JPH05242918A - Terminal block - Google Patents

Abstract

PURPOSE:To provide a terminal block having a compact size, allowing the easy connecting of a flat cable and a round cable, and ensuring a proper electrical connection. CONSTITUTION:A flush type screw 17 having a screw hole 18 at the center for connection to a conductor 1a inside a flat cable 1, is screwed into and fixed to a terminal block 13. In this case, the terminal of a round cable and the terminal of the flat cable 1 are coaxially positioned and, therefore, the terminal block can be made compact. Also, the round cable and the flat cable 1 are connected to each other at a separate process, and a connection work can be easily undertaken. In addition, the screw 17 is pressed against the conductor la with a screw tightening force, and the electrical connection thereof can be ensured.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a terminal block suitable for connecting a flat cable and a general round cable.

[0002]

2. Description of the Related Art Conventionally, a flat cable such as an undercarpet cable having conductors arranged in parallel inside an insulator and a single round cable are connected as shown in FIG. 22 or FIG. That is, in FIG. 22, the terminal 2 that contacts the inner conductor 1 a is fixed to the end portion of the flat cable 1, and the terminal 2 is placed on the terminal block 3. Then, the flat cable 1 and the round cable 4 are connected to each other by fixing the round cable 4 together with the terminal 5 to the terminal block 3 with a screw 6. 23. In FIG. 23, the circular cable 4 is attached to the portion of the connection piece 7 extending in the horizontal direction of the terminal block 3 without fastening the terminals 2 and 5 together as in FIG.
The terminal 5 of the above is screwed separately from the terminal 2 of the flat cable 1.

[0003]

By the way, in the connection method of the flat cable and the round cable as described above, there have conventionally been the following problems to be solved. (1) In the connection method of FIG. 22, since the flat cable 1 is connected to the terminal block 3 and then the screw is loosened again to connect the terminal 5 of the round cable 4, the position of the flat cable 1 is changed when the screw 6 is loosened. There is a case in which the screws 6 are displaced and it takes a great deal of labor to insert or tighten the screws 6, and the connecting work is complicated. (2) In the method shown in FIG. 23, two screws 6 are required for electrical connection of one phase, and the size of the terminal block 3 is increased in order to extend the connection piece 7 in the horizontal direction of the terminal block 3. Will grow. When the terminal block 3 becomes large, there is a problem that the wiring work becomes difficult because the space for the mounting location of the distribution board or the like is limited. The present invention has been made to solve the above problems, and an object thereof is to provide a terminal block that is small in size, can be easily connected to a flat cable and a round cable, and has a reliable electrical connection. To do.

[0004]

The terminal block of the present invention is screwed so as to be crimped to a cable insertion opening for inserting a flat cable and a conductor inside an end portion of the flat cable inserted from the cable insertion opening. With embedded screws,
A screw hole for fixing the terminal of the single wire cable is formed in the center of the embedded screw.

[0005]

The terminal block of the present invention has an embedded screw having a screw hole at the center thereof, which is connected to the conductor inside the flat cable.
Since the screw is fixed to the terminal block, the position of the terminal of the round cable matches the position of the terminal of the flat cable, and the terminal block can be downsized. In addition, since the connection between the round cable and the flat cable is a separate process, the connection is easy, and since the embedded screw is pressed against the conductor by the tightening force of the screw, the electrical connection between them is made. Be certain.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The terminal block of the present invention will be described in detail below with reference to the drawings. FIG. 1 is a perspective view showing an outline of a terminal block of the present invention. In the figure, 13 indicates the entire terminal block, and a cable insertion port 14 for inserting the flat cable 1 penetrating in the horizontal direction is provided on the side surface of the terminal block 13. Screw hole 1 that intersects this cable insertion port 14 at a right angle
5 is formed on the upper surface of the terminal block 13. This screw hole 1
An embedding screw 17 having a notch 16 for inserting a driver is screwed into the upper end of the screw 5. A screw hole 18 for fixing a terminal of a single wire cable such as a round cable is formed at the center of the embedded screw 17.
A screw 19 is screwed into the screw hole 18 to fix a round cable or the like.

The flat cable 1 is a conductor 1 inside the insulator 1b, such as an under carpet cable.
a are separated from each other and arranged in parallel, and each flat cable is used as a power phase, an earth phase, a neutral phase, or the like. Next, the process of connecting the flat cable 1 and the round cable using the terminal block 13 having the above-described configuration will be described with reference to FIG. First, as shown in FIG. 2, the terminal 2 is driven into the end portion of the flat cable 1,
After electrically connecting the terminal 2 to the conductor 1a inside, one end of the flat cable 1 is inserted into the inside from the cable insertion port 14 of the terminal block 13.

Then, as shown in FIG. 3, a tool such as a screwdriver is inserted into the driver insertion notch 16,
The embedded screw 17 is rotated to screw the embedded screw 17 into the screw hole 15 of the terminal block 13. When screwing in, the upper surface of the terminal block 13 and the upper surface of the embedding screw 17 are made to substantially coincide with each other, and the lower end surface of the embedding screw 17 is pressed against the terminal of the flat cable 1 at this position. The dimensions are set so that the conductor 1a inside the flat cable 1 and the embedded screw 17 are electrically connected.

Next, as shown in FIG. 4, the through hole 5 of the terminal 5 fixed to the end of the round cable 4 is provided on the upper surface of the embedded screw 17.
Align a with the screw hole 18 of the embedded screw 17 and screw 1
Tighten and fix with 9. In this way, the flat cable 1 and the round cable 4 are electrically connected via the embedded screw 17. Next, FIGS. 5 and 6 show another embodiment of the present invention. In this embodiment, the flat cable 1
The terminal to be fixed to the end portion of is not a driven type, but a foldable type terminal 20 in which a flat cable of each phase is sandwiched from the side surface is used. Even when such a foldable terminal 20 is used, there is no need to provide a through hole for inserting a screw in the central portion of the terminal 20 as in the conventional case, and as shown in FIG. The foldable terminal 20 can be reliably pressed by 17 and the electrical connection can be maintained.

Next, another embodiment of the present invention will be described. First, FIG. 24 and subsequent figures show an IDC connection method which is a one-touch connection method for breaking through a conventional insulator to a conductor of a flat cable. In FIG. 24, 21 is an IDC terminal, and a plurality of protrusions 22 are formed on the lower surface of this terminal 21. As shown in FIG. 25, the IDC terminal 21 is tightened by a screw 23 so that the IDC terminal 21 is bitten into the insulator 1b of the flat cable 1 so that the protrusion 22 presses the conductor 1a. The electrical connection is made. In the above case, as shown in the enlarged view of FIG. 26, the insulator 1b of the flat cable 1 is ID
The protrusion 22 of the C terminal 21 is excluded by the protrusion 22.
Is pressed by the conductor 1a. However, not necessarily 10
It is not always possible to secure the contact between the protrusion 22 and the conductor 1a with a probability of 0%.

That is, a part of the insulator 1b cannot be removed by the protrusion 22 and may remain between the protrusion 22 and the conductor 1a. In such a case, there is a drawback that electrical contact becomes poor. Further, since the projection 22 of the IDC terminal 21 is pressed against the conductor 1a of the flat cable 1 to maintain the connection relationship, the contact surface is easily separated when an external force such as vibration is applied to the contact portion. Alternatively, there is a problem that the contact pressure of the contact surface is affected and the contact resistance value is increased. Therefore, in the present invention, as shown in FIG. 7, the insulator 1b of the flat cable 1 is attached to the lower end surface 17a of the embedded screw 17.
A blade die 25 for cutting out is formed radially. As shown in FIG. 8, the blade die 25 has an inclination in which the height gradually increases in the rotation direction R of the embedding screw 17, so that the sharp protrusion 25a bites into the insulator 1b. 25b
With this, the insulator 1b is cut into a cylindrical shape.

That is, first, as shown in FIG. 9, the embedding screw 17 is screwed into the screw hole 15 of the terminal block 13, and as shown in FIG. 10, the blade die 2 is attached to the insulator 1b of the flat cable 1.
Make 5 bite. At that time, the insulator 1b is cut by the blade die 25 in accordance with the rotation of the embedded screw 17, and the chips are sequentially removed to the outside. Then, finally, the blade die 25 is firmly pressed against the conductor 1a of the flat cable 1. An enlarged cross section of this state is shown in FIG. In the embodiment described above, the insulator 1b can be cut by the blade die 25 as the embedded screw 17 rotates, so the blade die 25 and the conductor 1 can be cut.
the insulator 1b does not remain between the conductor 1a and
The electrical contact between the embedded screw 17 and the embedded screw 17 becomes reliable. Further, since the tip end of the blade die 25 is firmly pressed against the conductor 1a by the tightening force of the screw, the contact surface is not easily separated even when an external force such as vibration is applied to the contact portion. Further, it is possible to always obtain a substantially constant contact resistance value without affecting the contact pressure.

In the above embodiment, the blade die 25 is provided on the lower end surface 17a of the embedding screw 17, but FIG.
And a disk 27 having claws 26 formed in the circumferential direction as shown in an enlarged view of FIG. 13 is sandwiched between the embedding screw 17 and the flat cable 1 so as to rotate together with the embedding screw 17. May be. Further, as shown in FIG. 14 and FIG. 15 shown as an enlarged view thereof, a disc 29 having a claw 28 formed in the circumferential direction is sandwiched between the embedding screw 17 and the flat cable 1 in the same manner as described above, and the embedding is performed. Even if the screw 17 is rotated together with the screw 17, the same effect as in the previous embodiment can be obtained.

Next, another embodiment of the present invention will be described with reference to FIG.
It is shown below. In this embodiment, an improvement is added so that the connection relationship between the embedded screw 17 and the conductor 1a of the flat cable 1 is always constant. That is, conventionally, whether or not the embedded screw 17 and the conductor 1a are connected depends on the intuition of the operator, and the upper surface of the embedded screw 17 is almost aligned with the upper surface of the terminal block 13. When I screwed it in, I was working on the assumption that those connections were made. However, the work relying on such intuition is not accurate, and the resistance value of the connection part may increase due to insufficient screwing of the embedding screw 17, causing local heat generation, which may lead to a serious accident. Further, even in the completely fastened state, loosening may occur due to external vibration, etc., which may lead to an accident similar to the above.

Therefore, in this embodiment, in order to always keep the tightening end position of the embedding screw 17 constant, as shown in FIG. 16, a ratchet receiving notch is formed in a part of the outer periphery of the upper end of the embedding screw 17. 30 is provided, and at a position where the ratchet 31 is tightened by a certain distance X, the ratchet 31 that falls into the notch 30 is attached to the terminal block 13
It is provided on a part of the inner circumference of the upper end of the screw hole 15. As shown in FIG. 17, the distance X from the bottom surface of the ratchet receiving notch 30 to the bottom surface of the embedding screw 17 is X.
The dimensions are set so that the conductor 1a of the flat cable 1 and the embedded screw 17 are completely connected, and the distance Y from the bottom surface of the ratchet 31 to the bottom surface of the embedded screw 17 coincides with each other. There is.

Next, the embedded screw 17 in the above embodiment.
The tightening process will be described with reference to FIGS. 18 to 21.
First, as shown in FIG.
The screw hole 15 is inserted from the end and screwed. In this case, since the outer circumference of the embedded screw 17 is cylindrical,
As shown in FIG. 5, the ratchet 31 is pushed outward by the outer circumference of the embedded screw 17. Next, when the embedding screw 17 is screwed in to a predetermined position, as shown in FIGS. 20 and 21, the ratchet 31 falls into the ratchet receiving notch 30 of the embedding screw 17 due to the restoring force of the ratchet 31 itself. ..

That is, by tightening the embedding screw 17 to this position, a reliable connection between the conductor 1a of the flat cable 1 and the embedding screw 17 can be secured.
Further, when the ratchet 31 falls into the notch 30 for receiving the ratchet, the embedding screw 17 is prevented from loosening, and even if external force such as vibration is applied to the embedding screw 17, the resistance value of the contact portion is changed. Things will disappear. Further, even if the screw 19 shown in FIG. 1 is loosened by connecting a round cable or the like, the embedded screw 17 is prevented from rotating and the tightened state is maintained. By pushing back the ratchet 31 against the elastic force of the tip end of the driver or the like, the embedding screw 17 can be easily loosened, and the embedding screw 17 can be reattached without damaging the terminal block 13. It can be used.

[0018]

As described above, according to the present invention, since the embedded screw connected to the conductor inside the flat cable is screwed and fixed to the terminal block, the following effects can be obtained. (1) The flat cable and the general round cable can be easily connected by using the screw hole at the center of the embedded screw. (2) Since the connecting process of the flat cable and the general round cable is performed by completely separate processes, complicated work such as positioning of terminals unlike the conventional case is unnecessary. (3) By providing a screw hole for connecting the above-mentioned round cable in the central portion of the embedded screw, the connecting portion is arranged coaxially, so that the terminal block can be manufactured in a small size, and the distribution board, etc. It is also space-friendly when it is installed in a narrow space. (4) Since the connection is made by pressing the flat cable with the embedded screw, the terminal fixed to the end of the flat cable does not necessarily need to be provided with a screw hole, and a foldable type terminal can also be used. Various connections are possible. (5) By forming a blade mold on the lower end surface of the embedded screw,
The insulator of the flat cable can be cut at the same time as the screwing, and a reliable electrical connection can be obtained without leaving the insulator between the embedded screw and the conductor. (6) A ratchet receiving notch is provided on a part of the outer circumference of the embedded screw, and a ratchet that falls into the above notch when a certain distance is screwed in is provided on a part of the inner circumference of the upper end of the screw hole of the terminal block. Allows you to use
It is possible to always maintain a reliable electrical connection relationship between the embedded screw and the conductor.

[Brief description of drawings]

FIG. 1 is a perspective view showing an outline of a terminal block of the present invention.

FIG. 2 is a perspective view in which a part of the terminal block is cut away.

FIG. 3 is a partially cutaway perspective view showing a connection state between a terminal at an end portion of a flat cable inserted in the terminal block and an embedded screw.

FIG. 4 is a partially cutaway perspective view showing a state in which a flat cable and a round cable are connected using the terminal block.

FIG. 5 is a perspective view showing an end portion of a flat cable showing another embodiment of the present invention.

FIG. 6 is a partially cutaway perspective view showing a connection state between the embedded screw and the terminal of the flat cable in the above embodiment.

FIG. 7 is a perspective view of an embedded screw according to still another embodiment of the present invention.

FIG. 8 is an enlarged view of the blade die in the above embodiment.

FIG. 9 is a cross-sectional view showing an initial state in the case of connecting to a conductor of a flat cable by using the embedded screw having the blade shape.

FIG. 10 is a cross-sectional view showing a state where the embedded screw having the blade die is screwed into a flat cable.

11 is a partially enlarged sectional view of FIG.

FIG. 12 is a perspective view of a disc sandwiched between the embedded screw and a flat cable.

FIG. 13 is an enlarged perspective view of a claw formed on the disc.

FIG. 14 is a perspective view of another disk in which the shape of the claw is changed.

FIG. 15 is an enlarged perspective view of a claw of another disc.

FIG. 16 is a perspective view showing still another embodiment of the present invention.

FIG. 17 is a cross-sectional view for explaining the dimension setting of the ratchet receiving notch and the ratchet in the other embodiment.

FIG. 18 is a perspective view showing an initial state for explaining an engagement state between the ratchet receiving notch and the ratchet.

FIG. 19 is a plan view showing a state similar to that of FIG.

FIG. 20 is a perspective view showing a state in which a ratchet has fallen into the ratchet receiving notch.

21 is a plan view showing a state similar to that of FIG. 20. FIG.

FIG. 22 is a perspective view showing a state in which a flat cable and a round cable are connected using a conventional terminal block.

FIG. 23 is a perspective view showing a state in which a flat cable and a round cable are connected using another conventional terminal block.

FIG. 24 is a sectional view showing an initial state in a conventional IDC connection method.

FIG. 25 is a cross-sectional view showing a state after completion of tightening in the conventional IDC connecting method.

FIG. 26 is an enlarged cross-sectional view showing a state after completion of the tightening.

[Explanation of symbols]

 1 Flat Cable 1a Conductor 1b Insulator 13 Terminal Block 14 Cable Insertion Port 15 Screw Hole 16 Driver Insert Notch 17 Embedded Screw 18 Screw Hole 19 Screw 20 Foldable Terminal 21 IDC Terminal 22 Protrusion 23 Screw 24 Connected Conductor 25 Blade Mold 26,28 Claw 27,29 Disc 30 Notch for ratchet receiving 31 Ratchet

Claims (4)

[Claims] 1. A plug insertion port for inserting a flat cable, and an embedding screw screwed so as to be crimped to a conductor inside an end of the flat cable inserted from the cable insertion port, the embedding screw A terminal block characterized in that a screw hole for fixing a terminal of a single wire cable is formed in a central portion of the terminal block. 2. A terminal electrically connected to an internal conductor is fixed to an end portion of the flat cable, and a lower end surface of the embedded screw is crimped to the terminal. Terminal block described in. 3. The terminal block according to any one of claims 1 to 3, wherein a blade die for cutting out an insulator of the flat cable is formed on a lower end surface of the embedded screw. 4. A ratchet receiving notch provided on a part of an outer periphery of an upper end of the embedding screw, and a part of an inner periphery of an upper end of a screw hole of the embedding screw falling into the notch for receiving the ratchet. The terminal block according to claim 1, further comprising a ratchet for maintaining a constant height of the embedded screw.