JP4343437B2 - Connecting terminal - Google Patents

Description

[0001]
According to the present invention, a clamping member is movably held by a clamping screw and electrically supported by a contact member on one side of the clamping screw so as to electrically contact a plurality of insulating conductors with the clamping member. The connection terminal is supported by a conductor on the other side, and the fastening member and the contact member have a plurality of cutting elements at the fastening portion.
[0002]
Such a connection terminal is known from DE 22 29 835 A1. This connection terminal is used to connect the electrical conductor to the device by means of a clamping screw. For this purpose, the conductor is introduced between the clamping member (clamping plate) of the connection terminal and the contact member, and is brought into electrical contact without being bare by moving the clamping member onto the contact member by the connection screw. . A cutting element provided on the clamping member and the contact member cuts through the insulation coating of the conductor and then penetrates the insulation coating until it contacts the conductor core wire. With this connection terminal, current guide from the conductor to the contact member is achieved simultaneously with fixing of the conductor.
[0003]
Known connection terminals are intended for contact with only one conductor, but conductors with different cross-sectional areas can be used. For this purpose, the clamping member is removed from the contact member to some extent by the clamping screw. When a plurality of conductors having different cross-sectional areas must be brought into contact with each other, a separate connection terminal must be provided for each of these conductors.
[0004]
It is an object of the present invention to provide a connecting terminal of the kind mentioned at the outset in which at least two conductors of any cross-sectional area can be reliably contacted with as little dimensions as possible at the clamping point.
[0005]
According to the present invention, according to the present invention, the clamping member is movably held by a clamping screw) in order to electrically contact a plurality of insulated conductors with the clamping member, and is contacted on one side of the clamping screw. In a connection terminal that is supported by a member and supported by a conductor on the other side of the fastening screw, and the fastening member and the contact member have a plurality of cutting elements in the fastening portion, the fastening screw is positioned after the fastening portion in the insertion direction of the conductor. When the support of the tightening member is positioned after the tightening screw and the surface including the conductor axis is assumed to be a horizontal plane, the contact member has a contact surface that is inclined from the horizontal plane and extends in the insertion direction. This is solved by forming a wedge-shaped tightening portion.
The embodiment of the present invention is as follows.
The tightening member is formed to be inclined and extend in the tightening portion in the same manner as the contact member (claim 2). The inclination angle of the tightening member is smaller than the inclination angle of the contact member. The inclination angle of the tightening member is α = 20 ° to α = 30 °, particularly α = 25 °. The inclination angle of the contact member is β = 25 ° to β = 40 °, particularly β = 30 ° (Claim 5).
The cutting element of the contact member has two rows of cutting teeth arranged back and forth in the insertion direction of the conductor at the tightening portion (Claim 6). The cutting teeth on the rear side in the insertion direction have a height higher than that of the cutting teeth on the front side (Claim 7).
The contact member has a stopper for the tightening member on the tightening portion side of the tightening screw.
The contact member has a protrusion as an insertion assisting means in front of the cutting tooth in the insertion direction (claim 9).
The body of the tightening screw guided through the through hole of the tightening member has an annular ridge, and this annular bulge is caught by a protrusion provided in the through hole for automatically lifting the tightening member (claim) Item 10).
The cutting element of the tightening member is swingable about an axis extending in the conductor insertion direction (claim 11).
The cutting element of the clamping member has two blades of different heights (claim 12); The blade of the tightening member is arranged so as to be shifted in the insertion direction of the conductor) with respect to the row of cutting teeth of the contact member (claim 13).
The tightening member has a support leg facing the contact member on the side opposite to the tightening portion of the tightening screw.
[0006]
Furthermore, it is preferable that the tightening member is formed so as to extend with a relatively small inclination angle. In that case, the inclination angle of the clamping member is about 25 °, while the inclination angle of the contact member is about 30 °. This allows for double or multiple contact, whereby two or more conductors arranged in parallel to each other and having different cross-sectional areas are cut off when one of the conductors is cut off when closing the clamping point. Without contact and at the same time reliably and securely.
[0007]
Conveniently, the contact member formed from the contact plate is simultaneously an opening / closing member of the opening / closing device, in which case only the connecting part or the fastening part is formed to extend obliquely. As a result, for example, ^two conductors with an insulation coating having a cross-sectional area of 2.5 mm ² can be clamped in contact with the same clamping part width or terminal block width. Only possible. This creates considerable space savings.
[0008]
Conveniently, from the contact member, two rows of cutting teeth of different heights are shaped for electrical contact (and thus for current transfer from the conductor to the contact member). Different heights of the cutting teeth ensure that small cross-sectional areas (for example 0.5 mm ² ) or relatively large cross-sectional areas (for example 2.5 mm ² ) are brought into contact individually or in combination.
[0009]
In order to reliably prevent the conductors to be connected having different cross-sectional areas from being cut off, it is advantageous if the contact member has a stopper or a support leg for the clamping member on the clamping part side of the clamping screw. When a contact plate is provided as a contact member, this is cut and raised from this contact plate. For this purpose, the cutting teeth are not continuous over the width of the contact member, but are interrupted. Conveniently, an inclined surface for inserting a conductor is formed from this contact element before the cutting element of the contact member in the insertion direction of the conductor or conductors.
[0010]
The clamping member is moved downward in the direction of the contact member by a clamping screw. As a result, the conductor previously inserted into the connection terminal is pushed into the cutting teeth, and at that time, the insulating coating is cut, and electrical contact to the contact member is configured. For this purpose, the fastening screw is guided through the through hole opened in the fastening member. The diameter of the through-hole is selected so that the fastening member can be moved in the direction of insertion of the conductor, and hence in the direction of the conductor axis, both when the fastening screw is attached and removed. Preferably, an annular ridge provided on the fastening screw and a projection provided in the range of the through hole of the fastening member and hooked on the annular ridge enable automatic lifting of the fastening member when opening the connection terminal. As a result, when the fastening screw is rotated correspondingly, the fastening member is moved upward away from the contact member, so that the contact coupling can be easily and reliably released.
[0011]
In a particularly preferred embodiment, the cutting element of the clamping member is supported so as to be pivotable about an axis extending in the insertion direction of the conductor. Similarly, the cutting element of the clamping member itself consists of two blades of different heights. This ensures reliable contact of conductors with a small cross-sectional area as well as conductors with a relatively large cross-sectional area. In order to ensure that the conductor is reliably contacted and securely held in the connection terminal on the one hand and on the other hand to ensure that one of the conductors is not cut, the blade of the clamping member is The contact member is arranged so as to be shifted from the cutting teeth. By pivotally supporting the cutting element of the clamping member, it can be particularly reliably adapted to the obliquely extending profile of the contact member and the various diameters of the clamped conductor. A stopper of the contact member provided on the side opposite to the tightening portion of the tightening screw and facing the contact member further prevents the tightened conductor from being cut.
[0012]
The advantage obtained by the present invention is particularly that in a screw-type connection terminal with a clamping member and a contact member, the diameter of the clamping part varies depending on the clamping part that has an obliquely extending contact member and is substantially conical. The plurality of conductors are securely tightened and brought into contact with each other. As a result, a double or multiple contact using a single connection terminal can be easily and space-saving. At that time, by using a tightening screw, the real middle conductor core wire, at least two electrical conductors are constructed in thin line or multiple lines, over the cross-sectional area range of at least 0.5 mm ² 2.5 mm ² It is possible to make a contact without bareness, with the smallest dimension at a single fastening point, regardless of the thickness of the insulation coating of the conductor and the insulating material. One or more conductors are reliably prevented from being cut when closing the tightening point.
[0013]
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a perspective view of connection terminals for a plurality of conductors in an opening / closing member of an opening / closing device.
FIG. 2 shows a front view of the connection terminal of FIG.
FIG. 3 is a longitudinal sectional view of the connection terminal taken along line III-III in FIG.
FIG. 4 is a perspective view of a connection terminal in which two conductors having different diameters are tightened.
FIG. 5 is a longitudinal sectional view of the connection terminal taken along line VV in FIG.
In addition, the same code | symbol is attached | subjected to the same member in each figure.
[0014]
The connection terminal 1 shown in FIGS. 1 to 3 includes a fixed contact member 2 in the form of a contact plate, a tightening member 3 that is movably disposed above and formed as a tightening plate or an upper plate, and a tightening screw. 4. The tightening screw 4 is guided through the through-hole or through-hole 5 of the tightening member 3 and the screw portion is screwed into the screw hole 6 opened in the contact member 2 (FIG. 3).
[0015]
The tightening member 3 is formed in an L shape, and is supported by a support point 9 of the contact member 2 on the side opposite to the tightening portion 8 of the tightening screw 4 by a leg portion 7 used as a support. The tightening member 3 is formed to extend at an inclination angle α (FIG. 2) at the tightening portion 8. In this tightening portion 8, a cutting element 12 having two blades 12a and 12b arranged at the free end portion 10 of the tightening member 3 in front and back in the conductor insertion direction 11 (FIGS. 4 and 5) is provided. It has been. The cutting element 12 is supported on the fastening member 3 by a pin 13 so as to be rotatable about an axis 13 ′ extending parallel to the conductor axis. For this purpose, the cutting element 12 and the pin 13 are preferably formed from one part (for example a sintered part) and are thus formed from a single piece or from a single part. At that time, the rear blade 12b in the insertion direction 11 has a height h greater than the front blade 12a (FIG. 3).
[0016]
The contact member 2 has a stopper 14 for the tightening member 3 which is cut and raised from the contact plate on the tightening portion 8 side of the tightening screw 4 and is formed in the direction of the tightening portion 3. Further, the contact member 2 has a protruding portion 15 extending at least substantially over the width of the tightening portion 8 in a direction perpendicular to the insertion direction 11 as a conductor insertion auxiliary means. The contact member 2 further comprises a cutting element formed from two rows of cutting teeth 16, 17 at the clamping part 8. The cutting teeth 16 and 17 are arranged so as to be shifted from the blades 12 a and 12 b of the cutting element 12 of the tightening member 3. The front row of cutting elements of the contact member 2 has two cutting teeth 16, while the rear row has three cutting teeth 17 (FIG. 1). In the insertion direction 11, the height h ′ of the rear cutting tooth 17 is larger than the height of the front cutting tooth 16. The front cutting teeth 16 have an insertion slope, while the rear cutting teeth 17 are inclined toward the opposite side.
[0017]
The contact member 2 is formed so as to extend at an inclination angle β with respect to a horizontally extending tightening portion in the tightening portion 8. At this time, it is convenient if the inclination angle β is larger than the inclination angle α of the fastening member 3. The inclination angles are α = (25 ± 5) °, β = (35 ± 5) °, particularly α = 25 ° and β = 30 °. By tilting the contact member 2 in this way in a direction perpendicular to the insertion direction 11, multiple contact with a plurality of conductors (FIGS. 4, 5) is possible with a particularly small size at a single clamping point.
[0018]
In particular, by tilting the contact member 2 in the tightening portion 8, for example, _two conductors 18 and 19 having different diameters d ₁ and d ₂ are arranged side by side in the tightening portion 8 as shown in FIG. It is then particularly easy to clamp in electrical contact there. In this case, the diameter d _{1 of the} conductor 18 is, for example, 2.5 mm ² , while the diameter d _{2 of the} conductor 19 is, for example, 0.5 mm ² . FIG. 5 shows a state in which the conductors 18 and 19 are tightened in a longitudinal sectional view of the conductor 18. At that time, at least the blade 12b of the tightening member 3 and one or two cutting teeth 17 of the contact member 2 cut the insulating coating 20 and completely penetrate the conductor cores 21 of the conductors 18 and 19. This ensures that each of the insulated insulated conductors 18, 19 is held simultaneously and provides reliable electrical contact between the conductors 18, 19 and the contact member 2 for current guidance.
[0019]
For example, to make a clamping contact by rotating the clamping screw 4 clockwise, the connecting terminal 1 is brought from the position shown in FIGS. 1 to 3 to the position shown in FIGS. At that time, the tightening member 3 is supported on the one hand by the supporting point 9 of the contact member 2 via its stopper leg 7 and on the other hand by the conductors 18 and 19, and the movable blades 12 a and 12 b are insulated from the conductors 18 and 19. It penetrates the coating 20. At the same time, the cutting teeth 16 and 17 of the contact member 2 penetrate the insulating coating 20 and press the conductor core wires 21 of the conductors 18 and 19.
[0020]
The stopper 14 reliably prevents the conductors 18 and 19 from being cut. This is also ensured by shifting the blades 12a, 12b of the tightening member 3 and the cutting teeth 16, 17 of the contact member 2 from each other. Such a staggered arrangement further ensures the reliable holding of the conductors 18, 19 in the connection terminal 1. By making the heights h, h ′ of the blades 12a, 12b or the cutting teeth 16, 17 different, reliable contact of the conductors 18, 19 with small and large cross-sectional areas is ensured.
[0021]
By supporting the cutting element 12 of the tightening member 2 in a pivotable manner, the contact member 2 extending in a direction perpendicular to the insertion direction 11 in the tightening portion 8 and the diameter d ₁ , d ₂ are tightened side by side. Adaptation to different conductors 18, 19 is particularly advantageously possible. It is advantageous if the clamping screw 4 is turned at the predetermined rotational moment necessary to penetrate the conductor insulation 20 in order to ensure secure clamping and reliable contact.
[0022]
The inner diameter of the through-hole 5 is set so that the tightening member 3 can be moved at least in the insertion direction 11 when the tightening screw 4 is attached or removed, compared to the thickness of the body of the tightening screw 4. ing. An annular ridge 22 in the screw body and a protrusion 23 provided in the range of the through-hole 5 of the tightening member 3 and caught by the annular ridge 22 enable the tightening member 3 to be automatically lifted when the tightening screw 4 is removed. ing. At this time, for example, when the fastening screw 4 is rotated counterclockwise, the fastening member 3 moves upward, whereby a simple and reliable release of contact coupling at the fastening part 8 is achieved.
[0023]
The case shown only implicitly in FIG. 1 is a part of the switchgear. This is expedient if the contact member 2 is shaped so that it can be clamped easily and in a short time. Similarly, a conductor 18 having a small diameter d ₂ (thus, a conductor 18 having a cross-sectional area of 0.5 mm ² or less) and a conductor having a relatively large diameter d 1 and a cross-sectional area of 2.5 mm ² or more are ensured at each position. In electrical contact. The open / close contact 25 of the contact member 2 is shown in FIGS.
[Brief description of the drawings]
FIG. 1 is a perspective view of connection terminals for a plurality of conductors in an opening / closing member of an opening / closing device.
FIG. 2 is a front view of the connection terminal of FIG.
3 is a longitudinal sectional view of a connection terminal taken along line III-III in FIG.
FIG. 4 is a perspective view of a connection terminal in which two conductors having different diameters are tightened.
5 is a longitudinal sectional view of a connection terminal taken along line VV in FIG. 4;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Connection terminal 2 Contact member 3 Tightening member 4 Tightening screw 5 Through-hole 6 Screw hole 7 Leg part 8 Tightening part 9 Supporting point 10 Free end part 11 Insertion direction 12 Cutting element 12a, 12b Blade 13 Pin 15 Protrusion part 16, 17 Cutting Teeth 18, 19 Conductor 21 Conductor core wire

Claims (14)

The clamping member (3) is movably held by the clamping screw (4) to electrically contact the plurality of insulated conductors (18, 19) by the clamping member (3), and the clamping screw (4 ) Is supported by the contact member (2) on one side and supported by the conductors (18, 19) on the other side of the tightening screw (4), and the tightening member (3) and the contact member (2) are tightened ( 8), in the connecting terminal having a plurality of cutting elements (12; 16, 17), the fastening screw (4) is located after the fastening part (8) in the insertion direction (11) of the conductor (18, 19). When the support (7) of the tightening member (3) is positioned after the tightening screw (4) and the surface including the axis of the conductor (18, 19) is assumed to be a horizontal plane, the contact member (2) is Is also inclined and in the insertion direction (11) Connection terminals, characterized in that the fastening portion of the wedge (8) is formed by having a contact surface for standing.   2. The connection terminal according to claim 1, wherein the tightening member (3) is formed to be inclined and extend in the tightening portion (8) in the same manner as the contact member (2).   The connection terminal according to claim 2, wherein an inclination angle (α) of the tightening member (3) is smaller than an inclination angle (β) of the contact member (2). The connection terminal according to claim 2 or 3, wherein an inclination angle (α) of the tightening member (3) is α = 20 ° to α = 30 ° . 5. The connection terminal according to claim 2, wherein an inclination angle (β) of the contact member (2) is β = 25 ° to β = 40 ° .   The cutting element of the contact member (2) has two rows of cutting teeth (16, 17) arranged back and forth in the insertion direction (11) of the conductors (18, 19) in the clamping part (8). The connection terminal according to claim 1, wherein the connection terminal is a single terminal.   7. The connection terminal according to claim 6, wherein the rear cutting teeth (17) have a height (h ') greater than the front cutting teeth (16) in the insertion direction (11). .   The contact member (2) has a stopper (14) for the clamping member (3) on the clamping part (8) side of the clamping screw (4). Connecting terminal.   One of the claims 1 to 8, characterized in that the contact member (2) has a protrusion (15) as an insertion aid in front of the cutting teeth (16, 17) in the insertion direction (11). The connection terminal described in 1.   The body of the tightening screw (4) guided through the through hole (5) of the tightening member (3) has an annular ridge (22), and this annular ridge (22) is formed on the tightening member (3). The connection terminal according to claim 1, wherein the connection terminal is caught by a protrusion (23) provided in the through-hole (5) for automatic lifting.   11. The cutting element (12) of the clamping member (3) is swingable about an axis (13 ') extending in the insertion direction (11) of the conductor (18, 19). The connection terminal according to one of the above.   12. Connection according to claim 1, wherein the cutting element (12) of the clamping member (3) has two blades (12a, 12b) of different height (h). Terminal.   The blades (12a, 12b) of the tightening member (3) are arranged so as to be displaced in the insertion direction (11) of the conductors (18, 19) with respect to the row of cutting teeth (16, 17) of the contact member (2). The connection terminal according to claim 12.   14. The fastening member according to claim 1, characterized in that the fastening member (3) has a support leg (7) facing the contact member (2) on the side opposite to the fastening part (8) of the fastening screw (4). The connection terminal according to one.

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