JP2000243473A - Pillar terminal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pillar terminal capable of holding an electric wire with sufficient strength not only when a solid wire is used as the electric wire but when a stranded wire is used as the electric wire. SOLUTION: An electric wire is sandwiched between an end face 2a of a terminal screw 2 and a terminal plate 3 partly inserted in a terminal frame 1 by screwing the terminal screw 2 into a screw hole 1a bored through an upper part of the ring-shaped terminal frame 1. The end face 2a is protrusively curved, and an arcuate hold surface 3a with a cross-section along an opening surface of the terminal frame 1 running along the end face 2a is formed on a surface of the terminal plate 3 confronting the end face 2a. Even in cases where a stranded wire is used as the electric wire, the strands of the stranded wire can be sandwiched between the end face 2a and the hold surface 3a.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a terminal screw which is screwed into a threaded hole formed in a peripheral wall of an annular terminal frame to hold an electric wire between the peripheral wall of the terminal frame and a tip end surface of the terminal screw. Accordingly, the present invention relates to a pillar terminal for mechanically holding and electrically connecting an electric wire.

[0002]

2. Description of the Related Art Conventionally, a terminal screw is screwed into a screw hole provided through a peripheral wall of an annular terminal frame, and an electric wire is sandwiched between the peripheral wall of the terminal frame and a tip end surface of the terminal screw. A so-called pillar terminal for mechanically holding and electrically connecting an electric wire is known.

[0003] Some terminal frames of pillar terminals are formed by cutting, but there is a problem that the material is wasted and the cost is increased. So, for example,
As described in Japanese Patent Publication No. 22186 and Japanese Utility Model Publication No. 1-41166, a pillar terminal that forms an annular terminal frame by bending a sheet metal has been proposed.

As shown in FIG. 17, a pillar terminal disclosed in Japanese Utility Model Laid-Open Publication No. 54-22186 is a terminal formed by bending a sheet metal into a rectangular cross section and connecting a central portion of a lower piece 20b. A frame 20 is provided. Terminal frame 20
A screw hole 20c is formed through the upper piece 20a, and an electric wire is sandwiched between a distal end surface 21a of a terminal screw 21 screwed into the screw hole 20c and a terminal plate 22 inserted into a lower portion of the terminal frame 20. It has become so.

On the other hand, in the pillar terminal described in Japanese Utility Model Publication No. 1-41166, as shown in FIG. 18, a sheet metal is bent into a rectangular cross section, and a bottom upper piece 30a and a bottom lower piece 30b are overlapped. The terminal upper piece 30a and the bottom lower piece 30b are joined by a fixing screw 32 for fixing the terminal plate 31 to the bottom of the terminal frame 30. A screw hole 30c extends through the upper surface of the terminal frame 30, and an electric wire is sandwiched between the tip surface 33a of the terminal screw 33 screwed into the screw hole 30c and the bottom upper piece 30a.

[0006]

However, the pillar terminals described in the above two publications are mainly used when a single core wire is used as an electric wire, and the terminal screw 2
Since the mating side surface between which the wire is sandwiched between the wires 1 and 33 is flat, if a stranded wire is to be used as the wire, the strands of the stranded wire will spread when the terminal screws are tightened, and the wire will have sufficient strength. Cannot be held.

The present invention has been made in view of the above circumstances, and has as its object to hold a wire with sufficient strength not only when a single core wire is used as a wire but also when a stranded wire is used as a wire. It is to provide a pillar terminal which can be used.

[0008]

According to a first aspect of the present invention, there is provided a terminal frame formed into an annular shape by bending a sheet metal and joining ends thereof, and a terminal frame which is provided at a position on a peripheral wall of the terminal frame and extends outside the peripheral edge. A terminal screw screwed into a screw hole having a counter sink on the side surface and a terminal screw having a convex curved end surface, the terminal plate being formed at one end of the sheet metal forming the terminal frame so that the distal end is closer to the base. Also, by mating the widened connecting protrusion and the connecting recess formed at the other end, the ends of the sheet metal are unevenly connected to each other, and a portion for holding the electric wire between the end surface and the terminal screw. A cross section along the opening face of the terminal frame is curved in the same direction as the tip face of the terminal screw, and a holding face is formed in which the distance from the tip face of the terminal screw at the intermediate portion is set to be equal to or greater than the distance at both ends. Is what it is. According to this configuration, since the terminal frame is formed of sheet metal, compared to a case where the terminal frame is formed by cutting, there is no waste of material and the manufacturing is easy, and the terminal screws are screwed. Since the countersink is provided in the screw hole to be combined, it is possible to increase the screwing amount between the terminal frame and the terminal screw as compared with the case where the countersink is not provided,
Terminal screws can be securely tightened. The tip surface of the terminal screw is a convex curved surface, and the holding surface facing the tip surface of the terminal screw is curved in the same direction as the tip surface of the terminal screw, and the distance from the tip surface of the terminal screw at the intermediate portion is both ends. Since the distance is set to be equal to or greater than the distance in the part, not only when a single core wire is used as the electric wire, but also when a stranded wire is used as the electric wire, the strand of the stranded wire is difficult to spread, and is sandwiched between the terminal screw and the holding surface. It becomes possible.

According to the second aspect of the present invention, since the connecting projections are substantially T-shaped, the ends are not separated from each other even if a force is applied to separate the ends of the sheet metal. However, it is possible to obtain a terminal frame having high strength.

According to a third aspect of the present invention, in the second aspect of the present invention, when the electric wire is sandwiched between the terminal screw and the holding surface, the portion where the coupling convex portion and the coupling concave portion are unevenly coupled is provided. The force acting when the terminal screws are tightened acts in the direction to separate the ends of the sheet metal, preventing the ends of the terminal frame from being separated by the tightening of the terminal screws. It can be prevented more reliably.

According to a fourth aspect of the present invention, in the third aspect of the present invention, the end face of the sheet metal is formed along the axis of the terminal screw on the side of the convex portion. A first engagement surface for preventing opening of the coupling recess due to a force acting from the coupling convex portion when tightening, and a movement for pulling the coupling convex portion out of the coupling concave portion along the axis of the terminal screw. And a locking surface that is inclined from the base side of the coupling projection toward the opening side of the terminal frame so as to approach the distal end of the coupling projection. According to this configuration, even when the terminal screw is strongly tightened, opening of the coupling recess is prevented, and as a result, the electric wire can be firmly held.

According to a fifth aspect of the present invention, in the first to fourth aspects of the present invention, there is provided a terminal plate partially inserted between a tip end surface of the terminal screw and an inner peripheral surface of the terminal frame. Since the holding surface is formed on the surface facing the distal end surface of the terminal screw in (1), it is not necessary to form the holding surface on the terminal frame, and the shape of the terminal frame is simplified.

According to a sixth aspect of the present invention, in the first to fifth aspects of the present invention, the gap between the inner peripheral surface of the terminal frame and the side surface of the terminal screw is larger than the diameter of a strand of a stranded wire used as an electric wire. Because the setting is small, when the stranded wire is sandwiched between the terminal screw and the holding surface, the strand of the stranded wire gets caught between the inner peripheral surface of the terminal frame and the terminal screw and clings to the terminal screw Can be prevented, and the wire can be prevented from being broken when the terminal screw is tightened.

According to a seventh aspect of the present invention, in the first to sixth aspects of the present invention, a part of the terminal frame is cut and raised at a portion of the terminal frame facing the front end face of the terminal screw and the opening surface of the terminal frame is formed. The receiving piece is formed such that the cross section along the terminal screw has a shape along the distal end surface of the terminal screw. According to this configuration, when the terminal plate is provided, the terminal plate can be brought into close contact with the receiving piece, the strength of holding the electric wire between the terminal screw and the terminal plate is increased, and the terminal plate is not provided. Even in this case, the electric wire can be firmly held between the terminal screw and the receiving piece.

According to an eighth aspect of the present invention, in the first to sixth aspects, the holding surface is a peripheral surface of a single-core core wire to be connected to a central portion in a cross section along the opening surface of the terminal frame. , And a side holding surface closer to both ends of the terminal screw than the intermediate holding surface on both sides of the intermediate holding surface. According to this configuration, the stranded wire can be held between the terminal screw and the side holding surface in a state where the single core wire is held between the distal end surface of the terminal screw and the intermediate holding surface. Further, it is possible to hold only a single core wire or only a stranded wire, and it is possible to cope with various connection forms.

According to a ninth aspect of the present invention, in the first to eighth aspects of the present invention, the terminal frame is formed by joining two bent sheet metals, and the ends of the two sheet metals are joined together. The concave and convex portions are joined by engaging the portions and the coupling concave portions. According to this configuration, since the two sheet metals may be bent into a substantially U-shape or the like, manufacturing is easier than when one sheet metal is bent in a ring shape.

According to a tenth aspect of the present invention, in the first to third aspects of the present invention, there is provided a terminal plate integrally formed with the terminal frame, and a terminal of the terminal frame facing the tip end surface of the terminal screw is provided with a terminal. A receiving piece is formed so that a part of the frame is cut and raised, and a cross section along the opening surface of the terminal frame is formed to have a shape along the distal end face of the terminal screw, and the receiving piece faces the distal end face of the terminal screw. The surface functions as a holding surface. According to this configuration, since the terminal plate is formed integrally with the terminal frame, the number of parts is reduced as compared with the case where the terminal plate is separately provided. In addition, since one surface of the receiving piece functions as a holding surface, even when a stranded wire is used as the electric wire, it can be held firmly.

[0018]

Embodiments of the present invention will be described below with reference to the drawings.

(Embodiment 1) As shown in FIG. 1, a pillar terminal according to the present embodiment is configured such that a terminal screw 2 is screwed into a screw hole 1a formed in an upper portion of an annular terminal frame 1, and a terminal screw 2 is provided. 2
Of the terminal frame 3 and a terminal plate 3 partially inserted into the bottom of the terminal frame 1 to mechanically hold and electrically connect the electric wires.

A countersink 1b is formed by burring on the outer peripheral portion of the screw hole 1a so as to increase the screwing amount between the terminal frame 1 and the terminal screw 2.

In the present embodiment, the sheet metal is bent into a rectangular cross section, and the connecting protrusion 1c and the connecting recess 1 formed at the end of the sheet metal.
and d to engage with each other so that the terminal frame 1
Is formed. The coupling convex portion 1c is formed in a substantially T-shape, the coupling concave portion 1d is formed in a shape capable of meshing with the coupling convex portion 1c, and the portion where the coupling convex portion 1c and the coupling concave portion 1d are irregularly coupled is the terminal screw 2 When the electric wire is sandwiched between the terminal board 3 and the terminal board 3, it is located on the side of the terminal screw 2 (on the front side in FIG. 1).

As described above, by forming the coupling convex portion 1c into a substantially T-shape, the ends are not separated from each other even when a force in the direction of separating the ends of the sheet metal is applied. A high terminal frame 1 can be obtained. In addition, a portion where the coupling convex portion 1c and the coupling concave portion 1d are irregularly coupled is
Since the electric wire is located between the terminal screw 2 and the terminal plate 3 when the electric wire is sandwiched between the terminal screw 2 and the terminal plate 3, the force acting when the terminal screw 2 is tightened is equal to the coupling protrusion 1 c. It acts in a direction to separate the coupling recess 1d,
Since the coupling protrusion 1c and the coupling recess 1d do not act in the direction of shifting in the thickness direction of the sheet metal, the terminal frame 1 is not damaged by the tightening of the terminal screw 2.

As shown in FIG. 2, the distal end surface 2a of the terminal screw 2 is a convex
An arc-shaped holding surface 3a having a cross section along the opening surface of the terminal frame 1 is formed on the surface facing the distal end surface 2a.

Next, a method of connecting the pillar terminals according to the present embodiment will be described with reference to FIG. As shown in FIG. 3A, a stranded wire 4 or a single-core wire 5 can be used as an electric wire connected to the pillar terminal. After inserting the strand 4a of the stranded wire 4 or the core wire 5a of the single core wire 5 between the distal end surface 2a of the terminal screw 2 (see FIG. 1) and the terminal plate 3, the terminal screw 2 is tightened as shown in FIG. ), The element wire 4a and the core wire 5
a is sandwiched between the distal end surface 2a and the holding surface 3a. In this way, the stranded wire 4 and the single-core wire 5 are mechanically held and electrically connected to the pillar terminal of the present embodiment.

Here, since the distal end surface 2a of the terminal screw 2 is a convex curved surface and the holding surface 3a of the terminal plate 3 facing the distal end surface 2a is also arc-shaped, the strand 4a of the stranded wire 4 is The wire 4a can be sandwiched between the end face 2a and the terminal plate 3 so as not to spread.

The gap W between the inner peripheral surface of the terminal frame 1 and the side surface of the terminal screw 2 is set smaller than the diameter of the strand 4a of the stranded wire 4, and the distal end surface 2a of the terminal screw 2 and the holding surface. When the element wire 4a is sandwiched between the terminal frame 1a and the terminal frame 1a.
Is prevented from being entangled between the terminal screw 2 and the terminal wire 2 when the terminal screw 2 is tightened, and the wire 4a is prevented from breaking when the terminal screw 2 is tightened.

In the present embodiment, since the terminal frame 1 is formed of sheet metal, the terminal frame 1 is not wasteful and easy to manufacture as compared with the case where the terminal frame 1 is formed by cutting. Since the countersink 1b is provided in the screw hole 1a into which the terminal screw 2 is screwed, the screwing amount between the terminal frame 1 and the terminal screw 2 can be increased as compared with the case where the countersink 1b is not provided, The terminal screw 2 can be firmly tightened.

In the present embodiment, the terminal plate 3 inserted between the distal end surface 2a of the terminal screw 2 and the inner peripheral surface of the terminal frame 1 is provided.
Since the holding surface 3a is formed on the terminal frame 1, it is not necessary to form a holding surface on the terminal frame 1, and the shape of the terminal frame 1 is simplified.

(Embodiment 2) In this embodiment, as shown in FIGS. 4 and 5, a portion (see FIG. 1) of the terminal screw 1 in the terminal frame 1 described in Embodiment 1 which faces the distal end surface 2a (see FIG. 1). A receiving piece 1e for receiving the terminal plate 3 is formed on the bottom of the inner peripheral surface of the terminal frame 1).

The receiving piece 1 e is formed by cutting and raising the bottom of the inner peripheral surface of the terminal frame 1. As shown in FIG. It is curved so as to form an arc along the surface 2a. Other configurations are the same as those of the first embodiment.

In this embodiment, the same effects as those of the first embodiment can be obtained, and the terminal plate 3
Are almost in close contact with each other, so that the terminal plate 3 does not fluctuate with respect to the terminal frame 1 and the strength of holding the electric wire between the terminal screw 2 and the terminal plate 3 increases.

(Embodiment 3) In this embodiment, as shown in FIG. 6, a terminal frame 1 is formed by bending a sheet metal, and a screw-side terminal frame 10 and a receiving-side terminal frame 11 are formed.
Are formed by combining the above two members.

Screw terminal frame 10 and receiving terminal frame 11
Are each formed in a substantially U-shaped cross section. One of the two leg pieces of the screw-side terminal frame 10 and the receiving-side terminal frame 11 is formed with a coupling projection 1c having the same shape as that of the first embodiment, and the other is formed with a coupling recess 1d. Therefore, the screw-side terminal frame 10 and the receiving-side terminal frame 11 are connected by engaging the connecting protrusion 1c and the connecting recess 1d with each other.

A screw hole 1a similar to that of the first embodiment is formed in the upper part of the screw-side terminal frame 10, and a counter sink 1b is formed in the outer periphery of the screw hole 1a. A receiving piece 1e having the same shape as that of the second embodiment is formed at the bottom of the inner peripheral surface of the receiving terminal frame 11. Other configurations are the same as those of the second embodiment.

In the present embodiment, since the screw-side terminal frame 10 and the receiving-side terminal frame 11 may be formed in a substantially U-shaped sheet metal, respectively, one sheet metal is formed in an annular shape as in the first and second embodiments. Manufacturing is easier than in the case of bending.

(Embodiment 4) In each of the above embodiments,
Although the terminal plate 3 is provided separately from the terminal frame 1, in this embodiment, as shown in FIG. 7, a blade receiving spring into which the plug blade of the plug is inserted is formed integrally with the terminal frame 1 as the terminal plate 12. It is. Tip surface 2a of terminal screw 2 in terminal frame 1
A receiving piece 1e (see FIG. 4) having a shape similar to that of the second embodiment is formed at a portion facing the first member (see FIG. 1). Other configurations are the same as those of the second embodiment.

In this embodiment, since the terminal plate 12 is formed integrally with the terminal frame 1, the number of parts is smaller than when the terminal plate 3 is provided separately from the terminal frame 1 as in the first to third embodiments. Less.

The terminal plate 12 is not limited to a blade receiving spring, but may be a contact terminal plate of a switch.

(Embodiment 5) This embodiment corresponds to Embodiment 1.
In the configuration shown in FIG. 8, the center portion of the terminal plate 3 in the cross section along the opening surface of the terminal frame 1 is recessed to form an intermediate holding surface 3ab at the center of the holding surface 3a. Side holding surfaces 3ac extend on both sides of the intermediate holding surface 3ab.

The intermediate holding surface 3ab is curved in a cross section along the opening surface of the terminal frame 1 along the peripheral surface of the core wire 5a of the single core wire 5 held between the terminal screw 2 and the tip end surface 2a. . Side holding surfaces 3a provided on both sides of the intermediate holding surface 3ab
c is the distance from the tip surface 2a of the terminal screw 2 to the intermediate holding surface 3a.
b, the curvature is smaller than that of the intermediate holding surface 3a, and the distance between the terminal screw 2 and the tip end surface 2a becomes smaller toward both ends of the holding surface 3a.
Further, a portion straddling the intermediate holding surface 3ab and the side holding surface 3ac is formed in an arc shape that is convex toward the terminal screw 2. Other configurations are the same as in the first embodiment.

As shown in FIG. 9, the core terminal 5a of the single core wire 5 and the strand 4 of the stranded wire 4 are connected to the pillar terminal of this embodiment.
a at the same time, the core wire 5 a of the single core wire 5 enters the intermediate holding surface 3 ab and the distal end surface 2 a of the terminal screw 2.
The element wire 4a is sandwiched between the distal end surface 2a of the terminal screw 2 and the side holding surface 3ac without spreading to both ends of the holding surface 3a. As described above, in the pillar terminal of the present embodiment, the core wire 5a of the single core wire 5 and the element wire 4a of the stranded wire 4 can be simultaneously connected.

The pillar terminal of this embodiment can correspond to various connection forms. For example, as shown in FIG. 10, the strands 4a of the stranded wires 4 can be connected. In this case, the wires 4a do not spread to both ends of the holding surface 3a but gather near the intermediate holding surface 3ab and are held between the tip end surface 2a of the terminal screw 2 and the holding surface 3a.

Also, as shown in FIG. 11, it is possible to connect the core wires 5a of the two single core wires 5 at the same time.
As shown in FIG. 1 (a), even if the two core wires 5a are biased to one side of the holding surface 3a, the intermediate holding surface 3ab and the side holding surface 3ac
When the terminal screw 2 is tightened, the core wire 5a slides out of the intermediate holding surface 3ab, and as shown in FIG. 11B, the two core wires 5a are formed.
Can be held without being biased to one side of the holding surface 3a. Furthermore, as shown in FIG. 12, the core wires 5a of the three single core wires 5 can be connected simultaneously.

(Embodiment 6) In this embodiment, as shown in FIG. 13, the shape of the surface where the ends of the sheet metal forming the terminal frame 1 abut each other is the same as that of the embodiment 1 shown in FIG. Are different. Here, the butting surface 1f is
It is assumed to include a portion where the coupling convex portion 1c and the coupling concave portion 1d are engaged.

On the butting surface 1f, the coupling projection 1c
From the bases of both side surfaces 1fa of the T-shaped vertical piece, a connecting surface 1fb extends rightward and leftward in the figure, respectively, orthogonally to each side surface 1fa, and a downward direction from the outer end of each connecting surface 1fb. The engagement surface 1fc is extended. Further, from the lower end of each meshing surface 1fc, a locking surface 1fd which is inclined downward in the drawing toward the opening surface of the terminal frame 1 is extended. That is, the locking surface 1fd is inclined toward the opening surface of the terminal frame 1 so as to approach the distal end side of the coupling protrusion 1c. In addition, from the lower ends of both side surfaces 1fa of the vertical piece of the coupling convex portion 1c, meshing surfaces 1fe that are inclined upward toward the left and right in the figure are formed.

Since the butting surface 1f has the above-described shape, when the terminal screw 2 is tightened to the terminal frame 1, the connecting protrusion 1c is pulled out from the connecting recess 1d along the axis of the terminal screw 2. Even if a force is applied, the engagement surface 1fe prevents the coupling convex portion 1c from moving in a direction to come out of the coupling concave portion 1d. At this time, the coupling recess 1
d receives the force from the coupling convex portion 1c, so that the coupling concave portion 1d
Is caused to open the mouth, but the locking surface 1f
Since d intersects the direction of the stress F at an angle close to a right angle, the locking surface 1fd receives the stress F, and the opening of the coupling recess 1d due to the stress F can be prevented. Moreover, since the engagement surface 1fc is formed to prevent the coupling recess 1d from opening to the left and right,
This also prevents opening of the coupling recess 1d.

Further, in the present embodiment, as shown in FIGS. 14 and 15, when the terminal frame 1 is assembled, after the coupling convex portion 1c and the coupling concave portion 1d are engaged with each other, a portion including the butting surface 1f is formed. Important points are crushed in the thickness direction of the sheet metal forming the terminal frame 1. Thereby, the butting surface 1f
Since the crushed portions are pressed against each other and the butted surface 1f of the sheet metal is difficult to separate, the coupling convex portion 1c and the coupling concave portion 1d do not move with each other, and the opening of the coupling concave portion 1d can be more reliably prevented. . The place to be crushed may be appropriately selected. For example, as shown by a circle in FIG. 14, small areas may be crushed at many places, or a wide area may be crushed at a small number of places as shown by A in FIG. I just need.

As shown in FIG. 16, the above-mentioned pillar terminals are housed in, for example, a receptacle 40 with a switch. In the illustrated example, three pillar terminals (the terminal frame 1 used in this embodiment is illustrated in the figure) are housed in the body 40. The handle 42 of the switch is exposed on the front surface (the upper surface in the figure) of the body 40, and three insertion openings 40b into which plugs are inserted are opened. These insertion openings 40b
Is opened at the tip end surface of the convex portion 40 a provided on the front surface of the container 40. A plate 41 having an exposure window 41a into which the projection 40a is inserted and an exposure window 41b exposing the handle 42 of the switch is covered on the front side of the body 40.

[0049]

According to the first aspect of the present invention, there is provided a terminal frame formed by bending a sheet metal and joining the ends together, and a counter sink provided at one location of a peripheral wall of the terminal frame and provided on a peripheral outer surface thereof. A terminal screw that is screwed into a screw hole having a tip end surface and has a convex curved surface, and is protruded at one end of a sheet metal forming a terminal frame, and the tip end portion is wider than the base portion. The ends of the sheet metal are unevenly coupled to each other by engaging the coupling convex portion with the coupling concave portion formed at the other end, and an opening of the terminal frame is provided at a portion where the electric wire is sandwiched between the terminal portion and the tip end surface of the terminal screw. A cross-section along the surface is curved in the same direction as the distal end surface of the terminal screw, and a holding surface is formed in which a distance from the distal end surface of the terminal screw at the intermediate portion is set to be equal to or greater than a distance at both end portions, Since the terminal frame is made of sheet metal, cut the terminal frame Compared to the case of forming by a process, there is an advantage that the material is not wasted and the manufacturing is easy, and since the counter sink is provided in the screw hole into which the terminal screw is screwed, no counter sink is provided. As compared with the case, the screwing amount between the terminal frame and the terminal screw can be increased, and there is an advantage that the terminal screw can be firmly tightened. The tip surface of the terminal screw is a convex curved surface, and the holding surface facing the tip surface of the terminal screw is curved in the same direction as the tip surface of the terminal screw, and the distance from the tip surface of the terminal screw at the intermediate portion is both ends. Since the distance is set to be equal to or greater than the distance in the part, not only when a single core wire is used as the electric wire, but also when a stranded wire is used as the electric wire, the strand of the stranded wire is difficult to spread, and is sandwiched between the terminal screw and the holding surface. It has the advantage that it becomes possible.

According to the second aspect of the present invention, since the connecting projections have a substantially T-shape, the ends are not separated from each other even if a force in the direction of pulling apart the ends of the sheet metal is applied. However, there is an advantage that a terminal frame having high strength can be obtained.

According to a third aspect of the present invention, in the second aspect of the present invention, when the electric wire is clamped between the terminal screw and the holding surface, the portion where the coupling convex portion and the coupling concave portion are unevenly coupled is formed. , The force acting when the terminal screw is tightened acts in a direction to separate the end of the sheet metal, and the terminal frame is not damaged by the tightening of the terminal screw.

According to a fourth aspect of the present invention, in the third aspect of the present invention, the surfaces where the ends of the sheet metal abut against each other are formed along the axis of the terminal screw on the side as described above, and are joined when the terminal screw is tightened. A first mating surface for preventing opening of the coupling concave portion due to a force acting from the convex portion, and a second meshing surface for preventing movement of the coupling convex portion along the axis of the terminal screw in a direction in which the coupling convex portion is pulled out from the coupling concave portion. A locking surface that is inclined from the base side of the coupling convex portion toward the opening surface of the terminal frame so as to approach the distal end side of the coupling convex portion. Even when the terminal screw is strongly tightened, There is an advantage that the opening is prevented, and as a result, the electric wire can be held firmly.

According to a fifth aspect of the present invention, in the first to fourth aspects of the present invention, there is provided a terminal plate partially inserted between a tip end surface of the terminal screw and an inner peripheral surface of the terminal frame. Since the holding surface is formed on the surface facing the distal end surface of the terminal screw, there is no need to form the holding surface on the terminal frame, and there is an advantage that the shape of the terminal frame is simplified.

According to a sixth aspect of the present invention, in the first to fifth aspects, the gap between the inner peripheral surface of the terminal frame and the side surface of the terminal screw is larger than the diameter of the strand of a stranded wire used as an electric wire. Because the setting is small, when the stranded wire is sandwiched between the terminal screw and the holding surface, the strand of the stranded wire gets caught between the inner peripheral surface of the terminal frame and the terminal screw and clings to the terminal screw This prevents the wire from breaking when the terminal screw is tightened.

According to a seventh aspect of the present invention, in the first to sixth aspects of the present invention, a part of the terminal frame is cut and raised at a portion of the terminal frame facing the distal end surface of the terminal screw and the opening surface of the terminal frame is formed. A receiving piece bent so that a cross section along the terminal screw has a shape along the front end surface of the terminal screw is formed.When a terminal plate is provided, the terminal plate can be almost closely contacted with the receiving piece, and the terminal There is an effect that the strength of holding the electric wire between the screw and the terminal plate is increased, and the electric wire can be firmly held between the terminal screw and the receiving piece even when the terminal plate is not provided.

According to an eighth aspect of the present invention, in the first to sixth aspects of the present invention, the holding surface extends along a peripheral surface of a single-core core wire to be connected to a central portion in a cross section along the opening surface of the terminal frame. It has an intermediate holding surface curved in a shape, and a side holding surface closer to the terminal screw end surface than the intermediate holding surface on both sides of the intermediate holding surface. The stranded wire can be held between the terminal screw and the side holding surface while being held between the holding surface, and it is also possible to hold only a single-core wire or only the stranded wire. There is an advantage that it is possible to correspond to the connection form.

According to a ninth aspect of the present invention, in the first to eighth aspects of the present invention, the terminal frame is formed by joining two bent sheet metals, and the ends of the two sheet metals are joined together. The concave and convex portions are engaged by engaging the portions and the coupling concave portions, and the two sheet metals may be bent into a substantially U-shape or the like. There is an advantage that manufacturing is easy.

According to a tenth aspect of the present invention, in the first to third aspects of the present invention, a terminal plate integrally formed with the terminal frame is provided, and a terminal of the terminal frame facing a tip end surface of the terminal screw is provided with a terminal. A receiving piece is formed so that a part of the frame is cut and raised, and a cross section along the opening surface of the terminal frame is formed to have a shape along the distal end face of the terminal screw, and the receiving piece faces the distal end face of the terminal screw. Since the surface functions as a holding surface and the terminal plate is formed integrally with the terminal frame, there is an advantage that the number of components is smaller than when a separate terminal plate is provided. Further, since one surface of the receiving piece functions as a holding surface, there is an effect that even when a stranded wire is used as the electric wire, it can be held firmly.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing Embodiment 1 of the present invention.

FIG. 2 is a sectional view showing the same.

FIG. 3A is a perspective view before the electric wire is connected, and FIG. 3B is a perspective view after the electric wire is connected.

FIG. 4A is a perspective view showing a terminal frame used in Embodiment 2 of the present invention, and FIG. 4B is a perspective view of a main part of the terminal frame.

FIG. 5 is a front view showing a terminal frame used in the embodiment.

FIG. 6 is an exploded perspective view showing a terminal frame used in Embodiment 3 of the present invention.

FIG. 7 is a perspective view showing a terminal frame used in Embodiment 4 of the present invention.

FIG. 8A is a front view showing a state where a single core wire is connected to a pillar terminal according to Embodiment 5 of the present invention, and FIG. 8B is a front view showing a terminal plate used in the same.

FIG. 9 is a front view showing an example of use of the above.

FIG. 10 is a front view showing an example of use of the above.

11A and 11B show an example of use of the above, wherein FIG. 11A is a front view before connection, and FIG. 11B is a front view after connection.

FIG. 12 is a front view showing an example of use of the above.

FIG. 13 is a side view showing a terminal frame used in Embodiment 6 of the present invention.

FIG. 14 is a perspective view showing an embodiment of the above.

FIG. 15 is a perspective view showing another embodiment of the above.

FIG. 16 is an exploded perspective view showing an example of use of the above.

FIG. 17 is a sectional view showing a conventional example.

FIG. 18 is a sectional view showing another conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Terminal frame 1a Screw hole 1b Counter sink 1c Coupling convex portion 1d Coupling concave portion 1e Receiving piece 1f Butt surface 1fc Meshing surface 1fd Locking surface 1fe Meshing surface 2 Terminal screw 2a Tip surface 3 Terminal plate 3a Holding surface 3ab Intermediate holding surface 3ac side Holding surface 4 Twisted wire 4a strand 5 Single core wire 5a Core wire 10 Screw side terminal frame 11 Receiving side terminal frame 12 Terminal plate

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Masahiko Maeda 1048 Kazuma Kadoma, Osaka Prefecture Matsushita Electric Works, Ltd. Term (reference) 5E012 BA24

Claims (10)

[Claims] A terminal frame formed into an annular shape by bending a sheet metal and joining ends thereof, and a screw hole provided through a portion of a peripheral wall of the terminal frame and having a countersink on a peripheral outer surface thereof. A terminal screw having a convex curved surface at the front end surface, and a connecting convex portion at which the front end portion is wider than the base portion and is protruded at one end portion of the sheet metal forming the terminal frame. The ends of the sheet metal are unevenly coupled to each other by engaging the coupling concave portions formed at the ends, and a section along the opening surface of the terminal frame is provided at a portion where the electric wire is sandwiched between the ends of the sheet metal and the distal end surface of the terminal screw. Are curved in the same direction as the distal end surface of the terminal screw, and a holding surface is formed in which the distance from the distal end surface of the terminal screw at the intermediate portion is set to be equal to or greater than the distance at both end portions. 2. The pillar terminal according to claim 1, wherein the coupling projection is substantially T-shaped. 3. The part where the coupling convex part and the coupling concave part are unevenly coupled is a part located on the side of the terminal screw when the electric wire is clamped between the terminal screw and the holding surface. 3. The pillar terminal according to claim 2, wherein: 4. A surface where the ends of the sheet metal abut against each other is formed along the axis of the terminal screw on the side of the protrusion, and is formed by a force acting from the coupling protrusion when the terminal screw is tightened. A first engagement surface for preventing opening of the coupling recess, a second engagement surface for preventing movement of the coupling projection along the axis of the terminal screw in a direction in which the coupling projection is pulled out of the coupling recess, and the coupling projection; 4. The pillar terminal according to claim 3, further comprising: a locking surface that is inclined from a base side toward an opening surface of the terminal frame so as to approach a distal end side of the coupling protrusion. 5. A terminal plate partially inserted between a distal end surface of the terminal screw and an inner peripheral surface of the terminal frame, wherein the holding surface is provided on a surface of the terminal plate facing the distal end surface of the terminal screw. The pillar terminal according to any one of claims 1 to 4, wherein the pillar terminal is formed. 6. A gap between an inner peripheral surface of the terminal frame and a side surface of the terminal screw is set smaller than a diameter of a strand of a stranded wire used as the electric wire. A pillar terminal according to claim 5. 7. A part of the terminal frame is cut and raised at a portion of the terminal frame facing the distal end surface of the terminal screw, and a cross section along an opening surface of the terminal frame has a shape along the distal end surface of the terminal screw. The pillar terminal according to any one of claims 1 to 6, wherein a receiving piece bent into a shape is formed. 8. The holding surface has an intermediate holding surface curved along a peripheral surface of a core wire of a single core wire to be connected to a central portion in a cross section along the opening surface of the terminal frame. The pillar terminal according to claim 1, further comprising a side holding surface on both sides closer to a tip end surface of the terminal screw than an intermediate holding surface. 9. The terminal frame is formed by joining two bent sheet metals, and the ends of both sheet metals are unevenly joined by engaging a joining projection and a joining recess. 9. The method according to claim 1, wherein:
The pillar terminal according to any one of the above. 10. A terminal plate integrally formed with the terminal frame, a part of the terminal frame facing a tip end surface of a terminal screw is cut and raised, and a portion of the terminal frame is formed on an opening surface of the terminal frame. A receiving piece curved so that a cross section along the terminal screw has a shape along the distal end face of the terminal screw is formed, and a surface of the receiving piece facing the distal end face of the terminal screw functions as the holding surface. The pillar terminal according to claim 1.