JP2020080253A - Branch terminal block - Google Patents

Abstract

To provide a branch terminal block capable of easily connecting a branch wire to a copper bar.SOLUTION: A branch terminal block includes: a narrow metal fitting 11 nipping a copper bar 2; and an electric wire connection part 12 coupled to the narrow metal fitting 11. By nipping a side part of the copper bar 2 with the narrow metal fitting 11, a state is held. By connecting an electric wire 3 to the electric wire connection part 12, the electric wire 3 is connected to the copper bar 2. The electric wire connection part 12 includes: a terminal seat 13 connected to the narrow metal fitting 11; and a screw 14 causing a crimp terminal 4 to be attached to the electric wire 3 adhering the terminal seat 13.SELECTED DRAWING: Figure 1

Description

  TECHNICAL FIELD The present invention relates to a branching terminal block used when connecting an electric wire for branching to a copper bar arranged in a distribution board or the like.

A copper bar is mainly used as the main electric path arranged on the secondary side of the main breaker of the distribution board, and a branch breaker or the like is connected to the copper bar to form a plurality of branch circuits. By forming the secondary side electric path with a copper bar, a sufficient current capacity can be secured and a large number of branch breakers can be easily connected.
In the configuration in which such copper bars are arranged, as disclosed in Patent Document 1, the copper bars are individually arranged in the vertical direction in the width direction, that is, the copper bars are arranged in the direction orthogonal to the assembled surface. is there. By vertically arranging in this way, the breaker with the plug-in type connection terminal on the bottom surface can be connected to the copper bar by a simple operation of pushing it from above, and the current capacity can be secured. It is used as an electric circuit to connect a large breaker.

JP, 2007-311245, A

As mentioned above, copper bars are widely adopted as the main circuit, making it easy to connect the breaker.However, if you want to branch the circuit to equipment other than the breaker, you can screw the wires to the copper bar. A hole was provided, and the electric wire was screwed to connect the electric wire.
FIG. 7 shows a state in which the branch breaker 5 is attached to the three copper bars 6 which are vertically arranged and assembled as described above, and the copper bar 6 has a configuration in which holes 6a for screwing branch wires are provided. Shows. As shown in FIG. 7, since the holes 6a provided in the vertically arranged copper bars 6 are oriented horizontally, the work of tightening the electric wire with the screws 7 and the bolts 8 is troublesome, and the copper 6 having no holes 6a is required. The bar 6 had to be started by drilling holes, and the work of branching the wires was troublesome.

  Therefore, in view of such problems, an object of the present invention is to provide a branching terminal block that can easily connect a branching wire without making a hole in a copper bar.

In order to solve the above-mentioned problems, a branching terminal block according to the invention of claim 1 has a holding metal fitting for holding a copper bar, and an electric wire connecting portion connected to the holding metal fitting, and the holding metal fitting of the copper bar By sandwiching the side portions, the electric wire connected to the electric wire connecting portion is connected to the copper bar.
According to this configuration, the electric wire can be connected to the copper bar only by holding the side portion of the copper bar. Therefore, even if the copper bar is not provided with a hole for screwing the electric wire, and without performing a screwing operation on the copper bar, branch wiring can be performed from the copper bar by a simple operation.

According to a second aspect of the present invention, in the configuration according to the first aspect, the electric wire connecting portion includes a washer connected to the holding metal fitting, and a screw for closely attaching the terminal metal fitting attached to the electric wire to the washer. To do.
According to this configuration, since the electric wire is connected to the copper bar via the terminal fitting, the connection resistance can be reduced and the electric wire can be connected in a stable state.

According to a third aspect of the present invention, in the structure according to the first aspect, the holding metal member has a copper bar holding portion formed downward, and the wire connecting portion has a box-shaped housing on an upper portion of the holding metal member. Has at least one insertion hole formed on the top surface of the housing for inserting an electric wire from above, and is inserted into the inside of the housing from the insertion hole and the connection metal fitting that is connected to the holding metal fitting and is erected in a wall shape. A pressure contact spring that presses the connected electric wire against the connecting metal fitting is arranged, and the electric wire inserted into the insertion hole is pressed by the pressure contact spring and connected to the holding metal fitting.
According to this configuration, the electric wire can be directly connected without using the terminal fitting. Since the wire is inserted in the same direction as the branch terminal block is connected to the copper bar, the wire can be easily inserted even when the branch terminal block is mounted on the copper bar.

  According to the present invention, the electric wire can be connected to the copper bar only by pinching the side portion of the copper bar. Therefore, even if the copper bar is not provided with a hole for screwing the electric wire, and without performing a screwing operation on the copper bar, branch wiring can be performed from the copper bar by a simple operation.

An example of the branching terminal block which concerns on this invention is shown, (a) is a perspective view, (b) is a front view. It is a perspective view of the terminal block for branches which attached the blocking plate. Other forms are shown, (a) is a perspective view and (b) is a front view. FIG. 4 is a perspective view in which a blocking plate is attached to the branching terminal block of FIG. 3. It is explanatory drawing which attached the terminal block for branching to the copper bar. It is explanatory drawing which shows the other form of a branching terminal block, (a) is a side surface explanatory drawing which shows an internal structure, (b) is a perspective view which attached the obstruction board. It is explanatory drawing which attached the breaker to the copper bar arrange|positioned vertically.

  Hereinafter, embodiments embodying the present invention will be described in detail with reference to the drawings. 1 and 2 show an example of a branching terminal block according to the present invention. FIG. 1A is a perspective view, FIG. 1B is a front view, and FIG. 2 is a perspective view with a blocking plate attached. As shown in FIG. 1, the branching terminal block 1 has a rectangular parallelepiped housing 9, in which a holding metal fitting 11 for holding the copper bar 2 and a wire connecting portion 12 are arranged.

The holding metal fitting 11 is arranged in an open lower portion of the housing 9, and is formed in a U shape so as to hold the side portion of the copper bar 2 arranged in the front-rear direction, and the holding portion is formed downward. ing. The inserted copper bar 2 is clamped by utilizing the elasticity of the metal, and the tip of the clamp metal fitting 11 is curved inward so that the position of the branch terminal block 1 is fixed by the clamp.
The electric wire connecting portion 12 has a flat terminal seat 13 which is continuously formed on the holding metal fitting 11 and is bent and arranged above the holding metal fitting 11. A screw hole 13a is provided in the center of the terminal seat 13, and the screw 14 is screwed into the screw hole 13a to connect the electric wire 3 to the terminal seat 13.
A crimp terminal 4 is attached to the electric wire 3, and the crimp terminal 4 is press-contacted with the terminal seat 13 by a screw 14 to be connected thereto.

The housing 9 has a lower part opened in the front-rear direction in addition to the lower part, so that the copper bar 2 can be inserted. An insertion hole 15 for inserting the crimp terminal 4 is formed on the side surface, and an operation hole 16 for operating the screw 14 is provided on the top surface. Then, as shown in FIG. 2, the open front surface is closed by the closing plate 10. The closing plate 10 is attached to prevent intrusion of dust and the like.
Although the back surface of the housing 9 is closed, an opening may be formed to close the housing 9 with the closing plate 10 like the front surface.

In this way, the electric wire 3 can be connected to the copper bar 2 only by holding the side portion of the copper bar 2. Therefore, even if the hole 2a for screwing the electric wire 3 is not provided in the copper bar 2, the branching wiring from the copper bar 2 can be performed by a simple operation without screwing the copper bar 2. You can
Then, by using the crimp terminal 4 which is the terminal fitting, the connection resistance can be reduced and the connection can be performed in a stable state.

3 and 4 show another example of the branching terminal block 1, (a) is a perspective view, (b) is a front view, and FIG. 4 is a perspective view with a blocking plate attached.
The connecting portion with the copper bar 2 has a holding metal fitting 11 for holding the copper bar 2 arranged in the front-rear direction similarly to the above-described embodiment, but the connection form with the electric wire 3 is different, and the crimp terminal 4 is connected. The electric wire 3 is directly connected without using.
The electric wire connecting portion 12 has an electric wire insertion hole 21 on the top surface of a rectangular parallelepiped housing 9a, and a plate-like connecting metal fitting 31 connected to the holding metal fitting 11 is arranged upright in a wall shape so as to face left and right. .. A spring plate 32 is arranged in the center between the connecting fittings 31 so that the electric wire 3 inserted from the wire insertion hole 21 is brought into close contact with the connecting fitting 31 by the elasticity of the spring plate 32.

The spring plate 32 has a fixing portion 32a that is bent in a U-shape and protrudes upward in the center, and has downward slopes on the left and right, and is formed by bending in a V shape. A fixing member 33 having a substantially triangular shape is arranged at the center of the wire connecting portion 12, and the fixing portion 32a is held by the recess 22 provided in the upper portion of the housing 9a and the fixing member 33, and the spring plate 32 is fixed. ing.
In this way, the electric wire connecting portion 12 is formed symmetrically, and the electric wire insertion holes 21 are provided at a total of four places with respect to the left and right connecting fittings 31, respectively, so that a maximum of four electric wires 3 can be connected.
As in the case of the above embodiment, the open front surface is closed by the closing plate 10a as shown in FIG. Further, 3a is a core wire from which the coating of the electric wire 3 is peeled off.

FIG. 5 is an explanatory diagram in which the branching terminal block 1 is attached to a copper bar 2. 1a is a terminal block for connecting an electric wire 3 by using a crimp terminal 4, and 1b is a terminal to which the electric wire 3 is directly inserted and connected. It is a stand. As shown in FIG. 5, the electric wire 3 can be easily connected by a sliding operation of inserting and sandwiching the side portion of the copper bar 2.
In addition, M1 and M2 show the form of conventional branch wiring, M1 is a form in which a screw 7 is inserted into the hole 2a of the copper bar 2 to connect an electric wire, and M2 is a copper bar using a bolt 8. The form which connects an electric wire is shown.

In this way, since the electric wire 3 inserted from above can be directly connected, the wiring can be branched from the copper bar 2 by a simple operation. Further, since the inserting direction of the electric wire 3 is the same as the direction in which the branching terminal block 1 is connected to the copper bar 2, the branching terminal block mounted on the copper bar 2 is not required to separately hold and operate the branching terminal block 1. The electric wire 3 can be easily inserted into 1.
Then, the electric wire 3 can be connected to the copper bar 2 simply by holding the side portion of the copper bar 2, and even if the hole 2a for screwing the electric wire 3 is not provided in the copper bar 2, It is possible to perform branch wiring from the copper bar 2 by a simple operation without screwing the copper bar 2.

  FIG. 6 shows still another example of the terminal block 1 for branching, and shows another mode in which the electric wire 3 is connected using the crimp terminal 4. FIG. 6A is a side explanatory view showing the internal structure of the branching terminal block 1, and FIG. 6B is a perspective explanatory view with a closing plate attached. The insertion direction of the electric wire 3 is different from that in FIG. ing. The details will be described below. However, the same components as those in FIG.

The configuration in which the holding metal fitting 11 for holding the copper bar 2 is provided below and the electric wire connecting portion 12 is provided in the upper portion is similar to that of FIG. 1, but the terminal seat 13 formed continuously from the holding metal fitting 11 is A screw 14 that is arranged vertically and that makes the crimp terminal 4 adhere to the terminal seat 13 is arranged in the front-rear direction, and is configured to be screwed from the front.
Therefore, an insertion hole 15 for inserting the crimp terminal 4 is provided on the top surface of the housing 9b. Further, an operation hole 16 for operating the screw 14 is provided in the closing plate 10b that closes the opened front surface of the housing 9b.
In this way, the crimp terminal 4 connected to the electric wire 3 may be inserted from above, and the same effect as that of the branching terminal block 1 having the structure shown in FIG. 1 can be obtained.

  In addition, although the said embodiment demonstrated the structure which arranged the width direction of the copper bar 2 vertically, the structure which laminated|stacked the some copper bar 2 in the up-down direction orthogonal to a mounting surface so that the width direction may be set sideways. The branching terminal block 1 of the present invention can be applied to the above. As long as there is a space for inserting the lower ends of the housings 9, 9a, 9b between the copper bars 2, the branch terminal block 1 can be laterally connected to the copper bars 2.

  1... Branching terminal block, 2... Copper bar, 4... Crimping terminal (terminal fitting), 9, 9a, 9b... Housing, 10a, 10b... Closing plate, 11... Holding fitting, 12 ..Electric wire connection part, 13..Terminal washer (washer), 14..screw, 21..electric wire insertion hole, 31..connecting metal fitting, 32..spring plate (pressure contact spring)

Claims (3)

A holding metal member for holding the copper bar, and an electric wire connecting portion connected to the holding metal member,
A terminal block for branching, wherein an electric wire connected to the electric wire connecting portion is connected to the copper bar by holding a side portion of the copper bar by the holding metal fitting.   The branching terminal block according to claim 1, wherein the wire connecting portion includes a washer connected to the holding metal fitting, and a screw for closely fitting a terminal metal fitting attached to the wire to the washer. The sandwiching metal is formed with a sandwiching portion of the copper bar facing downward, and the wire connecting portion is formed by having a box-shaped housing on an upper portion of the sandwiching metal,
At least one insertion hole for inserting an electric wire from above is provided on the top surface of the housing,
Inside the housing, a connecting metal fitting that is connected to the sandwiching metal and is arranged upright in a wall shape,
A pressure contact spring for pressing the electric wire inserted from the insertion hole against the connecting fitting is arranged,
The branch terminal block according to claim 1, wherein the electric wire inserted into the insertion hole is pressed by the pressure contact spring to be connected to the holding metal fitting.

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