JP2007213853A - Terminal device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a terminal device capable of rapidly and easily connecting a conductive wire. <P>SOLUTION: This terminal device is provided with a terminal surface having a screw hole for screwing a screw therein, and a groove part formed by recessing a part of the inside surface of the screw hole. When the conductive wire is crimped to the terminal surface by the screw, the conductive wire is inserted into the groove part before the conductive wire is wound around the screw. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a terminal device.

  As a terminal device having a terminal electrically connected to a conductive wire, for example, a terminal block used for electric wiring is known. The terminal block electrically connects the input cable and the output cable. For example, in a distribution board at a substation, an input cable to which the bus voltage from the voltage transformer is applied and an output cable to apply the bus voltage to a plurality of circuits (for example, a measurement circuit and a protection circuit) in the distribution board are electrically connected. A terminal block to be connected to is used.

  The terminal block is provided with an input terminal surface to which the input cable is connected and an output terminal surface to which the output cable is connected. And when connecting an input cable or an output cable to a terminal block, the crimp terminal for fixing each cable to the corresponding input terminal surface or output terminal surface is used (for example, refer patent document 1).

Hereinafter, a terminal block using a conventional terminal device will be described.
FIG. 11 is a perspective view showing an example of a terminal block using a conventional terminal device. Moreover, FIG. 12 is sectional drawing which shows an example of the terminal block using the conventional terminal device. As shown in FIG. 11, along each side of the terminal block, the x direction, the y direction, and the z direction are set, and the direction of the arrow is the + side, and the opposite side is the − side.

  The terminal block 10 is formed of, for example, a rectangular parallelepiped, and a plurality of input terminal surfaces 14 (conductors) and a plurality of output terminal surfaces 16 (conductors) are provided in the z direction on the surface F on the y-direction side. (Vertical direction). For example, an input cable (not shown) to which a bus voltage from a voltage transformer is applied is connected to the input terminal 14, and an output cable 4 that outputs the bus voltage to, for example, a measurement circuit or a protection circuit is connected to the output terminal 16. Is connected.

  Further, the input terminal surface 14 and the output terminal surface 16 adjacent to each other in the x direction are electrically connected within the terminal block 10 by, for example, a conductive wire (not shown).

  The screw hole 12 is provided in the output terminal 16 so as to be screwed with the screw 20b (male screw). A similar screw hole (not shown) is provided on the input terminal surface 14 so as to be screwed with the screw 20a (male screw).

  In the terminal block 10, the connection method is the same when an input cable (not shown) is connected to the input terminal surface 14 and when the output cable 4 is connected to the output terminal surface 16. Therefore, in the following description, only the case where the output cable 4 is connected to the output terminal surface 16 will be described.

  The output cable 4 electrically connects a circuit (not shown) (for example, a measurement circuit or a protection circuit) and the output terminal surface 16 of the terminal block 10. The output cable 4 has a core wire 4a, a covering 4b, and a jacket 4c. The core wire 4 a is a conductive wire (for example, a copper wire) at the center of the output cable 4. The coating 4b is an insulator that covers the outside of the core wire 4a, and the outer cover 4c is an insulator that covers the outside of the coating 4b. In addition, as shown in FIG. 11, the coating | coated 4b and the jacket 4c of the edge part of the output cable 4 in the side by which the connection with the terminal block 10 are peeled off to the predetermined position so that the core wire 4a may be exposed.

  The crimp terminal 6 is a round conductor having an opening in the center, for example. The crimp terminal 6 has a cylindrical portion 6 a that is joined to the output cable 4 at a part of the outer periphery of the crimp terminal 6. The crimping terminal 6 and the output cable 4 are joined by caulking the cylindrical part 6a with a crimping tool (not shown) in a state where the core 4a of the output cable 4 is inserted into the cylindrical part 6a of the crimping terminal 6.

As shown in FIGS. 11 and 12, to connect the output cable 4 to the output terminal surface 16, the screw 20 b is screwed into the screw hole 12 of the output terminal 16 through the opening of the crimp terminal 6. Then, since the crimp terminal 6 is fixed to the output terminal surface 16, the output cable 4 and the output terminal surface 16 are electrically connected via the crimp terminal 6.
Japanese Patent Laid-Open No. 9-7654

  In the terminal block 10, a crimp terminal 6 is fixed to one end of an input / output cable such as an input cable (not shown) and an output cable 4 connected to the terminal block 10. In order to fix the crimp terminal 6 to the input / output cable, it is necessary to caulk the cylindrical portion 6a, which requires time and labor. Thus, the conventional terminal device has a problem that the input / output cable cannot be connected quickly and easily.

  Further, in order to fix the crimp terminal 6 to the input / output cable, for example, an operator uses the crimping tool to caulk the cylindrical portion 6a, and thus the caulking strength varies. Therefore, there is a problem that, for example, the core wire 4a of the output cable 4 may come off from the cylindrical portion 6a when it is not crimped with sufficient strength to connect the input / output cable.

  This invention is made | formed in view of this subject, The place made into the objective is to provide the terminal device which can connect a conductive wire rapidly and easily.

  The invention for solving the above-mentioned problem comprises a terminal surface having a screw hole into which a screw is screwed, and a groove portion in which a part of the inner peripheral surface of the screw hole is recessed, and the groove portion has a conductive wire. When the screw is crimped to the terminal surface, the conductive wire is inserted before being wound around the screw. Since it is not necessary to use a crimp terminal when connecting the conductive wires, the conductive wires can be connected quickly and easily.

  Moreover, in such a terminal device, it is preferable that the surface of the groove has a pointed shape for making it difficult to pull out the conductive wire. Since the conductive wire and the apex of the pointed shape are in contact with each other, the conductive wire can be hardly pulled out.

  Furthermore, in such a terminal device, the pointed shape may be a sawtooth shape. Since the direction in which the conductive wire is pulled out is caught by the apex of the sawtooth, the conductive wire can be further prevented from being pulled out.

  In the terminal device, it is preferable that the conductive wire inserted into the groove is pressure-bonded between the screw and the groove by screwing the screw into the screw hole. The conductive wire can be easily fixed to the terminal surface by pressing the conductive wire between the screw and the groove.

  In the terminal device, the direction of the groove may be a screwing direction of the screw. Even if the conductive wire is wound around the screw in any direction (clockwise or counterclockwise as viewed from the head side of the screw), the conductive wire can be hardly pulled out.

  Moreover, in such a terminal device, the direction of the groove portion may be a direction that intersects the screwing direction of the screw. When the direction in which the conductive wire is wound is predetermined in one direction, a direction (for example, FIG. 3B) that makes an acute angle with respect to the direction in which the conductive wire is wound (for example, the + z direction in FIG. 3B). If the groove is provided in the y-direction (inclined in the direction y), it is effective to make it difficult to remove the conductive wire.

  Moreover, in this terminal device, it is preferable that there are a plurality of the groove portions. By providing a plurality of grooves, a plurality of conductive lines can be connected to one terminal surface. Conventionally, when a plurality of conductive wires are connected to one terminal surface, crimp terminals are provided on the plurality of conductive wires, and the plurality of crimp terminals are overlapped and fixed to the terminal surface with screws. Therefore, the screw tightening may be weaker than when one crimp terminal is fixed to one terminal surface. When the screw tightening is weak, a plurality of crimp terminals are separated from each other to cause poor contact. Could occur. Since the crimping terminal is not used in the terminal device of the present invention, contact failure can be eliminated when a plurality of conductive wires are provided on one terminal surface.

  In the terminal device, it is preferable that the sizes of the plurality of grooves are different. By providing the groove portions having different sizes, conductive wires having different wire diameters can be connected to one terminal surface.

  In the terminal device, the conductive wire is preferably a cable core. When the terminal device is applied to the terminal block, the core wires of the input / output cables can be connected quickly and easily.

  According to the present invention, conductive wires can be connected quickly and easily.

  At least the following matters will become apparent from the description of the present specification and the accompanying drawings. In this embodiment, a case where the terminal device of the present invention is applied to a terminal block will be described.

=== Configuration of Terminal Device ===
FIG. 1 is a perspective view showing an example of a terminal block using a terminal device according to an embodiment of the present invention. FIG. 2 is a cross-sectional view taken along the line AA ′ of FIG. As shown in FIG. 1, along each side of the terminal block, the x direction, the y direction, and the z direction are set, and the direction of the arrow is the + side, and the opposite side is the − side.

  The terminal block 100 of the present invention is formed in, for example, a rectangular parallelepiped, and a plurality of input terminal surfaces 140 and a plurality of output terminal surfaces 160 are respectively along the z direction (vertical direction) on the −y side surface F. (FIG. 1 shows one portion of the plurality of input terminal surfaces 140 and the plurality of output terminal surfaces 160 adjacent to each other in the x direction). For example, an input cable (not shown) to which a bus voltage from a voltage transformer (not shown) is applied is connected to the input terminal surface 140, and a plurality of output terminal surfaces 160 are connected to, for example, a measurement circuit or a protection circuit. An output cable 40 that outputs a bus voltage is connected.

  Further, the input terminal surface 140 has a screw hole 120 into which a screw 200a (male screw) is screwed, and the output terminal surface 160 has a screw hole 110 into which a screw 200b (male screw) is screwed. Yes.

  Furthermore, as shown in FIG. 2, the terminal block 100 using the terminal device of the present invention has a groove portion 112 in which a part of the inner peripheral surface of the screw hole 110 (for example, the x direction + side) is recessed. A part of the inner peripheral surface 120 (for example, the x-direction side) has a groove 122 that is recessed. Moreover, in the terminal block 100, the shaded portion shown in FIGS. 1 and 2 is formed of a conductor. The hatched portion of the screw hole 110 and the groove portion 112 constitutes the output terminal T2, and the hatched portion of the screw hole 120 and the groove portion 122 constitutes the input terminal T1. Further, for example, the + y side bottom surface S <b> 2 of the screw hole 110 and the + y side bottom surface S <b> 1 of the screw hole 120 are electrically connected by the conductive wire 130 inside the terminal block 100. In the terminal block 100, the portion other than the conductor is mainly resin (for example, phenol resin), and is integrally formed.

  In addition, the groove part 112 may be provided in parallel with the screwing direction (henceforth y direction) of the screw 200b, and may be provided in the direction which cross | intersects ay direction. Similarly, the groove 122 may be provided in parallel to the screwing direction (hereinafter referred to as y direction) of the screw 200a, or may be provided in a direction intersecting with the y direction.

  FIG. 3 is a side view of the groove portion 112 into which the core wire 40a is inserted in FIG. FIG. 3A shows a case where the groove 112 is provided in parallel to the y direction, and FIG. 3B shows a case where the groove 112 is provided in a direction intersecting with the y direction (obliquely in the y direction). Is. 3B, when the screw 200b is screwed into the screw hole 100, the core wire 40a is inserted into the groove portion 112. As a result, the screw 200b and the groove 112 are sandwiched.

  When the groove portion 112 is provided in parallel to the y direction as shown in FIG. 3A, the core wire 40a is similarly wound in the clockwise or counterclockwise direction around the screw 200b. It is possible to make it difficult to pass through the line 40a.

  In FIG. 3B, when the winding direction of the core wire 40a is set to the + z direction, when the screw 200b is tightened, as shown in FIG. If the groove part 112 is provided so that C (the angle between the winding direction and the groove part 112) is an acute angle, the core wire 40a can be made more difficult to pull out than in the case of FIG. In the present embodiment, the groove 112 is provided obliquely in the y direction as a direction intersecting the y direction. However, the groove 112 may be provided obliquely toward the x direction + side, for example. Even when the groove portion 112 is formed obliquely in the x direction, it is possible to make it difficult to pass through the core wire 40a.

  Further, the surface of the groove portion 112 facing the core wire 40a is provided with a sharp shape similar to the screw groove shape of the inner peripheral surface of the screw hole 110 as shown in FIG. Further, in the groove portion 122, a pointed shape similar to the screw groove shape of the inner peripheral surface of the screw hole 120 is similarly provided on the surface of the input cable facing the core wire (not shown). By making the surfaces of the grooves 112 and 122 pointed in this way, when the core wire of the input / output cable is inserted and the screws 200a and 200b are screwed together, the core wire contacts the apex of the pointed shape. It can be difficult to escape. In addition, in the groove parts 112 and 122, the sharp shape may be provided on all surfaces facing the core wire of the input / output cable, or on a part of the facing surfaces.

  Moreover, you may form the sharp shape in the groove part 112 and the groove part 122 in a sawtooth shape, for example. FIG. 4 is a cross-sectional view showing a case where a groove 115 having a serrated surface facing the core wire 40a is provided on the inner peripheral surface of the screw hole 110. FIG. Thus, in the case of the sawtooth shape, the direction in which the core wire is to be pulled out is the direction in which the top of the sawtooth shape is caught by the core wire, so that the cable core wire can be further prevented from being pulled out.

  In the terminal block 100 using the terminal device of the present invention, the configuration of the input terminal surface 140 side (hereinafter referred to as the input side) and the output terminal surface 160 side (hereinafter referred to as the output side) are the same. The output cable connection method is the same. Therefore, in the following description, only the output side will be described, and the description on the input side will be omitted.

  The output cable 40 electrically connects a circuit (not shown) (for example, a measurement circuit or a protection circuit) and the output terminal T2 of the output terminal surface 160. The output cable 40 includes a core wire 40a, a covering 40b, and a jacket 40c. The core wire 40a is a conductive wire (for example, a copper wire) at the center of the output cable 40. The coating 40b is an insulator that covers the outside of the core wire 40a, and the jacket 40c is an insulator that covers the outside of the coating 40b. In addition, as shown in FIG. 1, the covering 40b and the jacket 40c at the end of the output cable 40 on the side where the connection with the terminal block 100 is performed are peeled off to a predetermined position so as to expose the core wire 40a.

=== Cable connection ===
The connection between the terminal block and the cable using the terminal device of the present invention will be described with reference to FIGS. 2, 5, 6, and 7.

  FIG. 5 is a cross-sectional view for explaining a case where the output cable 40 is connected to the terminal block 100 using the terminal device of the present invention, and FIG. 6 is an output to the terminal block 100 using the terminal device of the present invention. It is a top view for demonstrating the case where the cable 40 is connected. FIG. 7 is a plan view showing a state in which the output cable 40 is connected to the terminal block 100 using the terminal device of the present invention.

  First, as shown in FIG. 2, the tip of the core 40a of the output cable 40 is inserted in the + y direction into the groove 112 provided in the screw hole 110 of the terminal block 100, and then the screw 200b is screwed into the screw hole 110. Let

  Then, as shown in FIG. 5, the core wire 40 a of the output cable 40 is sandwiched between the screw 200 b and the groove portion 112. Furthermore, the core wire 40a is sandwiched between the output terminal surface 160 and the head of the screw 200b. At this time, the core 40a may be in contact with the screw 200b and the groove 112, or may be pressure-bonded between the screw 200b and the groove 112, for example. When crimped, the core wire 40a can be connected more reliably.

  Then, the core 40a of the output cable 40 is wound around, for example, one turn around the screw 200, as shown in FIG. 6, from the beginning to the end of the tightening of the screw 200b.

  Thus, after the core wire 40a is wound around the screw 200, the screw 200 is further tightened, so that the core wire 40a is sandwiched between the screw 200b and the groove portion 112 as shown in FIG. At the same time, it is crimped between the output terminal T2 of the output terminal surface 160 and the screw 200b.

  Thus, the terminal block 100 using the terminal device of the present invention can quickly and reliably connect the core 40a of the output cable 40 to the output terminal T2 of the output terminal surface 160 without using a crimp terminal. . Similarly, the core wire (not shown) of the input cable can be quickly and reliably connected to the input terminal T1 of the input terminal surface 140.

  In the present embodiment, the groove portion 112 in which a part of the screw hole 110 is recessed is provided, but a part of the screw hole 110 may be cut out.

  FIG. 8 is a front view showing a case where a part of the screw hole 110 is cut out. The screw hole 110 shown in FIG. 8 is provided with a notch groove 222 in which a part of the screw hole 110 is notched. In the notch groove 222, a surface facing the core 40a may be provided with a sharp shape similar to the screw groove shape of the inner peripheral surface of the screw hole 110 as shown in FIG. By providing the pointed shape, when the core wire 40a is inserted and the screw 200a is screwed, the core wire 40a can be made difficult to come off by contacting the apex of the pointed shape. In this case, since the resin portion of the output terminal surface 160 is notched, the sharp shape is formed of resin.

  When connecting the output cable 4, the core wire 4 a of the output cable 4 is inserted into the notch groove 222, and the screw 200 b is screwed into the screw hole 110. Then, between the start of tightening of the screw 200b and the end of tightening, the core wire 4a is wound around the screw of the screw 200b, for example, once. Thereafter, the screw 200b is tightened. As a result, the core 4a is crimped to the output terminal T2 of the output terminal surface 160 and the screw 200b.

=== Other Embodiments ===
FIG. 9 is a front view showing a screw hole of a terminal block using a terminal device according to another embodiment of the present invention. Note that the same parts as those in FIG. The screw hole 310 shown in FIG. 9 is provided in the output terminal surface 160 to which the output cable 40 of the terminal block 100 is connected, for example. The screw holes 310 are provided with grooves 312a, 312b, 314a, 314b, 316a, and 316b at arbitrary positions.

In the groove portions 312a and 312b, the cross-sectional area of the hollow portion shown in the drawing has a predetermined value (for example, 3.5 mm ² ).
In the groove portions 314a and 314b, the cross-sectional area of the recessed portion shown on the paper surface is smaller than the predetermined value (for example, 2 mm ² ).
In the groove portions 316a and 316b, the cross-sectional area of the recessed portion shown on the paper surface is larger than the predetermined value (for example, 5 mm ² ).

By providing the groove portions 312a, 312b, 314a, 314b, 316a, and 316b having different sizes in the screw hole 310, it becomes possible to connect the output cable 40 regardless of the size of the cross-sectional area of the core wire 40a. Further, for example, two output cables 4 having a cross-sectional area of the core 40a of 2 mm ² may be connected to one groove 316a, for example. Moreover, you may make it connect the output cable 40 whose cross-sectional area of the core wire 40a is 2 mm < ² > to the groove part 314a and the groove part 314b, respectively.

  Further, each of the surfaces of the groove portions 312a, 312b, 314a, 314b, 316a, and 316b facing the core wire 40a has a sharp shape similar to the screw groove shape of the inner peripheral surface of the screw hole 310, for example, as in FIG. It may be provided.

  As described above, when the groove portions 312 a, 312 b, 314 a, 314 b, 316 a, and 316 b are provided in the screw hole 310, a plurality of output cables 40 can be connected to one screw hole 310. Furthermore, the output cable 40 can be connected regardless of the size of the cross-sectional area of the core wire 40a.

  In the present embodiment, the groove portions 312a, 312b, 314a, 314b, 316a, and 316b in which the screw hole 310 is recessed are provided.

  FIG. 10 is a front view showing a case where the screw hole 310 is cut out. Notch grooves 322a, 312b, 324a, 324b, 326a, and 326b are provided at positions corresponding to the groove portions 312a, 312b, 314a, 314b, 316a, and 316b, respectively. As described above, even when the plurality of cutout grooves 322 a, 312 b, 324 a, 324 b, 326 a, 326 b are provided, the plurality of output cables 40 can be connected to one screw hole 310. Further, the notch grooves 322a, 312b, 324a, 324b, 326a, 326b may be provided with a sharp shape, respectively. In this case, the pointed shape is formed of resin as in FIG.

  In this embodiment, the case where the terminal device is applied to the terminal block has been described. However, the terminal device of the present invention can be electrically connected to the conductive wire by screwing the screw into the screw hole in addition to the terminal block. It can be applied to a device having a terminal.

  As described above, the terminal device of the present invention can quickly and reliably connect the conductive wires. For example, when the terminal device of the present invention is applied to a terminal block, there is no need to provide a crimp terminal on the core of the input / output cable, and the input / output cable can be connected quickly and reliably.

  The above-described embodiment is intended to facilitate understanding of the present invention, and is not intended to limit the present invention. The present invention is changed and improved without departing from the gist thereof, and the present invention includes equivalents thereof.

It is a perspective view for demonstrating the terminal block using the terminal device which concerns on embodiment of this invention. It is sectional drawing for demonstrating the terminal block using the terminal device which concerns on embodiment of this invention. It is a side view for demonstrating the terminal block using the terminal device which concerns on embodiment of this invention. FIG. 3A shows a case where the groove is provided in parallel to the y direction, and FIG. 3B shows a case where the groove is provided in a direction crossing the y direction. It is sectional drawing which shows the case where the groove part of the terminal device which concerns on embodiment of this invention is made into a sawtooth shape. It is sectional drawing for demonstrating the case where a cable is connected to the terminal device of this invention. It is a top view for demonstrating the case where a cable is connected to the terminal device of this invention. It is a top view for demonstrating the case where a cable is connected to the terminal device of this invention. It is a front view which shows the case where a screw hole is notched. It is a front view for demonstrating the terminal device concerning other embodiment of this invention. It is a front view which shows the case where a screw hole is notched. It is a top view for demonstrating the terminal block using the conventional terminal device. It is sectional drawing for demonstrating the terminal block using the conventional terminal device.

Explanation of symbols

10, 100 Terminal block 4, 40 Output cable 4a, 40a Core wire 4b, 40b Cover 4c, 40c Jacket 6 Crimp terminal 6a Tube portion 12, 110, 120 Screw hole 14, 140 Input terminal surface 16, 160 Output terminal surface 20a 20b Screw 112, 122 Groove 130 Conductive wire 200a, 200b Screw 222 Notch groove 312a, 312b Groove 314a, 314b Groove 316a, 316b Groove 322a, 322b Notch groove 324a, 324b Notch groove T 326a, 326b Input terminal T2 T1

Claims (9)

A terminal surface having a screw hole into which the screw is screwed;
A groove portion in which a part of the inner peripheral surface of the screw hole is recessed,
The groove is
When the conductive wire is crimped to the terminal surface with the screw, the terminal device is inserted before the conductive wire is wound around the screw.   2. The terminal device according to claim 1, wherein the surface of the groove has a pointed shape for making it difficult to pass through the conductive wire.   The terminal device according to claim 2, wherein the pointed shape is a sawtooth shape.   4. The conductive wire inserted into the groove is pressed between the screw and the groove when the screw is screwed into the screw hole. 5. The terminal device as described.   The terminal device according to claim 1, wherein a direction of the groove is a screwing direction of the screw.   The terminal device according to claim 1, wherein a direction of the groove portion is a direction intersecting with a screwing direction of the screw.   The terminal device according to claim 1, wherein there are a plurality of the groove portions.   The terminal device according to claim 7, wherein the plurality of groove portions have different sizes. The terminal device according to claim 1, wherein the conductive wire is a cable core.

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