JPH019215Y2 - - Google Patents

Description

[Detailed explanation of the invention] (Prior art) Conventionally, when connecting corrugated conduit pipes,
With the ring that has a locking claw on the inside inserted into the receiver, insert the corrugated conduit into the receiver and engage the recessed valley of the corrugated conduit with the locking claw of the ring. It is common to have a configuration that prevents this from happening. However, in this case, once the corrugated conduit was connected to the receiver, the corrugated conduit could not be removed from the receiver without destroying the receiver itself. Therefore, if the corrugated electric conduit is connected incorrectly, the corrugated electric conduit cannot be removed from the receiver, which is extremely troublesome.

(Purpose) The present invention was developed in consideration of the above-mentioned prior art, and its purpose is to remove a corrugated conduit by simply rotating the corrugated conduit or receiver. A connecting device for corrugated conduit is provided that allows the corrugated conduit to be removed from the receiver very easily, and that can reliably connect the corrugated conduit to the receiver when there is no need to remove the corrugated conduit. It is on offer.

(Structure) Reference numeral 1 denotes a receiver, which may be formed integrally with a box for electrical wiring such as an outlet box or a switch box, as shown in FIG.
It may also be used as a coupling or connector; in short, it is sufficient if a corrugated conduit can be inserted therethrough.
The receiving tube 1 has an opening 2 through which a corrugated electric conduit is inserted.

3 is a corrugated electric conduit into which electric wires are inserted. This has alternating peaks 3a and valleys 3b, and the tip of the corrugated conduit 3 is inserted from the opening 2 toward the inside of the receiving tube 1, whereby the corrugated conduit 3 and the receiving tube 1 are connected. In the example shown in the drawings, the widths of the peaks 3a and valleys 3b are each about 2 mm. Note that 9 is the side wall of the valley 3b, and 11 is the ridgeline of the mountain 3a.

Reference numeral 4 denotes a locking pawl, which projects from the inner circumferential wall of the receiving cylinder 1 so as to be inclined with respect to the axial direction 5 of the receiving cylinder 1. The inclination angle α is preferably about 78 degrees.
In the case of the example shown in the drawings, as shown in FIG. position). In this example, a separate locking pawl 4 is attached to the receiving cylinder 1.

Reference numeral 6 denotes a tapered portion formed at the protruding end, which is the protruding tip portion of the locking pawl 4. This tapered portion 6 is for reducing the amount of protrusion of the locking pawl 4 on the side opposite to the opening 2 (the position opposite to the opening 2 of the receiver 1).

As a result of forming such a tapered portion 6, the seventh
In the example shown in the figure, they are formed in series so that the amount of protrusion decreases from the opening 2 side toward the side opposite to the opening 2. In other words, the amount of protrusion on the side opposite to the opening 2 is L ₁
The amount of protrusion on the opening 2 side is _L2 , which is larger than _L1 ( _L1 < _L2 ), and the large protrusion of the locking pawl 4 formed by the tapered part 6 is 4a, The small protrusion is designated as 4b. The tapered portion 6 in the present invention includes the example shown in FIG. 9 in addition to the example shown in FIG. That is, the tapered portion 6 in the example shown in FIG. 9 is formed so that the amount of protrusion of the locking pawl 4 on the side opposite to the opening 2 is made small, and the amount of protrusion of the locking pawl 4 on the side of the opening 2 is made small. , and has a horizontal portion 6a at the boundary between the two.

Now, a typical procedure for connecting the corrugated electric conduit 3 to the receiver 1 and a typical procedure for removing the corrugated electric conduit 3 will be described for each embodiment. That is, in the case of the embodiment shown in FIG. 7, the corrugated electric conduit 3 is inserted into the receiving tube 1 by pushing it with fingers or the like. In this inserted state, the locking pawl 4 is depressed into the concave valley 3b of the corrugated conduit 3, as shown in FIG. Corrugated conduit 3
Press while twisting to the right or left.
In the case of the example in which the locking pawl 4 is inclined by α with respect to the axis 5 as shown in Fig.
While turning the corrugated conduit 3 to the inside of the receiver 1 (arrow 1
0 direction). Then, the large protruding portion 4a of the locking pawl 4 formed by the tapered portion 6 comes into contact with the side wall 9 of the valley 3b of the corrugated conduit 3, as shown in FIG. 5, and is locked. Therefore, even if the corrugated electric conduit 3 is pulled in the opposite direction of the arrow 10, that is, toward the front, the corrugated electric conduit 3 will not come off, and the connection between the corrugated electric conduit 3 and the receiver 1 will be ensured. .

When the corrugated conduit 3 is inserted into the receiver 1, the sixth
As shown in the figure, if the locking claw 4 is
Even when it is touching the ridgeline 11 of a, if you push the corrugated conduit 3 with a twist in the right direction (in the direction of arrow 8), the tapered part 6 of the locking pawl 4 will move down the ridgeline 11. It works like this. As a result, as shown in FIG.
As a result, the large protruding part 4a of the locking pawl 4 formed by the tapered part 6 is locked against the side wall 9 of the valley 3b as shown in FIG. The connection of the cylinder 1 becomes reliable. The reason why the tapered part 6 of the locking pawl 4 acts as if it were going down the ridgeline 11 is that the taper part 6 is provided at the protruding end of the locking pawl 4, and the protrusion of the locking pawl 4 on the side opposite to the opening 2 is This is due to the fact that the amount is small.

On the other hand, when removing the corrugated conduit 3 from the receiver 1, in the case where the locking pawl 4 is inclined by α with respect to the axis 5 as shown in FIG.
Turn it to the left (counter-arrow 8 direction) and pull it towards you (counter-arrow 10 direction). Then, the taper part 6
The small protruding portion 4b of the locking pawl 4 formed by this acts as if climbing the ridgeline 11 of the mountain 3a of the corrugated electric conduit 3. At this time, the locking claw 4 and receiver 1
The corrugated electric conduit 3 may be bent and deformed, so it is desirable that they be made of synthetic resin so that they can be deformed to some extent. As the corrugated conduit 3 continues to be turned to the left, the tapered portion 6 of the locking pawl 4 gradually climbs the ridgeline 11 of the peak 3a of the corrugated conduit 3 and reaches the sixth point.
The state shown in the figure will be reached. The reason why the tapered part 6 of the locking claw 4 climbs the ridge line 11 of the mountain 3a of the corrugated conduit 3 in this way is that the tapered part 6 is provided at the protruding end of the locking claw 4, and the opposite opening 2 of the locking claw 4 is formed. This is due to the fact that the amount of side protrusion is small. If the tapered part 6 of the locking pawl 4 is made to climb the ridgeline 11 of the peak 3a of the corrugated conduit 3 in this way, then if the corrugated conduit 3 is pulled toward you (in the direction opposite to the arrow 10), The corrugated electric conduit 3 can be removed from the receiver 1.

The procedure for connecting and removing the corrugated electric conduit 3 in the embodiment shown in FIG. 9 will now be described. That is, in the case of this embodiment, the tapered portion 6 is
Since the locking claw 6 is formed so that the amount of protrusion on the side opposite to the opening 2 is small, and the amount of protrusion of the locking claw 6 on the side opposite to the opening 2 is small, the corrugated conduit 3 can be placed in the receiver. 1
Since the corrugated conduit 3 can be inserted by turning it either to the left or to the right, insertion of the corrugated conduit 3 is easy and convenient. In the case of this embodiment, as shown in FIG.
It falls into the valley 3b and is locked against the side wall 9 of the valley 3b. Also, when removing the corrugated electric conduit 3 from the receiver 1, the corrugated electric conduit 3 can be pulled out toward the front while turning the corrugated electric conduit 3 either to the left or to the right.

In the above example, the corrugated electric conduit 3 is rotated, but depending on the case, the receiving tube 1 may be rotated.

(Effects) With the present invention configured as described above, when it becomes necessary to remove the corrugated conduit 3 from the receiver 1, such as when the corrugated conduit 3 is connected incorrectly,
The corrugated electric conduit 3 can be removed from the receiver 1 by a very simple operation such as turning the corrugated electric conduit 3 or, as the case may be, the receiver 1.

Of course, if there is no need to remove the corrugated conduit 3, the locking claws 4 are depressed into the valleys 3b of the corrugated conduit 3, so even if the corrugated conduit 3 is pulled, it cannot be removed. Therefore, corrugated conduit 3
and the receiving tube 1 can be reliably connected.

[Brief explanation of the drawing]

Fig. 1 is a vertical sectional side view of the state in which the corrugated conduit is connected to the receiver, Fig. 2 is a plan view of the state in which the locking pawl is attached to the receiver, Fig. 3 is a cross-sectional view of the same, and Figs. FIG. 6 and FIG. 10 are plan views for explaining the operating state;
FIG. 7 is a perspective view of the locking pawl, FIG. 8 is a perspective view for explaining the operating state, and FIG. 9 is a perspective view of another example of the locking pawl. In the figure, 1 is a receiver, 2 is an opening, 3 is a corrugated conduit, 3
a is a mountain, 3b is a valley, 4 is a locking pawl, 5 is an axial direction, 6
indicates a tapered part.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) (a) A receiver having an opening and into which a corrugated electric conduit having alternating successive peaks and valleys is inserted inward from the opening for connection. (b) A locking pawl protruding from the inner circumferential wall of the receiver so as to be inclined with respect to the axial direction of the receiver; (c) A locking pawl that protrudes to a small extent on the side opposite to the opening. A connecting device for a corrugated conduit, comprising: a tapered portion formed at the protruding end of a locking claw; and (d). (2) The corrugated electric wire according to claim 1 of the utility model registration, characterized in that the tapered portion is formed in a series such that the amount of protrusion decreases from the opening side to the side opposite to the opening. Connecting device for pipes. (3) The tapered part is formed so that the amount of protrusion of the locking pawl on the side opposite to the opening is small, and the amount of protrusion of the locking pawl on the opening side is small, and a horizontal part is provided at the boundary between the two. A connecting device for a corrugated electric conduit as set forth in claim 1 of the utility model registration claim.