JP2961713B2 - Seal connector - Google Patents

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 for connecting a hose or a tube, or connecting a cable such as a cabtire 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. On the left side of the projection 50a formed on the cylindrical nipple 50, O
A ring groove 50b is formed and the protrusion 50a
The screw 50c screwed into the lock nut 52 is provided on the left outer peripheral surface of
On the other hand, a screw 50d to be screwed to the cap nut 51 is formed on the outer peripheral surface on the opposite side. 53 is a waterproof O
It is a ring, and is a seal member that is in close contact with a cover plate such as a control box via the lock nut 52. Numeral 55 denotes a rubber seal member having elasticity, which is a cylindrical body having the same inner diameter as the nipple 50, and having a concave groove 55a formed at the center of the outer periphery. Reference numeral 56 denotes a synthetic resin taper washer which presses the seal member 55 toward the nipple 50 when the cap nut 51 is tightened. While a tapered step groove 50c is formed on the inner periphery of the right end of the nipple 50,
Similarly, a tapered step groove 56 a is formed on the inner peripheral surface at the left end of the taper washer 56, and when tightened with the cap nut 51, the seal member 55 prevents biting into each inside.

[0003] The connector having the above-described structure is provided with a lock nut 5.
2, the control box is sandwiched by a cover plate or the like (not shown) of the control box, and an O-ring 53 seals the control box.
On the other hand, the cable is a taper washer 56, a sealing member 55
After passing through the nipple 50, the cap nut 51 is tightened to form a seal. That is, the sealing member 5
In 5, the concave groove 55 a of the seal member 55 is deformed into a deeper concave shape by the pressing force of the taper washer 56, the inner diameter becomes smaller, and the seal is formed in close contact with the outer periphery of the cable.

[0004]

However, the above connector is used for cables having various outer diameters, and the tightening of the cap nut 51 is required for small-diameter (8 to 10 mm) and large-diameter (10 to 12 mm) cables. It is desirable to achieve an optimal seal with different amounts, but as a guide of the amount of tightening, tighten the end of the cap nut 51 until it comes into contact with the protrusion 50a of the nipple 50 (the distance a shown in FIG. Tighten to the zero position), simplifying the work,
Judgment of insufficient tightening is possible by appearance check.
Therefore, for example, for a cable having a small diameter (8 to 10 mm), a large diameter (10 mm) is attached to a seal connector which is trying to optimize the sealing performance by tightening the cap nut 51 to a position close to contact with the projection 50a of the nipple. ~ 12m
m), the nipple projection 50
If the cable is tightened close to contact with a, the seal member 56 may be excessively bulged in the inner diameter direction, the outer diameter of the cable may be extremely reduced, and the cable may be cut, resulting in an electrical trouble. Therefore, the present invention provides a seal connector that can simplify the tightening operation and easily determine whether or not the tightening is insufficient by external appearance check, with the tightening amounts of the cap nuts being substantially the same even for cables having different diameters. Things.

[0005]

According to a first aspect of the present invention, there is provided a seal connector comprising a tubular outer seal member having elasticity and forming a concave groove on the outer periphery between a tubular nipple and a cap nut. The inner seal member having elasticity is further inserted into the outer seal member. In this seal connector, since the seal member 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, when the outer seal member is tightened with a cap nut, the outer seal member can be sealed through deformation of the concave groove.

On the other hand, when the cable diameter 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 to the same position as above with the cap nut, the outer seal member is not sealed. The inner seal member swells in the inner diameter direction through the swelling, so that the inner seal member can be tightly sealed to the outer peripheral surface of the cable and can be sealed. In this way, even if the outer diameter of the cable is different, the fastening of the cap nut can be made the same, it is possible to prevent overtightening, and it is possible to easily determine insufficient fastening from the appearance.

In the seal connector according to the present invention, the large-diameter cable has an uneven groove formed on the inner periphery of the outer seal member, and the small-diameter cable has an uneven groove formed on the inner peripheral surface of the inner seal member. It is hard to pull out and the safety is improved by the concave and convex grooves formed. Further, in the seal connector according to the third aspect, when the cap nut is tightened by the concave and convex grooves formed on the outer peripheral surface of the inner seal member and the concave and convex grooves formed on the inner periphery of the outer seal member, the outer seal member and the inner seal member are integrated. As a result, a uniform swelling action is produced in the inner diameter direction, and the cable is tightened in a state substantially close to a perfect circle, sealing is performed, and removal is prevented. The seal connector according to claim 4.
When the left end face of the cap nut is in contact with the projection of the cylindrical nipple,
Since it can be tightened up to the barrel, the tightening amount is constant
Yes, making it easier to work and determining insufficient tightening
It is possible by appearance check.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS

(First Embodiment) In this embodiment, as shown in 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 is assembled. FIG. 3 showing a sectional view and a side view of the state.
Description will be made 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 denotes a cylindrical nipple made of metal or resin, and an O-ring groove 50b is provided on the left side of the projection 50a.
Is formed. A screw 50c screwed into the lock nut 52 is formed on the left outer peripheral surface of the projection 50a, and a screw 50d screwed into the cap nut 51 is formed on the opposite outer peripheral surface. Reference numeral 53 denotes a waterproof O-ring, which is a seal member that is in close contact with a control box or the like via the lock nut 52. 10A is an outer diameter D1 (12 mm) and an inner diameter d1 (10 m) formed of elastic rubber, resin or the like.
m), a cylindrical inner seal member having a length L1 (21 mm), having projections 10a protruding at both ends to prevent detachment of the outer seal member 5; A rectangular uneven groove 10b is formed in the inner circumferential direction for slip prevention.

Reference numeral 5 denotes a cylindrical outer seal member having an inner diameter D2 (12 mm) and a length L2 (8 mm) formed of elastic rubber, resin, or the like so that the inner seal member 10A can be inserted therein. A concave groove 5a is formed in the center of the outer peripheral surface, and a rectangular concave / convex groove 5b is formed in the inner peripheral surface on the inner peripheral surface to prevent slippage of a cable or the like. The convex portion 10a of the inner seal member 10A is
It can be easily inserted into and removed from the outer seal member 5.

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 toward the nipple 50.
A tapered step groove 50c is formed on the inner peripheral surface at the right end of the nipple 50, while the tapered washer 5 is formed.
A tapered step groove 56a is also formed on the inner peripheral surface at the left end of the outer ring 6 to prevent the outer seal member 5 from slipping into the inside when tightened with the cap nut 51. Also, the cap nut 51 is tightened with the nipple protrusion 5.
When the outer seal member 5 is tightened until it comes into contact with the outer seal member 0a, the outer seal member 5 swells in the inner diameter direction, so that the sealing performance of the cable can be sufficiently ensured.

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. FIG. 4 shows a case where the cable has a small diameter (8 to 10 mm), and the seal connector is used in a state where the inner seal member 10 </ b> A is inserted into 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. 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. As a result, the inner peripheral surface of the inner seal member 10A closely adheres to the outer peripheral surface of the cable 20 to form a seal.

That is, when the cap nut 51 is tightened until it comes into contact with the projection 50a of the nipple, the outer seal member 5 expands in the inner diameter direction, and sufficient sealing performance is ensured. Therefore, even an unskilled worker may simply tighten the cap nut 51 until the cap nut 51 comes into contact with the projection 50a of the nipple, so that overtightening can be prevented and insufficient tightening can be performed by visual inspection. Also, cable 2
0 is in close contact with the concave / convex groove 10b formed on the inner peripheral surface of the inner seal member 10A, so that even if a pulling force is applied, it will prevent removal.

FIG. 5 shows a cable having a large diameter (10 to 12 m).
m), which is different from FIG. 4 in that the inner seal member 10A is removed. The large-diameter cable 20 is connected 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 projection 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 is pressed. The inner diameter of the outer seal member 5 is swelled 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.

As described above, even for a cable having a large diameter,
The fastening of the cap nut 51 may be substantially the same as the small-diameter cable shown in FIG. That is, for a cable having a small diameter, the inner seal member 10A is attached to the outer seal member 5.
Is used. On the other hand, in the case of a large diameter, a seal connector from which the inner seal member 10A is removed is used. For this reason, even if the difference of the thickness of the inner seal member 10A occurs and the fastening of the cap nut 51 is the same, the inner diameter swelling amount of the outer seal member 5 is the same and the sealing performance can be secured. In addition, even if the concave and convex grooves 5b formed on the inner peripheral surface of the outer seal member 5 are in close contact with the outer peripheral surface of the cable 20, a tensile force is applied.
Demonstrates prevention of removal.

As described above, the sealing effect can be exerted by tightening the cap nuts 51 in the same state even for cables having different outer diameters, and even an inexperienced operator can easily overtighten and tighten. Shortage can be prevented. In the above-described embodiment, an example in which one inner seal member is inserted into the outer seal member has been described. However, by inserting an inner seal member having a plurality of inner seal members in a laminated shape, the outer seal member is inserted. It is possible to cope with various kinds of cables having different diameters. The concave and 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 the screw (spiral) groove and the circumference in addition to the above-described grooves parallel to the inner periphery. It can be formed in various shapes such as a concave and convex groove, a triangular concave and convex groove, or may be formed partially or 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. The only difference is that an uneven groove 10c that fits (screw-fits) with the uneven groove 5b formed on the inner peripheral surface of the seal member 5 is formed on the outer periphery of the inner seal member 10B. is there.
That is, as shown in FIGS. 6B and 6A, the concave and convex grooves 5b formed on the inner peripheral surface of the outer seal member 5 are specifically triangular, while being formed on the outer periphery of the inner seal member 10B. A certain concave / convex groove 10c has a triangular shape fitted into the concave / convex 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 peripheries of the inner seal member 10B have vertices a, b, c and a ', B', c 'are the same shape of formation.

[0018] The seal connector having the above-described configuration is used in a small-diameter (8 to
A cross-sectional view applied to a 10 mm) cable 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 concave and convex grooves 10c formed on the outer peripheral surface of the inner seal member 10B and the concave and convex grooves 5b formed on the inner peripheral surface of the outer seal member 5 are fitted to each other. When tightened with the cap nut 51, the concave and convex grooves 10c and 5b fitted to each other are uniformly compressed, and the outer seal member 5 and the inner seal member 1 are compressed.
OB swells evenly in the radial direction to produce a sealing effect.
Further, the cable 20 is tightened in a shape close to a perfect circle by uniform swelling of the concave and convex grooves 10b formed on the inner peripheral surface of the inner seal member 10B in the inner diameter direction, thereby ensuring sufficient sealing performance. , Even if you pull it
9b prevents removal. In other words, the outer seal member 5 and the inner seal member 10B can be integrated by forming the concave and convex grooves 10c and 5b that are fitted to each other, and the cap nut 51 comes into contact with a predetermined position (to contact the nipple protrusion 50a). By tightening up to), overtightening of the cable 20 can be prevented, and insufficient tightening can be seen from the appearance, and removal can be prevented.

[0019] In the case of using a cable of large diameter (10-12 mm), which does not use the inner seal member 10B, tightening the cable 20 in the state shown in FIG. 5
And thus that. Also, the concave and convex grooves 10c and 10b formed on the outer periphery and inner periphery of the inner seal member 10B are
(B) As shown in (b), the vertices b and c and the vertices b 'and c' can be alternately formed in the Y and Y 'cross sections. Even in this case, almost the same effect as described above is obtained. To play.

Next, FIGS. 8A, 8B and 8C show concave and convex grooves 10 formed on the outer peripheral surface of the inner seal member 10B.
FIG. 8A is a diagram showing a modified example of FIG. 8C and a side cross section of the outer seal member 5, and FIG. 8A shows an uneven groove 10 c fitted into a parallel uneven groove 5 b formed on the inner peripheral surface of the outer seal member 5. One formed on the entire outer peripheral surface of the sealing member 10B,
FIG. 8B is a diagram in which an uneven groove 10 c ′ screwed into a screw-shaped uneven groove 5 b ′ 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 10 B. (C) shows an uneven groove 10c that is fitted to the parallel uneven groove 5b formed on the inner peripheral surface of the outer seal member 5 and is formed on a part of the outer peripheral surface of the inner seal member 10B. As described above, the formation of the concave and convex grooves 10c may be partial, and further, the concave and convex grooves 5b and 10c may be formed without one-to-one correspondence. FIG. 8D shows a fitting (screwing) portion between the concave and convex groove 5b formed on the inner peripheral surface of the outer seal member 5 and the concave and convex 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), and 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 be integrated with the outer seal member 5 and the inner seal member 10B by tightening the cap nut 51. It is clear that the shape is not limited.

[0021]

The seal connector of the present invention uses an inner seal member for a small-diameter cable, and uses an outer seal member for a large-diameter cable.
In both cases, the fastening of the cap nut can be made the same, so that even an inexperienced person can work, and it is possible to prevent insufficient fastening and overtightening. Also, by the uneven groove formed on the inner peripheral surface of the inner seal member and the outer seal member,
The disconnection of the cable can be prevented, the safety surface can be improved, and the uneven sealing groove can be formed on the outer peripheral surface of the inner seal member to achieve uniform tightening. Also, hit the cap nut to the projection of the cylindrical nipple.
Can be tightened until the tightening amount is constant.
To make the work simpler and to judge insufficient tightening.
It is possible by the appearance check.

[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 diagram showing a cross section of an inner seal member and an outer seal member of the first embodiment.

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

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

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

FIG. 6 is a view showing components constituting a seal connector according to a second embodiment.

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

FIG. 8 is a side sectional view showing a modification 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]

Reference Signs List 5 outer seal member 5a concave groove 5b concave and convex groove 10A, 10B inner seal member 10b, 10c concave and convex groove 50 nipple 51 cap nut 51a nipple protrusion 52 lock nut 53 O-ring 56 taper washer

Claims (4)

(57) [Claims] 1. A seal connector, such as a cable, comprising a tubular outer seal member having elasticity and having a concave groove formed on an outer periphery thereof, which is sandwiched between a tubular nipple and a cap nut. A seal connector, wherein an elastic cylindrical inner seal member is fitted into an outer seal member. 2. The seal connector according to claim 1, wherein an uneven groove is formed on an inner peripheral surface of the outer seal member and the inner seal member. 3. The seal connector according to claim 1 , wherein an uneven groove is formed on an outer peripheral surface of the inner seal member. The left end surface of the cap nut has a cylindrical nipple projection.
That can be tightened until it hits the
The seal connector according to claim 1, 2, or 3.