JP2004022405A - Terminal block - Google Patents

Abstract

An object of the present invention is to provide a terminal block commonly used for both a screw connection method and a push connection method so that sufficient reliability can be obtained.
A screw-type connection portion (Y) and a press-type connection portion (Z) are provided, and a screw (1) of the screw-type connection portion (Y) is inserted into a cavity (4a) of the press-type connection portion (Z). The screw 1 is used for both tightening of the electric wire connection end in the screw-type connection portion Y and pressing of the electric wire connection end in the press-type connection portion Z.
[Effect] There is no restriction on the size of the rod terminal as the tip treatment applied to the wire to be wired, the diameter of the wire that can be wired without the tip treatment, and the reliability when wiring the wire without the tip treatment. Can be improved.
[Selection diagram] Fig. 1

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a terminal block for electric equipment, and particularly to a terminal block suitable for an inverter device.
[0002]
[Prior art]
In general, an electric device such as an inverter device is used by being connected to a power supply or a load by an electric wire, and for this reason, it is customary to provide a terminal block for electric wire connection.
[0003]
As typical examples of the terminal blocks mounted on such electric equipment, there are a terminal block of a screw connection type and a terminal block of a press connection type, both of which have been widely used in inverter devices conventionally. ing.
[0004]
4 (a) and 4 (b) show an example of the terminal block 10 of the screw connection type. In the figure, 1 is a screw (a small screw with a head), 2 is a main body molding part, Is a fastening pedestal portion, and the screw 1 is screwed (screwed) into a female screw hole provided in the metal fastening pedestal portion 3 to form a screw fastening type connection portion together with the fastening pedestal portion 3. Thus, the connection ends of the electric wires are tightened for connection.
[0005]
Then, for the terminal block 10 of the screw connection type, an electric wire W1 in which a ring-type terminal 7 shown in FIG. 7A is attached to a connection end, or a U-shaped terminal 8 shown in FIG. Uses the electric wire W2 attached to the connection end. It should be noted that the ring-type terminal 7 and the U-shaped terminal 8 use a press-contact type terminal commonly called an amplifier (trade name).
[0006]
In the case of the ring-type terminal 7 shown in FIG. 7A, the screw 1 is removed once, the screw 1 is passed through the hole of the terminal 7, and then screwed into the fastening base 3 for connection. In the case of the U-shaped terminal 8 shown in FIG. 7 (b), the U-shaped opening can be inserted into the screw 1 only by loosening the screw 1, and then the screw 1 is screwed into the fastening base 3 to be connected. Will do.
[0007]
Next, FIGS. 5A and 5B show an example of the terminal block 20 of the press-fit connection method. In the figure, reference numeral 1 denotes a screw, 2 denotes a main body mold, and 4 denotes a press-connecting portion. The screw 1 and the main body mold 2 are the same as the terminal block 10 in FIG.
[0008]
The pressing connection portion 4 has a rectangular hollow portion 4a, in which the tip of the screw 1 is made to protrude from the upper side in the figure, and an electric wire is connected in the hollow portion 4a. After the end is inserted, the screw 1 is screwed in, and the connection end of the electric wire is pressed down and fixed at the tip of the screw 1 to form a pressing-type connection portion, whereby connection is obtained.
[0009]
At this time, for the terminal block 20 of this type, the electric wire W3 in which the rod terminal 9 shown in FIG. 8A is attached to the connection end, or simply coating of the connection end as shown in FIG. An electric wire W4 whose core wire 10 is simply peeled off and used is used.
[0010]
By the way, when the terminal block 10 of FIG. 4 or the terminal block 20 of FIG. 5 is used, one of the terminal blocks is provided in, for example, an electric device such as an inverter device. Then, the terminal type of the connection end of the electric wire used for connecting the electric device is determined depending on the type of the terminal block provided in the electric device.
[0011]
Also, at this time, if the intention of the user is respected, the manufacturer of the electric device selects one of the terminal blocks according to the intention of the user, and selects one of the terminal blocks as the electric device for the user. However, in this case, it is necessary for the manufacturer to prepare two types of terminal blocks of the screw connection type and the terminal block of the press connection type, which increases management man-hours.
[0012]
Therefore, in order to address the above-mentioned problems, as a conventional technique, a washer attached to a screw was used, and even with a terminal block of a screw connection type, an electric wire having a rod terminal attached to the connection end, or a core wire with the coating removed. There is known a terminal block which can be connected to an electric wire which only has a wire exposed, and an example thereof is shown as a terminal block 11 in FIGS. 6 (a), 6 (b) and 6 (c).
[0013]
In FIG. 6, reference numeral 6 denotes a washer (perforated washer). The washer 6 is inserted into the screw 1 after its outer shape is made substantially square in accordance with the shape of the connection surface of the fastening base 3. When the screw 1 is screwed into the fastening base 3, the screw 1 is fastened together with the fastening base 3.
[0014]
Also in the terminal block 11 of FIG. 6, the screw 1, the main body mold 2, and the fastening base 3 are the same as those of the terminal block 10 shown in FIG. Only with the washer 6, as a whole, the screw connection method is the same as that of the terminal block 10 shown in FIG. 4.
[0015]
Therefore, even with the terminal block 11 of the screw connection type according to the prior art, in the case of the ring-shaped terminal 7 shown in FIG. 7A and the case of the U-shaped terminal 8 shown in FIG. The attachment base 3 allows connection in the same manner as the terminal block 10 in FIG.
[0016]
On the other hand, in the case of the terminal block 11, an electric wire W3 in which the bar terminal 9 shown in FIG. 8A is attached to the connection end can also be connected, and the electric wire W4 which only exposes the core wire 10 shown in FIG. But you can connect.
[0017]
That is, in this case, as shown in FIG. 6 (c), after loosening the screw 1, the bar terminal 9 or the core wire 10 is inserted between the washer 6 and the fastening base 3, and thereafter the screw 1 is Therefore, according to the terminal block 11 of the related art, the screw connection method and the push connection method can be used in common.
[0018]
[Problems to be solved by the invention]
The prior art described above does not say that sufficient consideration has been given to maintaining the performance required for the terminal block of the press-fit connection method. And the reliability of the connection is problematic.
[0019]
In the prior art, as shown in FIG. 6C, the screw 1 is tightened with the rod terminal 9 or the core wire 10 of the electric wire to be connected being present in only one of the screws 1, so that a bending stress occurs in the screw 1. Therefore, uniform screw tightening becomes difficult. For this reason, when the rod terminal 9 or the core wire 10 becomes thick, fixing by screw tightening becomes unstable, and connection becomes uncertain.
[0020]
Also, when the wire diameter is large when wiring with an electric wire that is not subjected to the tip treatment, there is a risk that the uncoated core portion is pressed and collapsed, and the core portion protrudes from the washer and the wire is easily detached. .
[0021]
Therefore, in the prior art, the thickness of the rod terminal as the tip treatment applied to the wire to be wired and the diameter of the wire that can be wired without the tip treatment are restricted, and the reliability of the connection part is problematic. Will occur.
[0022]
SUMMARY OF THE INVENTION An object of the present invention is to provide a terminal block commonly used for both the screw connection method and the push connection method so that sufficient reliability can be obtained.
[0023]
[Means for Solving the Problems]
The object is to provide, in a terminal block having both a screw-type connection portion and a pressed-type connection portion, inserting a screw of the screw-type connection portion into a cavity of the press-type connection portion, and The present invention is achieved in such a manner that it is commonly used for tightening the wire connection end in the screw-type connection portion and for pressing the wire connection end in the pressing-type connection portion.
[0024]
Here, the screw-type connection portion and the pressing-type connection portion are provided on one surface and the other surface of the female screw portion with the female screw portion to which the screw is screwed interposed, and the female screw portion is provided. A fastening pedestal portion of the screw fastening type connection portion may be formed.
[0025]
Next, here, at least two of the screw-fastened connection portions and the press-fastened connection portions may be arranged side by side perpendicular to the screwing direction of the screws, and The shaped connection portions may be located on the same plane next to each other, and the clamp-type connection portions may be located on different planes alternately next to each other.
[0026]
According to the terminal block of this structure, there is no restriction on the size of the bar terminal as a tip treatment applied to the wire to be wired, the diameter of the wire that can be wired without the tip treatment, and furthermore, the wire without the tip treatment The reliability at the time of wiring can be improved.
[0027]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, the terminal block according to the present invention will be described in detail with reference to the illustrated embodiment. First, FIG. 1 shows a first embodiment of the present invention. In FIG. It is a fastening type connection part, and the entire terminal block is indicated by 12.
[0028]
Here, in the embodiment of FIG. 1, in the state shown in the drawing, first, a plurality of screw-fastened connection portions Y are arranged side by side on the upper side of the terminal block 12, that is, orthogonally to the screwing direction of the screw 1. , And at least two of them are arranged side by side. Next, in the pressing type connecting portion Z, the hollow portion 4a faces downward in the plan view of FIG. The front view of FIG. 1 shows an embodiment in which a plurality of screw-fastened connection portions Y are similarly arranged side by side under each of the screw-fastened connection portions Y in an open state on the surface facing the front. is there.
[0029]
In FIG. 1, a screw 1, a main body mold 2, a fastening base 3, and a pressing connection 4 are the same as those of the terminal blocks of FIGS. In this figure, reference numeral 5 denotes a connection end push plate, which is made of a metal plate, and is housed in the cavity 4a of the press-fit connection portion 4 such that the upper surface thereof comes into contact with the tip of the screw 1. .
[0030]
As shown in the enlarged view of FIG. 2 (a), the screw 1 is fully screwed into the tightening pedestal 3 with a stroke, and when the connecting end push plate 5 is pushed with its tip, the connecting end is pressed. One having a sufficient length so that the pressing plate 5 is in contact with the bottom of the hollow portion 4a and further pressed against the bottom with a predetermined force is used.
[0031]
Next, usage of the terminal block 12 according to this embodiment will be described. First, when the screw 1 is loosened to the full stroke, a space GY is generated between the lower surface of the head of the screw 1 and the tightening base 3, as shown in FIG. A space GZ also occurs between the lower surface and the bottom of the plate 5.
[0032]
Therefore, if the electric wire to be connected to the terminal block 12 is the electric wire W2 shown in FIG. 7B, the U-shaped terminal 8 at the connection end is inserted into the space GY, and then the screw 1 is connected. If it is tightened, the U-shaped terminal 8 is fastened to the fastening base 3 with the head of the screw 1 and fixed, so that the wiring is completed.
[0033]
If the electric wire to be connected to the terminal block 12 is the electric wire W3 shown in FIG. 8A or the electric wire W4 shown in FIG. 8B, either the rod terminal 9 or the core wire 10 is inserted into the space GY. Then, when the screw 1 is tightened, either the rod terminal 9 or the core wire 10 is pressed against the bottom of the hollow portion 4a by the connection end push plate 5, and the wiring is completed.
[0034]
On the other hand, in the case where the electric wire to be connected to the terminal block 12 is the electric wire W1 shown in FIG. 7A, once the screw 1 is extracted from the fastening base 3, the screw 1 is inserted into the hole of the ring type terminal 7. After passing through, the screw is screwed into the fastening base 3 to complete the wiring.
[0035]
Therefore, according to the embodiment of FIG. 1, even if the electric wires to be connected by the terminal block 12 have the terminal structure corresponding to the screw connection method, the terminal structure corresponds to the push connection method. In this case, one terminal block can be used.
[0036]
Moreover, according to the terminal block 12 according to this embodiment, when the wires to be connected have a terminal structure corresponding to the press-fit connection method, that is, the bar terminals 9 shown in FIG. In either case of the attached electric wire W3 or the electric wire W4 in which the core wire 10 shown in FIG. 2B is only exposed, the connection by the press-fit connection method can be obtained. There is no possibility that the reliability is reduced, and high reliability is always obtained.
[0037]
By the way, in the above embodiment, it is not particularly necessary that the interval between the screw-type connecting portion Y and the pressing-type connecting portion Z is the same, and it can be arbitrarily determined. For example, as the second embodiment in FIG. As shown in the figure, the terminal block 12 may have a staggered arrangement of the pressing connection portions Z in the lateral direction.
[0038]
According to the embodiment of FIG. 3, the same effects as those of the embodiment described with reference to FIGS. 1 and 2 can be obtained, and the arrangement of the electric wires with respect to the clamp-type connecting portion 4 can be given a degree of freedom.
[0039]
By the way, as the terminal block of the press-fit connection method, the terminal block shown in FIGS. 9A and 9B may be used in addition to the terminal block 20 of the press-fit connection method shown in FIGS. 5A and 5B. 20A is also known. In FIG. 9, the screw 1, the main body mold 2, and the press-fit connection portion 4 are the same as those of the terminal block of FIG.
[0040]
Here, the connection end push plate 5A is provided with a female screw hole, into which the screw 1 is screwed. On the other hand, the hole through which the screw 1 of the main body mold 2 passes is a so-called stupid hole. Therefore, by turning the screw 1, the connection end push plate 5A moves up and down in the press-fitting connection portion 4. At this time, the end of the wire to be connected is inserted above the connection end push plate 5A to remove the screw 1. By tightening, wiring can be obtained.
[0041]
Therefore, FIG. 10 shows a terminal block 12A according to a third embodiment of the present invention, which is a terminal block 10 of the screw connection type described with reference to FIG. 4 and a terminal block 20A of the press connection type shown in FIG. And the reference numerals are the same as those in the first embodiment described with reference to FIG.
[0042]
FIG. 11 is an enlarged view of a main part of a terminal block 12A according to the third embodiment. Here, reference numerals are the same as those in the first embodiment described in FIG. Detailed explanation is omitted.
[0043]
Further, FIG. 12 shows a fourth embodiment of the present invention, which is also a combination of the terminal block 10 of the screw connection type described with reference to FIG. 4 and the terminal block 20A of the push connection type shown in FIG. However, at this time, similarly to the embodiment of FIG. 3, the lateral arrangement of the press-fit connection portions Z is staggered.
[0044]
In any case, the terminal block according to the embodiment of the present invention requires that the screw-type connecting portion Y and the pressing-type connecting portion Z be in a conductive state. Are common, and this condition is satisfied.
[0045]
However, as an embodiment of the present invention, in addition to the method using the screw 1, in another method or in addition to the method using the screw 1, the connection between the screw-type connection part Y and the press-type connection part Z is made. Needless to say, conductivity may be obtained. For example, the hollow portion 4a of the press-fitting connection portion 4 is surrounded by a metal member, and this is integrated with the tightening pedestal portion 3 of the screw-type connecting portion Y. May be formed.
[0046]
As described above, according to the embodiment, for example, as a terminal block arranged or mounted on the inverter device, one terminal block can be used for both the screw connection method and the push connection method. For example, for the wires to be used for wiring, there is no restriction on the size of the rod terminal as a tip treatment applied to the wires, the wire diameter that can be wired without the tip treatment, and furthermore, the wires without the tip treatment Even if the wire diameter is large at the time of wiring, improvement in reliability can be easily realized.
[0047]
Therefore, if the terminal block according to this embodiment is provided, for example, on the user side of the inverter device, the connection end treatment of the electric wire to be used does not depend on the structure of the terminal block to which the electric wire is connected. As a result, it can be easily applied to existing wiring.
[0048]
Further, according to the terminal block of this embodiment, the manufacturer of the inverter device does not need to worry about the method of processing the end of the electric wire used by the user, so that the number of management steps can be reduced and the cost can be reduced.
[0049]
【The invention's effect】
ADVANTAGE OF THE INVENTION According to this invention, the size of the rod terminal as a front-end | tip process given to the wire to be wired and the diameter of the electric wire which can be wired without giving a front-end treatment are eliminated, Furthermore, when wiring the electric wire which does not give a front-end | tip treatment In this case, even when the wire diameter is large, improvement in reliability can be easily realized.
[Brief description of the drawings]
FIG. 1 is an explanatory view showing a first embodiment of a terminal block according to the present invention.
FIG. 2 is a detailed explanatory view showing a first embodiment of the terminal block according to the present invention.
FIG. 3 is an explanatory view showing a second embodiment of the terminal block according to the present invention.
FIG. 4 is an explanatory view showing an example of a terminal block of a screw connection type.
FIG. 5 is an explanatory view showing an example of a terminal block of a press-fit connection type.
FIG. 6 is an explanatory view showing another example of the terminal block of the screw connection type.
FIG. 7 is an explanatory view showing an example of a ring-shaped terminal and a U-shaped terminal used for processing a connection end of a wiring wire.
FIG. 8 is an explanatory view showing an example in which only a bar terminal and a core wire used for connection end processing of a wiring wire are used.
FIG. 9 is an explanatory view showing another example of the terminal block of the press-fit connection type.
FIG. 10 is an explanatory view showing a third embodiment of the terminal block according to the present invention.
FIG. 11 is a detailed explanatory view showing a third embodiment of the terminal block according to the present invention.
FIG. 12 is an explanatory view showing a fourth embodiment of the terminal block according to the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Screw 2 Main body mold 3 Tightening pedestal 4 Press-fastening connection part 4a Cavity part 5, 5A Connection end push plate 6 Washer 7A Ring type terminal 7B U-shaped terminal 8A Bar terminal 8B Core wire (part where wire coating is stripped)
Reference Signs List 10 Terminal block of screw connection type 11 Terminal block of other screw connection type 12 Terminal block 13 according to the first embodiment of the present invention Terminal block 12A according to the second embodiment of the present invention Third embodiment of the present invention Terminal block 13A according to the form Terminal block 20 according to the fourth embodiment of the present invention Terminal block 20A of the push-in connection type Terminal block Y of other press-in connection type Y Screw-in connection portion Z Press-in connection portion GY Screw-in connection type Connection space GZ Press-fit connection space

Claims (4)

In a terminal block that has both a screw-type connection and a press-type connection,
The screw of the screw connection type is inserted into the cavity of the press connection type,
A terminal block characterized in that the screw is used commonly for tightening an electric wire connection end in the screw-type connection portion and for pressing the electric wire connection end in the press-type connection portion. The terminal block according to claim 1,
The screw-fastened connection portion and the press-fastened connection portion are provided on one surface and the other surface of the female screw portion with the female screw portion to which the screw is screwed interposed,
A terminal block, wherein the female screw portion forms a fastening pedestal portion of the screw-type connection portion. In the terminal block according to claim 1 or 2,
A terminal block, wherein at least two of the screw-fastened connection portions and the press-fastened connection portions are arranged side by side orthogonally to the screwing direction of the screws. The terminal block according to claim 3,
The terminal block according to claim 1, wherein the screw connection portions are located on the same plane next to each other, and the press connection portions are located alternately on different planes next to each other.

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