tip is peeled off and the wire 6 is exposed. In this embodiment, it is not necessary to crimp a terminal to the strand 6 or the like.

  When the insulation knob 11 of the wire fixing bracket 1 is lifted upward, the wire 6 is inserted into the wire insertion hole 4 and the insulation knob 11 is released, the wire 6 is pulled by the pressure of the holding spring 7. It is pressed by the holding part 14 from above and contacts the terminal block conductor 9.

  When the insulation knob 11 is further pressed from above, the presser screw 15 is fitted into the presser screw guide 10 of the upper case 2, and when it is rotated by approximately 90 °, the wire fixing bracket 1 moves further downward, and the wire 6 and the terminal block conductor 9 are moved. Adheres with sufficient pressure.

  In this way, the electric wire 5 can be easily and reliably connected to the terminal block by a series of operations including the pulling up of the insulating knob 11, the insertion of the element wire 6, and the rotation of the insulating knob 11.

  In a state where the element wire 6 is inserted into the electric wire insertion hole 4, the insulation knob 11 cannot be rotated because the rotation suppressing portion 13 is in the presser spring accommodating portion 8. When the insulating knob 11 is pushed from above, the presser screw 15 is fitted into the presser screw guide 10 of the upper case 2 and at the same time, the rotation suppressing part 13 comes out of the presser spring storage part 8 and becomes rotatable. When the insulating knob 11 is rotated in this state, the presser screw 15 can be rotated only up to about 90 ° by the stopper of the presser screw guide 10 and stopped.

  With the structure according to the present embodiment, it is possible to visually determine whether the wire 6 and the terminal block conductor 9 are in close contact with each other with sufficient pressure in the direction of the insulating knob 11. Confirmation is not required.

  When the element wire 6 is inserted into the electric wire insertion hole 4, the charging unit is not exposed to the outside of the terminal block 100, so that it is possible to reduce the risk of electric shock during work during power reception such as maintenance.

  In addition, since the fixing operation of the element wire 6 is only the rotation operation of the insulating knob 11, the operation can be performed if the other terminal is charged even if the other terminal is charged.

  Since the element holder 14 and the terminal block conductor 9 have a mortar shape as shown in FIG. 2, a sufficient contact area with the element 6 can be secured. Further, the structure is such that the wire 6 can be easily inserted and pulled out in the open state and does not easily fall off in the tightened state.

  As described above, according to the embodiment of the present invention, connection work and tightening confirmation can be easily performed in the work of connecting the electric wire to the terminal block in the panel.

  Although several embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

DESCRIPTION OF SYMBOLS 100 ... Terminal block 1 ... Wire fixing bracket 2 ... Upper case 3 ... Lower case 4 ... Electric wire insertion hole 5 ... Electric wire 6 ... Element wire 7 ... Holding spring 8 ... Presser spring storage part 9 ... Terminal block conductor 10 ... Presser screw guide 11 ... Insulation knob 12 ... Shaft part 13 ... Rotation suppression part 14 ... Strand presser part 15 ... Presser screw 16 ... Screw

Claims (3)

A case body composed of an upper case and a lower case, a wire fixing bracket that fixes the wire of the electric wire placed in the lower case by pressing from above, and a presser that always pushes down the wire fixing bracket downward A terminal block with a spring,
The upper case is formed with an electric wire insertion hole so that the electric wire from which the element wire is exposed by stripping the sheath can be inserted from a side surface direction.
The lower case has a mortar shape on the surface facing the upper case and a conductive terminal block conductor is formed, and the strands are placed so as to crawl in the mortar shape,
The strand fixing metal fitting is crimped from above the strand in a state of being laid over the terminal block conductor of the lower case ,
The wire fixing bracket includes an insulating knob, a shaft portion connected below the insulating knob, a rotation suppressing portion connected below the shaft portion, and a wire holding portion connected below the rotation suppressing portion. Consisting of
The insulation knob is formed so that a user can pick the wire fixing bracket with a finger so that the wire fixing bracket can be rotated about 90 degrees,
The element fixing bracket is provided with a presser screw having a substantially triangular pyramid cross-section in the vicinity of the end of the shaft portion on the insulating knob side. Terminal block. A shaft hole for inserting the shaft portion in a direction orthogonal to the wire insertion hole is formed in the upper case, and a presser screw guide that fits the presser screw is provided near the opening of the shaft hole. It is formed around one hole,
The pressing spring storage portion into which the hold-down spring in communication with the shaft hole is interposed is formed on the pressing spring storage portion, according to claim 1, wherein the rotation suppressing part is characterized in that it is fitted Terminal block. The upper case is formed with a presser spring storage portion that stores the presser spring,
Each of the rotation suppression portion and the presser spring storage portion has a non-circular cross section and a similar shape. When the rotation suppression portion enters the presser spring storage portion, the wire fixing bracket rotates. The terminal block according to claim 2 , wherein the terminal block can be suppressed.

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