JPH10125390A - Connector for waterproof, flexible conduit tube - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a connector by which a waterproof flexible conduit tube can be connected to other apparatus or the like in a single operation, while keeping high waterproofs. SOLUTION: A plug pin 25 having the property of a spring is freely removably inserted into a plug part 30 provided on a tubular main body 21, and when a bushing 22 screwed into a flexible conduit tube 11 is fitted into the main body 21, the plug pin 25 is latched to a latching groove 36 provided in the bushing 22. Waterproofness between the bushing 22 and the flexible conduit tube 11 is maintained by a first packing 23, and waterproofness between the bushing 22 and the main body 21 is maintained by a second packing 24.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connector for connecting a waterproof flexible conduit to another device such as a rigid conduit or a terminal box.

[0002]

2. Description of the Related Art When an insulated wire or an electric cable is laid underground or attached to a building or a frame, it is often protected by a conduit. However, if there is a stepped portion or a portion subject to vibration in the installation route, it is necessary to interpose a flexible conduit between the hard conduits. Also, flexible conduits are often used for connecting the conduit to the terminal box of the equipment. Conventionally, flexible conduits generally used generally have a metal wire spirally embedded in a peripheral wall of a flexible cylindrical body such as rubber or soft plastic, and the peripheral wall is formed of a spiral metal wire. It has a bellows body with irregularities along it. When there is a possibility that the used portion of such a flexible conduit will be flooded from the outside, a waterproof flexible conduit is used. Such flexible conduits are further provided with a waterproof layer on the outer periphery to ensure waterproofness. And a waterproof connector is used for the connection part.

FIG. 5 is a diagram showing a conventionally used waterproof connector and a state in which the waterproof flexible conduit is connected to another device using the connector. In FIG. 5A showing the disassembled state of the connector, the connector 1 includes a main body 2, a collar 3, a cap nut 4, a first packing 5, a second packing 6, and a nut 7. Body 2
Is a cylindrical body, and has a flange 8 at an intermediate portion thereof to which a rotating tool such as a wrench can be engaged, and a first thread provided with male threads on both sides thereof.
And the second connecting portion 10. Then, the cap nut 4 is screwed into the first connection portion 9 and the second connection portion 1 is screwed.
The nut 7 is screwed into the nut 0. The collar 3 includes a cylindrical inner wall having spiral irregularities, and a cylindrical outer wall having a plurality of slits extending in the axial direction by being folded from an end of the inner wall. It has been expanded to. FIG. 5B shows a state in which the flexible conduit 11 is being connected to another device 12 such as a terminal box using the connector 1, and FIG. 5C shows a state in which the connection has been completed.

[0004]

However, the above-mentioned conventional connector 1 requires time and effort for tightening and removing with the cap nut 4 when attaching and detaching the flexible conduit tube 11 to and from another device. There was a problem. Further, in the conventional structure, there is a problem that the waterproofness is affected by the tightening of the cap nut 4. Accordingly, an object of the present invention is to provide a new waterproof flexible conduit connector that solves such a conventional problem.

[0005]

According to the present invention, there is provided a connector for connecting a waterproof flexible conduit tube 11 having a spiral uneven portion formed on an inner wall thereof to another device or the like. First connecting portion 2 connected to flexible conduit 11
7 and a second connecting portion 28 connected to another device or the like can be screwed into a cylindrical main body 21 provided coaxially in the axial direction, a hook groove 36 on the outer periphery, and an inner wall of the flexible conduit tube 11. A bushing 22 provided with a helical uneven portion,
The insertion pin 25 having a spring property is inserted into the insertion portion 30 provided in the first connection portion 27 of the main body 21 from the outside through the through hole 3.
The bushing 22 is detachably inserted into the inside 2 and protrudes from the inner peripheral surface thereof, and is screwed into the flexible conduit tube 11 via the first packing 23.
The insertion pin 25 is hooked into the engaging groove 36 of the bushing 22 by being fitted into the first connecting portion 27 of the main body 21 through the main body 21. With this configuration, the bushing 2
2 can be hooked on the main body 21.

In a preferred embodiment of the present invention,
The insertion portion 30 is formed by a pair of the through holes 32 provided on the peripheral wall of the first connection portion 27 of the main body 21.
Each of the legs 25a of the insertion pin 25 having the shape of a letter
2, respectively. With this configuration, the insertion pin 25 is easily bent by the tapered portion 37, so that the bushing 22 can be more easily connected to the main body 21. In still another preferred embodiment of the present invention, a tapered portion 37 is formed at the tip of the main body fitting portion 34 in the bushing 22.

Further, another preferred embodiment is the first embodiment.
The packing 23 includes a ring portion 38 that contacts the distal end surface of the flexible conduit 11 and a cylindrical portion 23 that extends from the outer peripheral edge of the ring portion 38 so as to be bent and contacts the outer peripheral surface of the flexible conduit 11. Things. When such a packing is used, in a state where the bushing 22 is connected to the main body 21, the cylindrical portion 39 is pressed against the outer periphery of the flexible conduit tube 11 by the main body 21, so that the flexible conduit tube is cooperated with the ring portion 38. Waterproofing between the bushing 11 and the bushing 22 can be ensured. In another preferred embodiment, a step portion 29 is provided in the first connection portion 27 of the main body 21, and the second packing 24 formed in a ring shape is provided on the radial surface of the step portion 29 and the bushing 22. Are interposed between the tips of the
With this configuration, it is possible to more reliably waterproof the main body 21 and the bushing 22.

[0008]

Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view of a state in which the connector of the present invention is disassembled, FIG. 2 is a front sectional view showing a state in which a waterproof flexible conduit is connected to the connector of FIG. 1, and FIG. FIG. 4 is a bottom view of FIG. 2 as viewed from below. In these figures, the connector 20 includes a main body 21, a bushing 22, a first packing 23, a second packing 24, and an insertion pin 25. Note that 11
Is a waterproof flexible conduit having a spiral uneven portion formed on the inner wall. The main body 21 formed in a cylindrical shape has a flange 26 at the center of which a fastening tool such as a wrench is engaged.
A first connection portion 27 is provided on one side, and a second connection portion 28 having a male screw or a female screw formed on the other side. The bushing 22 is connected to the first connecting portion 27.
Are fitted to connect the two, and the second connecting portion 28 is screwed to another instrument or the like using a nut or the like (not shown).

The first connecting portion 27 having no threaded portion forms a step portion 29 (see FIG. 2) by making its inner diameter larger than the inner diameter of the second connecting portion 28. An arc groove 31 is formed along the outer peripheral portion of the first connection portion 27, and a pair of through holes 32 (see FIG. 3) penetrating the peripheral wall are provided at both ends of the arc groove 31, and these arc grooves are provided. An insertion portion 30 is constituted by 31 and a pair of through holes 32. As shown in FIG. 3, the through-hole 32 is formed so that the outside and the inside of the peripheral wall are biased, thereby stably holding the inserted pin 25 inserted. Further, the tip of the through hole 32 penetrates to the opposite side of the first connection portion 27 (see FIG. 4). Further, a substantially vertical groove 33 intersecting with the circular groove 31 is provided substantially at the center thereof.
, The insertion pin 25 can be easily pulled out by a fingertip or a hook.

The bushing 22 formed in a cylindrical shape is a first bushing.
Body fitting portion 34 having an outer diameter fitted into connecting portion 27 of
And a flexible conduit threaded portion 35 provided on the outer periphery with a helical uneven portion capable of being screwed into the inner wall of the flexible conduit. The main body fitting portion 34 is provided with an engaging groove 36 for hooking the insertion pin 25 on the outer periphery thereof, and a tapered portion 37 is formed at the tip thereof. The insertion pin 25 is formed in a U-shape, and the distal ends of both legs 25a are bent outward. The insertion pin 25 is inserted into the insertion portion 30 by sandwiching it with fingers so that the leg portions 25a approach, and then the finger is released, thereby achieving a stable holding state as shown in FIG. The main body 21 and the bushing 22 are made of a metal material such as cast steel, stainless steel or brass, and the insertion pin 25 is made of a piano wire or spring steel.

The first packing 23 is made of an elastic material such as rubber or plastic, and as shown in FIG. 1 or FIG. A cylindrical portion 39 that is bent from the outer peripheral edge of the ring portion 38 and extends and contacts the outer peripheral surface of the flexible conduit tube 11 is integrally formed. The second packing 24 is also made of the same material as the first packing 23, has a cylindrical portion 40 and a pair of flange portions 41 at both ends thereof, and is formed in a ring shape as a whole. The second packing 24 is compressed and interposed between the radial surface of the step portion 29 in the first connection portion 27 and the tip of the bushing 22. The repelling force functions to push the insertion pin 25 against the insertion portion 30 of the bushing 22 from the lateral direction so as not to fall off naturally. The second
By making the packing 24 of such a shape, the waterproof action and the repulsion action can be enhanced, but in some cases, a disc-shaped packing generally used for sealing may be used.

In order to connect the waterproof flexible conduit tube 11 to another device or the like using the connector 20, the following procedure may be used. First, the second connection portion 27 of the main body 21 is
Is inserted, and the insertion pin 25 is inserted into the insertion portion 30 provided in the connection portion 27 from the outside in advance. Next, the flexible conduit tube 1 in which the first packing 23 is fitted at the end.
1 is screwed into the bushing 22. Next, the bushing 22 is inserted into the first connection portion 27. Then, the bushing 22 advances while bending the insertion pin 25 at its tip, and stops when the insertion pin 25 engages with the engagement groove 36 of the bushing 22 by its spring property. In this state, the bushing 22 does not come off from the main body 21 and the flexible conduit tube 11 and the main body 21 are tightly connected with waterproofness. Other devices and the like are connected to the second connection portion 28 of the main body 21, but this portion has the same configuration as that of the related art, and before the bushing 22 is connected to the main body 21 as described above, or It may be connected to another device or the like at any time later. In order to separate the flexible conduit 11 from other devices or the like, the insertion pin 25 may be pulled out from the outside of the main body 21 to separate the flexible conduit 11 and the main body 21 in the axial direction.

[0013]

By using the connector of the present invention as described above, the waterproof flexible electric conduit can be attached and detached to another appliance such as an electric conduit or a terminal box with one touch while ensuring high waterproofness. be able to. Therefore, it is extremely easy to lay or change the electric wiring or to perform maintenance and inspection.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a connector of the present invention.

FIG. 2 is a front sectional view showing a state in which a waterproof flexible conduit is connected to the connector of FIG. 1;

FIG. 3 is a sectional view taken along line AA of FIG. 2;

FIG. 4 is a bottom view of FIG. 2 as viewed from below.

FIG. 5 is a view showing a conventionally used waterproof connector and a state in which the waterproof flexible conduit is connected to another device using the connector.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Connector 2 Main body 3 Collar 4 Cap nut 5 First packing 6 Second packing 7 Nut 8 Flange 9 First connection part 10 Second connection part 11 Flexible conduit tube 12 Other equipment 20 Connector 21 Main body 22 Bushing 23 First packing 24 Second packing 25 Insertion pin 25a Leg 26 Flange 27 First connection 28 Second connection 29 Step 30 Insert 31 Arc groove 32 Through hole 33 Vertical groove 34 Body insertion part 35 Flexible conduit threaded part 36 Engagement groove 37 Tapered part 38 Ring part 39 Tube part 40 Tube part 41 Flange part

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Kenichi Nakayama 1-26-5 Kichijoji Honmachi, Musashino City, Tokyo Lead Engineering Co., Ltd. (72) Inventor Tokuaki Nakamura 1-26-5 Kichijoji Honmachi, Musashino City, Tokyo Lead Engineering Co., Ltd.

Claims (5)

[Claims] 1. A connector for connecting a waterproof flexible conduit tube 11 having a spiral uneven portion formed on an inner wall thereof to another device or the like, wherein a first connection to the flexible conduit tube 11 is provided. A cylindrical main body 21 in which a second connecting portion 28 for connecting to the portion 27 and other equipment is provided coaxially in the axial direction; and a threaded groove 36 on the outer periphery and screwed into the inner wall of the flexible conduit tube 11. Bushing 22 provided with possible spiral irregularities
The insertion pin 25 having a spring property is provided in the insertion portion 30 provided in the first connection portion 27 of the main body 21 from the outside through the through hole 3.
The bushing 22 is detachably inserted into the main body 2 through the first packing 23 and screwed into the flexible conduit tube 11 through the second packing 24. Wherein the insertion pin 25 is engaged with the engaging groove 36 of the bushing 22 by being fitted into the first connecting portion 27 of the connector. 2. The insertion portion 30 is connected to the first connection portion 2 of the main body 21.
7, each leg 25 of the U-shaped insertion pin 25 formed by a pair of the through holes 32 provided in the peripheral wall.
The waterproof flexible conduit connector according to claim 1, wherein a is inserted into each of the through holes 32. 3. The main body fitting portion 34 of the bushing 22.
The waterproof flexible conduit connector according to claim 1 or 2, wherein a tapered portion (37) is formed at a tip of the connector. 4. The first packing 23 extends from the outer peripheral edge of the ring portion 38 and the outer peripheral edge of the ring portion 38 in contact with the distal end surface of the flexible conduit tube 11 so as to be provided on the outer peripheral surface of the flexible conduit tube 11. The waterproof flexible conduit connector according to any one of claims 1 to 3, comprising a cylindrical portion (23) in contact with the connector. 5. The stepped portion 2 is provided on the first connecting portion 27 of the main body 21.
9 and a second packing 2 formed in a ring shape
The waterproof flexible conduit connector according to any one of claims 1 to 4, wherein the connector (4) is interposed between a radial surface of the step portion (29) and a tip of the bushing (22).