JPS6348149B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a feed-in for wiring ducts.

A conventional feed-in for wiring ducts is shown in FIG. In other words, for this feed-in, the terminal block 2 is fixed to the mounting base 1, the rear ends of the pair of terminals 3 are evenly distributed from the center of the terminal block 2, and the wiring duct (not shown) is fixed. The tip of the terminal 3 is covered with a cap 5 provided with a flange 4 that fits on the end, and fixed with a screw 5a, and the plug blade 3a of the terminal 3 is made to protrude from the side of the cap 5. Terminal screw 6 for connecting power line (not shown)
The rear end portion of the terminal 3 including the terminal screw 6 is covered with a U-shaped cover 7 for preventing exposure of the live part, and is fixed to the terminal block 2 with a set screw 8.

This feed-in is performed by pushing the cap 5 into the end of the wiring duct and pressing the plug blade 3a of the terminal 3 against the conductor of the duct to supply power to the wiring duct.

However, this feed-in is
Since the cover 7 is separated and fixed with a set screw 8, it is necessary to remove the cover 7 when connecting the power line, and there is a risk of accidentally dropping the cover 7 or losing the cover 7 or set screw 8. There is a drawback that it can be done. Also, for this reason, cover 7
It requires a sturdy structure and has a box-like shape, which has the disadvantage of being larger than necessary.

Therefore, the feed-in which is the basis of this invention and which prevents the cover from falling off is shown in FIGS. 2 to 5. That is, in this feed-in, a cover 9 is formed by bending a resin material in an L shape, a mounting tongue piece 10 is provided at one end of the cover, and a thin wall portion 11 is formed at the joint part to form a hinge made of the resin material. A knock-out portion 13 is formed at the other end for passing the power line 12 through, and the mounting tongue 10 of the cover 9 is fixed to the edge of the cover mounting opening 2a of the terminal block 2 with rivets 14. The rest of the structure is the same as that in FIG. 1, and 15 is a wiring duct and 16 is a conductor thereof.

This feed-in is performed by opening the cover 9, tightening the power wire 12 to the terminal screw 6, removing the knock-out portion 13 and closing the cover 9, passing the power wire 12 through the knocked-out removed portion, and then closing with the set screw 17. Fix the lid in place. 2b is a cover support part, and 2c is a mounting hole. In this way,
When inserted into the end of the wiring duct 15, it is positioned by the cap 5 and the plug blade 3a of the terminal 3 is inserted into the conductor 16.
press against.

This feed-in has the following advantages. That is, (1) It is no longer necessary to remove the cover 9 when connecting electric wires, so there is no need to lose or drop the cover 9, and there is no risk of the cover 9 being used without it being attached by mistake, improving safety. The price has also increased.

(2) Construction time has been simplified, and maintenance and inspection has become easier.

(3) Both the cover 9 and the terminal block 2 can be configured to be small, and the overall size can be reduced.

(4) Material savings can be achieved and costs can be reduced.

(5) If you leave a burr in the insertion hole 9a of the screw 17 of the cover 9 so that the screw 17 can be caught, the screw 1
It can also prevent powder loss and falling off.

However, the above feed-in is
Since the cover 9 was attached with the studs 14, the following problem occurred. That is, (1) the studs 14 become loose and fall off due to repeated opening and closing of the cover 9;

(2) Since the wall thickness of the driving part of the rivet 14 is not sufficient, the hole may crack when driving the rivet.

(3) Since the head of the stud 14 is made flush with the cover within the restricted dimensions, the thickness of the head is extremely thin and may break if handled roughly.

(4) Since the studs 14 are driven in parallel to the terminals 3, when metal studs are used, the width direction becomes large because it is necessary to ensure an insulation distance P as shown in FIG. On the other hand, in the case of plastic tacks, strength is an issue.

It is therefore an object of the present invention to provide a feed-in for wiring ducts having a hinged cover which can solve these problems.

A first embodiment of the invention is shown in FIGS. 6 to 9. That is, this wiring duct feed-in has a recess 18b formed at the edge of the cover mounting opening 18a of the terminal block 18, a tapered protrusion 19 integrally protruding from the recess 18b, and a mounting tongue having a hinge portion of the cover 20. 21 is formed with an engagement hole 22 to fit into the protrusion 19, and an engagement hole 24 is formed at the edge of the charging port of the cap 23, and the protrusion 19 protruding from the upper part of the mounting tongue piece 21 has its taper 19a. By crossing over and mating, the cap 23 is attached to the mounting tongue 2.
1, the cap 23 is positioned and mounted, and fixed with the screw 5a. The other configurations are the same as those in FIGS. 2 to 5.

This configuration provides the following effects. That is, (1) the cover 20 does not come off unless the cap 23 is removed, improving the reliability of cover attachment.

(2) The number of parts has been reduced and ease of assembly has been improved.

(3) Since metal studs are not used, sufficient insulation distance can be ensured, making it possible to downsize (in the width direction).

A second embodiment of this invention is shown in FIGS. 10 and 1.
Shown in Figure 1. That is, this wiring duct feed-in has a fitting recess 26 formed in the terminal block 25, an engagement hole 28 formed in the cap 27, and a projection 3 protruding from both sides of the mounting tongue 30 of the cover 29.
1 and 32 are integrally formed, and a taper 32a is attached to the tip on the cap mounting side. The rest is the same as the first embodiment, and has the same effects.

A third embodiment of this invention is shown in FIGS. 12 and 1.
Shown in Figure 3. That is, in this wiring duct feed-in, a fitting recess 34 is formed in the terminal block 33, a protrusion 36 is formed on the lower surface of the mounting tongue 35 to fit into the fitting recess 34, and a projection 36 is formed on the upper surface of the mounting tongue 35. A concave portion 37 is formed, and a tapered protrusion 39 for getting over is projected from the cap 38 and is fitted into the concave portion 37. The rest is the same as the first embodiment, and has the same effects.

As described above, the feed-in for a wiring duct of the present invention includes a mounting base, a terminal block whose lower surface engages with one longitudinal end of the mounting base, and a base end supported by the upper surface of the terminal block. A terminal whose tip end has a plug blade extending toward the other end in the longitudinal direction of the mounting base, and a mounting tongue engages with the projection side of the plug blade on the top surface of the terminal block to form a base end portion of the terminal. A thin hinged cover covers the lead wire connection part so that it can be opened and closed freely.
A first screw that fastens the cover to the mounting base via the terminal block when the cover is closed; The duct guide cap is provided with a duct guide cap that fits into the protruding side of the blade and engages with the upper surface of the mounting tongue, and a second screw that fixes this cap to the mounting base, making it easy to attach the cover with rivets. Compared to this, the installation reliability associated with opening and closing is improved, the number of parts can be reduced, and the ease of assembly is improved.
Furthermore, insulation can be easily secured and miniaturization can be realized.

[Brief explanation of drawings]

Fig. 1 is a perspective view of a conventional example, Fig. 2 is a perspective view of the feed-in which is the basis of this invention, Fig. 3 is a perspective view of the feed-in in use, Figs. 4 and 5 are longitudinal sectional views thereof, and Fig. 6 The figure is an exploded perspective view of the first embodiment of the present invention, FIG. 7 is a sectional view thereof, FIG. 8 is a sectional view of the main part thereof, FIG. A sectional view of the main part of the embodiment, Fig. 11 is the XI-XI
12 is a cross-sectional view of the third embodiment, and FIG. 13 is a cross-sectional view thereof along the line. 1... Mounting base, 3... Terminal, 5a... Screw, 17... Screw, 18, 25, 33... Terminal block, 20, 29... Cover, 21, 30, 35...
...Mounting tongue piece, 23, 27, 38...Cap, 1
9, 31, 32, 36, 39... protrusion, 22, 2
8... Engagement hole, 26, 34, 37... Recess.

Claims (1)

[Claims] 1 A mounting base, a terminal block whose lower surface engages with one end in the longitudinal direction of the mounting base, and a base end supported by the upper surface of the terminal block and a plug blade at the tip that engages with the other end in the longitudinal direction of the mounting base. A terminal extending to the end side,
A cover with a thin hinge that has a mounting tongue that engages with the protruding side of the plug blade on the top surface of the terminal block to freely open and close the lead wire connection portion at the base end of the terminal; A first screw that fastens the cover to the mounting base via the terminal block, a lower surface of which engages the other end of the mounting base, and one end of which fits into the plug blade protruding side of the terminal block. A feed-in for a wiring duct, comprising: a duct guide cap that engages with the upper surface of the mounting tongue; and a second screw for fixing the cap to the mounting base.