JP3110393B2 - Terminal block - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a terminal block to which a power supply line or a signal line is connected.

[0002]

2. Description of the Related Art Conventionally, as a terminal block of this type, for example, one having a structure shown in FIGS . 7 and 8 is known.
In FIG. 7 , the terminal block 3 has a large number of screw holes 3b formed on one surface side of a base 3a.
In addition, an annular crimp terminal (terminal) crimped to the tip of the wiring L
9 are fixed by fixing screws 1 so that a large number of the wirings L are individually fixed.

[0003] In such a conventional terminal block 3, a fixing screw 1 in which a washer (spring washer) 2 is inserted is screwed and fixed to the screw hole 3 b at a place where it is not connected. When the wiring L is fixed, the fixing screw 1 is removed from the base 3a together with the washer 2 and then the fixing screw 1 is inserted into the washer 2 and fixed to the end of the wiring L. The fixed screw 1 is then inserted into the base 9a.
By screwing into the screw holes 3b. Also,
After the connection of the wiring L to the necessary portion is completed, the cover 4 for electric insulation is mounted so as to cover the surface of the base 3a on the side where the fixing screw 1 is mounted. Has become.

[0004]

However, such a conventional technique has the following problems. That is, in order to remove the wiring L, first, the cover 4 is removed to expose the head of the fixing screw 1, and then the fixing screw 1 is loosened. And fix it with the fixing screw 1
After removing only the terminal 9 from the base 3, a procedure of screwing the fixing screw 1 and the washer 2 to the base 3 a is required. In a state where the fixing screw 1 is removed from the base 3 a, The holding force of the washer 2 and the terminal 9 is released. For this purpose, the fixing screw 1 is attached to the base 3a.
If the fixing screw 1 and the washer 2 are not held by any means in a state where the fixing screw 1 and the washer 2 are detached from each other, there is a problem that they are likely to fall and be lost.

When the fixing screw 1 is screwed to the base 3a, for example, when the wiring L is connected, the fixing screw 1 is aligned with the screw hole 3b and the terminal 9 is fixed. In this state, the screwing operation of the fixing screw 1 must be performed in a state in which is locked, so that there is a problem that the operation is complicated.

Further, since the cover 4 must be detached and attached each time the fixing screw 1 is attached and detached, the operation is further complicated by the synergistic action with the above-mentioned problem.

[0007] The present invention has been made in view of such problems, and an object thereof is to provide a terminal block that can simplify the work of connecting and disconnecting wiring. It is another object of the present invention to provide a terminal block which can prevent loss of components during connection and disconnection of wiring as much as possible.

[0008]

According to a first aspect of the present invention, there is provided a terminal block to which a wiring is connected and a terminal fixed to a tip end of the wiring. And a fixing screw that is attached through the terminal and is screwed into a screw hole formed in the base, thereby fixing the terminal to the base. An elastic cover is provided on the base at an interval shorter than the length of the fixing screw between the base and the base, and the fixing screw is provided on the base.
Child, between the head of the fixing screw and the terminal
A washer is provided between the washer and the base.
A release prevention mechanism is provided to prevent the washer from coming off.
Smaller than the outer diameter of the screw portion of the fixing screw.
Forming a through hole having an inner diameter, and the fixing screw;
When the head is brought into contact, the diameter of the through hole is increased.
Forming a slit to allow passage of the head, the terminal
When removing the fixing screw, rotate it in the direction to loosen the
The head of the fixing screw passes through the cover and
The cover protrudes to the outside, and its elasticity causes the cover to return to its original position.
And the inner surface of the through hole becomes the screw portion of the fixing screw.
The fixing screw is contacted and held by the elasticity of the cover.
It is characterized by being performed. The terminal according to claim 2 of the present invention.
The stand is provided with the detachment prevention mechanism according to claim 1 and the washer.
And a screw of a fixed screw with respect to the base.
A connecting leg slidably fitted in the mating direction and
The washer is provided integrally and the washer is separated from the base by a predetermined distance.
And the locking piece engaged with this base
It is characterized by comprising.

[0009] Any one of claims 1 and 2 of the present invention .
According to the terminal block described in the above, when the driver is inserted into the through hole formed in the cover to loosen the fixing screw, the head of the fixing screw elastically deforms the cover to expand the diameter of the through hole. This causes the head to protrude from the outer surface of the cover. Then, in a state where the head of the fixing screw is projected from the outer surface of the cover, the cover returns to its original position by its own elasticity, thereby elastically holding the screw portion of the fixing screw. Thus, even when the fixing screw is detached from the base, the fixing screw is held on the base via the cover, so that the fixing screw can be prevented from dropping and lost. Also,
In order to fix the fixing screw to the base again, the fixing screw is held at a predetermined position with respect to the base by the cover and held in a state of being positioned with respect to the screw hole formed in the base. Since these positioning operations are simple, there is no need to attach and remove the cover,
The re-engagement of the fixing screw can be performed smoothly. further,
By fixing the terminal through the washer attached to the fixing screw, the fixing force can be increased, and in a state where the fixing screw is separated from the base, the washer from the base of the washer is prevented by the detachment prevention mechanism. The detachment is prevented, so that the washer can be prevented from being lost. According to the terminal block of the second aspect, at the time of connecting the terminal, the washer is separated from the base by a predetermined distance, and the terminal can be inserted into the space between the washer and the terminal can be connected.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIG.
This will be described with reference to FIG. In the following description, portions common to the related art will be denoted by the same reference numerals and description thereof will be simplified.

The terminal block according to the present embodiment, which is designated by the reference numeral 3 in these figures, comprises a base 3a to which wiring is connected, a terminal 9 fixed to the tip of the wiring, and And a screw hole 3 formed in the base 3a.
b, the terminal 9 is connected to the base 3a.
And a cover 5 having elasticity provided between the base 3a and the base 3a at an interval shorter than the length of the fixed screw 1.
In addition, a through hole 5a having an inner diameter smaller than the outer diameter of the screw portion of the fixing screw 1 is formed, and when the head of the fixing screw 1 is brought into contact, the diameter of the through hole 5a is increased. This is a basic configuration in which a slit 8 (see FIG. 2) that allows the head to pass through is formed.

To explain these details, the cover 5 is made of an elastic and electrically insulating material such as natural rubber or synthetic resin rubber, and is attached to the base 3a. Spacer 11
, And is held at a predetermined distance from the end of the screw hole 3b.

In the present embodiment, an annular flat washer (washer) 10 is mounted on the upper surface of the base 3a coaxially with the screw hole 3b. The connecting legs 12 are provided integrally, and these connecting legs 12 slidably penetrate the base 3a along the screwing direction of the fixing screw 1, and a washer 10 is provided at a tip end thereof. When separated from the base 3a by a predetermined distance, a locking piece 13 that engages with the base 3a to prevent the connection leg 12 from being detached, that is, the washer 10 from being detached, is integrally provided. In the present embodiment, the connection leg 12 and the locking piece 13 constitute a detachment prevention mechanism.

In this embodiment constructed as described above, when removing the terminal 9, the driver is inserted into the through hole 5 a of the cover 5 and fitted to the head of the fixing screw 1 and then turned. By operating, the fixing screw 1 is rotated in a loosening direction, and is separated from the base 3a as shown by an arrow in FIG. When the operation of separating the fixing screw 1 from the base 3a is continued in this way, the fixing screw 1 is brought into contact with the inner surface of the cover 5 as shown by a chain line in FIG. , The cover 5 is pushed up by the head of the fixing screw 1. Here, the through hole 5a of the cover 5
Is provided with a large number of slits 8,
As shown in FIG. 5, the area around the through hole 5a of the cover 5 is elastically deformed so as to open, and the diameter of the through hole 5a is expanded. As shown in the figure, the cover 5 is made to protrude to the outside through the cover 5, and at the same time as the head of the fixing screw 1 projects, the cover 5 returns to its original position by its elasticity, and the through hole 5a The inner surface is brought into contact with the screw portion of the fixing screw 1. As a result, the fixing screw 1 is held by the elasticity of the cover 5.
a, and the washer 10 from which the pressing force has been released is also connected to the connecting leg 12 or the locking piece 1.
Since the detachment of the fixing screw 1 from the base 3a is prevented by the action of 3, the falling or loss of the fixing screw 1 is prevented. Then, with the fixing screw 5 separated from the base 3a,
Is pulled out to disconnect the wiring L.

On the other hand, when connecting the wiring L, as described above, the fixing screw 1 is kept separated from the base 3a, and the terminal 9 is inserted while the washer 10 is floating from the base 3a. Then, the fixing screw 1 is screwed into the screw hole 3b of the base 3a. At this time, the fixing screw 1 is held in a state of being positioned with respect to the screw hole 3b by the cover 5, and the cover 5 is elastically deformed when the fixing screw 1 is pressed toward the base 3a. The fixing screw 1 is easily matched with the screw hole 3b. Also,
Since the washer 10 is held at a predetermined position with respect to the screw hole 3b by the action of the connecting leg 12 and the locking piece 13, by adjusting only the position of the terminal 9, the fixed screw 1 10 and the terminal 9 can be easily fitted. Accordingly, the wiring L can be attached and detached by a simple operation, and the loss of the constituent members is reliably prevented.

[0016]

[0017]

As described above, according to the first aspect of the present invention,
According to the terminal block of the present invention, the fixing screw is held in the cover in a state where the fixing screw is separated from the base, thereby preventing the fixing screw from falling. Can be prevented from being lost. When the fixing screw is fixed to the base again, the fixing screw is held at a predetermined position with respect to the base by the cover, and the fixing screw is positioned in the screw hole formed in the base. Can be held,
These positioning operations can be simplified, and the attachment / detachment of the cover, that is, the attachment / detachment of the fixing screw, that is, the attachment / detachment of the wiring can be smoothly performed. Further, by fixing the terminal through a washer attached to the fixing screw, the fixing force can be increased, and when the fixing screw is separated from the base, the base of the washer is removed by the detachment prevention mechanism. The washer can be prevented from being lost, and loss of the washer can also be prevented. The terminal block according to claim 2.
According to this, at the time of terminal connection, the washer is separated from the base by a predetermined distance, and the terminal can be inserted into the space between the washer and the connection of the terminal is not hindered.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing an embodiment of the present invention.

FIG. 2 illustrates one embodiment of the present invention, and is a plan view of a cover.

FIG. 3 illustrates one embodiment of the present invention, and is a plan view of a terminal.

FIG. 4 is a longitudinal sectional view showing one embodiment of the present invention.

FIG. 5 is a longitudinal sectional view showing one embodiment of the present invention.

FIG. 6 is a longitudinal sectional view showing one embodiment of the present invention.

FIG. 7 is an external perspective view showing a conventional example.

FIG. 8 is a longitudinal sectional view of one conventional example.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 screw (fixed screw) 2 spring washer (washer) 3 terminal block 3 a base 3 b screw hole 4 cover 5 (elastic) cover 5 a through hole 8 slit 9 crimp terminal (terminal) 10 washer 11 spacer 12 connecting leg (separation prevention mechanism) 13) Locking piece (separation prevention mechanism)

Claims (2)

(57) [Claims] 1. A base to which a wiring is connected, a terminal fixed to a tip end of the wiring, and a terminal that is mounted through the terminal and screwed into a screw hole formed in the base. And a fixing screw for fixing the terminal to the base, wherein the elastic cover is provided on the base with an interval shorter than the length of the fixing screw between the base and the fixing screw. Provided, the head of the fixing screw and the fixing screw,
Provide a washer interposed between the terminal and this washer.
Between the base and the base to prevent the washer from coming off
A locking mechanism is provided, and a screw of the fixing screw is provided on the elastic cover.
When forming a through hole with an inner diameter smaller than the outer diameter of the part
In both cases, when the head of the fixing screw is abutted,
The through hole has a diameter that allows the head to pass through.
The fixing screw when removing the terminal.
And the head of the fixing screw covers the cover.
Penetrates and projects outside the cover, and the cover
It returns to its original position by elasticity, and the inner surface of the through hole is
The fixing screw contacts the screw portion of the fixing screw and the fixing screw is
A terminal block which is held by elasticity of the terminal block. 2. The system according to claim 1 , wherein said detachment preventing mechanism is connected to said washer.
Provided on the body, in the screwing direction of the fixing screw with respect to the base.
A connection leg slidably fitted and an integral part of this connection leg
When the washer is separated from the base by a predetermined distance.
And a locking piece engaged with the base.
The terminal block according to claim 1, wherein