JP2002349767A - Seal connector of cable - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a connector for preventing looseness of a box nut in the seal connector of a cable. SOLUTION: In this seal connector of the cable, a projecting body 1e is formed on the right side outer periphery of a rotary head part 1a of a nipple 1, and a fitting recess-projection 10c fittable to the projecting body 1e is formed on an inner peripheral surface of the box nut 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cable seal connector used for preventing leakage (sealing) when a cable is inserted into an insertion hole formed in equipment.

[0002]

2. Description of the Related Art Referring to FIG. 4 showing a cross section of a conventional cable seal connector, a cable seal connector 100 includes a nipple 111, a seal member 112, a taper ring 115, and a cap nut 110. The cable 101 covered with a synthetic resin or the like is connected. The nipple 111 has a rotating head 111a for a spanner.
A device screw 111b for mounting a device is formed on the left side, and a nut screw 111c for a cap nut is formed on the outer surface on one right side. On the inner surface on the right side, an inclined pressed portion 111d sandwiching the seal member 112 is formed. An O-ring 114 for sealing is mounted on the left side of the rotating head 111a. When the O-ring 114 is fixed to a side plate of the device via a nut (not shown), a seal (leakage prevention) is provided.
Works.

The sealing member 112 is an elastic body made of a synthetic resin, rubber, or the like in a cylindrical shape, and an inner surface 112a of the sealing member 112 is formed flat so as to be fittable to an outer surface of the cable 101. On the flat outer surface of the seal member 112, one concave portion 112b is formed in an annular shape. A taper ring 115 is attached to the cable 101 on the right side of the seal member 112. On the right outer surface of the tapered ring 115, there is formed a step 115a for engaging with the cap nut 110, and on the left inner surface, an inclined pressed portion 1 for pressing the seal member 112 in the inner circumferential direction.
15b are formed. A nut screw 11 formed on the nipple 111 is provided on the left inner surface of the cap nut 110.
1c is formed with an inner screw 110a to be screwed,
On the right side, a convex portion 110b that can be locked to a step 115a formed on the tapered ring 115 is formed in an annular shape.

A cable 101 made of synthetic resin or the like is
When the cap nut 110 is tightened, as shown in FIG. 4B, the concave portion 112b formed on the outer periphery of the seal member 112 is crushed with the movement of the taper ring 115, and swells in the inner diameter direction, so that the cable 101 And tightly sealed. Further, when the cap nut 110 is further tightened, the seal member 112 further bulges in the inner diameter direction and enters the cable 101 as shown in FIG.

[0005]

Since the seal connector 100 having the above-described structure is configured to be compatible with the cable 101 having a wide range of outer diameter, the tightening range of the cap nut 110 is large, and FIG. As shown, cable 101
Overtightening occurs. As a result, the cable 10
There is a problem that the coating of No. 1 is broken or the built-in conductor is broken. Therefore, as a countermeasure, the cap nut 110
It is conceivable that the adjustment is made by adjusting the tightening amount of the cable 101, but it is difficult to adjust the cable according to the cables 101 having various outer diameters. For example, as shown in FIG.
If the 0 is loosely tightened, there arises a problem that the cap nut 110 is loosened.

Also, the inner surface 112 of the conventional sealing member 112
a is formed flat. Therefore, when the cap nut 110 is tightened, the seal member 112 is inserted between the nipple 111 and the cable 101, and the sealing member 112 may not be able to exhibit sealing performance. Therefore, the present invention provides a seal connector that solves such a disadvantage.

[0007]

According to a first aspect of the present invention, there is provided a seal connector in which a cable is inserted through a nipple, a sealing member, and a loose ring, and is tightened with a cap nut. By forming the body 1e and forming the fitting unevenness 10c that can be fitted to the protrusion 1e on the inner surface of the cap nut 10, loosening of the cap nut can be prevented. According to a second aspect of the present invention, the nipple, the sealing member, and the loose ring are inserted through the cable and fastened with a cap nut. The sealing member 2 is cylindrical, and has a concave portion 2b formed in the center of the outer surface thereof. In addition, since the convex portions 2c and 2c are formed on both sides of the concave portion 2b, when tightened with the cap nut, the seal member bulges into the cable at three places and closely adheres to the cable. It is possible to prevent the cable 101 from coming off and to improve the sealing performance.

According to the third aspect of the present invention, since the uneven portion 11 is formed on the inner surface of the seal member, the cap nut 10 is formed.
When the seal member 2 </ b> A is fitted to the cable 101, the concave and convex portions 11 are in close contact with the outer diameter portion of the cable 101 with irregularities, so that the tensile force of the cable 101 in the axial direction increases. Further, in the seal connector according to the fourth aspect, since the slits 13 are formed in the axial direction from the end portions of the seal members 2C and 2D, the slits 13 can easily swell and adhere to the cable 101. In the seal connector according to the fifth aspect, a protrusion 12 is formed at an end of the seal member.
2, the effect of the protrusion 12 pressing the outer surface of the cable 101 in the inner diameter direction is increased by the sealing member 2B tightening the cap nut 10, and the sealing performance can be improved.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A cable seal connector 20 according to the present embodiment comprises a nipple 1, a seal member 2, a loose ring 5, and a cap nut 10. These components will be described with reference to the drawings. . 1A is a cross-sectional view and a front view showing a state where the cable 101 is inserted into the seal connector 20, and FIG. 1B is a cross-sectional view and a front view showing a state where the cable 101 is fastened by the seal connector 20.
FIG. 2 (A-1) is a front view of the nipple 1 and FIG.
2) is a side view of the nipple 1, FIG. 2 (B-1) is a side view of the cap nut 10, and FIG. 2 (B-2) is a front view and a sectional view of the cap nut 10. FIG. 3 shows seal members 2 to 2 of various shapes.
FIG.

A rotating head 1a for a spanner is formed substantially at the center of a cylindrical nipple 1 made of synthetic resin, metal, or the like. While the device screw 1b is formed, a nut screw 1c for a cap nut is formed on the outer surface on the right side. On the outer periphery on the right side of the rotating head 1a, four mountain-shaped protrusions 1e for preventing loosening of the cap nut 10 described later are formed at four places. It can be fitted. A tapered pressing portion 1d is formed on the right inner periphery of the rotating head 1a, so that a sealing member 2 described later can be inserted therein. An O-ring 14 for sealing is mounted on the left side of the rotating head 1a. When the O-ring 14 is fixed to a side plate (not shown) of the device via a nut (not shown), a sealing (leakage prevention) action is provided. I do.

The seal member 2 is an elastic body made of a synthetic resin, rubber, or the like in a cylindrical shape. As shown in FIG. 3A, the seal member 2 has an inner diameter through which the cable 101 can be inserted, and has an inner surface 2a. Is formed flat, while a single concave portion 2b is formed in the center of the outer surface of the seal member 2, and convex portions 2c, 2c are formed annularly on both sides of the concave portion 2b. The convex portion 2c is formed so as to protrude from the outer surface of the seal member 2, and the concave portion 2b is formed to have substantially the same diameter as the outer surface of the seal member 2. In addition, the shapes of the protrusions 2c, 2c can be appropriately selected and need not necessarily be the same.

On the right side of the sealing member 2, a cable 1
A loose ring 5 having an inner diameter through which the nut 01 can be inserted is mounted. On the right outer surface of the loose ring 5, there is formed a concave groove 5a which can lock a convex portion 10b formed on a cap nut 10 described later. At the same time, a tapered pressing portion 5b for pressing the seal member 2 in the inner diameter direction is formed on the left inner surface.

[0013] A cap nut 1 made of synthetic resin, metal or the like.
0 has an inner screw 10a which is screwed into a nut screw 1c formed on the nipple 1 and a convex portion 10b which can be engaged with a concave groove 5a formed on the loose ring 5 on the right side. Is formed in an annular shape. Therefore, the loose ring 5 is configured to move integrally with the cap nut 10. On the inner periphery on the left side of the cap nut 10, a serrated fitting unevenness 10c is formed in an annular shape to be fitted on the outer periphery of the projection 1e formed on the nipple 1.

The protrusion 1e may be formed on the cap nut 10 and the fitting unevenness 10c may be formed on the nipple 1, or the shape of the protrusion 1e and the fitting unevenness 10c may be other shapes. That is, any shape may be used as long as it is fitted to prevent the cap nut 10 from being loosened. In addition, at least one of the materials of the protrusion 1e (nipple 1) and the fitting unevenness 10c (cap nut 10) is made of an elastic synthetic resin so as to be able to be fitted.

Next, the use of the seal connector 20 having the above configuration will be described. The cable 101 such as a synthetic resin is
When the cap nut 10 is tightened, as shown in FIG. 1 (B), the outer circumferential end faces of the seal member 2 are loosened with the tapered pressing portion 1 d formed on the inner face of the nipple 1 as the loose ring 5 moves. Due to the tapered pressing portion 5b formed on the ring 5, the cable 101
Adhere to Further, when the cap nut 10 is tightened and the loose ring 5 is moved, the concave portion 2b formed on the outer periphery of the seal member 2 is crushed, and the central portion 2g and both end portions 2h corresponding to the concave portion 2b bulge in the inner diameter direction. And tightly bonded to the cable 101 for sealing (leakage prevention). That is, a concave portion 2b formed on the outer surface of the seal member 2 and convex portions 2 formed on both sides thereof.
Even if the seal member 2 is crushed by c, when the inner surface of the seal member 2
Since they are dispersed at the locations and swell in the radial direction and are tightly joined, there is little biting into the cable 101, and since they are pressed at three locations, the cable 101 can be prevented from coming off and the sealing performance can be improved. .

The inner screw 10 formed on the cap nut 10
When the number of threads of a is tightened until the cap nut 10 contacts the nipple 1, the cable 1
01 is selected so that it can be tightly connected to the cap nut 10.
Overtightening can be prevented, and the amount of tightening can be easily controlled. In addition, the fitting unevenness 10c is fitted to the outer periphery of the protrusion 1e, thereby preventing the cap nut 10 from rotating and preventing loosening.

Next, in place of the seal member 2 (FIG. 3A), usable seal members 2A to 2D are shown in FIG.
This will be described with reference to (B) to (E). The seal member 2A shown in FIG. 3B differs from the seal member 2 in which the inner surface 2a is flat, and has an uneven portion 11 formed on the inner surface. The unevenness 11 formed on the inner surface of the sealing member 2A is reduced in its entirety in the inner diameter direction when tightened with the cap nut 10, so that the cable 1
01. At this time, the coating (outer surface) of the cable 101 is closely contacted with irregularities, so that the tensile force in the axial direction of the cable 101 can be increased, and disconnection can be prevented.

The seal member 2B shown in FIG. 3C is different from the seal member 2 in that projections 12 are formed at both ends.
When the cap nut 10 is tightened, the projection 12
1, the effect of pressing the outer surface in the inner diameter direction is increased, and the sealing performance can be improved.

The seal member 2C shown in FIG.
The protrusions 2c, 2c in the axial direction from both ends of the seal member 2C.
3C, a substantially rectangular slit 13 is formed. The seal member 2D shown in FIG.
A triangular slit 13a is formed from both ends of D to the protrusions 2c and 2c in the axial direction. These seal members 2C and 2D can be easily swelled and adhered to the cable 101 by the slits 13 and 13a, and the sealing performance can be improved. The slits 13 and 13a do not need to be formed up to the protrusions 2c and 2c, but may be formed halfway, or may be formed only on one side of the protrusion 2c. Slit 13,
The number and shape of 13a can be appropriately selected.

Incidentally, the seal connector of the present invention is not limited to the shapes of the nipple, the seal member, the cap nut, and the loose ring described above.
It goes without saying that the nipple, the sealing member, the cap nut, and the partial shape (structure) of the loose ring are appropriately combined depending on the purpose of use.

[0021]

According to the first aspect of the present invention, there is provided a seal connector comprising: a protrusion 1e formed on the outer periphery on the right side of a rotating head of a nipple;
The loosening of the cap nut can be prevented by fitting the fitting unevenness 10c formed on the inner surface of the zero. Claim 2
Is formed by a concave portion 2b formed at the center of the outer surface of the seal member and convex portions 2c and 2c formed on both sides thereof.
When tightened with the cap nut, the sealing member bulges into the cable at three places and closely adheres to the cable, so that the cable does not bite into the cable 101, preventing the cable 101 from being pulled out and improving the sealing performance. In the seal connector according to the third aspect, the uneven portion 11 is formed on the inner surface of the seal member. Therefore, when the seal member 2A is fitted to the cable 101, the uneven portion 11 is
1 is tightly adhered to the outer diameter portion with irregularities.
(1) The tensile force in the axial direction is increased, so that the removal can be prevented. Further, in the seal connector according to the fourth aspect, since the slits 13 and 13a are formed in the axial direction from the end portions of the seal members 2C and 2D, the slits 13 and 13a can easily swell and adhere to the cable 101. The seal connector of claim 5 is
A projection 12 is formed at the end of the sealing member, and the projection 12 increases the effect of the sealing member 2B pressing the outer surface of the cable 101 in the inner diameter direction by tightening the cap nut 10. Thus, the sealing performance can be improved.

[Brief description of the drawings]

1A is a cross-sectional view and a front view of a state where a cable is inserted into a seal connector, and FIG. 1B is a cross-sectional view and a front view of a state where the cable is fastened by a seal connector.

FIG. 2A is a front view of a nipple, and FIG.
2B is a side view of the nipple, FIG. 2B-1 is a side view of the cap nut, and FIG. 2B-2 is a front view and a cross-sectional view of the cap nut.

FIG. 3 is a view showing various shapes of seal members.

FIG. 4 is a front cross-sectional view showing a state of connection by a conventional seal connector.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Nipple 1a Rotating head 1e Protruding body 2, 2A-2D Sealing member 2b Concave part 2c Convex part 10 Cap nut 10c Fitting irregularity 11 Irregularity part 12 Protrusion 13, 13a Slit 20 Seal connector 101 Cable

Claims (5)

[Claims] 1. A seal connector for a cable in which a cable is inserted into a nipple, a sealing member and a loose ring, and tightened with a cap nut, wherein a projecting body 1e is formed on a right outer periphery of a rotating head of the nipple. The fitting unevenness 10c that can be fitted to the projection 1e is
A seal connector for a cable, which is formed on an inner surface of a cable. 2. A seal connector for a cable, in which a cable is inserted into a nipple, a sealing member and a loose ring, and tightened with a cap nut, wherein the sealing member is cylindrical, and a concave portion 2b is formed in a central portion of an outer surface thereof. The protrusions 2 are provided on both sides of the recess 2b.
A seal connector for a cable, wherein c and 2c are formed. 3. The seal connector for a cable according to claim 2, wherein an uneven portion 11 is formed on an inner surface of the seal member. 4. The cable seal connector according to claim 2, wherein a slit is formed in an axial direction from an end of the seal member. 5. The seal connector for a cable according to claim 2, wherein a protrusion is formed at an end of the seal member.