JPH055794Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a connector for connecting a flexible conduit and a wire box.

(Prior Art) Various connectors of this type have been provided in order to reliably connect the flexible conduit to the connector with a simple operation, but in all cases, once the flexible conduit Once the conduit is connected to the connector, removal of the flexible conduit becomes either difficult or cumbersome. For this reason, when connecting a flexible conduit to a wire box via a connector at a construction site, for example, if the flexible conduit is cut longer or shorter than the length actually used, the flexible conduit There was a problem in that it was extremely troublesome to remove the connector from the connector, and the connection work could not be performed quickly.

The present invention was devised in view of the above circumstances, and its purpose is to not only connect a flexible conduit to a connector reliably with a simple operation, but also to It is an object of the present invention to provide a connecting tool for connecting a flexible conduit and a wire box, which allows the pipe to be removed from the connecting tool with great ease.

(Means for Solving the Problems) In order to achieve the above object, the present invention has a cylindrical first connector that is connected to a wire box, and has a
An engagement hole is formed in which the side surface of the hole on the wire box side gradually slopes downward toward the side surface of the hole opposite to this side surface.
Flexible wires are provided at predetermined intervals in the circumferential direction, and are connected to the inner surface of the peripheral wall located between the engagement holes by being inserted through an opening on the opposite side to the wire box side through a second connector. A thick wall portion having an inner diameter slightly larger than the outer diameter of the tube is provided, and the second connector further has arm portions formed at a predetermined angular interval corresponding to the engagement hole in the annular base, and the arms an engaging portion that engages with the engaging hole is formed at the tip of the portion, and a tip end surface of the engaging portion is formed into a tapered surface along an inclined surface of a side surface of the wire box side hole of the engaging hole; An engaging pawl that engages with at least the trough of the flexible conduit tube is formed on either the inner surface of the arm portion or the inner surface of the engaging portion.

(Function) If the flexible electrical conduit is inserted through the base of the second connector and exposed to the inner surface of the arm and the engaging portion, the engaging claw of the second connector will be engaged with the valley of the flexible electrical conduit. can be combined.

Furthermore, the second connector can be connected to the first connector by inserting the engaging portion of the second connector into the peripheral wall of the first connector and engaging the engagement hole.

Therefore, by inserting and engaging the flexible conduit into the second connector while the second connector is connected to the first connector, the flexible conduit can be connected to the first connector.

Furthermore, if the base of the second connector is pressed from this state, the engaging portion can expand along the slope of the engaging hole, and in this state, the engaging claw and the valley of the flexible conduit are engaged. You can cancel the relationship.

Furthermore, since a thick wall portion with an inner diameter slightly larger than the outer diameter of the flexible conduit is provided on the inner surface of the peripheral wall portion located between the engagement holes of the first connector, the It is possible to prevent bending and deformation of the flexible conduit.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

In the figure, 1 is a side wall of the wire box 4, and 2 is a first connector made of resin in which a small-diameter cylindrical portion 21 and a large-diameter cylindrical portion 22 are integrally formed. A threaded portion 21a is formed so that the wire box A can protrude into the wire box A by being inserted into a hole 1a formed in the side wall 1 of the wire box A. 22a
Rectangular engagement holes 23 are formed at three locations in the circumferential direction at equal angular intervals. This engagement hole 2
3 is one hole side surface 2 on the wire box A side, respectively.
3a is formed so as to be gradually inclined downward toward the other hole side surface 23b that faces it, and the other hole side surface 23b is formed in a direction perpendicular to the axial direction of the large diameter cylindrical portion 22. be.

Further, on the inner surface of the peripheral wall portion 22a located between the engagement holes 23 of the first connector 2, a thick wall portion 25 having an inner diameter slightly larger than the outer diameter of the flexible conduit 3 is formed. There is.

Further, on the outer surface of the inner wall portion 22a located between the engagement holes 23 of the first connector 2, recessed portions 26 having a circular shape in plan view and a curvature are formed to facilitate gripping.

The flexible electrical conduit 3 is a well-known one in which valleys 31 and peaks 32 are alternately formed in the axial direction on the peripheral wall.

4 is a second connector made of resin. This second connector 4 has a peripheral wall portion 2 of the first connector 2 on one side of an annular base 41 through which the flexible conduit 3 is inserted.
2a, the arm portion 42 is inserted from the opening 24 on the side opposite to the wire box A side of the first connector 2,
Three pieces are integrally formed to protrude in correspondence with the spacing between the respective engagement holes 23..., and an engagement part 43 that engages with the engagement hole 23 is integrally formed at the tip of each arm part 42... At the same time, the distal end surface 43a of each engaging portion 43 is connected to one hole side surface 23a of the engaging hole 23.
It is formed into a tapered surface along the inclined surface. Further, the rear surfaces 43b of each of the engaging portions 43 are formed to be inclined in the same direction as the tapered surfaces of the tip surfaces 43a. Furthermore, a pair of wedge-shaped engaging claws 44 are integrally formed on the inner surfaces of the engaging portions 43, respectively, and engage with the troughs 31, 31 so as to straddle the peaks 32 of the flexible conduit 3. When the engaging claws 44, 44 engage with the troughs 31, 31 of the flexible electrical conduit 3, they will not come off to the right in the figure. Note that the base 41 of the second connector 4 is connected to the first connector as shown in FIG.
It is formed to extend outward beyond the opening 24 of the connector 2 .

5 is a lock nut for connecting and fixing the first connector 2 to the side wall 1 of the wire box A.

In such a configuration, to take an example of connecting the flexible conduit 3 to the wire box A via the first and second connectors 2 and 4, first connect the flexible conduit 3 to the second connector 4. from inside the base 41 of the flexible conduit 4 to the troughs 31, 31 of the flexible conduit 4 through the arms 42...
The engaging claws 44, 44, . . . of the connecting tool 4 are engaged. Next, the arm portions 42 of the second connector 4 are inserted into the large diameter cylindrical portion 22 of the first connector 2, and the arm portions 42
The engaging portions 43 at the tips of the... are respectively engaged with the engagement holes 23 of the first connector 2. Thereafter, the small diameter cylindrical portion 21 of the first connector 2 is passed through the hole 1a of the side wall 1 of the wire box A to protrude into the wire box A, and the lock nut 5 is screwed into the threaded portion 21a of the small diameter cylindrical portion 21. and connect the first connector 2 to the wire box A.
It is fixed to the side wall 1 of the.

In this way, the connection of the flexible conduit 3 to the second connector 4 and the connection of the second connector 4 to the first connector 2 only require insertion work, and the work can be carried out extremely efficiently. be able to. Moreover, when the flexible conduit 3 is connected to the side wall 1 of the wire box A via the first and second connectors 2 and 4, if the flexible conduit 3
Even if a tensile force in the direction of arrow B is applied to the engaging portion 43
Since the rear surface 43b... is tapered, each engaging portion 43... causes an inward diameter reduction displacement due to the tension of the flexible electrical conduit 3, and the flexible electrical conduit of each engaging claw 44... The engagement with the trough 31 becomes even stronger, and the flexible electrical conduit 3 can be reliably prevented from being pulled out.

When the tensile force acting on the flexible conduit 3 is large, the inward diameter reduction displacement of each engaging portion 43 increases, and the movable conduit 3 follows this.
However, from the state shown in Fig. 5 to the state shown in Fig. 6,
If the first connector 2 is bent and deformed into the space where each engagement claw 44 is not provided, the engagement relationship between the engagement hole 23 and the engagement portion 43 is released, and the first connector 2 is flexible. The second connector 4 would come off while the conduit 2 is still engaged, but since the thick wall portion 25 is placed in that space, this deflection can be prevented, and the flexible conduit 3 can be prevented from deflecting. Even if a large tensile force is applied, the flexible electrical conduit 3 can be reliably prevented from being pulled out.

In addition, if you accidentally cut the length of the flexible conduit 3 at a construction site and want to remove the flexible conduit 3, press the base 41 of the second connector 4 in the direction C in the figure. do it. Then, the taper of the distal end surface 43a of each engaging portion 43 causes the diameter to expand outward along the hole side surface 23a of the engaging hole 23 of the second connector 4, and each engaging portion 43... The mating claws 44 separate from the valleys 31 of the flexible conduit 3 and close the flexible conduit 3.
can be easily pulled out. In this way, the flexible electrical conduit 3 can be easily pulled out by pressing the base 41 of the second connector 4, and the connection work can be easily corrected.

In addition, in the embodiment, the rear surface 43 of each engaging portion 43
Although b is tapered, the present invention is not limited to this case, and the rear surface of each engaging portion 43 may be formed so as to be parallel to the other hole side surface 23b of the engaging hole 23. .

In this case, when a large tensile force is applied to the flexible conduit 3 in the pulling direction, the flexible conduit 3 itself tends to be bent and deformed as it attempts to disengage from each engaging claw 44, as shown in FIG. However, by blocking the bending with the thick wall portion 25, the flexible electrical conduit 3 can be reliably prevented from being pulled out.

Further, in the embodiment described above, the engaging claw 44 is connected to the engaging portion 4.
However, the present invention is not limited to such a case, and the engaging claw 4 is formed on the inner surface of the arm portion 42.
4 may be formed, and each engaging portion 4
Engaging claws may be formed on the inner surface of the arm portion 3 and the inner surface of each arm portion 42, respectively.

Further, in the embodiment described above, the lock nut 5 is screwed into the threaded portion 21a of the small-diameter cylindrical portion 21 of the first connector 2, but of course, as shown in FIG. Threaded portion 25a formed on the peripheral surface
Alternatively, the lock bolt 10 may be screwed into the lock bolt 10.

Furthermore, in the embodiment, the arm portion 42 and the engaging portion 4
3 is formed in three places, but the present invention is not limited to such a case; the thick part 25 is formed in two or four or more places, and similarly, the thick part 25 is formed in two or four or more places. It may be provided over the entire area.

(Effect of the invention) As described above, according to the invention, if the flexible conduit is inserted through the base of the second connector and exposed to the inner surface of the arm part and the engaging part, the second connector can be opened. The engaging claw engages with the trough of the flexible conduit, and when the engaging portion of the second connecting device is inserted into the peripheral wall of the first connecting device and engaged with the engaging hole, the second connecting device is connected. is connected to the first connector. Therefore, the work of connecting the flexible conduit to the connector can be performed extremely efficiently by only inserting the conduit. Moreover, since the engaging claw of the second connector engages with the trough of the flexible electrical conduit, it is possible to reliably prevent the flexible electrical conduit from coming off.

In addition, even when a large tensile force is applied to the connected flexible conduit, the inner surface of the inner wall located between the engagement holes of the first connector has a diameter slightly larger than the outer diameter of the flexible conduit. Since the thick portion of the inner diameter is provided, the flexible electrical conduit itself is prevented from being bent and deformed in an attempt to come off from the first connector, and the flexible electrical conduit can be reliably prevented from coming off.

Furthermore, even if a situation arises where you want to separate the flexible conduit from the connector at a construction site, if you press the base of the second connector toward the wire box, the engaging portion will expand and the engaging claw will open. The engagement relationship between the conduit and the trough of the flexible conduit is released, and the flexible conduit can be easily pulled out from the second connector. Therefore, even when the connection is to be corrected at the construction site, this can be done easily and quickly.

[Brief explanation of the drawing]

Figures 1 to 6 show an embodiment of the present invention, with Figure 1 being an exploded perspective view, Figure 2 being a sectional view, and Figure 3 being an exploded perspective view.
The figure is a cross-sectional view of the first connector, and Figure 4 is Figure 3-
5 and 6 are explanatory views, FIG. 7 is an explanatory view of another embodiment of the present invention, and FIG. 8 is a sectional view showing still another embodiment of the present invention. A... Electric wire box, 2... First connection tool, 21
a... Peripheral wall portion of the first connector, 23... Engagement hole, 2
3a... One hole side (hole side on the wire box side), 23b... The other hole side, 24... Opening of the first connector, 25... Thick part, 3... Flexible conduit, 31...Tanibe, 4...Second connector, 41...
Base portion, 42... Arm portion, 43... Engagement portion, 43a...
...Distal end surface of the engagement portion, 44...Engagement claw.

Claims (1)

[Scope of utility model registration request] A circumferentially predetermined engagement hole is provided in the circumferential wall of the cylindrical first connector that connects to the wire box, so that the side surface of the hole on the wire box side gradually slopes downward toward the side surface of the hole opposite to this side surface. The outer diameter of the flexible conduit is inserted and connected to the inner surface of the peripheral wall portion located at intervals between the engagement holes through the second connector from the opening on the opposite side to the wire box side. The second connector is provided with a thick wall portion having a slightly larger inner diameter, and the second connector has arm portions formed at predetermined angular intervals corresponding to the engagement holes on the annular base portion, and a tip of the arm portion. An engaging portion that engages with the engaging hole is formed, and the distal end surface of the engaging portion is formed into a tapered surface along the inclined surface of the side surface of the wire box side hole of the engaging hole, and the inner surface of the arm portion is formed. and a connecting tool for connecting a flexible electrical conduit and a wire box, characterized in that an engaging claw is formed on one of the inner surfaces of the engaging portion to engage with at least a valley portion of the flexible electrical conduit.