JP2012216394A - Terminal block and power distribution device using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a terminal block having safety function which reliably responds to an abnormality such as an incomplete connection of a terminal.SOLUTION: The terminal block 100 is configured in that a shaft 30 having thermal conductivity is provided on a terminal block body 10, heat is transferred to a thermal fuse unit 20 by the shaft 30, and temperature of the heat is detected. The terminal block includes a primary-side terminal part 11 connected to a primary-side terminal, a secondary-side terminal part 12 connected to a secondary-side terminal. The terminal block also includes the shaft (heat pipe) 30 having thermal conductivity provided in a region between the primary-side terminal part and the secondary-side terminal part along an arrangement direction of the terminal over the full width. The thermal fuse unit 20 is connected to the shaft 30. The thermal fuse unit 20 mounts a thermal fuse 23 on a terminal board 15 from which a wire 24 is drawn out.

Description

  The present invention relates to a terminal block and a power distribution apparatus using the terminal block, and more particularly to a terminal block having a temperature sensing function such as a temperature fuse and having a temperature detection function.

  Conventionally, electrical equipment storage boxes such as distribution boards, control panels, etc. relay the wires from internal electrical equipment (internal wires or secondary wiring) and external wires (external wires or primary wiring). The terminal block which performs is provided (for example, refer patent document 1). In such a terminal block, the manufacturer of the electrical equipment storage box connects the internal electric wires from the electrical equipment in the electrical equipment storage box. On the other hand, the external electric wire is connected by the construction contractor at the site after the electrical equipment storage box is installed at the site.

JP 2005-69638 A

  Thus, the terminal block to which the internal electric wire, that is, the secondary wiring, and the external electric wire, that is, the primary wiring are connected is shipped with the internal electric wire connected, and only the external electric wire is connected on site. However, when an on-site contractor connects an external electric wire in the electrical equipment storage box, there is a problem that the connection is loosened and heat is easily generated.

  The present invention has been made in view of the above circumstances, and its purpose is to provide a terminal block having a safety function that allows a temperature sensitive part such as a thermal fuse to react reliably to abnormalities such as incomplete connection of terminals. It is to provide.

  In order to achieve the above object, a terminal block according to the present invention comprises a primary terminal portion connected to a primary terminal, a secondary terminal portion connected to a secondary terminal, the primary terminal portion or the A heat conductive shaft provided in the full width along the terminal arrangement direction and adjacent to at least one of the secondary terminal portions, and a temperature sensing portion connected to the shaft.

  Further, the present invention includes the terminal block, wherein the temperature sensing part is a thermal fuse.

  Moreover, this invention is the said terminal block, Comprising: The said shaft is a heat pipe and the said thermal fuse is provided in the end of the said shaft.

  Further, the present invention is the above-mentioned terminal block, comprising a separate portion that separates the primary side terminal portion and the secondary side terminal portion, and the heat pipe is disposed over a region corresponding to the entire width of the separate portion. Including

  Moreover, this invention is the said terminal block, Comprising: The said heat pipe includes what was arrange | positioned over the area | region equivalent to a full width in the lower layer of the said separate part.

  Moreover, this invention is the said terminal block, Comprising: The said primary side terminal part and the secondary side terminal part are formed as an independent terminal block for every terminal, The said shaft mutually mutually connects the said several terminal block. It includes what constitutes a fixing shaft to be fixed.

  Moreover, this invention comprises a power distribution apparatus with the said terminal block.

According to the above configuration, it is possible to provide a terminal block capable of ensuring safety by allowing a temperature sensitive part such as a thermal fuse to react reliably to an abnormality such as incomplete connection of terminals.
For this reason, the terminal block is not further heated and burned out or ignited.

The perspective view which shows the terminal block of Embodiment 1 of this invention It is a disassembled perspective view which shows the terminal block of Embodiment 1 of this invention, (a) is a terminal block main body, (b) is a figure which shows a thermal fuse unit. It is a figure which shows the terminal block of Embodiment 1 of this invention, (a) is a top view, (b) is a front view, (c) is a side view. AA cross-sectional view of FIG. The figure which shows the modification of the terminal block of Embodiment 1. The perspective view which shows the distribution board using the terminal block of Embodiment 2. FIG. Sectional drawing which shows the terminal block of Embodiment 3 Sectional drawing which shows the terminal block of Embodiment 4.

The terminal block of the present invention will be described in detail with reference to the drawings.
(Embodiment 1)
FIG. 1 is a perspective view showing the terminal block of the first embodiment (before the thermal fuse unit is mounted), FIG. 2 is an exploded perspective view showing the terminal block, (a) is the terminal block body, and (b) is the sensitivity. It is a figure which shows the temperature fuse unit as a temperature unit. 3A and 3B are diagrams showing the terminal block, where FIG. 3A is a top view, FIG. 3B is a front view, and FIG. 3C is a side view. FIG. 4 is a cross-sectional view taken along the line AA in FIG.

As shown in FIG. 1, the terminal block 100 is provided with a thermally conductive shaft 30 in the terminal block body 10, and heat is transferred to the thermal fuse unit 20 through the shaft 30 to detect the temperature. Is. This terminal block includes a primary side terminal portion 11 connected to the primary side terminal and a secondary side terminal portion 12 connected to the secondary side terminal. In the region between the primary terminal portion and the secondary terminal portion, a heat conductive shaft (heat pipe) 30 is provided in the entire width along the terminal arrangement direction. FIG. 1 shows a state before the thermal fuse unit is mounted. As shown in FIG. 2, the thermal fuse unit 20 is connected to the shaft 30. In the thermal fuse unit 20, the thermal fuse 23 is mounted on the terminal board 15, and the electric wire 24 is led out from the terminal board 15.
Here, the primary side terminal portion 11 and the secondary side terminal portion 12 both have eight terminals, but each terminal portion is separated by a partition wall 10s. As the thermal fuse 23, a thermal fuse 23 that detects and blows when a predetermined temperature or higher is used constitutes the thermal fuse unit 20. And the thermal fuse 23 is connected to the electric wire 24 which comprises a signal wire | line.
In this terminal block, a separate portion 13 that separates the primary side terminal portion 11 and the secondary side terminal portion 12 is formed integrally with the terminal block main body 10.

The primary side terminal portion 11 achieves electrical connection between each terminal of the primary side wiring and the terminal base body 10 by screwing the terminal screw 11a into a screw hole provided in the base 11b. Further, the secondary side terminal portion 12 achieves electrical connection between each terminal of the secondary side wiring and the terminal base body by screwing the terminal screw 12a into the screw hole provided in the base 12b. Yes.
Reference numerals 14 denote support plates at both ends of the terminal block body 10, each having a support plate body 14a, a mounting projection 14b, and a screw 14c. 14d is an external connection terminal part. Reference numeral 15 denotes a terminal plate, and the primary side terminal portion and the secondary side terminal portion are connected by a wiring pattern formed on the terminal plate 15.

According to the above configuration, by using a heat conductive shaft 30 such as a heat pipe, when the vicinity of the shaft 30 reaches a predetermined temperature or higher, the heat is transferred to the thermal fuse 23, so that the temperature is extremely easily reached. The sensitivity of the fuse 23 can be increased. The shaft is made of a material having excellent thermal conductivity such as copper or aluminum.
Moreover, according to the said structure, a thermal fuse can be highly sensitive only by arrange | positioning a heat pipe.
In addition, each terminal is securely held by a plurality of protrusions of the terminal block body 10, that is, the partition wall 10 s, but when any terminal exceeds the allowable temperature, the fact that the temperature has become high can be easily obtained via the heat pipe Can be transferred to thermal fuse. Thus, in the terminal block of this embodiment, one thermal fuse is sufficient for eight terminals, and heat is efficiently transferred along the terminal arrangement direction of the terminal block by the heat pipe. .
Further, according to this configuration, the sensor can surely react to an abnormality such as an incomplete connection of terminals, and thus acts as a reliable safety device.

  In the above embodiment, the temperature fuse is used. However, instead of the temperature fuse that is blown by detecting a high temperature, a temperature sensor is simply used to transmit a warning signal or to generate a warning sound at another location. You may do it.

  In the above embodiment, one thermal fuse is used for eight terminals, but a thermal fuse may be arranged at both ends of the heat pipe as shown in a modified example in FIG.

(Embodiment 2)
Next, Embodiment 2 of the present invention will be described with reference to the drawings.
FIG. 6 is a perspective view showing a distribution board using the terminal block of the second embodiment.
In the present embodiment, a distribution board B using a terminal block 100 in which a heat conductive shaft 30 made of a heat pipe is disposed between the primary terminal portion 11 and the secondary terminal portion 12 will be described.
The distribution board B has a normal configuration, but includes a display unit D and a terminal block 100. The terminal block 100 includes a shaft (not shown) in a separate portion 13 between the primary side terminal portion 11 and the secondary side terminal portion 12. The thermal fuse constitutes a thermal fuse unit, which is attached to a resin separate part 13 formed integrally with the terminal block main body 10. In addition, the same code | symbol is attached | subjected about the part same as the terminal block of Embodiment 1 shown in FIG. 1, and the detailed description is abbreviate | omitted.

  In the first embodiment, the temperature fuse is used. However, in this embodiment, a temperature sensor is simply used instead of the temperature fuse that is blown by detecting a high temperature, and a warning signal is transmitted. A warning sound may be emitted at the place.

(Embodiment 3)
Next, a terminal block according to Embodiment 3 of the present invention will be described. In this terminal block, as shown in a sectional view in FIG. 7, the position of the thermally conductive shaft 30 is arranged at the lower part. That is, instead of the separate portion 13 on the upper surface of the terminal plate 15 that separates the primary side terminal portion 11 and the secondary side terminal portion 12 from the terminal block, a heat pipe is formed as a heat conductive shaft 30 directly below the separate portion 13. Provided.

  A through groove 13M0 that passes through the region between the primary and secondary side terminal portions is provided directly below the separating portion 13, and a shaft 30 formed of a heat pipe is inserted into the through groove 13M0, and the temperature sensor unit 20S is inserted into the end portion. Wearing. The separate portion including the through groove 13M0 is integrally formed with the terminal block body 10.

  As shown in FIG. 7, the terminal block 100 </ b> S is similar to the terminal block shown in the first embodiment, in the terminal block body 10, the primary side terminal portion 11 connected to the primary side terminal, and the secondary side terminal. And a temperature sensor unit 20S for detecting a temperature change. The temperature sensor unit 20S is mounted in a through groove 13M0 provided in the separate portion, and is configured to directly contact the terminal plate 15 of the terminal block.

The primary side terminal portion 11 achieves electrical connection between each terminal of the primary side wiring and the terminal base body 10 by screwing the terminal screw 11a into a screw hole provided in the base 11b. Further, the secondary side terminal portion 12 achieves electrical connection between each terminal of the secondary side wiring and the terminal base body by screwing the terminal screw 12a into the screw hole provided in the base 12b. Yes.
Reference numerals 14 denote support plates at both ends of the terminal block body 10, each having a support plate body 14a, a mounting projection 14b, and a screw 14c.

  According to the above configuration, since the temperature sensor 23S is provided at the end of the heat pipe, the temperature sensor 23S reliably reacts to abnormalities such as incomplete connection of the terminals, and the both sides of the primary side and the secondary side Anomaly detection is possible.

  Further, in the present embodiment, a through groove is formed over the entire length of the separation part of the terminal block, and heat is conveyed to the temperature sensor 23S through the heat pipe in the through groove. Is realized.

(Embodiment 4)
Next, a terminal block according to a fourth embodiment of the present invention will be described. As shown in the sectional view of FIG. 8, this terminal block uses a thermally conductive shaft 30 for fixing the primary side terminal portion and the secondary side terminal portion. In the present embodiment, the primary side terminal portion and the secondary side terminal portion are formed as independent terminal blocks for each terminal, and the shaft constitutes a fixing shaft that fixes the plurality of terminal blocks to each other.
That is, in the present embodiment, the primary side terminal portion 11 and the secondary side terminal portion 12 of the terminal block are formed as independent terminal blocks for each terminal, and the shafts of the 8-block terminal blocks are mutually connected. A fixing shaft 30k to be fixed is configured. Also in this case, a heat pipe is provided as a heat conductive fixing shaft 30k immediately below the separating portion 13.

  Each terminal block has a through groove 13M0 penetrating the region between the primary and secondary side terminal portions directly under the separating portion 13, and a shaft 30 made of a heat pipe is inserted into each through groove 13M0 so as to be integrated. The temperature sensor unit 20S is attached to the end.

  According to such a configuration, the heat pipe is also used as the fixed shaft, the number of components can be reduced, and a heat pipe having both fixing and thermal contact can be realized.

DESCRIPTION OF SYMBOLS 10 Terminal block main body 10s Bulkhead 11 Primary side terminal part 11a Terminal screw 11b Base 12 Secondary side terminal part 12a Terminal screw 12b Base 13 Separate part 14 Support plate 14a Support plate main body 14b Mounting protrusion 14c Screw 14d External connection terminal part 15 Terminal board 20 Thermal fuse unit 20S Temperature sensor unit 23 Thermal fuse 23S Temperature sensor 100 Terminal block 30 Shaft (heat pipe)
30K fixing shaft (heat pipe)

Claims (7)

A primary side terminal connected to the primary side terminal;
A secondary terminal portion connected to the secondary terminal;
A thermally conductive shaft that is proximate to at least one of the primary-side terminal portion or the secondary-side terminal portion and that is provided in the entire width along the terminal arrangement direction, and a temperature-sensitive portion connected to the shaft. Terminal block provided. The terminal block according to claim 1,
The temperature sensor is a terminal block that is a thermal fuse. The terminal block according to claim 2,
The shaft is a heat pipe;
The thermal fuse is a terminal block provided at one end of the shaft. The terminal block according to claim 3,
A separate part for separating the primary side terminal part and the secondary side terminal part;
The heat pipe is a terminal block disposed over a region corresponding to the entire width of the separate portion. The terminal block according to claim 3 or 4,
The heat pipe is a terminal block disposed over a region corresponding to the full width below the separate portion. The terminal block according to claim 4 or 5,
The primary terminal portion and the secondary terminal portion are formed as independent terminal blocks for each terminal,
The terminal block which comprises the shaft for fixation in which the said shaft fixes the said several terminal block mutually.   The power distribution apparatus containing the terminal block of any one of Claims 1 thru | or 6.

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