JPH01200575A - Electric wire connector - Google Patents

Abstract

PURPOSE:To perform communization of a terminal bloc and sure connection by a method wherein a conductive member is inserted through an inserting- through hole for being fixed to a conductive member housing part by a closely fixing means in the conductive member inserting-through direction among an engaging thickness adjusting means, a connecting means and a terminal bloc. CONSTITUTION:A nut 32 of a connection member 3 is mounted on a nut seat part of each conductive member housing part 11. Next, an insertion part 21 of a conductive plate 2 is inserted through an insertion hole 15 of a terminal bloc 1 and an engaging projection part 25 and an inner wall of the insertion hole 15 are pressure-welded, while pressing a conductive plate 2 into each inserting-through hole 15. And a bolt 31 is inserted into a mounting hole 23 through a washer 33 and a washer 34 is screwed into a nut of a sealing hole 16 so as to make it a connection part. Further, similarly the bolt 31 is inserted into a mounting hole 24 through the washers 33 and 34 to screw into a nut 32 of an inserting-through hole 17 for being made the connection part. In this way, the terminal bloc can be communized while obtaining the sure connection.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a wire connector having a structure in which metal fittings are attached to a molded terminal block without insert molding the metal fittings into the terminal block.

[Prior Art and its Problems] A wire connector is formed by attaching a conductive plate to a terminal block molded from an insulating material such as synthetic resin. A common method for attaching a conductive plate to a terminal block is so-called insert molding, in which a conductive plate, embedded nuts, etc. are set in a mold beforehand when the terminal block is molded, and then they are embedded in the terminal block after molding. It is true.

The molds used for insert molding require work to set the conductive plates and embedded nuts in predetermined positions, making the molds complex and requiring time to mold. In addition, the precision of each part must be improved so that the mold does not adhere to the fitting parts and screwed parts of the conductive plate and the embedded nut, resulting in an increase in manufacturing costs.

In order to solve these problems, a terminal device was developed in which the contact piece and connecting fittings were attached using bolts and nuts without using insert molding.
This is disclosed to the public. In a terminal device with this structure, unless the engagement recess, seat, and engagement groove provided on the terminal block are tightly fitted with the L-shaped conductive plate attached to the terminal block, the conductive plate will not fit into the terminal block. There is a risk that the parts may come off and fall off, and to prevent this, precision of each part is required. In addition, in order to accommodate changes in the rated capacity, it is necessary to change the thickness of the conductive plate, but as mentioned above, the conductive plate needs to be tightly fitted with the terminal block, so the thickness of the conductive plate must be changed. If the plate thickness changes, the dimensions of each part of the mounting part must be changed accordingly, and terminal blocks must be manufactured according to the rated capacity corresponding to each plate thickness.

Further, in conventional wire connectors, including the wire connector described in the above-mentioned publication, a groove is used in which fixing of the conductive plate and tightening at the time of wire connection are simultaneously performed using the same bolt. For this reason, the terminal block may crack due to excessive tightening during wire connection, and in order to prevent this, it is necessary to take measures such as increasing the strength of the terminal block. Further, due to the above-mentioned reason, there was also a problem in that it was not possible to tighten the wires with sufficient tightening force when connecting the wires.

[Objective of the present invention] The present invention does not require much precision in each part when attaching a conductive member to a terminal block, so that it can be attached even if the precision is slightly low, and it also enables sufficient tightening at the time of wiring connection. It is an object of the present invention to provide a wire connector in which a common terminal block can be used even when dimensions such as the plate thickness of a conductive member are changed due to a change in rated capacity.

[Configuration of the present invention] The configuration of the present invention taken to solve the above problems and achieve the object is as follows. That is, in the present invention, two or more conductive member housing portions that are insulated from each other are arranged in parallel,
Both sides of this conductive member storage part are opened, and a terminal block is formed with an insertion hole penetrating between the openings: a connecting means for connecting a terminal of an electric wire to both ends, and a conductive member. a conductive member having an engaging thickness adjusting means for regulating movement in the thickness direction within the insertion hole; the gap in the insertion hole is formed to be larger than the thickness of the conductive member; The electric wire connector is a wire connector in which a conductive member is inserted through the conductive member and fixed to the conductive member accommodating portion by contact fixing means in the conductive member insertion direction between the engagement thickness adjusting means, the wire connection means, and the terminal block.

As means for fixing the conductive member to the conductive member accommodating portion, for example, (1) an engaging protrusion is formed at a position of the conductive member to be accommodated in the insertion hole, and a gap between the insertion holes is filled with a conductive member; Means for press-fitting and fixing the conductive member into the insertion hole, the means being formed to be larger than the thickness of the member and slightly smaller than the engagement thickness including the engagement protrusion.

(2) The connection means for connecting the terminals of the electric wires is a tightening screw, and the floor part of the conductive member accommodating part corresponding to the tightening screw is
For example, a means for fixing the conductive member by accommodating a nut screwed into the tightening screw and providing at least one locking hole for regulating the movement of the conductive member in the direction of removal. In addition, (1) (2) above
Fixing means can also be used in combination.

The means for fixing the conductive member to the conductive member accommodating portion is determined by the frictional force between the engaging protrusion of the conductive member and the insertion hole of the terminal block, or by the tightening screw and the locking hole. In the case where the conductive member and the terminal block are fixed, the dimensional accuracy of each part of the conductive member and the terminal block is not required so much, and even if the precision of the locking hole and the conductive member is not very good, it can be fixed.

The shape of the conductive member is not particularly limited, and may be formed in various ways depending on the direction of the wire connections, for example, a straight long plate shape or an L plate shape. The terminal block is molded to match the shape of this conductive member.

Even when the thickness of the conductive member is changed to correspond to a change in the rated capacity, the height from the bottom of the conductive member to the top of the engagement protrusion, that is, the engagement thickness, is constant.

For example, when a conductive plate is used as the conductive member, if the rated capacity is large, the thickness of the conductive plate becomes thick, and the protrusion height from the top surface of the conductive plate to the top of the engagement protrusion is set low. Also,
When the rated capacity is small, the thickness of the conductive plate is reduced, and the protrusion height from the upper surface of the conductive plate to the top of the engagement protrusion is set high. In either case, the height from the bottom surface of the conductive plate to the engagement protrusion, that is, the engagement thickness is constant. As a result, conductive plates of different thicknesses corresponding to each rated capacity can be attached to the insertion holes of the same hole height, so the terminal block can be shared.

Fixing means for fixing the terminals of the electric wires are provided at both ends of the conductive member. As the fixing means, a mounting hole is usually formed in the conductive member, and a tightening member such as a bolt, nut, washer, etc. is mounted in the mounting hole. Alternatively, it is also possible to attach the head of the bolt to the locking hole, attach a wire terminal, washer, etc. to the protruding threaded part of the bolt, and tighten it with a nut. Incidentally, the structure of the fixing means is not limited to this, and a structure can also be provided in which a thread is cut in the mounting hole and a bolt is screwed into the mounting hole so that a nut is not used. In this case, the tip of the bolt will be inserted into the latching hole or insertion hole of the conductive member accommodating part, and the size and shape of the latching hole of the conductive member accommodating part will also correspond to this. .

[Example] The present invention will be described in more detail based on an example shown in the drawings.

Figure 1 is a sectional view of the wire connector, Figure 2 is a front view of the terminal block, Figure 3 is a bottom view, Figure 4 is a sectional view taken along line A-A in Figure 2, and Figure 5 is a front view of the conductive plate. FIG. 6 is a side view.

Reference numeral 1 denotes a terminal block, which is made of synthetic resin, which is an insulator. In the terminal block 1, conductive member accommodating portions 11 are arranged in parallel and partitioned by partition walls 10 and provided for each phase. Each conductive member accommodating portion 11 has a structure in which an upper wire connection space 12 and a lower wire connection space 13 provided above and below are connected through an insertion hole 15.

The back wall 101 of the upper wiring space 12 has a back protrusion 14 on the back side.
A latching hole 16 is formed by providing a latching hole 16. The latching hole 16 is
It consists of a nut seat 161 into which a nut 32 of a wiring member (to be described later) can be mounted with a little margin without rotating, and a bolt relief hole 162 connected to the back of the nut seat 161.

An insertion hole 17 is provided in the upper wall 102 of the lower wiring space 13 so that the axis thereof is perpendicular to the above-mentioned latching hole 16 . Like the locking hole 16, the insertion hole 17 also includes a nut seat 171 and a bolt relief hole 172.

Note that a mounting portion 18 is provided protruding from the front surface of the terminal block 1 to serve as a fixing portion when installed in a wiring duct, and the insertion hole 17 is formed so as to be located on the back side of the mounting portion 18. . Reference numeral 19 is a screw hole for attaching the terminal block 1 to a unit frame or the like.

Insertion hole 1 connecting upper wiring space 12 and lower wiring space 13
5 is formed such that the gap between the holes is large on the lower wiring space 13 side and becomes slightly smaller as it goes toward the upper wiring space 12 side.

A conductive plate 2 is attached to each insertion hole 15. As shown in the figure, the conductive plate 2 has an L-shape bent at a substantially right angle, with a long side serving as an insertion portion 21 and a short side serving as a hook portion 22.

A mounting hole 23 is provided on the end side of the insertion portion 21,
A mounting hole 24 is similarly formed on the end side of the hooking part 22. Each mounting hole 23, 24 is provided at a position corresponding to the above-mentioned latching hole 16 and insertion hole 17 during insertion, and the mounting hole 2
The wiring member 3 is attached to 3.24.

Furthermore, a circular engagement protrusion 25 is provided approximately at the center of the insertion portion 21 of the conductive plate 2 by stamping.

The protrusion height of the engagement protrusion 25 is set to such a height that the conductive plate 2 is fitted into the insertion hole 15 somewhat tightly when the conductive plate 2 is inserted into the insertion hole 15 . The conductive plate 2 has a different thickness depending on the rated capacity, but the plate thickness and the engaging protrusion 25
Since the engagement thickness, which is the sum of the protrusion heights, is constant, even plates with different thicknesses can be inserted into the same insertion hole 15, and the terminal block 1 can be shared.

(Function) The mounting structure and function of each conductive plate 2 and terminal block 1 will be described together with reference to the drawings.

The wiring member 3 includes a bolt 31, a nut 32, and a spring washer 33.
, washers 34, and mounting holes 23. at both ends of the conductive plate 2.
24.

First, the nut seat portion 161.17 of each conductive member housing portion 11
Attach the nut 32 of the wire connection member 3 to 1. Next, the insertion portions 21 of the conductive plate 2 are inserted into the insertion holes 15 of the terminal block 1, and the engaging protrusions 25 and the inner walls of the insertion holes 15 are brought into pressure contact with each other, so that the conductive plate 2 is press-fitted into each insertion hole 15. As a result, each conductive plate 2
is temporarily fixed to the conductive member accommodating portion 11 of the terminal block 1,
The nut 32 is also held down by the insertion portion 21 and the hooking portion 22 of the conductive plate 2, and cannot be removed from the nut seat portion 161, 171. Then, the bolt 31 is inserted into the mounting hole 23 via the spring washer 33 and the washer 34, and is screwed onto the nut 32 of the locking hole 16 to form a connection portion. As a result, the conductive plate 2 is fixed to the wire connection member 3, and due to the fitting contact between the wire connection member 3 and the locking hole 16, it cannot move in the insertion direction and is prevented from being removed from the insertion hole 15. Similarly, the bolt 31 is connected to the spring washer 33 and washer 3.
4 into the mounting hole 24, and then tighten the nut 3 in the insertion hole 17.
2 to form a connection part. In this way, the conductive plate 2 is fixed to the terminal block 1 by contacting the portion of the conductive plate 2 where the engaging protrusion 25 is provided with the inner wall of the insertion hole 15 and the connection member 3.
This is achieved by abutting the conductive plate with the latching hole 16 in the insertion direction of the conductive plate, and the tightening force due to the screwing of bolts, nuts, etc. of the connection part is not used, and the tightening force is used only for connecting the lead wire. Therefore, unlike conventional wire connectors, the structure does not use the same bolt to fix the conductive plate and connect the wires at the same time.
There are no problems such as cracks in the terminal block due to over-tightening when connecting wires. Moreover, since there is no need to worry about this, there is an advantage that the tightening force can be increased when connecting wires.

Attach the heavy wire connector to a predetermined position in the wiring duct (not shown), then sandwich the lead wire terminal (not shown) between the washer 34 and the conductive plate 2, tighten the bolt 31, and connect the lead wire. do. At this time, the tip of the bolt 31 is accommodated in the bolt escape hole 162° 172 and does not get in the way.

If the rated capacity changes later, the thickness of the conductive plate 2 must be changed, but since a common terminal block 1 can be used, only the conductive plate 2 needs to be replaced. There is no need to replace the wire connector until the end, and the cost can be reduced by using the same parts, and the cost of the wire connector as a whole can be lowered by making it easier to manage the location.

It should be noted that the present invention is not limited to the illustrated embodiment, and many modifications can be made within the scope of the claims.

[Effect of the invention] The present invention has the above configuration and has the following effects.

(1) By fixing the terminal block to the conductive member accommodating portion using an insertion fixing means provided with a protrusion that corrects and stabilizes the engagement thickness of the conductive member, the terminal block can be made common. Therefore, there is no need to manufacture many types of terminal blocks to match the thickness of the conductive plate, and the total cost can be reduced and stock management is easy. Further, even if the rated capacity is changed later, only the conductive member needs to be replaced, and there is no need to replace the terminal block as in the conventional case, resulting in an inexpensive electric wire connector.

(2) From the viewpoint of manufacturing a terminal block, it is possible to use the terminal block in insert molding by providing the insertion fixing means and the abutment fixing means in the direction of insertion of the conductive member between the wiring member and its accommodation portion. Is there a shape that looks like this? l It is not necessary to use complicated molds, and the number of steps required for molding can be kept to the same level as in the case of general mold molding, so manufacturing costs can be lowered.

(3) The fixing of the conductive member to the terminal block and the tightening of the bolts, nuts, etc. of the connection part that connects the terminals of the electric wires are separate and independent, and the tightening force is used only for connecting the electric wires. That is, unlike conventional wire connectors, the structure does not use the same bolt to simultaneously fix the conductive plate and connect the wires, so there is no problem such as cracks in the terminal block due to excessive tightening during wire connection. Moreover, since there is no need to worry about this, there is an advantage that the tightening force at the time of wiring can be increased and the wiring can be reliably connected.

[Brief explanation of the drawing]

The drawings illustrate embodiments of the invention, Figure 1 is a cross-sectional view of the wire connector, Figure 2 is a front view of the terminal block. Figure 3 is a bottom view; Figure 4 is a sectional view taken along line A-A in Figure 2; Figure 5 is a front view of the conductive plate. FIG. 6 is a side view. 1: Terminal block 11; Conductive member housing part 15: Insertion hole 16: Hanging hole 2: Conductive plate 25: Engagement protrusion 3: Wiring member

Claims (1)

[Claims] 1. Two or more electrically conductive member accommodating portions that are insulated from each other are arranged in parallel, both sides of the electrically conductive member accommodating portions are open, and there is a conductive member accommodating portion that penetrates between the openings. a terminal block in which an insertion hole is formed; a conductive member having a connection means for connecting a terminal of an electric wire at both ends thereof and an engagement thickness adjustment means for regulating movement of the conductive member in the thickness direction within the insertion hole; ; the gap in the insertion hole is formed to be larger than the thickness of the conductive member, and the conductive member is inserted into the insertion hole to connect the engagement thickness adjusting means, the connection means, and the terminal block. An electric wire connector characterized in that it is fixed to a conductive member accommodating portion by contact fixing means in the conductive member insertion direction. 2. An engaging protrusion is formed in the conductive member at a position accommodated in the insertion hole, and the gap between the insertion holes is larger than the thickness of the conductive member and smaller than the engagement thickness including the engagement protrusion. 2. The electric wire connector according to claim 1, wherein the electric wire connector is formed slightly smaller and is fixed by press-fitting a conductive member into the insertion hole. 3. The connection means for connecting the terminals of the electric wires is a tightening screw, and a nut that is screwed into the tightening screw is accommodated in the floor of the conductive member accommodating part corresponding to the tightening screw, and a hook is provided to restrict the movement of the conductive member in the direction of withdrawal. 2. The electric wire connector according to claim 1, further comprising at least one stopper hole.