JPH09119569A - Seal connector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a seal connector from being damaged by local cable tightening force. SOLUTION: A seal connector is formed by inserting a cylindrical outer seal member 5 which is elastic and has a recessed groove around its outer periphery between a cylindrical nipple 50 and a cap nut 51. Also it is formed by fitting a cylindrical elastic inner seal member 10A closely into the outer seal member 5. Therefore, depending on the cable diameter, a local tightening is prevented by enabling sealing under the condition where the inner seal member 10A is not used.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seal connector used when connecting a hose or a tube or connecting a cable such as a captyre cable or a multi-core cable to a control box or an electric device.

[0002]

2. Description of the Related Art A conventional seal connector will be described with reference to FIGS. 9A and 9B showing a side cross section and a right side surface. On the left side of the protrusion 50a formed on the cylindrical nipple 50, O
A ring groove 50b is formed and the protrusion 50a is formed.
50c screwed to the lock nut 52 on the left outer peripheral surface of
However, on the other hand, on the outer peripheral surface on the opposite side, screws 50d that are screwed into the cap nuts 51 are formed, respectively. In addition, 53 is a waterproof O
It is a ring and is a seal member that comes into close contact with a cover plate such as a control box via a lock nut 52. Reference numeral 55 denotes a rubber seal member having elasticity, which is a cylindrical body having the same inner diameter as that of the nipple 50, and a concave groove 55a is formed at the center of the outer periphery. A synthetic resin taper washer 56 presses the seal member 55 toward the nipple 50 when the cap nut 51 is tightened. Incidentally, a tapered step groove 50c is formed on the inner periphery of the right end portion of the nipple 50,
Similarly, a tapered step groove 56a is formed on the inner peripheral surface of the left end portion of the taper washer 56, and when the cap nut 51 is tightened, the seal member 55 prevents the bite from entering the inside.

The connector having the above-described structure is a lock nut 5
It is sandwiched by a cover plate or the like (not shown) of the control box via 2 and the O-ring 53 forms a seal with the control box.
On the other hand, the cable has a taper washer 56 and a seal member 55.
After passing through the nipple 50 and the nipple 50, the cap nut 51 is tightened to form a seal. That is, the seal member 5
In No. 5, the concave groove 55a of the seal member 55 is deformed into a deeper concave groove by the pressing force of the taper washer 56, so that the inner diameter becomes smaller, and the inner groove is closely adhered to the outer circumference of the cable to form a seal.

[0004]

However, the connector is used for cables having various outer diameters and the like, and for a cable having a small diameter (8 to 10 mm) and a large diameter (10 to 12 mm), the cap nut 51 is tightened. It is desirable to achieve the optimum seal by varying the amount, but as a guide for the tightening amount, tighten the end portion of the cap nut 51 until it contacts the protrusion 50a of the nipple 50 (the distance a shown in FIG. (Tighten to the zero position) to make the work easier and
The appearance can be checked to determine if tightening is insufficient.
Therefore, for example, for a cable having a small diameter (8 to 10 mm), a large diameter (10 mm) is used for a seal connector that is optimized for sealing performance by tightening the cap nut 51 until the cap nut 51 abuts the protrusion 50a of the nipple. ~ 12m
For the cable of m), similarly, the nipple protrusion 50
If the seal member 56 is tightened close to a point of contact with a, the seal member 56 may bulge too much in the inner diameter direction, and the outer diameter of the cable may be extremely reduced, resulting in cutting and electrical trouble. Therefore, the present invention provides a seal connector in which the tightening amount of the cap nut is made substantially the same even for cables having different diameters, and the tightening work is easy and whether or not the tightening is insufficient can be easily judged by an external appearance check. It is a thing.

[0005]

According to a first aspect of the seal connector of the present invention, a cylindrical outer seal member having elasticity and forming a groove on the outer circumference is sandwiched between a cylindrical nipple and a cap nut. In addition, a cylindrical inner seal member having elasticity is fitted and inserted into the outer seal member. Since the seal member of this seal connector is composed of the outer seal member and the inner seal member, when the outer diameter of the cable is larger than the inner diameter of the inner seal member, the inner seal member is removed and the cable is inserted into the outer seal member. After that, by tightening with a cap nut, it is possible to seal through deformation of the concave groove of the outer seal member.

On the other hand, when the diameter of the cable is smaller than the inner diameter of the inner seal member, after inserting the cable into the inner seal member fitted in the outer seal member and tightening it with the cap nut to the same position as described above, the outer seal member will be damaged. Due to the bulging of the inner seal member in the inner diameter direction through the bulge, the inner seal member can closely contact and seal the outer peripheral surface of the cable. As described above, even if the outer diameters of the cables are different, the cap nuts can be tightened in the same manner, overtightening can be prevented, and insufficient tightening can be easily determined from the appearance.

The seal connector according to the second aspect of the present invention has a concave-convex groove formed on the inner circumference of the outer seal member for a large-diameter cable so that the inner circumference surface of the inner seal member can be used for a small-diameter cable. Due to the uneven groove formed, it is difficult to pull out and the safety is improved. Further, in the seal connector of claim 3, when the cap nut is tightened by the uneven groove formed on the outer peripheral surface of the inner seal member and the uneven groove formed on the inner circumference of the outer seal member, the outer seal member and the inner seal member are integrated. As a result, a uniform bulging action is generated in the inner diameter direction, and the cable is tightened in a state of being close to a perfect circle to seal and prevent disconnection.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS

(First Embodiment) In this embodiment, FIG. 1 showing components of a seal connector, FIGS. 2A and 2B showing cross sections of an inner seal member and an outer seal member, and a seal connector were assembled. FIG. 3 showing a sectional view and a side view of the state.
This will be described with reference to (A) and (B). Note that components having the same functions as those in the related art are denoted by the same reference numerals.

Reference numeral 50 is a cylindrical nipple made of metal or resin, and an O-ring groove 50b is provided on the left side of the protrusion 50a.
Is formed. Further, a screw 50c screwed into the lock nut 52 is formed on the left outer peripheral surface of the protrusion 50a, and a screw 50d screwed into the cap nut 51 is formed on the opposite outer peripheral surface. Reference numeral 53 is a waterproof O-ring, which is a seal member that comes into close contact with the control box or the like via the lock nut 52. 10A is made of elastic rubber or resin, and has an outer diameter D1 (12 mm) and an inner diameter d1 (10 m
m), a cylindrical inner seal member having a length L1 (21 mm), projections 10a for preventing separation of the outer seal member 5 are provided at both ends, and further, an inner peripheral surface is provided with a cable or the like. A rectangular concave-convex groove 10b is formed in the inner peripheral direction for slip prevention.

On the other hand, numeral 5 is a cylindrical outer seal member having an inner diameter D2 (12 mm) and a length L2 (8 mm), which is made of elastic rubber, resin or the like, into which the inner seal member 10A can be inserted. Thus, a concave groove 5a is formed in the center of the outer peripheral surface, and further, a rectangular concave-convex groove 5b is formed in the inner peripheral surface in the inner peripheral direction for preventing slippage of a cable or the like. The convex portion 10a of the inner seal member 10A is elastically
The outer seal member 5 can be easily inserted and removed.

Reference numeral 56 denotes a taper washer made of synthetic resin or metal, which is moved by tightening the cap nut 51,
The outer seal member 5 is pressed against the nipple 50 side.
A tapered step groove 50c is formed on the inner peripheral surface of the right end portion of the nipple 50, while the tapered washer 5 is formed.
A tapered step groove 56a is also formed on the inner peripheral surface of the left end portion of 6 to prevent the outer seal member 5 from slipping inward when tightened with the cap nut 51. In addition, the cap nut 51 is tightened by the protrusion 5 of the nipple.
When the outer seal member 5 is swelled in the inner diameter direction when it is tightened until it comes into contact with 0a, sufficient sealing performance of the cable can be secured.

Next, a method of attaching cables having different diameters to the seal connector attached to the cover plate of the control box will be described with reference to FIGS. 4 and 5. FIG. 4 shows a case where the cable has a small diameter (8 to 10 mm), and the seal connector is used with the inner seal member 10A fitted and inserted in the outer seal member 5. First, when the lock nut 52 is attached to the cover plate 15 of the control box,
The O-ring 53 seals the cover plate 15. Then, when the small-diameter cable 20 is inserted through the inner seal member 10A and the nipple 50 and the cap nut 51 is tightened, the taper washer 56 presses the outer seal member 5, and the inner diameter of the outer seal member 5 is the width of the concave groove 5a. The inner peripheral surface of the inner seal member 10A comes into close contact with the outer peripheral surface of the cable 20 to form a seal due to the expansion of the inner seal member 10A.

That is, when the cap nut 51 is tightened until it comes into contact with the protrusion 50a of the nipple, the outer seal member 5 bulges in the inner diameter direction and sufficient sealing performance is secured. Therefore, even an inexperienced worker can simply tighten the cap nut 51 until it comes into contact with the protrusion 50a of the nipple, which can prevent overtightening and allow visual inspection for insufficient tightening. Also, cable 2
Since 0 comes into close contact with the concave and convex groove 10b formed on the inner peripheral surface of the inner seal member 10A, even if a pulling force is applied, removal is prevented.

In FIG. 5, the cable has a large diameter (10 to 12 m).
In the case of m), the inner seal member 10A is removed, which is different from FIG. Connect the large-diameter cable 20 to the taper washer 56, the outer seal member 5,
When the nipple 50 is inserted and the cap nut 51 is tightened until it comes into contact with the protrusion 50a of the nipple, as in the case of the small-diameter cable, the taper washer 56 presses the outer seal member 5 and the outer seal member 5 The inner diameter of the bulge bulges in the inner diameter direction by the concave groove 5a, and the inner peripheral surface of the outer seal member 5 is brought into close contact with the outer peripheral surface of the cable to form a seal.

In this way, even for large diameter cables,
The tightening of the cap nut 51 may be substantially the same as that of the small diameter cable shown in FIG. That is, for a cable having a small diameter, the outer seal member 5 has the inner seal member 10A.
Is used, and in the case of a large diameter, the seal connector with the inner seal member 10A removed is used. Therefore, even if the inner seal member 10A has a difference in thickness and the cap nut 51 is tightened in the same manner, the outer seal member 5 has the same inner diameter bulging amount, and the sealing performance can be secured. Further, the uneven groove 5b formed on the inner peripheral surface of the outer seal member 5 is in close contact with the outer peripheral surface of the cable 20, and even if a tensile force is applied,
Demonstrates removal prevention.

As described above, even with cables having different outer diameters, if the cap nut 51 is tightened in the same state, a sealing effect can be exhibited, and even an inexperienced worker can easily overtighten and tighten. The shortage can be prevented. In addition, in the above-mentioned embodiment, an example in which one inner seal member is inserted into the outer seal member is given, but by inserting and inserting the inner seal member having a plurality of inner seal members in a laminated shape, It is possible to support various types of cables with different diameters. Further, the concave-convex grooves 10b and 5b formed on the inner peripheral surfaces of the inner seal member 10A and the outer seal member 5 are independent of screw (spiral) grooves and circles, in addition to the grooves parallel to the inner circumference described above. The groove may be formed in various shapes such as a groove having concaves and convexes, a groove having a triangular concave and convex shape, or may be formed partially in addition to the entire inner peripheral surface.

(Second Embodiment) As shown in FIGS. 6 to 8, this embodiment is an improvement of the first embodiment and is different from the first embodiment in the outer. The remaining structure is the same except that an uneven groove 10c that fits (screws) into an uneven groove 5b formed on the inner peripheral surface of the seal member 5 is formed on the outer circumference of the inner seal member 10B. is there.
That is, as shown in FIG. 6B and FIG. 6A, the concave and convex groove 5b formed on the inner peripheral surface of the outer seal member 5 has a concrete triangular shape, while it is formed on the outer periphery of the inner seal member 10B. The uneven groove 10c has a triangular shape that fits into the uneven groove 5b. The concave and convex grooves 5b formed on the outer seal member 5 and the concave and convex grooves 10c and 10b formed on the outer and inner circumferences of the inner seal member 10B are apex a, b, c and apex a in the Y, Y'section. It has the same shape forming ', b', and c '.

The seal connector having the above-mentioned structure is provided with a small diameter (8 to
A cross-sectional view applied to a cable of 10 mm) is shown in FIG. 7A showing a state before tightening and FIG. 7B showing a state after tightening. As is clear from FIGS. 7A and 7B, the uneven groove 10c formed on the outer peripheral surface of the inner seal member 10B and the uneven groove 5b formed on the inner peripheral surface of the outer seal member 5 are in a fitted state with each other. When tightened with the cap nut 51, the concave and convex grooves 10c and 5b that fit with each other are uniformly compressed, and the outer seal member 5 and the inner seal member 1
0B swells uniformly in the inner diameter direction to produce a sealing effect.
Further, the cable 20 is tightened in a shape close to a perfect circle by the uniform bulging in the inner diameter direction of the concave-convex groove 10b formed on the inner peripheral surface of the inner seal member 10B, and sufficient sealing performance is ensured. , Even if pulled, its uneven groove 1
9b prevents withdrawal. That is, the outer seal member 5 and the inner seal member 10B can be integrated by forming the concavo-convex grooves 10c and 5b which are fitted to each other, and the cap nut 51 abuts at a predetermined position (abutting on the protrusion 50a of the nipple). It is possible to prevent the cable 20 from being over-tightened and to check the appearance of the under-tightening by preventing the cable 20 from being pulled out.

When used for a cable having a large diameter (10 to 12 mm), the inner seal member 10B is not used, so the cable 20 is tightened in the state shown in FIG. Further, the concave and convex grooves 10c and 10b formed on the outer circumference and the inner circumference of the inner seal member 10B are not shown in FIG.
As shown in (B) and (B), the vertices b and c and the vertices b ′ and c ′ can be formed alternately in the Y, Y ′ cross section, and in this case, the same effect as described above can be obtained. Play.

Next, FIGS. 8A, 8B and 8C show the concave and convex groove 10 formed on the outer peripheral surface of the inner seal member 10B.
FIG. 8A is a view showing a modified example of c and a side cross section of the outer seal member 5, and FIG. 8A shows an inner side of an uneven groove 10 c fitted to a parallel uneven groove 5 b formed on the inner peripheral surface of the outer seal member 5. The one formed on the entire outer peripheral surface of the seal member 10B,
FIG. 8 (B) shows an inner seal member 10B in which an uneven groove 10c ′ screwed into a screw-like uneven groove 5b ′ formed on the inner peripheral surface of the outer seal member 5 is formed on the entire outer peripheral surface of the inner seal member 10B. In (C), a concave-convex groove 10c that fits into the parallel concave-convex groove 5b formed on the inner peripheral surface of the outer seal member 5 is formed on a part of the outer peripheral surface of the inner seal member 10B. In this way, the concave and convex grooves 10c may be formed partially, or further, the concave and convex grooves 5b and 10c may not be formed in a one-to-one correspondence. Further, FIG. 8D shows a fitting (screw) portion of the uneven groove 5b formed on the inner peripheral surface of the outer seal member 5 and the uneven groove 10c formed on the outer peripheral surface of the inner seal member 10B. The shapes of 5b and 10c may be trapezoidal, rectangular, triangular (not shown) or the like. As described above, the uneven groove 5b formed on the outer seal member 5 and the uneven groove 10c formed on the inner seal member 10B can integrate the outer seal member 5 and the inner seal member 10B by tightening the cap nut 51. It suffices to form it so that it can be formed in any shape.

[0021]

The seal connector of the present invention uses an inner seal member for a small diameter cable and an outer seal member for a large diameter cable.
Since the cap nuts can be tightened in the same manner in both cases, even an inexperienced person can work, and it is possible to prevent insufficient tightening and excessive tightening. Also, due to the uneven groove formed on the inner peripheral surface of the inner seal member and the outer seal member,
The removal of the cable can be prevented, the safety can be improved, and the concavo-convex groove is formed on the outer peripheral surface of the inner seal member, so that uniform tightening can be achieved.

[Brief description of the drawings]

FIG. 1 is a diagram showing components of a seal connector according to a first embodiment.

FIG. 2 is a view showing a cross section of an inner seal member and an outer seal member of the first embodiment.

FIG. 3 is a view showing a cross section and a side surface of the seal connector of the first embodiment.

FIG. 4 is a sectional view of the seal connector according to the first embodiment applied to a cable having a small diameter.

FIG. 5 is a sectional view of the seal connector of the first embodiment applied to a large diameter cable.

FIG. 6 is a view showing parts constituting the seal connector of the second embodiment.

FIG. 7 is a cross-sectional view of the seal connector of the second embodiment applied to a small-diameter cable, showing the seal connector before and after tightening.

FIG. 8 is a side sectional view showing a modified example of the inner seal member and the outer seal member of the second embodiment.

FIG. 9 is a sectional view and a right side view of a conventional seal connector.

[Explanation of symbols]

 5 Outer seal member 5a Recessed groove 5b Uneven groove 10A, 10B Inner seal member 10b, 10c Uneven groove 50 Nipple 51 Cap nut 52 Lock nut 53 O-ring 56 Taper washer

Claims (3)

[Claims] 1. A seal connector for a cable or the like, comprising a cylindrical outer seal member having elasticity and having a groove formed on the outer periphery thereof, sandwiched between a cylindrical nipple and a cap nut, the seal connector comprising: A seal connector, wherein a cylindrical inner seal member having elasticity is fitted and inserted into an outer seal member. 2. The seal connector according to claim 1, wherein concave and convex grooves are formed on the inner peripheral surfaces of the outer seal member and the inner seal member. 3. The seal connector according to claim 2, wherein an uneven groove is formed on the outer peripheral surface of the inner seal member.