JPH07303320A - Waterproofing structure for conduit tube connection - Google Patents

Abstract

PURPOSE:To provide a conduit tube connecting device which can always, stably, and surely make conduit tube connections watertight regardless of the kind of conduit tube and tube fitting. CONSTITUTION:A conduit tube connecting device which connects adjacent conduit tubes (A) to each other or a conduit tube to a wiring box with a coupling, box connector, or other tube fittings (B) wraps the connection between adjacent conduit tubes (A) or a conduit tube and wiring box with an elastic waterproofing cover (C) which can be versatilely used regardless of the kinds of the conduit tube (A), wiring box (18), and tube fitting (B). In addition, both end sections (12) of the cover (C) are made to watertightly stick to the outer peripheral surfaces of the adjacent conduit tubes (A) or the conduit tube (A) and tube fitting (B).

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a waterproof structure for connecting conduits.

[0002]

2. Description of the Related Art Generally, there are various types of conduits, such as metal pipes with or without screws, flexible tubes, flexible metal spiral pipes, etc., and the conduits and conduits are connected to a wiring box. As a pipe joint for
There are various types such as couplings without screws, couplings with screws, union couplings, box connectors, angle connectors, etc., but in any of them, the waterproofing effect of the connection part is achieved by rubber packing.

That is, FIG. 10 shows a typical example of a type in which adjacent wire conduits (a) made of a metal pipe are connected to each other by screwless couplings (b). Both ends of the opening of the couplings (b) are connected. A pair of rubber packings (1) preliminarily fitted to the above are closely attached to the outer peripheral surfaces of both conduits (a), and the separate rubber packings (2) interposed at the joints of both conduits (a) are It may be used by being fitted to an intermediate portion in the coupling (b).
(3) is a holding screw for each conduit (a).

Further, FIG. 11 shows a typical example of a type in which a conduit (a1) of a flexible tube is connected to a wiring box (4) by a box connector (b1). The bag nut (6) is tightened and brought into close contact with the outer peripheral surface of the conduit (a1) by the diametrical contracting force of the rubber packing (7).
(8) is a bushing, and (9) is a lock nut for the box (4).

[0005]

However, in the conduit connecting device of FIG. 10, the conduit (a) receives the pressing force of the presser screw (3) and is locally connected to the coupling (b). There is a possibility that such a gap may occur, and since the adhesion between the rubber packings (1) and (2) becomes uneven, a stable and reliable waterproofing effect cannot be achieved, resulting in poor reliability.

On the other hand, in the conduit connecting device shown in FIG. 11, a male screw (10) is engraved on the connector body (5) in order to shrink and deform the rubber packing (7) and is screwed with the male screw (10). The bag nut (6) must be prepared and tightened, which requires a large number of parts as a necessary structure for obtaining a waterproof effect, and the connecting work is very troublesome.

[0007]

DISCLOSURE OF THE INVENTION The present invention intends to improve such a problem, and for this purpose, a coupling is provided between adjacent conduits or between the conduit and its wiring box due to the structure. , Box connector, and other conduit fittings that are connected by pipe fittings, the above-mentioned connection part is surrounded by a waterproof cover made of an elastic material that can be used universally regardless of the type of conduit, wiring box, or fitting, and its waterproofing. Both ends of the opening of the cover to both outer peripheral surfaces of the adjacent electric conduits or both outer peripheral surfaces of the electric conduit and its pipe joint,
It is characterized in that it can be attached tightly to the neck.

[0008]

According to the above configuration of the present invention, the connecting portion between the conduit and the pipe joint is surrounded by the waterproof cover made of an elastic material,
In addition, both ends of the opening of the waterproof cover are bited in a neck-closed sealed state to both outer peripheral surfaces of the adjacent electric conduits or both outer peripheral surfaces of the electric conduit and its pipe joint so that the elastic pressure is exerted. Regardless of the type of conduit or pipe fitting, and while using a conventional pipe fitting that does not have waterproof performance due to rubber packing, it is possible to use a waterproof cover to universally and reliably and reliably waterproof the connecting portion. It is possible, and the work of connecting conduits can be done easily and efficiently.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The specific construction of the present invention will be described in detail below with reference to the illustrated embodiment. FIG. 1 shows a first embodiment of the present invention corresponding to FIG. A) is a pair of adjacent electric conduits made of metal pipes of the same thickness, (B) is a screwless coupling as its pipe joint, and a pair of electric conduits (A) and (A) inserted into this is Each of them is fixed by a press screw (11) so as not to come off.

(C) is a waterproof cover made of an elastic material, which is preferably made of ethylene / propylene rubber having good weather resistance, aging resistance, ozone resistance and electrical properties, and enclosing the entire coupling (B). Gain a certain length (L) and thickness (D)
Although it is molded into a basic cylindrical shape of the above, the diameter dimension (S) of both ends (12) of the opening is set so that the outer peripheral surface of the electric conduits (A) and (A) can be bitten and closely adhered. As compared with the outer diameter dimension (d) of the conduit tube (A) (A), FIG.
The relationship is set to be slightly smaller as shown in.

Moreover, the both ends (12) of the opening of the waterproof cover (C) prevent unintentional curling or curling up during use, and generate as much biting elastic force as possible on the conduits (A) (A). It is also thicker than the rest so that it can grow.

Further, in FIGS. 1 and 2, the body surface (13) surrounding the coupling (B) in the waterproof cover (C) is
By forming the bellows type or the corrugated type in a bent manner, it also has elasticity and flexibility along its own longitudinal direction, but it does not exhibit these performances. It does not matter even if it is shaped into a spindle type like that or a simple cylinder type.

In connecting the pair of the electric conduits (A) and (A) through the screwless coupling (B) as shown in FIG. 1, first, both end portions of the opening of the waterproof cover (C) are opened. By forcibly expanding (12), the waterproof cover (C) is fitted onto one of the adjacent electric conduits (A), and the coupling (B) is continued to the one electric conduit (A). The other conduit tube (A) is inserted into the coupling (B), and the pressing screw (11) is screwed to move both conduit tubes (A) and (A) into the coupling (B). Secure it in the retaining state.

After that, the waterproof cover (C) is slid from the one electric wire tube (A) to the other electric wire tube (A) so that the body cover (13) surrounds the coupling (B). Back up the other end of the opening (1
2) is forcibly fitted onto the other conduit (A). It goes without saying that the one end (12) of the opening of the waterproof cover (C) is kept fitted to the one electric conduit (A).

Then, in the use state of FIG. 1, the pair of conduits (A) (A) receives the pressing force of the presser screw (11), and the conduits (A) (A) and the coupling (B). )
Even if a provisional void is generated between the two, the opening ends (12) of the waterproof cover (C) surrounding the coupling (B) are connected to the conduit tube (A).
Regardless of the local pressing force of the presser screw (11) against (A), a stable necking and elastic pressure is constantly applied to the outer peripheral surfaces of both conduits (A) and (A) in a uniform neck-tight sealed state. As a result, a firm waterproof effect can be achieved.

Next, FIGS. 5 to 7 show the second to fourth embodiments of the present invention. In the second and third embodiments of FIGS. 5 and 6, a thin metal conduit tube (A1) and a thick metal pipe are used. Flexible tube (A2) and screwless coupling (B
1), but for such a type of conduit connecting device, the both ends (12) of the opening of the waterproof cover (C) are connected to the outer diameter dimension (d) of the thin conduit (A1). By setting the diameter (S) to be smaller than), the same waterproof effect as described above can be achieved.

In other words, the both ends (12) of the opening of the waterproof cover (C) are closed and tightly sealed to the outer peripheral surfaces of the conduits (A1) (A2) by the restoring and contracting force accompanying the forced expansion. Even if there is a change in the thickness of the pair of conduits (A1) and (A2), it can follow this without any trouble because it is designed to bite and suppress pressure, and it is also possible to obtain a uniform waterproof effect. become.

Further, in the fourth embodiment of FIG. 7, the electric wire tube (A3) of a metal pipe with a thin thread is screwed and fastened to one end of the coupling (B2) with a screw, while the other end of the coupling (B2) is also the same. An electric wire tube (A4) made of a thick flexible metal spiral tube is screwed and fastened to the portion in a peeled state of the vinyl film (14). However, even for an electric wire tube connecting device of this type, By associating the both ends (12) of the opening of the waterproof cover (C) with a diameter dimension (S) smaller than the outer diameter dimension (d) of the thin conduit tube (A3), it is possible to ensure that A stable waterproof effect can be obtained.

FIG. 8 shows a fifth embodiment of the present invention corresponding to FIG. 11 of the prior art, in which a conduit (A5) made of a flexible metal spiral tube is connected to a connector body () of a box connector (B3). 15) The retainer screw (16) is used to prevent it from coming off, and at the same time, the thin male screw cap (17) of the connector body (15) is inserted into the wiring box (18), and the lock nut is inserted from the inside of the box (18). (1
It is fastened and integrated by 9).

For such a type of conduit connecting device, one end (1) of the opening of the waterproof cover (C) is used.
2) is forcibly fitted onto the electric wire tube (A5), and the electric wire tube (A5) is connected and fixed to the connector body (15) by the holding screw (16), and then the waterproof cover (C) is used.
To surround the connector body (15) by
The other end (12) of the remaining opening is fitted into the thin male screw cap (17), and the other end (12) of the opening of the waterproof cover (C) is connected to the connector body (15) and the box (1).
8) The lock nut (1)
9) is tightened.

Then, since the connecting portion between the conduit (A5) and the box connector (B3) is surely sealed by the waterproof cover (C), the conventional structure shown in FIG.
The bag nut (6) for contracting and deforming the rubber packing (7) shown in FIG. 2 is unnecessary, and the male screw (10) to be screwed and fastened to the bag nut (6) needs to be processed in the connector body (5). The connection work is significantly simplified.

Further, FIG. 9 shows a sixth embodiment of the present invention, in which a conduit tube (A) of a flexible tube is connected via an angle connector (B4) bent in an elbow type.
6) is connected to the wiring box (18). For such a type of conduit connecting device, the waterproof cover (C) is molded into a flexible bellows type, and as shown in FIG.
By performing the same operation as in the fifth embodiment, the connecting portion between the conduit (A6) and the angle connector (B4) can be efficiently and reliably waterproofed.

As will be apparent from the above-mentioned various embodiments, the waterproof cover (C) of the present invention has conduit tubes (A) (A1).
To (A6) and their pipe joints (B) (B1) to (B4), wiring box (18), etc., the rubber conduit, the plastic, and other elastic materials that can be widely used for these, and the above conduit tube. (A) (A1) to (A6) and the pipe joints (B) (B1) to (B4) are shaped to be able to surround the connecting portion.

Since the other constructions of the second to sixth embodiments of FIGS. 5 to 9 are substantially the same as those of the first embodiment of FIGS. 1 and 2, FIGS. Only the corresponding symbols are entered, and the detailed description thereof is omitted.

[0025]

INDUSTRIAL APPLICABILITY As described above, according to the present invention, the conduits (A) (A1) to (A4) adjacent to each other or the conduit (A) are connected.
5) In the conduit connecting device for connecting the (A6) and the wiring box (18) to each other by a coupling, a box connector or other pipe joints (B) (B1) to (B4), The conduit (A) (A
1) to (A6), the wiring box (18), and the pipe joints (B) (B1) to (B4), which are surrounded by a general-purpose elastic waterproof cover (C). Both end portions (12) of the opening of (C) are the outer peripheral surfaces of the adjacent electric conduits (A) (A1) to (A4), or the electric conduits (A5) (A6) and their pipe joints (B) (B1). ~ (B
Since it is determined that both outer peripheral surfaces of 4) and 4) can be bitten in a tightly closed state, the problem of the prior art described based on FIGS. It is simple and sufficient, and has the effect of maximizing the effect of mass production.

That is, according to the above configuration of the present invention, the conduits (A) (A1) to (A6) and the pipe joints (B) (B1) to (A1).
The connecting portion with (B4) is surrounded by a waterproof cover (C) made of an elastic material, and both end portions (12) of the opening of the waterproof cover (C) are adjacent to each other in conduit tubes (A) (A1) to (A1).
4) Both outer peripheral surfaces, or both outer peripheral surfaces of the conduits (A5) (A6) and the pipe joints (B) (B1) to (B4) are bite tightly in a tightly closed state so as to exert elastic pressure. Therefore, as compared with the waterproof structure using the rubber packing (1) and (2) as shown in FIG. 10, there is no possibility of causing uneven strength in the sealing force of the waterproof cover (C), and it is always uniform and stable. A tightly closed state can be obtained with a tight necking force, and a highly reliable waterproof effect can be achieved.

As described above, the waterproof cover (C) includes the conduits (A) (A1) to (A6) and the pipe joints (B) (B) thereof.
1) to (B4), the connection part is surrounded so that even if the packing (7) is contracted and deformed as compared with the waterproof structure by the rubber packing (7) as shown in FIG. Since it is not necessary to process the bag nut (6) and the male screw (10) to be screwed and fastened to the bag nut to the connector body (5), the number of parts can be reduced and the conduit connection work can be easily performed. Yes, various pipe fittings (B)
It is remarkably excellent in versatility or compatibility with (B1) to (B4).

In particular, if the structure of claim 2 is adopted,
Due to the stretchability along the longitudinal direction of the waterproof cover (C) and the flexibility, general versatility or compatibility with various pipe joints (B) (B1) to (B4) can be further enhanced, and mass production effect can be obtained. You can make the most of it.

Further, according to the structure of claim 3, both ends (12) of the partially thickened opening of the waterproof cover (C).
However, it is possible to increase the neck-clamping pressure on the outer peripheral surfaces of the conduits (A) (A1) to (A6) and the pipe joints (B) (B1) to (B4) without the risk of curling or curling up during use. There is also an effect.

In any case, while using various simple pipe joints (B) (B1) to (B4) which do not have the waterproof performance of the conventional rubber packing (1) (2) (7), the pipe joints ( B) (B1) to (B4) and various conduits (A)
It can be said that the invention is a remarkably profitable invention in that the connection portion with (A1) to (A6) can be waterproofed in a versatile and reliable manner with stability.

[Brief description of drawings]

FIG. 1 is a sectional view showing a first embodiment of a conduit connecting device according to the present invention.

FIG. 2 is a cross-sectional view showing an extracted waterproof cover.

FIG. 3 is a cross-sectional view showing a modified embodiment of the waterproof cover.

FIG. 4 is a cross-sectional view showing another modified embodiment of the waterproof cover.

FIG. 5 is a sectional view showing a second embodiment of the present invention.

FIG. 6 is a sectional view showing a third embodiment of the present invention.

FIG. 7 is a sectional view showing a fourth embodiment of the present invention.

FIG. 8 is a sectional view showing a fifth embodiment of the present invention.

FIG. 9 is a sectional view showing a sixth embodiment of the present invention.

FIG. 10 is a cross-sectional view showing a conventional conduit connecting device.

FIG. 11 is a cross-sectional view showing another conventional conduit connecting device.

[Explanation of symbols]

 (12) · Both ends of opening (13) · Body surface (18) · Box for wiring (A) · Conduit tube (A1) · Conduit tube (A2) · Conduit tube (A3) · Conduit tube (A4) · Conduit tube (A5) -Conduit pipe (A6) -Conduit pipe (B) -Pipe joint (B1) -Pipe joint (B2) -Pipe joint (B3) -Pipe joint (B4) -Pipe joint (C) -Waterproof cover

Claims (3)

[Claims] 1. Adjacent conduits (A) (A1) to (A4)
Conduits that connect each other or between the conduits (A5) (A6) and the wiring box (18) by couplings, box connectors, and other pipe joints (B) (B1) to (B4) In the connection device, the above-mentioned connecting portion is connected to the conduits (A) (A1) to (A6), the wiring box (18), and the pipe joints (B) (B1) to (B).
Regardless of the type of 4), it is surrounded by a waterproof cover (C) made of a general-purpose elastic material, and both end portions (12) of the opening of the waterproof cover (C) are adjacent to each other in the electric conduits (A) (A1).
~ (A4) outer peripheral surface or conduit (A5) (A6)
And a pipe joint (B) (B1) to (B4) on both outer peripheral surfaces of the pipe, and a waterproof structure of a conduit connection portion, characterized in that it is bitten in a tightly closed state. 2. The waterproof cover (C) is bent and formed into a bellows type or a corrugated type so that the waterproof cover (C) is provided with flexibility and stretchability. The waterproof structure of the conduit connecting portion according to claim 1. 3. A waterproof structure for a conduit connecting portion according to claim 1, wherein both end portions (12) of the opening of the waterproof cover (C) are made thicker than the remaining portion.