JPH0526906Y2 - - Google Patents

Description

[Detailed Description of the Invention] "Industrial Application Field" The present invention relates to a terminal block incorporating a surge absorbing element.

``Problems to be solved by conventional techniques and ideas'' Conventionally, surge absorbing elements such as varistors, diodes, and capacitors have been directly fixed to terminal blocks by screws, soldering, etc. This method is
Not only is it troublesome to install and remove, but it also requires a lot of effort to replace when damaged by lightning surges or the like. In addition, as shown in FIG. 6, when connecting plate-shaped terminals 59 and 59 for wiring connection and incorporating a surge absorbing element 31 such as a varistor between three different phases, it is possible to install the surge absorbing element 31 on the terminal block without using a shot bar or the like. It was impossible to incorporate it. Note that the locations indicated by black circles correspond to the contacts 21.

``Means for Solving the Problems'' In view of the above circumstances, the present invention provides a surge absorbing element that can be detachably attached to a terminal block in order to facilitate the installation and removal of the surge absorbing element, and also provides a three-phase In order to easily connect surge absorbing elements when incorporating surge absorbing elements between different phases, this is a surge absorbing element built-in terminal block in which multiple surge absorbing elements are arranged and stacked, and the lead of the surge absorbing element is attached to the plate-like terminal for wiring connection. This is a terminal block with a built-in surge absorbing element that has contacts arranged in three locations to attach and detach the wires.

``Operation'' The lead wire of the surge absorbing element can be inserted into the contacts of the stacked terminal blocks across the terminal blocks, and removed by pulling it out.

"Example" The present invention will be described in detail based on a specific example shown in FIGS. 1 to 5.

The terminal block 1 is a terminal block 1 as shown in FIGS. 1 to 5.
A plate-shaped terminal 3 is placed and supported on a support piece 2 on one side of the plate. Two guide holes 4 are bored in this plate-shaped terminal 3, and a washer 7 that connects a horizontal piece 5 and a vertical piece 6 is provided so that the vertical piece 6 can be raised and lowered into the guide hole 4, and is supported by a coil spring 8. It is biased upward. A terminal screw 9 is screwed onto the horizontal piece 5 of the washer 7, and a crimp terminal (not shown) at the end of the wiring is inserted into the screw hole 10 cut in the plate terminal 3, and then screwed and crimped. The terminal is held between the horizontal piece 5 of the washer 7 and the plate-shaped terminal 3.

The terminal blocks 1 made in this manner are arranged and stacked, and at the ends thereof, end plates 12 as shown in FIGS. 3 and 4 are stacked from both sides. The guide piece 14 of the terminal block 1 is received and connected.

Three contacts 21 shown in FIG. 5 are fitted into the three support holes 14 of the plate-shaped terminal 3.

As shown in FIG. 5, the contactor 21 is a plate-shaped body, and has one contact piece 53 having an arcuate cross section 51 at the tip and an outwardly facing engagement piece 52 protruding from the base end; The other contact piece 56 is formed to have an arcuate cross section 54 and has an outwardly directed engaging piece 55 protruding from its base end, with the arcuate portion facing each other, and the base end portions are connected by a connecting piece 57.
When the contact 21 is inserted into the square support hole 15 drilled in the plate-shaped terminal 3, the contact piece 53 and the contact piece 56 are deformed so that the engagement pieces 52 and 55 are placed above the support hole 15. Contact pieces 53 and 56 are arranged so that they elastically engage with the edges and the arcuate portions elastically abut each other.
The connecting angle between the base end portion and the connecting piece 57 is set. This continuous angle is set to an obtuse angle within a range that provides elasticity when bent at right angles.

As shown in Fig. 3 and Fig. 4, the plate-shaped terminal block 3
Three terminal blocks 1 each having three contacts 21 fitted therein are stacked side by side, and end plates 12 are provided at both ends. Terminal block 1 from left to right as you face the diagram.
a, 1b, and 1c, and the contacts 21 are designated 21a, 21b, and 21c in order from top to bottom in the figure. Here, to explain the case where the surge absorbing element 31 is installed between three different phases, first, the surge absorbing element 31 is installed between the contact 21a of the center terminal block 1b and the contact 21a of the right terminal block 1c. Lead wires 32a and 32
Insert and secure b. Next, the second surge absorbing element 31 is fixed by inserting its lead wires 32a and 32b into the contact 21b of the left terminal block 1a and the contact 21b of the center terminal block 1b, respectively. The last surge absorbing element 31 is the contact 21c of the left terminal block 1a and the right terminal block 1c.
The contact 21c and its lead wires 32a, 32b
Insert each. FIG. 4 is a cross-sectional view taken from FIG. 3, showing a state in which the surge absorbing element 31 is fitted onto the contact 21.

"Effects of the invention" As described above, the present invention is a terminal block with built-in surge absorbing elements in which multiple surge absorbing elements are arranged and stacked, and the lead wires of the surge absorbing elements are detachably attached to the plate-shaped terminal for wiring connection. Since the elements are arranged in three locations, when the surge absorption element is installed between three different phases, it can be installed without using a shot bar or the like, and without having to place the surge absorption element diagonally in a slanted state. be able to.

[Brief explanation of the drawing]

Figures 1 to 5 are diagrams showing a specific embodiment of the present invention, in which Figure 1 is a perspective view of the terminal block, Figure 2 is a front view of Figure 1, and Figure 3 is a diagram showing three terminal blocks. A plan view of the terminal blocks stacked side by side with end plates arranged at both ends and three surge absorbing elements installed, Figure 4 is a cross-sectional view of Figure 3, and Figure 5 is the wiring connection of the contacts. Perspective view showing how it is attached to the plate-shaped terminal, No. 6
The figure is a circuit diagram. 1...Terminal block, 3...Plate terminal for wiring connection, 3
1... Surge absorption element, 32a, 32b... Lead wire, 21... Contact.

Claims (1)

[Scope of utility model registration request] This is a terminal block 1 with built-in surge absorbing elements in which a plurality of surge absorbing elements are arranged and stacked, and the lead wire 3 of the surge absorbing element 31 is inserted into the rectangular support hole 15 of the plate-shaped terminal 3 for wiring connection.
2a, 32b are detachably provided, the distal ends are formed into arcuate cross sections 51, 54, and the proximal ends are provided with engaging pieces 5 facing outward.
A surge absorbing element in which plate-shaped contacts 21 are arranged at three locations, in which a contact piece 53 and a contact piece 56 with protruding numbers 2 and 55 are arranged with their arcuate parts facing each other and connected at the base end by a connecting piece 57. Built-in terminal block.