JPH0935774A - Fixing device for circular conductive terminal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a terminal block by which the attachment of a circular conductive terminal such as a terminal for power source to a receiving terminal and the removal from it can be performed easily. SOLUTION: A terminal block 1A is mounted with a conductive plate 5 where in a hole 5A is made at the center, and a slip out preventive plate 20 wherein a through hole 21 is bored at the center is fixed to the terminal block 1A equipped with a receiving terminal 3 composed of a bottom 5 wherein internal thread 6A is made and sidewalls 7 erected from both ends and the tops of both these sidewalls. A terminal fixing screw 10 is inserted into the through hole, and a terminal pressing plate 13 is screwed to the middle part of the male screw body 11, whereby an attached circular conductive terminal T is pressed and fixed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of an annular conductive terminal fixing device for fixing an annular conductive terminal connected to a tip of a power cable or the like used mainly for a power terminal to a terminal block such as a power terminal block. It is a thing.

[0002]

2. Description of the Related Art First, a conventional fixing device for an annular conductive terminal will be described with reference to FIGS. 8 is 4
FIG. 2A shows an overall view of a terminal block having a large number of receiving terminals to which a cable of a book is fixed. FIG. A shows a perspective view thereof, and FIG. B shows an annular conductive terminal fixed at the tip of the cable. 9 is an enlarged perspective view of one receiving terminal portion for explaining a fixing method for fixing the annular conductive terminal to one receiving terminal of the terminal block shown in FIG. 8, and FIG. 10 is a partially enlarged sectional side view showing a state in which the annular conductive terminal is fixed to one receiving terminal of the terminal block shown in FIG.

In a conventional terminal block 1, a central partition wall 2 is formed in the central portion to separate the left and right sides, and a plurality of receiving terminal portions 3 are formed on both sides of the central partition wall 2 at equal intervals. It is configured. As shown in FIG. 9, each receiving terminal portion 3 has a bottom portion on which a conductive plate 5 having a hole 5A having a diameter larger than a diameter of a male screw body 11 of a terminal fixing screw 10 described later is attached and fixed in a central portion. 6 and side walls 7 standing upright from both ends of the bottom portion 6. The female screw 6 into which the male screw body 11 is screwed in the central portion of the bottom portion 6
A (FIG. 10) is formed. Also, the female screw 6A
A screw head 11 having a diameter capable of being screwed into a terminal, and a terminal fixing screw 10 having a screw head 12 having a diameter larger than the diameter of the male screw body 11 formed on the upper end thereof, and a screw fixing screw 10 into the male screw body 11 of the terminal fixing screw 10 to have a predetermined height. A terminal pressing plate 13 fixed at a position is prepared.

On the other hand, an example of the cable C to be fixed to the receiving terminal portion 3 of the terminal block 1 having such a structure is shown in FIG. 8B. An annular conductive terminal T having a hole H having a diameter slightly larger than the diameter of the screw head 12 but smaller than the diameter of the screw head 12 is connected by means such as soldering or caulking.

Next, an ordinary fixing method for connecting and fixing the cable C to each receiving terminal portion 3 of the terminal block 1 having such a structure will be described. First, the ring-shaped conductive terminal T is inserted and placed on the conductive plate 5 fixed to the bottom portion 6 from the side opening of the receiving terminal portion 3, and the male screw body of the terminal fixing screw 10 protruding below the terminal pressing plate 13. 11 is a hole H of the annular conductive terminal T
Then, the cable C is passed through the hole 5A of the conductive plate 5 and then screwed into the female screw 6A formed on the bottom portion 6 to electrically connect and fix the cable C to the terminal portion 3. Cable C
When removing from the receiving terminal portion 3, all of the terminal fixing screws 10 are removed by a driver (not shown), and then the annular conductive terminal T is removed from the receiving terminal portion 3 and then removed.

[0006]

In such a prior art fixing device for the annular conductive terminal, the annular conductive terminal T is structurally constructed.
It often happens that the terminal fixing screw 10 is dropped when the terminal fixing screw 10 is attached to or removed from the receiving terminal portion 3. Further, the annular conductive terminal T cannot be removed unless all the terminal fixing screws 10 are removed. An object of the fixing device for an annular conductive terminal of the present invention is to eliminate these problems, and it is very easy to attach the annular conductive terminal to the receiving terminal portion or remove it from the receiving terminal portion. The purpose of the present invention is to obtain a fixing device for a ring-shaped conductive terminal that can be used for the above.

[0007]

Therefore, in the fixing device for an annular conductive terminal according to the present invention, a bottom portion on which a conductive plate having a hole formed in the central portion thereof can be mounted and side walls standing upright from both ends of the bottom portion are provided on a substrate. At the upper ends of the both side walls of the terminal block that constitutes the receiving terminal part, a square removal prevention plate having an annular hole in the center is fixed, and the through hole of the removal prevention plate is inserted from above. A screw head having a diameter larger than the diameter of the through hole and a male screw body having a diameter of the through hole and a diameter smaller than the annular hole of the annular conductive terminal, and the annular conductive member is inserted up to the intermediate portion of the penetrated male screw body. The above problem is solved by a structure in which a terminal pressing plate for pressing a terminal is screwed and fixed.

[0008]

Therefore, according to the fixing device for the annular conductive terminal of the present invention, the terminal fixing screw of the annular conductive terminal is incorporated in the terminal block, so that the annular conductive terminal can be attached to the receiving terminal portion. Fixing and vice versa can be performed very easily, and the terminal fixing screw will not drop or be lost during the work of attaching or removing them.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A fixing device for an annular conductive terminal according to the present invention will be described below with reference to FIGS. 1 is a partially enlarged perspective view showing one receiving terminal portion of a fixing device for an annular conductive terminal according to a first embodiment of the present invention, and FIG. 2 is shown in FIG.
FIG. 4 is a side view showing a state in which the annular conductive terminal is attached to its receiving terminal portion by using the annular conductive terminal fixing device shown in FIG. 3, and FIG. 3 is a receiving terminal of the annular conductive terminal fixing device shown in FIG. 1. FIG. 4 is a side view showing the removal of the annular conductive terminal from the portion, and FIG. 4 is a partially enlarged perspective view showing one receiving terminal portion of the fixing device for the annular conductive terminal according to the second embodiment of the present invention. FIG. 5 is a side view showing the height positional relationship of the terminal pressing plate on the male screw body of the terminal fixing screw, and FIG. 6 shows a state where the terminal fixing screw is fastened to the receiving terminal portion of the terminal block of the present invention. 7 is a side view showing the positional relationship, and FIG. 7 is a side view showing the positional relationship showing a state in which the terminal fixing screw is loosened at the receiving terminal portion of the terminal block of the present invention. It should be noted that the same components as those of the terminal block 1 which is the fixing device for the annular conductive terminal of the prior art are denoted by the same reference numerals, and the description of those components will be omitted.

First, an embodiment of a fixing device for an annular conductive terminal according to the present invention will be described with reference to FIGS. In the terminal block 1A, which is the fixing device for the annular conductive terminals, a slip-out prevention plate 20 described later is fixed at the same height position on both side surfaces of the upper ends of both side walls 7 standing upright from both sides of the bottom portion 6 of the substrate 4. The insertion groove 8 is formed. A detachment prevention plate 20 is prepared as one of the parts on the terminal block 1A, and the terminal fixing screw 10 is provided at the center thereof.
A round through hole 21 having a diameter larger than the diameter of the male screw body 11 is formed, and a protruding piece 22 having a thickness dimension just fit in the insertion groove 8 is formed over the entire length of both end surfaces of the slip-out prevention plate 20. Has been formed.

Next, the assembly of one receiving terminal portion 3A of this terminal block 1A will be described. The slip-out prevention plate 2
The terminal fixing screw 10 is inserted from above the through hole 21 of No. 0, and the terminal pressing plate 13 is screwed from below the male screw body 11 that protrudes below the removal prevention plate 20, and is stopped at a predetermined height position. , The pull-out prevention plate 20 in this state
Insertion groove 8 in which convex pieces 22 at both ends of the
Then, by fitting, sliding and fixing in the direction indicated by the arrow, the receiving terminal portion 3A of the present invention is completed. If it is desirable to completely fix the slip-out prevention plate 20, the protrusion 22 and the insertion groove 8 may be fixed with an adhesive.

Next, a procedure for fixing the annular conductive terminal T connected to the tip of the cable C to the receiving terminal portion 3A by using the terminal block 1A which is the fixing device for the annular conductive terminal of the present invention will be described. First, in a state where the terminal fixing screw 10 is lifted upward with fingers or the like, a sufficient space is provided and held between the lower end tip portion of the male screw body 11 and the conductive plate 5 fixed to the bottom portion 6, and in this state The annular conductive terminal T is placed on the conductive plate 5 from the side of the lower opening of the terminal 3A. In this case, the hole 5A of the conductive plate 5 and the hole H of the annular conductive terminal T are matched. And the terminal fixing screw 10 that had been lifted
Lower end of the male screw body 11 is passed through the hole H of the annular conductive terminal T and the hole 5A of the conductive plate 5, and is screwed into the female screw 6A formed on the bottom 6 several times with fingers or a screwdriver. Then, use a screwdriver to screw it into the female screw 6A. Then, the annular conductive terminal T can be pressed and fixed to the conductive plate 5 by the terminal pressing plate 13. Therefore, the terminal pressing plate 13 and the terminal fixing screw 1
The ring-shaped conductive terminal T can be electrically connected to the conductive plate 5 through 0 (FIG. 2).

Next, the case where the annular conductive terminal T is received and removed from the terminal portion 3A in such a fixed and connected state will be described with reference to FIG. First, the terminal fixing screw 10 is screwed and loosened by using a screwdriver, and the lower end portion of the male screw body 11 is pulled out from the female screw 6A. Then, as shown in FIG. 3, the terminal fixing screw 10 can be manually lifted above the arrow until the terminal pressing plate 13 comes into contact with the removal prevention plate 20. In this way, if the lower tip of the male screw body 11 is sufficiently floated from the conductive plate 5,
The lower tip portion and the conductive plate 5 open, and the fixed annular conductive terminal T can be removed from the side below the opening in between. In this case, the terminal fixing screw 1
0 is held by the slip-out prevention plate 20 and the terminal pressing plate 13, and is received from the receiving terminal portion 3A and the terminal block 1A of the present invention.
Never fall out of.

Next, a second embodiment of the present invention will be described with reference to FIGS. In the terminal block 1A of the above-described embodiment, the case where one annular conductive terminal T is connected to and fixed to the terminal portion 3A is illustrated, but in the terminal block 1B of the example shown in FIG. 4, five annular conductive terminals are provided. The case where T is connected and fixed in the state where it is overlapped with the same receiving terminal portion 3A by the same terminal fixing screw 10 is shown.

When connecting and fixing the five annular conductive terminals T to the receiving terminal portion 3A, the terminal fixing screw 10 is used as described above.
Of the male screw body 11 is pulled out from the female screw 6A, and the terminal fixing screw 10 is pulled upward to open a space between the lower end portion of the male screw body 11 and the conductive plate 5, and one or a few of them.
The ring-shaped conductive terminals T are individually inserted into the male screw main body 11 from the lower tip of the male screw main body 11 being pulled up, and after this insertion is completed, the terminal fixing screw 10 is lowered, and the lower front end of the male screw main body 11 is attached to the bottom 6. By screwing into the female screw 6A and pressing the five annular conductive terminals T stacked by the terminal pressing plate 13, all the annular conductive terminals T can be received and electrically connected to the terminal portion 3A.

Further, when removing these five annular conductive terminals T from the receiving terminal portion 3A, the terminal fixing screw 10 is loosened and the male screw main body 11 is loosened, as in the case of the terminal block 1A of the first embodiment. The lower tip end is pulled out from the female screw 6A, and the terminal fixing screw 10 is pulled up upward to open one by one from the lower tip end portion of the terminal fixing screw 10 and the conductive plate 5. If it is pulled out, all the annular conductive terminals T can be removed.

When stacking and connecting and fixing a plurality of annular conductive terminals T as in this embodiment, as shown in FIG. 7, the height positional relationship for mounting the terminal pressing plate 13 on the male screw body 11 is as follows. Is a problem. In FIG. 5, the length from the lower surface of the terminal pressing plate 13 attached to the middle portion of the male screw body 11 of the terminal fixing screw 10 to the lower tip of the male screw body 11 is La, and from the upper surface of the terminal holding plate 13 to the screw head 12 Lb is the length to the bottom surface of the
Is Lc, and as shown in FIGS. 4, 6 and 7, the minimum effective tightening margin of the terminal fixing screw 10 is Ld, 5
The thickness of the ring-shaped conductive terminals T for each piece is De, the thickness Lf of the ring-shaped conductive terminals T for two pieces, the thickness Lg of the slip-out prevention plate 20,
The thickness of the conductive plate 5 is Lh. Then, the length L
The dimensions of a and Lb are obtained by the following relational expressions of [Equation 1] and [Equation 2].

[0018]

[Equation 1]

[0019]

[Equation 2]

When the terminal pressing plate 13 is attached to the male screw body 11 with dimensions satisfying the above relational expressions, when five annular conductive terminals T are stacked and connected and fixed to the terminal block 1B, FIG. As shown in FIG. 6, the screw head 12 of the terminal fixing screw 10 does not float above the upper surface of the slip-out prevention plate 20, and as shown in FIG.
It is possible to tighten with the lower surface of the 0 screw head 12 in contact with the upper surface of the slip-off prevention plate 20.

Further, the male screw body 11 of the terminal fixing screw 10
Thickness of the annular conductive terminal T of which the lower tip end is two from the bottom
When it is moved upward by f, the upper surface of the terminal pressing plate 13 comes into contact with the lower surface of the slip-out prevention plate 20 and stops as shown in FIG. 7, so that the terminal fixing screw 10 can be prevented from slipping out. Then, the lowest annular conductive terminal T can be removed from the gap opened at the lower tip of the male screw body 11.
If the individual annular conductive terminals T are removed, the annular conductive terminals T present thereon drop, and the dropped annular conductive terminals T can be sequentially removed.

As described above, the height position of the terminal pressing plate 13 in the male screw body 11 can be determined according to the number of the annular conductive terminals T to be stacked, connected and fixed. Therefore, if the height position can be determined, the height position may be fixed to the male screw body 11 by means such as welding, caulking, or adhesion. As described above, the terminal pressing plate 13 is previously screwed to the male screw body 11. It may be turned to stop at a predetermined height position and remain in a semi-fixed state. In the latter case, there is an advantage that fine adjustment can be performed when the number of the annular conductive terminals T is increased or decreased later.

In general, in the case of stacking and connecting and fixing N annular conductive terminals T, the numeral "5" in the formula [1] may be replaced with "N". However, N is a positive integer of 2 or more. Further, in the above-described embodiment, the power supply terminal has been described as an example, but the present invention is not limited to this power supply terminal. Further, although the description has been given taking only one receiving terminal portion 3A, the present invention can be applied not only to one receiving terminal portion 3A but also to a terminal block provided with a plurality of receiving terminal portions 3A. .

[0024]

As described above, according to the fixing device for the annular conductive terminal of the present invention, since the terminal fixing screw is incorporated in the terminal block, the annular conductive terminal can be easily received in the terminal portion. It can be attached, and conversely, the annular conductive terminal can be easily removed from the terminal portion. Above all, the terminal fixing screws, which are likely to occur during these operations, and the resulting loss of the terminal fixing screws are eliminated, and the work can be performed efficiently.

[Brief description of drawings]

FIG. 1 is a partially enlarged perspective view showing one receiving terminal portion of a fixing device for an annular conductive terminal according to the present invention.

FIG. 2 is a side view showing a state in which the annular conductive terminal is attached to the receiving terminal portion using the fixing device for the annular conductive terminal shown in FIG.

FIG. 3 is a side view showing that the annular conductive terminal is removed from the receiving terminal portion of the fixing device for the annular conductive terminal shown in FIG.

FIG. 4 is a partially enlarged perspective view showing one receiving terminal portion of the fixing device for the annular conductive terminal according to the second embodiment of the present invention.

FIG. 5 is a side view showing a height positional relationship of a terminal pressing plate on a male screw body of a terminal fixing screw.

FIG. 6 is a side view showing a positional relationship in which a terminal fixing screw is fastened to the receiving terminal portion of the terminal block of the present invention.

FIG. 7 is a side view showing a positional relationship showing a state in which the terminal fixing screw is loosened in the receiving terminal portion of the terminal block of the present invention.

8A and 8B are overall views of a terminal block having a large number of receiving terminals to which four cables are fixed, FIG. 8A being a perspective view thereof, and FIG. It is the perspective view which showed the annular conductive terminal.

9 is an enlarged perspective view of one receiving terminal portion for explaining a fixing method of fixing the annular conductive terminal to one receiving terminal of the terminal block shown in FIG.

10 is a partially enlarged sectional side view showing a state in which an annular conductive terminal is fixed to one receiving terminal of the terminal block shown in FIG.

[Explanation of symbols]

 1A Terminal block according to the first embodiment of the present invention 1B Terminal block according to the second embodiment of the present invention 2 Central partition wall 3A Receiving terminal part 4 Substrate 5 Conductive plate 5A Hole 6 Bottom part 6A Female screw 7 Side wall 8 Insertion groove 10 Terminal fixing screw 11 Male screw body 12 Screw head 20 Fall-out prevention plate 21 Through hole 22 Convex piece C Cable H hole T Annular conductive terminal

Claims (1)

[Claims] 1. A fixing device for a ring-shaped conductive terminal, which fixes a ring-shaped conductive terminal connected to a tip of a cable to a terminal block, wherein a bottom part to which a conductive plate having a female screw formed in a central part is mounted and both end parts of the bottom part are attached. A terminal block having a receiving terminal portion composed of an upright side wall, a rectangular removal prevention plate fixed to the upper ends of both side walls and having a through hole in the center, and a removal prevention plate of the removal prevention plate. A terminal fixing screw, which is inserted from above the through hole, has a screw head having a diameter larger than the diameter of the through hole, and a male screw body having a diameter smaller than the diameter of the through hole and a hole smaller than the hole of the annular conductive terminal. It is fixed by screwing up to the middle part of the male screw body,
A fixing device for an annular conductive terminal, comprising: a terminal pressing plate that presses the annular conductive terminal.