JPS6353672B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a terminal connecting device in which a screw does not fall off, and particularly to a terminal connecting device in which a screw attached to a movable member is stably held in two positions: an upper limit position and a lowered position.

This type of conventional terminal connecting device supports screws for fixing terminals and constantly presses a movable member slidably across the terminal board outwardly by a helical spring. Because of the structure, the helical spring is constantly pressing against the movable member, and when screwing the screw into the female thread of the terminal board, the lead wire must be fixed while pressing against the screw against the restoring force of the spring. Therefore, when a large number of terminal connection devices are installed together, the disadvantage is that the work is extremely troublesome as it involves the work of fixing the lead wires individually against the restoring force of the spring. It was hot.

The present invention was invented with the aim of solving the above-mentioned drawbacks.

Embodiments of the present invention will be described below based on the drawings.

FIG. 1 shows a front view of an embodiment of the present invention.

The terminal block main body 1 is integrally molded from plastic, and includes a partition 2 for ensuring electrical insulation from other adjacent terminal connection devices, a central partition wall 3 that divides the partition into left and right halves, and a partition between the left and right sides of the partition. A left end wall 4 and a right end wall 5 provided at both ends, a rail mounting portion 6 provided below the partition portion 2, and a convex portion 7 for fitting with another adjacent terminal connecting device and a recess on its back surface. (not shown) is integrally formed.
The terminal plate 8 is a rectangular flat plate made of a conductor supported by the central partition wall 3 and the left and right end walls 4 and 5, with female threads 9A and 9B carved on both left and right sides, and movable members 10A and 10B in contact with the center partition wall. A notch is formed for passing 10B. The movable members 10A and 10B are bilaterally symmetrical. To explain this for 10A, the end located inside the terminal board 8 is provided with a V-shaped valley-shaped movable spring receiving part 11 perpendicular to the displacement direction, and the end located outside the terminal board 8 is provided with a V-shaped valley-shaped movable spring receiving part 11 perpendicular to the displacement direction. is provided with a pressing portion 12 parallel to the terminal plate 8, and a neck portion of a screw 13 and a spring washer 14 are rotatably supported in a central hole of the pressing portion 12. At predetermined positions on the left end wall 4 and right end wall 5 of the terminal block main body 1, there are formed V holes perpendicular to the displacement direction of the movable member.
Valley-shaped fixed spring receivers 15A and 15B are provided facing the movable spring receiver, and compression springs 16A and 16B are fitted between both spring receivers.

The shape of the compression spring 16A or 16B is a leaf spring with a slit in the center vertical direction of a leaf spring with a slit in the center vertical direction of a leaf spring with a slit made in the center vertical direction of a leaf spring with c.
Implemented with various shapes and structures such as those with left and right sides curved in different shapes, d loop-shaped wire springs, e wire springs with both ends free, f double-wound wire springs, and (g) rectangular wire springs. can do.

The left side of FIG. 1 shows a state in which the lead wires are not connected. Due to the restoring force of the spring 16A, the movable spring receiving part 11A of the movable member 10A is at the upper limit position where it contacts the terminal plate 8, and the screw 13 is in the upper limit position of the movable member 10A.
It does not fall off from the pressing part 12, and the tip of the screw faces the female thread. The right side of FIG. 1 shows the state in which the lead wire 17 is connected. Terminal board 8 and pressing part 12
has clamped the lead terminal, and the movable member 10B has descended to near its lower limit.

In the present invention, even if the shape and dimensions of the movable member 10 are the same, the state in which the movable member 10 is not screwed changes in two ways depending on the length of the screw 13 or the height of the fixed spring receiver 15. That is, as shown in FIG. 2, the screw 1 at the upper limit position of the movable member 10
3 and the top surface of the terminal plate 8 is l ₁ , and the vertical length of the movable spring receiver 11 and fixed spring receiver 15 is l ₂ , then l ₁ > l ₂ is satisfied. In this case, the upper limit position shown in Figure 2a and Figure 2b
The movable member 10 is in two positions, including the lowered position shown in the figure.
is maintained stably. A compression spring 1 is inserted between these two positions.
There is a neutral point where the length of 6 is minimum, and when the movable member is above that neutral point, an upward force is applied to the movable member by the spring, and when the movable member is below the neutral point A downward force is applied to the movable member by the spring.

Therefore, when the user pulls up to the state shown in Fig. 2a, inserts the lead wire, and presses down the movable member 10, it immediately becomes the state shown in Fig. b, and in the state shown in Fig. The force of the spring 16 acts in the direction in which the screw is clamped, and the work can be done without resisting the force of the spring 16 while tightening the screw.Moreover, while the screw is being tightened, the force of the spring continues to act in the direction of tightening the screw. Therefore, there is no risk of the screws loosening due to vibration, etc.

In this invention, as described above, the screw attached to the movable member is stably held in two positions, the upper limit position and the lowered position. In the work process, all the movable members of the terminal connecting device are pulled up to the state shown in Figure 2a, then the lead wires are sequentially inserted and at the same time held in the state shown in Figure 2b, and finally the screws are tightened. Since the lead wires can be connected, it is particularly easy to connect the lead wires of a large number of terminal connecting devices.

Also, if the connection part of the lead wire above is a round crimp terminal, pull up all the screws and
By holding the screw in the lowered position at the same time as inserting the crimp terminal, the lead wire can be temporarily secured.
After all the temporary fixings have been completed and the connections have been confirmed, the screws can be tightened all at once, making lead wire connection work easier and more reliable.
Its practical effects are significant.

[Brief explanation of the drawing]

FIG. 1 is a front view showing an embodiment of the present invention, and FIG. 2 is an explanatory diagram of the operation of the present invention. DESCRIPTION OF SYMBOLS 1...Terminal block body, 3...Central bulkhead, 6...Rail attachment part, 8...Terminal board, 9A, 9B...Female thread, 10A, 10B...Movable member, 11...Movable spring receiver, 13 ……Screw.

Claims (1)

[Claims] 1. In a terminal connection device in which a lead wire is screwed between a terminal plate and a movable member with a screw, the movable member is movably supported up and down by a compression spring, and there is a mechanism to prevent the lead wire from coming off between the terminal plate and the terminal plate. A movable spring receiver is provided at the lower end of the movable member, and a fixed spring receiver is provided inside the left end wall and right end wall of the terminal connecting device main body, and the lower tip of the screw at the upper limit position of the screw and the terminal plate are provided. A terminal connecting device characterized in that a distance between the movable spring receiving part and the fixed spring receiving part at the upper limit position is larger than the vertical length of the movable spring receiving part and the fixed spring receiving part at the upper limit position.