JPH097655A - Terminal block - Google Patents

Abstract

PURPOSE: To reduce the number of constituting part items in the wiring connecting part of a terminal block, simplify the whole structure, improve the assembling property, and reduce the cost. CONSTITUTION: A terminal block body has substantially a mountain-like protruding part 12, and a terminal plate 13 is provided on the protruding part. The terminal plate 13 has a hole part 13a corresponding to the wiring connecting part of the terminal plate, and a terminal screw 15 is screwed to a screw hole 14a provided on the protruding part under the hole part, whereby the terminal end 1a of a wiring to be connected can be connected. The terminal screw is rotatably held on the top part of screw preventing metal fittings 16. This metal fittings have, on both sides, a pair of elastic piece parts 16a, 16a extended along inclined surfaces 12a, 12a on both sides of the protruding part. Parts 16b, 16b to be locked for regulating the dropping-out from the protruding part are provided on the tip of each elastic piece part so as to be lockable by locking parts 17, 17 provided on the protruding part.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a terminal block widely used in communication devices, electronic devices and the like, and more particularly to a wiring connecting portion structure for connecting connection ends of wirings to be connected in this terminal block.

[0002]

2. Description of the Related Art A terminal block of this type is used for collecting a plurality of wirings to be connected in one place and connecting the wirings to each other, and various types of structures have been proposed. For example, in Japanese Utility Model Laid-Open No. 62-175665, Japanese Utility Model Laid-Open No. 2-27666, Japanese Utility Model Laid-Open No. 2-124669, Japanese Utility Model Laid-Open No. 4-102568, terminals for fixing connected wires at respective wire connecting portions are disclosed. A terminal block having a screw falling prevention function (falling prevention function) is disclosed.

That is, in the above-mentioned conventional terminal block, the wiring connection portion provided with the screw drop prevention mechanism is provided with a terminal block body made of a synthetic resin material which is an electrically insulating material, and a conductive material provided on the terminal block body. Consists of a terminal plate, a metal fitting to prevent falling of the screw that is provided above the screw holes provided in the parts corresponding to each wiring connection part of this terminal board, and a washer on the top of the metal fitting to prevent the screw falling. The structure is provided with a terminal screw that is rotatably held by a spring and a spring member such as a compression coil spring that is arranged at an appropriate position so as to urge the screw drop prevention metal fitting upward. Here, the screw disengagement prevention metal fitting has an upper end portion held up and down by the terminal block body, and a lower end portion facing a space formed below the terminal plate.

The spring member disposed in this space is normally urged upward to hold the terminal screw in the raised position without dropping it, and to connect between the screw portion and the terminal plate. Insert a round terminal such as a round crimp terminal provided at the connection end of the wiring for use, and pinch the terminal between the terminal plate and the head of the terminal screw by tightening the screw as it is screwed into the screw hole. It can be electrically connected by fixing with. Further, when the screw is unscrewed, the screw head is lifted by the spring member so as to be separated from the terminal plate, and as a result, the terminal can be pulled out and removed.

[0005]

In the conventional structure as described above, the terminal screws are held in the screw drop preventing metal fittings supported on the upper part of the terminal block body so as to be able to move up and down, and the spring members are attached to them. Gives upward bias. As a result, a gap is normally formed between the tip of the screw part of the terminal screw and the terminal plate having the screw hole into which the screw is screwed. Hold the screw head or this screw by inserting a round terminal or the like on the connected wiring side into such a gap, and pressing down the terminal screw to screw it into the screw hole of the terminal plate. The terminal is sandwiched between the metal fitting and the terminal plate to be electrically connectable.

Therefore, in such a conventional structure,
The above-mentioned wiring connection part has a large number of constituent parts such as a terminal screw, a metal fitting for preventing screws from falling off, a spring member, and a terminal plate, and has a drawback that the structure is complicated and complicated to assemble, and the cost is high. It is desirable to take some measures that can solve such problems.

The present invention has been made in view of the above-described circumstances, and has a conventional spring retaining function for urging a screw holding metal fitting and a lifting member having a screw drop prevention function, and a screw fall prevention metal fitting itself. The purpose of the present invention is to obtain a terminal block that reduces the number of constituent parts of the entire terminal block by simplifying the structure, improves the assemblability, and reduces the cost.

[0008]

In order to meet such a demand, a terminal block according to the present invention is a terminal block main body made of an electrically insulating material having a substantially mountain-shaped convex portion in a wiring connecting portion, and a terminal block main body on the convex portion. A terminal plate made of a conductive material and a screw hole formed in a hole or protrusion provided at a position corresponding to the wiring connection portion are screwed to electrically connect the connection end of the wiring to be connected. It is equipped with a terminal screw and a screw fall prevention metal fitting that holds the threaded portion rotatably while hanging it from the top.A pair of elastic pieces are attached to the slopes on both sides of the convex portion from both sides of this screw fall prevention metal fitting. It is extended along with each other to apply an urging force to each elastic piece in the direction of pressing against the corresponding inclined surface, and to support this screw drop prevention metal fitting to the convex portion so that it can move up and down. Attach the end of each elastic piece of Part tip locked in the raised position spaced from the threaded hole of the terminal plate is provided with a locking portion for restricting the withdrawal of the projections of the screw falling-off preventing bracket.

Further, the terminal block according to the present invention has a terminal block body made of an electrically insulating material having a substantially valley-shaped concave portion in the wiring connection portion, a terminal plate made of a conductive material provided in the concave portion, and the wiring connection portion thereof. A terminal screw that is screwed into a hole provided at a position corresponding to the above or a screw hole provided in a member located below the terminal screw to electrically connect the connection end of the wire to be connected, and the screw part is hung from the top. It is equipped with a screw fall prevention metal fitting that holds it in a rotatable state, and a pair of elastic piece parts are extended from both sides of this screw fall prevention metal fitting along the inclined surfaces on both sides of the recess,
A biasing force is applied to each of the elastic pieces in the direction of pressing against the corresponding inclined surface, and the screw drop prevention metal fittings are supported so as to be able to move up and down in the recesses and the elastic properties of the screw fall prevention metal fittings are supported. A locking portion is provided for locking the tip of the one end at a rising position where the tip of the screw portion of the terminal screw is separated from the screw hole of the terminal plate and for restricting the withdrawal of the screw drop prevention fitting from the concave portion.

[0010]

According to the present invention, the screw falling prevention metal fitting having the terminal screw and assembled on the mountain-shaped convex portion of the terminal block body so as to be able to move up and down is generated by the inclined surface of the convex portion and the elasticity of the elastic piece portion. Due to the pushing-up force composed of friction and component force, the terminal plate is normally positioned at the raised position, and the terminal plate and the tip of the screw portion of the terminal screw are separated from each other. Insert the connection end of the wiring to be connected between this terminal board and the terminal screw, and screw it into the screw hole of the terminal board while pushing down the screw against the upward pushing force of the screw drop prevention metal fitting. Thus, the wiring for connection is electrically connected to the terminal board. On the contrary, by rotating the terminal screw so that it is unscrewed to the terminal plate, the tip of the screw part is lifted by the pushing force of the screw drop prevention metal fitting and separated from the terminal plate. , The wiring for connection can be removed.

Further, according to the present invention, the screw drop preventing metal fitting having the terminal screw and capable of moving up and down in the valley-shaped recess of the terminal block body is separated from the friction generated by the elasticity of the inclined surface of the recess and the elastic piece. Due to the pushing-up force composed of the force, the terminal plate is normally positioned at the raised position, and the terminal plate and the tip of the screw portion of the terminal screw are separated from each other. Insert the connection end of the wiring to be connected between this terminal board and the terminal screw, and screw it into the screw hole of the terminal board while pushing down the screw against the upward pushing force of the screw drop prevention metal fitting. Thus, the wiring for connection is electrically connected to the terminal board. On the contrary, by rotating the terminal screw so that it is unscrewed to the terminal plate, the tip of the screw part is lifted by the pushing force of the screw drop prevention metal fitting and separated from the terminal plate. , The wiring for connection can be removed.

According to the present invention, the screw falling prevention metal fitting is formed in a substantially downward U shape by the top portion for rotatably holding the terminal screw and the pair of elastic piece portions extending from both sides thereof. In addition, the openings are selectively formed in each elastic piece except for the side edges, and the cutout is made on the outer side or the elastic piece where the elastic piece does not exist in this screw drop prevention fitting. From the outside of the opening formed by the notch, the connection end of the wiring to be connected is inserted so as to be faced between the tip of the screw portion of the terminal screw and the terminal plate, so that the terminal plate is electrically connected.

[0013]

Embodiments (a), (b), (c) of FIG. 1 to (a-1,2), (b-1,2), (c-1,2) of FIG. 4 relate to the present invention. 1 shows an embodiment of a terminal block, FIG. 1 is a diagram showing a configuration of a main part, FIGS. 2 and 3 are diagrams showing a metal fitting for preventing a screw from dropping, and FIG. 4 is a connection diagram of connection ends of wirings to be connected. It is a figure which shows a process.

In these figures, reference numeral 11 is one wiring connecting portion in the terminal block body made of an electrically insulating material such as synthetic resin (not shown), and 12 is provided corresponding to this wiring connecting portion 11. It is a substantially mountain-shaped convex portion. A terminal plate 13 made of a conductive material is provided on the upper end of the convex portion 12 so as to extend to other wiring connection portions.
Reference numeral 14 in the figure denotes a nut member located below the terminal plate 13 and having a screw hole 14a embedded in the convex portion 12.

Reference numeral 15 is screwed into a hole portion (or screw hole) 13a provided at a position corresponding to the wiring connection portion of the terminal plate 13 to electrically connect the terminal 1a provided at the connection end of the wiring 1 to be connected. Terminal screw for, 16 is the screw portion 1 of this terminal screw 15.
It is a metal fitting for preventing screws from falling, which rotatably holds 5a hanging from the top. This screw drop prevention fitting 16
From both sides of the top of the elastic piece 16a, 16a
a is extended along the inclined surfaces 12a, 12a on both sides of the convex portion 12, and is formed in a generally downward U shape.
The elastic pieces 16a, 16a are provided with a biasing force in a direction in which they are brought into pressure contact with the corresponding inclined surfaces 12a, 12a, that is, inwardly toward each other in this embodiment. Such a screw drop prevention fitting 1
The natural spring shape of each elastic piece 16a, 16a in FIG. 6 is as shown in FIG. 1 (c).

Further, such a screw drop prevention fitting 1
Curved locked portions 16b and 16b are formed at the tips of the elastic pieces 16a and 16a in FIG. These locked portions 16b and 16b are the screw portions 15b of the terminal screw 15.
The tip is separated from the screw hole 13a of the terminal plate 13 in FIG.
In the state shown in (a) of FIG.
It is locked by locking portions 17, 17 which are recessed on the upper end side of 12a. As a result, the screw drop prevention fitting 16
The terminal block body is held so as to be able to move up and down while being capped above the convex portion 12 and is prevented from falling off.

Here, 15b is the head of the terminal screw 15, 1
Reference numeral 5c denotes a neck portion formed to have a small diameter, and this portion is rotatably held in a hole 16d provided at the top of the screw drop prevention fitting 16. Reference numeral 16e is an elastic piece formed by a slit in the circumferential direction of the hole 16d, and these elastic pieces 16e engage with the screw neck portion 15c and rotatably hold it. Further, in the figure, 18 and 18a are washers interposed between the head portion 15b of the screw 15 and the metal fitting 16.

Further, in FIGS. 2 and 3, reference numeral 16c is a punching opening formed in the elastic piece portions 16a, 16a by removing a side edge portion thereof, and allows elastic deformation in the elastic piece portion 16a. Further, as shown in FIG. 4, the portion also functions as an insertion port for inserting the terminal 1a of the wiring 1 for connection from the outside.

According to the above configuration, (a-1,
2), (b-1, 2), (c-1, 2), the terminal 1a provided at the connection end of the wiring 1 for connection can be connected and fixed. That is, the screw drop prevention metal fitting 16 that is assembled on the mountain-shaped convex portion 12 of the terminal block body so as to be able to move up and down and holds the terminal screw 15 is (a-1,
As shown in 2), the elastic piece 16a of the metal fitting 16 is normally
The terminal plate 13 and the screw portion 15b of the terminal screw 15 are pushed up by the pushing-up force due to the friction between the 16a and the inclined surfaces 12a and 12a and the component force, and are located at the elevated position in which the tip ends of the terminal plate 13 and the screw portion 15b of the terminal screw 15 are separated from each other.

In this example, unlike the above-mentioned FIG. 1, the elastic piece portions 16a, 16 of the screw drop preventing metal fitting 16 are different.
a Locking part 1 for locking the locked parts 16b, 16b at the tip of a
7 and 17, a terminal plate 13 provided on the upper end of the convex portion 12
It shows a case where both end portions of are projected outward and these projected portions are used.

The wiring connecting portion 11 in the above-mentioned state
As shown in (b-1) and (b-2) of the same figure, from the outside of the punching opening 16c formed in the elastic piece portions 16a, 16a, between the terminal plate 13 and the screw portion 15a of the terminal screw 15, a cover is formed. The terminal 1a which is the connection end of the connection wiring 1 is inserted.
Then, the terminal screw 15 is rotated while being pushed down against the spring action force of the elastic piece portions 16a, 16a upward of the screw disengagement prevention metal fitting 16 to rotate, and the hole 1b of the terminal 1a and the terminal plate 13 are rotated.
It is screwed into the screw hole 14a of the nut member 14 through the hole 13a.

Then, the screw 15 is completely screwed in, and the terminal 1a is sandwiched between the terminal plate 13 and the top of the screw drop prevention metal fitting 16 so that as shown in FIGS. The wiring 1 to be connected can be electrically connected to the terminal board 13. Here, in this state, the elastic piece portions 16a, 16a of the screw falling prevention metal fitting 16 are not
The two inclined surfaces 12a, 12a are gradually spread while descending, and as a result, they are fixed in a state where the upward biasing force is always accumulated.

Therefore, contrary to the above-described connection, the terminal screw 15 is rotated so as to be unscrewed from the terminal plate 13, so that the tip of the screw portion 15a is moved upwardly of the screw drop prevention metal fitting 16. Terminal plate 1
The terminal 1a, which is the connection end of the connection target wiring 1, can be removed by separating the terminal 1a from the terminal 3.

Here, in the embodiment shown in FIG. 4 described above, the lower side of the terminal plate 13 disposed at the upper end in the substantially mountain-shaped convex portion 12 corresponding to the wiring connection portion 11 in the terminal block body. The nut member 14 is incorporated in the
Although the screw 15 is fixed by screwing the screw portion 15a of the terminal screw 15 into the screw hole 14a of No. 4,
It may be configured as shown in FIGS. 5 (a), (b), and (c). That is, in the example of FIG. 5, the screw hole 13 b is formed in the terminal plate 13 by tapping, and the screw part 1 of the terminal screw 15 is formed.
This screw may be fixed by screwing 5a. In the figure, 12c is the terminal screw 15
The recessed portion is provided in the substantially mountain-shaped convex portion 12 so as to escape the screw portion 15a.

Further, in the embodiment shown in FIG. 4 mentioned above,
In the downwardly U-shaped screw drop prevention metal fitting 16 that is arranged above the substantially mountain-shaped convex portion 12 so as to be able to move up and down, the punching opening 16c of the elastic piece portion 16a is used to connect the connection end of the wiring 1 to be connected. Although the terminal 1a is connected to the terminal plate by being inserted from the outside, the present invention is not limited to this. That is, as shown in FIG.
As shown in (b) and (c), the elastic piece portions 16a, 16a
You may comprise so that it may be inserted from the outer side of the side where there is no.

An example of the terminal block 10 which employs the wiring connection portion 11 having the above-described structure is shown in FIGS. 7 (a) and 7 (b).
To explain this, the terminal block 10 has a pair of wiring connection portions 11 and 11 for connecting two connected wirings 1 and 1 (not shown). That is, the protrusions 12 and 12 having a substantially mountain shape in the terminal block body are formed in series, and the screw portions 13b and
Terminal plate 13 having 13b is provided in a suspended state. A partition wall portion 19 is formed between the convex portions 12 of the terminal block 10. In FIG. 7B, the illustration of the terminal board 13 is omitted.

In the terminal block 10 having such a structure, the connection of the wirings 1 and 1 to be connected by the screw drop prevention fittings 16 and 16 which are assembled to the wiring connection portions 11 and 11 so as to freely move up and down is shown in FIG. This can be performed as shown in a) and (b). In this example, one wire 1 is connected by inserting it from the outside of the side of the screw drop prevention metal fitting 16 where the elastic pieces 16a, 16a are not present and fixing it with a screw 15, and the other wire 1 of the metal fitting 16 of the metal fitting 16. The case where the punching opening 16c formed in the elastic piece portion 16a is connected by being inserted and fixed from the outside is shown.

However, in such a terminal block 10, the two wirings 1 and 1 are connected to the elastic piece portions 1 of the metal fittings 16 and 16, respectively.
It is free to insert from the side portions where 6a and 16a are not present, and to insert from the openings 16c and 16c of the elastic piece portions 16a. In addition, with respect to one wiring connection portion 11, the elastic piece portion 16a of the metal fitting 16 is inserted from a side portion of the opening portion 16c and a side portion where the elastic piece portion 16a does not exist, and one terminal screw 15 is used to connect the two simultaneously. You can also do it.

Further, the wiring connecting portion 1 having the above-mentioned structure.
9 to 11 show a case in which 1 is applied to a terminal block capable of connecting a plurality of pairs of wires. To explain this, 2 in the figure
Reference numeral 0 denotes a terminal block main body, and the above-mentioned substantially mountain-shaped convex portions 12 are projectingly provided on each wiring connection portion 11 of the main body, and the terminal plate 13 is laid over the convex portions 12 forming a pair thereof. Has been done. The convex portions 12 and 12 forming these pairs may be formed in series as shown in FIG.

Reference numeral 21 designates the above-mentioned pair of wiring connection portions 11,
A partition wall separating 11 from the other wiring connection parts 11, 11;
Reference numeral 22 is a wall portion provided so as to be interposed between the pair of wiring connection portions 11 and 11. Further, as shown in FIG. 11, 23 and 23 are gaps formed between the convex portion 12 of each wiring connection portion 11 and the partition walls 21 and 21 adjacent thereto, and are elastic piece portions 16a of the screw drop preventing metal fitting 16. , 16a are the parts that enter when connecting.

In this example, unlike the above-mentioned example, the terminal 1a, which is the connection end of the wiring 1 to be connected, is connected to the outside of the side portion of the metal fitting 16 for preventing the screws from falling off, where the elastic pieces 16a, 16a are not present. It shows the case where it is fixed by inserting it from only.

12 (a), 12 (b) and 13
9A and 9B show modified examples of the terminal block having a structure in which a plurality of pairs of wiring connection portions 11 and 11 shown in FIGS. That is, although the case where the terminal block body 20 for connecting a plurality of pairs of wirings is integrally formed is shown in FIG. 9 and the like described above, the present invention is not limited to this, and the terminal including the pair of wiring connecting portions 11 and 11 is formed. The base body 20A may be formed and appropriately combined to be arranged in parallel.

Here, in this embodiment, each terminal block body 2
0A has a combination concave portion 24 below one side portion and a combination convex portion 25 below the other side portion, and by alternately combining and fitting them, a required number of them are arranged in parallel. It is assembled and formed as a terminal block. The terminal block body 20A has only one partition wall 21. Therefore, when a plurality of side walls are provided side by side, the partition wall 21 does not exist at one end, but it is advisable to assemble a member having only the partition wall.

FIGS. 14 to 16 (a) and 16 (b) show another embodiment of the present invention, and show only a schematic structure corresponding to FIGS. 9 to 11 and the like. To explain this, in the figure, 30 is a terminal block body, 31 is a substantially valley-shaped recess provided in the terminal block body 30 so as to correspond to each wiring connecting portion 11, and 32 is provided upright on the bottom of this recess 31. Terminal screw 15 provided
Is a nut portion having a screw hole 32a into which the screw portion 15a is screwed, and the terminal plate 13 is provided on the nut portion 32. Of course, the screw hole 32a of the nut portion 32 may be a mere recess, and the screw hole 13b may be formed in the terminal plate 13.

Reference numerals 31a and 31a denote inclined surfaces on both sides of the concave portion 31,
Reference numerals 33a and 33a denote elastic pieces of the screw drop prevention fitting 33 extending along the locking piece 33b, which are provided at the tip of the elastic piece 33b.
As is clear from FIGS. 15 (a), (b), and (c), locking portions 34, 34 for locking 33b at the raised position may be provided on a part of the inclined surfaces 31a, 31a. Further, the elastic piece portions 33a, 33a are provided with a biasing force in a direction in which they are pressed against the inclined surfaces 31a, 31a.

Reference numeral 35 is a partition wall for partitioning the wiring connection portions 11, 11 of each pair, and 36 is a partition wall portion provided between the wiring connection portions 11, 11 of each pair. In addition, the metal fitting 33 of this embodiment
In the above, the wiring for connection (not shown) is inserted from the side portion where the elastic piece portions 33a, 33a do not exist.

With this structure as well, similar to the above-described embodiment, the terminal (not shown) which is the connection end of the wiring to be connected is inserted, and the screw 15 acts on the metal fitting 33 for preventing the screw from falling off. The wire to be connected can be electrically connected to the terminal plate 13 by being screwed into the screw hole 13b of the terminal plate 13 or the screw hole 32a of the nut portion 32 while pushing down against the force. Further, it is also possible to freely employ such a wiring connecting portion 11 in a terminal block formed separately so as to form each pair, which is substantially the same as in FIG.

According to the structures of the respective embodiments as described above, the component for the whole terminal block is provided by providing the screw drop preventing metal fitting itself with the function of the spring for urging the screw drop preventing member as in the prior art. The number of points can be reduced, the structure can be simplified, the assemblability can be improved, and the cost can be reduced.

The present invention is not limited to the structure of the above-described embodiment, and the shape, structure, etc. of the terminal block, particularly each part of the wiring connecting portion 11, may be appropriately modified or changed. For example, in the above-described embodiment, the case where the locking portions of the screw falling prevention metal fittings 16 and 33 are formed by using the convex portions 12, the inclined surfaces 12a and 31a of the concave portions 31 or the terminal plate 13 has been described. The structure is not limited, and any structure may be used as long as it is possible to regulate upward escape at an appropriate location.

Further, in the above-mentioned embodiment, the terminal screw 1
The case where the neck portion 15c formed to have a small diameter of 5 is rotatably held by the screw drop preventing fittings 16 and 33 has been shown, but the present invention is not limited to this. The point is that the neck of the screw 15 can be rotatably held on the top of the metal fitting. Further, in the above-described embodiment, the terminal is illustrated as the connection end of the connection target wiring, but the present invention is not limited to this, and an appropriate terminal may be used, or the wiring end may be directly connected.

[0041]

As described above, according to the terminal block of the present invention, the terminal plate provided on the substantially mountain-shaped convex portion of the terminal block body or the terminal screwed into the screw hole of the lower convex portion. A metal fitting for retaining screws is provided, and elastic piece portions on both sides of the metal piece are extended along the inclined surfaces on both sides of the convex portion, and each elastic piece portion is urged to press against the inclined surface of the convex portion. In addition to the above, the locking portion for supporting the screw drop preventing metal fitting so as to be able to move up and down with respect to the convex portion and locking at the raised position is provided. It has an excellent effect.

That is, according to the present invention, the terminal screw is screwed into the screw hole of the terminal plate or the convex portion below the terminal plate to electrically connect the connection end of the wiring to be connected by the terminal screw and the terminal plate. Can be connected to the screw terminal, and the function of the spring that biases the screw drop prevention member as in the past is provided in the screw drop prevention metal fitting itself, reducing the number of component parts of the entire terminal block and simplifying the configuration and assembling Can be improved and cost reduction can be achieved.

Further, according to the present invention, there is provided a screw falling prevention metal fitting for holding a terminal screw which is screwed into a screw hole of a terminal plate provided in a substantially valley-shaped concave portion of a terminal block body or a member provided below the terminal plate. A pair of elastic pieces are extended from both sides of the screw drop prevention metal fitting along the inclined surfaces on both sides of the recess, and a biasing force is applied to each elastic piece in a direction of pressure contact with the corresponding inclined surface. In addition to the above, by providing the locking portion between the concave portion and the concave portion, it is possible to exhibit the same operational effect as in the case described above. For example, when such a recess and a screw fall prevention metal fitting that moves up and down in the recess are used, the locking portion that locks at the raised position of the metal fitting is provided on the partition wall with the adjacent wiring connection portion in the terminal block body. It can be provided, and there is an advantage that the terminal block having a plurality of rows of wiring connection portions can be downsized.

Further, according to the present invention, when the connecting end of the wire to be connected is inserted into the metal fitting for preventing the screw from coming off which has a substantially downward U shape to electrically connect to the terminal board, the wire connecting end is In the screw drop prevention metal fitting, a pair of elastic pieces are not formed on the outside of the opening, or on each elastic piece, the openings are selectively cut out except for the side edges, and are inserted from the outside of the opening. As a result, there is an advantage that the wiring direction to each wiring connection portion of the terminal block can be arbitrarily set and the wiring and other wiring on the terminal block can be freely connected.

[Brief description of drawings]

FIG. 1 shows an embodiment of a terminal block according to the present invention,
(A) is a cross-sectional view of a wiring connection part which is a main part, (b) is a cross-sectional view showing a state in which a terminal provided at the tip of the wiring is inserted and connected to the wiring connection part of (a), and (c) is the present invention. It is a figure which shows the spring natural shape of the spring piece for screw raising / lowering which has the spring function which characterizes.

FIG. 2 shows a spring piece for raising and lowering a screw having a spring function in the terminal block according to the present invention, (a) showing a state in which the spring piece and the terminal screw are assembled, and (b) a plan view of the spring piece. is there.

FIG. 3 shows a state in which a terminal screw is assembled to a screw lifting spring piece having a spring function that characterizes the present invention,
(A) is a front view, (b) is a side view, and (c) is a plan view.

FIG. 4 is a view for explaining a connection state of a terminal which is a connection end of a connected side wiring to a wiring connection portion in a terminal block according to the present invention, and includes (a-1, 2), (b-1) ，
2) and (c-1, 2) are a sectional view and a plan view showing the respective states.

5 is a view for explaining a modified example of the screwing portion of the terminal screw for connecting the terminal which is the connection end of the wiring on the connected side to the wiring connecting portion in the terminal block, and FIG.
It is sectional drawing corresponding to 1), (b-1), and (c-1).

FIG. 6 is a view for explaining a modified example of the connection state of the terminal, which is the connection end of the connection-side wiring with respect to the wiring connection portion in the terminal block, and is shown in FIGS. ),
It is a top view corresponding to (c-2).

7A and 7B show a terminal block structure including a wiring connecting portion that characterizes the present invention, FIG. 7A is an overall perspective view, and FIG. 7B is an exploded perspective view in which a terminal plate is omitted.

8A and 8B are perspective views for explaining a wiring connection state with respect to the terminal block illustrated in FIG. 7.

FIG. 9 is a perspective view showing a schematic configuration of an entire terminal block using a wiring connecting portion that characterizes the present invention.

10 is a cross-sectional view illustrating a pair of wiring connection portions in FIG.

FIG. 11 is a cross-sectional view showing movements of the screw lifting spring pieces at the wiring connection portion in FIG. 9 as (a), (b), and (c).

FIG. 12 shows another embodiment of the terminal block according to the present invention,
(A) is a perspective view showing one wiring connection part which is a component of a separate type terminal block, and (b) is an exploded perspective view in which a terminal plate is omitted.

13A and 13B are views for explaining the terminal block structure in the embodiment shown in FIG. 12, where FIG. 13A is a sectional view and FIG. 13B is a plan view of the terminal block.

FIG. 14 shows another embodiment of the terminal block according to the present invention,
It is a perspective view showing a schematic structure of the whole terminal block.

FIG. 15 is a cross-sectional view showing movements of the screw lifting spring pieces at the wiring connection portion in FIG. 14 as (a), (b), and (c).

16A and 16B show the wiring connection portion in FIG. 14, where FIG. 16A is a sectional view and FIG.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Wiring for connection, 1a ... Connection end (terminal), 1b ... Hole part, 10 ... Terminal block, 11 ... Wiring connection part, 12 ... Substantially mountain-shaped convex part, 12a ... Slope, 12c ... Recessed part, 13 ... Terminal board,
13a ... hole, 13b ... screw hole, 14 ... nut member, 1
4a ... Screw hole, 15 ... Terminal screw, 15a ... Screw part, 15
b ... Head, 15c ... Neck, 16, 33 ... Screw fall prevention metal fittings, 16a, 33a ... Elastic piece, 16b, 33b ... Locked part, 16c ... (Punching) opening, 17, 34 ... Lock Part, 18 ... Washer, 19 ... Partition wall part, 20, 20A
... Terminal block body 21, 35 ... Partition wall, 22, 36 ... Wall portion,
24 ... Combination concave portion, 25 ... Combination convex portion, 3
0 ... Terminal block main body, 31 ... Substantially valley-shaped recessed portions, 31a, 31a
... inclined surface, 32 ... nut portion, 32a ... screw hole.

Claims (4)

[Claims] 1. A terminal block main body made of an electrically insulating material having a substantially mountain-shaped convex portion in each of the wiring connection portions, and a terminal plate made of a conductive material provided on the paired convex portions of the terminal block main body. , A terminal screw for screwing into a hole provided at a position corresponding to the wiring connecting portion of the terminal board or a screw hole formed in the convex portion to electrically connect the connection end of the wiring to be connected, and It is equipped with a screw drop prevention metal fitting that holds the screw part of the terminal screw rotatably in a state of hanging down from the top.
The protrusions are extended along the inclined surfaces on both sides to apply a biasing force to each of the elastic pieces in the direction of pressing against the corresponding inclined surfaces. The terminal block is provided with a locking portion that is supported so as to be able to move up and down and that locks at a raised position. 2. A terminal block main body made of an electrically insulating material having substantially valley-shaped recesses in each of the wiring connection parts, a terminal plate made of a conductive material provided in a paired recess of the terminal block main body, A terminal screw for screwing into a hole provided at a position corresponding to the wiring connecting portion of the terminal board or a screw hole provided in a member facing the hole to electrically connect the connection end of the wiring to be connected, and It is equipped with a screw drop prevention metal fitting that holds the screw part of the terminal screw rotatably in a state of hanging down from the top.
Extending along the inclined surfaces on both sides of the concave portion, each elastic piece portion is provided with a biasing force in a direction of press-contacting the corresponding inclined surface, and at the same time, the screw drop preventing metal fitting is attached to the concave portion. A terminal block, characterized in that it is provided with a locking portion that supports it so that it can move up and down and locks it in a raised position. 3. The terminal block according to claim 1 or 2, wherein the screw drop prevention metal fitting arranged above the wiring connection portion of the terminal plate so as to be able to move up and down has a top portion for rotatably holding the terminal screw. And a pair of elastic pieces extending from both sides thereof are formed in a substantially downward U-shape, and the connecting end of the wire to be connected is on the side where the elastic piece is not present in the screw drop prevention metal fitting. A terminal block, which is configured to be inserted between the tip of the screw part of the terminal screw and the terminal plate from the outside of the part. 4. The terminal block according to claim 1 or 2, wherein the screw drop prevention metal fitting arranged above the wiring connection portion of the terminal plate so as to be able to move up and down is a top portion that rotatably holds the terminal screw. And a pair of elastic pieces extending from both sides thereof are formed in a substantially downward U-shape, and each elastic piece has an opening notched except for a side edge. The connection end of the screw from the outside of the side where the elastic piece is not present in the metal fitting for preventing the screw drop or the opening outside the notch formed in the elastic piece, from the screw tip of the terminal screw to the terminal plate. A terminal block that is configured to be inserted between the terminals.