KR960014125B1 - Cable sleeve - Google Patents

Abstract

The apparatus is designed to seal a cable sleeve. The apparatus includes : a pair of inlet (11A, 11B) for connecting a cable (Ca); an end cap (10) having a sealing space (13); threads (11, 12, 22); a screw plug (20) forming a hollow section (23) to insert the cable (Ca); and the first and the second cable washers (30, 31).

Description

Cable entry and exit sealing device of optical cable junction box

1 is a perspective view showing the cable entry portion sealing device of the optical cable junction box according to the present invention.

2 is a perspective view showing a cable entry part sealing device of an optical cable junction box according to the present invention.

3 is a cross-sectional view showing a sealing process in the cable entry portion sealing device according to the present invention.

4 is a cross-sectional view showing a state of completion of sealing in the cable entry portion sealing device according to the present invention.

5 is a schematic view showing the thread of the end cap and the screw plug in the cable entry sealing device according to the present invention.

(A)-(c) is a perspective view which shows the Example of the airtight holding means in the cable entry part sealing apparatus which concerns on this invention.

7 is a perspective view showing an embodiment of the caulking means in the cable entry and closing device according to the present invention.

(A) (b) of FIG. 8 is a perspective view and sectional drawing which showed the example of application of FIG.

* Explanation of symbols for main parts of the drawings

10: end cap 12: screw thread (of end cap)

13: sealing space (of end cap) 20: screw plug

22: Screw thread (of screw plug) 23: Hollow part (of screw plug)

25 Checking ring 30, 31 First and second cable washers

40: sealing cord 50: gasket

51: bellow gasket 52: ring seal

60: cocking screw 65: cocking plug

Ca: cable

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical cable connection box, and more particularly, to an apparatus for sealing a cable entry part of an optical cable connection box for sealing a cable entry part of a cable. .

In conventional optical cable junction boxes, the cable entry and exit are usually wrapped around the cable's outer sheath with a large adhesive tape, and a pair of end caps vertically separated thereon mechanically By crimping | bonding by the method of a coupling | bonding etc., the internal airtightness of the optical cable junction box was hold | maintained.

However, since the end cap is divided into two parts, such cable lead-out sealing method causes deformation in the flange part of the end cap, which is a plastic injection molded product, due to extreme external temperature change when it is installed for a long time. There was a high problem that the airtightness is lowered. In addition, there is a problem that the number of parts required for the connection is large, the connection work is difficult and cumbersome, the productivity is lowered.

In addition, in the case of the detachable end cap, the position of the cable must be limited to the flange portion of the end cap, and thus, a problem in that a plurality of sets of cables are virtually impossible due to the space limitation of the end cap itself.

The present invention has been made to solve the conventional problems as described above, the object of the present invention is that the end cap is integrated, not only to prevent the airtightness due to the surface shape, but also significantly reduce the mold manufacturing cost and molding cycle of the product Significantly reduce manufacturing costs, simplify the assembly process, improve product reliability and productivity, and eliminate the need for disassembly of connecting parts when reconnecting cables, enabling complete sealing and permanent fastening by just one assembly. SUMMARY OF THE INVENTION An object of the present invention is to provide a cable sealing device for an optical cable junction box, which can be easily applied to connect a plurality of cables, and can increase the practicality and economy of a product.

A feature of the present invention for achieving the above object is, in the cable lead-out sealing device of the optical cable junction box for sealing the lead-in portion of the cable, each having at least two inlets so that the cable can be connected, each of the inner surface of the inlet An end cap having a threaded portion and a sealing space connected thereto; A screw plug having a thread formed on one side of the head having an approximately octagonal shape so as to be engaged with the thread of the end cap, and having a hollow portion into which a cable is fitted; First and second cable washers fitted to the cable at a predetermined distance from each other so as to be located at one side of the screw plug; The sealing space of the end cap is filled in by the crimping of the screw plug and is embedded so that the airtightness is maintained, and in the cable entry / exit sealing device of the optical cable junction box including the airtight holding means located between the first and second cable washers.

In the cable sealing device of such an optical cable junction box, a more preferable feature is that the airtight means is wound with a sticky sealing cord on the cable such that the airtight means is in close contact with one side of the first cable washer, and the airtight means is subjected to the pressing force of the screw plug. Ring-shaped gaskets and bellows gaskets, and ring seals, which are made of an elastic body so that the sealing space of the end cap is filled with airtightness while being deformed to be flexible, are used.

On the other hand, in the present invention, when only one of the inlet of the end cap is used, the cocking means is further used to prevent the use of the inlet, and the cocking means is that the cocking screw and the cocking plug are used.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a preferred embodiment of a cable entry part sealing device of an optical cable junction box according to the present invention will be described in detail with reference to the accompanying drawings.

(A) (b) of FIG. 1 thru | or FIG. 8 is a figure shown in order to demonstrate the cable entry part sealing apparatus of the optical cable junction box which concerns on this invention.

First, as shown in FIGS. 1 and 2, the end cap 10 is basically designed to have two inlets 11A and 11B to enable two sets of cable connections.

The end cap 10 is formed with a thread 12 on each of the inner surfaces of the inlets 11A and 11B, and the thread 12 of the end cap 10 is a toothless thread having a large fastening force in one direction. ) And a sealing space (13) is formed in the center of the end cap (10).

On the other hand, it is easily understood that the end cap 10 can be produced by appropriately changing the number of the inlets 11A and 11B to three or more as necessary.

As shown in FIG. 3, the screw plug 20 has a thread 22 formed on one side of a head 21 so as to be engaged with the thread 11 of the end cap 10. The thread 22 is formed of a toothed screw having a large fastening force in one direction.

The head 22 of the screw plug 20 is formed in an approximately octagonal shape so that it can be easily fastened by a work tool, for example, a spanner.

As shown in FIG. 5, the thread 12 of the end cap 10 and the thread 22 of the screw plug 20 are easily tightened at low torque and are not easily loosened. It is preferable that angle (theta) 1 (theta) 2 of (22) is formed in about 45 degrees, respectively.

Referring to FIGS. 2 and 3 again, a hollow portion 23 is formed in the center of the screw plug 20, and the screw plug 20 has a check ring ( The checking ring 25 is fitted adjacent to the head 21.

The checking ring 25 serves as a safety device that prevents the loosening of the screw 22 of the screw plug 20 in the state in which the screw 22 of the screw plug 20 is fully engaged with the screw 11 of the end cap 10.

And, the screw plug 20 is fitted with a cable (Ca) in the hollow portion 23, wherein the screw plug 20 is located at a predetermined distance away from the end of the cable (Ca).

On the other hand, the first cable washer 30 is fitted to the cable Ca so as to be positioned adjacent to one side of the screw plug 20, that is, the side of the screw line 22.

The airtight holding means is built so that the sealing space 13 of the end cap 10 mentioned above is filled by the crimping | compression of the screw plug 20, and airtight is maintained.

A sealing cord 40, which is an airtight holding means, is wound around the cable Ca so as to be in close contact with one side of the first cable washer 30, and the sealing cord 40 uses a relatively high adhesiveness. do.

In addition, the second cable washer 31 is fitted to be positioned on one surface of the sealing cord 40, and a ring 32 is interposed between the sealing cord 40 and the second cable washer 31. That is, the sealing cord 40, which is an airtight holding means, is wound around the first and second cable washers 30 and 31 separated from each other by a predetermined distance and positioned.

Here, the thickness of the sealing cord 40 is wound so as not to exceed the height of the first and second cable washers 30 and 31. That is, the thickness of the sealing cord 40 is wound so as not to deviate from the diameter of the first and second cable washers 30, 31. In addition, the axial length of the sealing cord 40 is preferably adjusted to wind appropriately.

The first and second cable washers 30 and 31 prevent the direct contact between the screw plug 20 and the sealing cord 40, thereby circumferentially connecting the sealing cord 40 by the fire of the screw plug 20. This prevents excessive torsional stress from occurring.

The end cap 10, the screw plug 20, and the first and second cable washers 30 and 31 are manufactured by plastic injection molding.

On the other hand, the present invention described above has been described that the sealing cord 40 is embedded in the sealing space 13 of the end cap 10 as the airtight holding means, but this is only one example.

That is, as shown in (a) of FIG. 6, the sealing cord 40 which is an airtight holding means can use the gasket 50 of the ring-shaped body made from an elastic body as needed.

The gasket 50 is subjected to the pressing force of the screw plug 20 and is flexibly deformed by its own elastic force, so that the sealing space 13 of the end cap 10 is filled by the gasket 50 to be hermetically sealed. Will be maintained.

As shown in FIG. 6 (b), the sealing cord 40 which is an airtight holding means can use a bellows gasket 51 of a ring-shaped body made of an elastic body if necessary.

The bellows gasket 51 is subjected to the compressive force of the screw plug 20 and is flexibly deformed by its own elastic force, so that the sealing space 13 of the end cap 10 is filled by the bellows gasket 51. Confidentiality.

At this time, since the bellows gasket 51 is freely deformed than the gasket 50, the bellows gasket 51 can obtain a more excellent effect on airtightness.

As shown in (c) of FIG. 6, the airtight holding means can use a ring seal 52. As shown in FIG. The ring seal 52 is simple in structure and can effectively maintain airtightness in the sealing space 13 of the end cap 10.

On the other hand, when only one of the inlets 11A and 11B of the end cap 10 is used, for example, when only the inlet 11A is used and the inlet 11B is not used, the inlet 11B is not used. This is prevented by means of cocking.

As shown in Fig. 7, the cocking means uses a cocking screw 60. The cocking screw 60 has a thread 62 formed on one side of its head 61, and the thread 62 of the cocking screw 60 is engaged with the thread 12 of the end cap 10.

Here, the head 61 of the cocking screw 60 is formed in an approximately octagonal shape, and it was shown that the hollow portion 63 is formed in the center of the cocking screw 60, but the hollow portion 63 is required. It may be easily understood that it may not be formed accordingly.

On the other hand, as shown in (a) of FIG. 8, the above-mentioned cocking means can use the cocking screw 60 together with a cocking plug 65. As shown in FIG.

The cocking plug 65 has a cylindrical body 67 extended to one side of the head 66, and the body 67 is fitted to the hollow portion 63 of the cocking screw 60 to correspond to each other.

That is, in the state where the body 67 of the cocking plug 65 is fitted in the hollow portion 63 of the cocking screw 60, the thread 62 of the cocking screw 60 is the thread 12 of the end cap 10. ) Is fastened to.

As shown in FIG. 8B, between the hollow portion 63 of the above-mentioned cocking screw 60 and the body 67 of the cocking plug 65, the sealing cord 40, which is the airtight-keeping means described above, is provided again. can do.

On the other hand, between the hollow part 63 of the cocking screw 60 and the body 67 of the cocking plug 65, an airtight holding means is interposed between the gasket 50, the bellows gasket 51, and the ring seal 53. Applicable one is easily understandable.

As described above, the sealing process for the cable lead-out sealing device of the optical cable junction box according to the present invention will be described.

First, as shown in FIG. 2, the check ring 25 is inserted into the thread 21 of the screw plug 20 so as to be adjacent to the head 21, and connected to the hollow right 23 of the screw plug 20. Insert the end of the cable (Ca) you want to make. At this time, the screw plug 20 is positioned away from the end of the cable (Ca) by a predetermined interval.

Then, the first cable washer 30 is inserted into the cable Ca so as to be located at one side of the screw plug 20, and the airtight keeping means is secured to the cable Ca so as to be in close contact with one side of the first cable washer 30. The sealing cord 40 is wound and a second cable washer 31 is fitted to one side of the sealing cord 40.

That is, the sealing cord 40 is wound between the first and second cable washers 30 and 31, and the sealing cord 40 is interposed between the sealing cord 40 and the second cable washer 31. . Here, the thickness of the sealing cord 40 is appropriately wound so as not to exceed the height of the first and second cable washers 30 and 31.

As shown in FIG. 3, the cable Ca, on which the sealing cord 20 is wound, is sealed through one of the inlets 11A, 11B of the end cap 10, for example through the inlet 11A. ) Into the

As shown in FIG. 4, in such a state, the screw plug 20 is mounted on a work tool such as a spanner, such that the thread 12 of the end cap 10 and the thread 22 of the screw plug 20 are engaged. When it is returned to, the sealing cord 20 is flexibly deformed by the compression of the screw plug 20 to fill the sealing space 13 of the end cap 10. As a result, airtightness is maintained in the sealing space 13 of the end cap 10.

At this time, the thread 12 of the end cap 10 and the thread 22 of the screw plug 20 are formed of toothed screws with a large fastening force in one direction, and the angles θ1 and θ2 of the threads 12 and 22. ) Are each formed at about 45 °, so they are easily fastened with low torque and are not easily loosened.

On the other hand, in order for the thread 22 of the screw plug 20 to be fastened to the thread 12 of the end cap 10, the axial repulsive force of the sealing cord 20 must be overcome. Since the head 22 of the screw plug 20 is formed in an approximately octagonal shape, the use of a work tool by a spanner or the like becomes convenient, and damage to the head 22 is easily prevented. That is, the fastening operation of the screw plug 20 is more easily performed.

In this process, the first and second cable washers 30 and 31 prevent direct contact between the screw plug 20 and the sealing cord 40, and thus, the sealing cord 40 is rotated by the screw plug 20. This effectively prevents excessive torsional stress in the circumferential direction.

Further, in the state where the screw thread 22 of the screw plug 20 is completely engaged with the thread thread 11 of the end cap 10, the thread thread 12 and 22 are loosened from each other by the action of the check ring 25. Since this is prevented, the reliability of the product is remarkably improved.

As shown in FIG. 6 (a), the present invention can use a ring-shaped gasket 50 made of an elastic body as the airtight holding means, and the gasket 50 is capable of compressing the pressure of the screw plug 20. Given by being elastically deformed by its own elastic force is filled in the sealing space 13 of the end cap 10 to maintain the airtight.

As shown in FIG. 6 (b), the airtight holding means may use a ring-shaped bellows gasket 51 made of an elastic body if necessary, and the bellows gasket 51 is more deformed than the gasket 50. Since it is made free, the bellows gasket 51 can obtain the more excellent effect to maintain airtightness.

As shown in FIG. 6C, the airtight holding means can use the ring seal 52 as necessary. The ring seal 52 has a simple structure and a sealing space 13 of the end cap 10. ) Can effectively maintain confidentiality.

On the other hand, in the present invention, since the end cap 10 is manufactured integrally, not only the airtightness deterioration due to the deformation of the end cap 10 is effectively prevented, but also the manufacturing cost of the product is greatly reduced by reducing the mold production cost and molding cycle (cycle) Significantly reduced.

In addition, since parts such as bolts and nuts, which are required for assembly in the conventional detachable end caps, are unnecessary, the assembling process is simplified and the assembly and productivity of the product are improved. This effect is further enhanced when two sets of cables Ca are connected to the inlets 11A and 11B of the end cap 10.

In the present invention, even when the optical cable junction box is disassembled for the connection of the cable Ca again, the connection part fitted to the cable Ca, that is, the screw plug 20 and the first and second cable washers 30 31, the sealing cord 40 etc. which are airtight holding means do not need to be disassembled. Thus, only one assembly enables perfect sealing and permanent fastening.

On the other hand, in the present invention, the optical cable junction box can be connected to a plurality of sets of cables (Ca) depending on whether the internal space is utilized. In short, if there is an inevitable reason to increase the capacity of the cable Ca, the capacity of the screw plug 20 and the internal dimensions of the first and second cable washers 30 and 31, i. Cable Ca can be connected.

For example, if the design with a margin to allow the switch from the basic 60-core cable to 144-core cable, the same end cap 10 can be applied as it is to increase the practicality and economical efficiency of the product.

As shown in FIG. 7, when only one of the inlets 11A and 11B of the end cap 10 described above is used, for example, only the inlet 11A is used and the inlet 11B is not used. The inlet 11B which does not fit is prevented by fastening the thread 62 of the cocking screw 60 to the thread 12 of the end cap 10.

And, as shown in FIG. 8A, the above-mentioned cocking screw 60 of the cocking means can be used together with the cocking plug 65. The cocking plug 60 is provided on the hollow portion 63 of the cocking screw 60. As shown in FIG. In the state where the body 67 of 65 is fitted, the thread 62 of the cocking screw 60 is fastened to the thread 12 of the end cap 10 to block the inlet 11B of the end cap 10. .

In addition, as shown in FIG. 8B, the sealing cord 40, which is an airtight holding means, is interposed between the hollow portion 63 of the above-mentioned cocking screw 60 and the body 67 of the cocking plug 65. The opening 11B of the end cap 10 may be blocked, and the sealing cord 40, which is an airtight holding means, may be applied to the gasket 50, the bellows gasket 51, and the ring seal 53. .

On the other hand, the above embodiment is merely to describe one preferred embodiment of the present invention, the scope of the present invention is not limited to this, and can be changed as appropriate within the scope of the same idea.

As described above, according to the cable lead-out sealing device of the optical cable junction box according to the present invention, the end cap is integrally manufactured to effectively prevent the airtightness deterioration due to deformation, as well as significantly reduce the mold manufacturing cost and molding cycle, the production cost of the product This is a significant savings.

In addition, the assembly process is simplified to improve the assembly and productivity of the product, and when disassembling to reconnect the cable, connecting parts such as screw plugs do not need to be disassembled. It is possible to fasten, and can be easily applied to connect a plurality of cables to increase the practicality and economical efficiency of the product.

Claims (11)

In the cable entry part sealing apparatus of the optical cable junction box for sealing the cable entry part of a cable, it has each at least 2 inlet 11A, 11B so that connection of the said cable Ca is possible, The said inlet 11A, 11B End caps (10) are formed in each of the inner surface of the thread 12 and the sealing space (13) connected to each other; A thread 22 is formed at one side of the head 21 having an approximately octagonal shape so as to be engaged with the thread 11 of the end cap 10, and a hollow portion 23 into which the cable Ca is fitted at the center thereof. A screw plug 20 formed; First and second cable washers (30) (31) inserted into the cable (Ca) at predetermined intervals so as to be located at one side of the screw plug (20); The airtight space 13 of the end cap 10 is filled up by the compression of the screw plug 20 so that the airtightness is maintained, and the airtightness is located between the first and second cable washers 30 and 31. Cable entry and exit sealing device of the optical cable junction box including a holding means. The screw thread (12) of the end cap (10) and the screw thread (22) of the screw plug (20) are formed of toothed screws with a large fastening force in one direction. The cable entry / exit sealing device of the optical cable junction box whose angle (theta) 1 (theta) 2 is formed in about 45 degrees, respectively. According to claim 1, wherein the screw plug 20 is the head (1) on one side of the screw thread 22 so that the plug phenomenon is prevented in the state in which the screw thread 22 is engaged with the screw thread 11 of the end cap (10) A cable entry / exit sealing device of an optical cable junction box in which a check ring (25) is fitted adjacent to (21). 2. The apparatus of claim 1, wherein a ring (32) is interposed between the second cable washer (31) and the airtight holding means. The cable lead-out portion of the optical cable junction box according to claim 1, wherein the airtight holding means is wound around the cable (Ca) with a large sealing rod (40) wound on one side of the first cable washer (30). Sealing device. 6. The apparatus of claim 5, wherein the thickness of the sealing cord (40) is wound so as not to exceed the diameter of the first and second cable washers (30) (31). The method of claim 1, wherein the airtight holding means is formed of an elastic body so that the sealing space (13) of the end cap (10) is filled with the compression force of the screw plug 20 is filled with flexibility to maintain the airtight Cable entry / exit sealing device of optical cable junction box in which upper gasket (50) is used. The method of claim 1, wherein the airtight holding means is formed of an elastic body so that the sealing space (13) of the end cap (10) is filled with the compression force of the screw plug 20 is filled with flexibility to maintain the airtight Cable lead-out sealing device of an optical cable junction box using the upper bellows gasket (51). The ring seal 52 of claim 1, wherein the airtight holding means is filled with the sealing space 13 of the end cap 10 while being flexibly deformed by the pressing force of the screw plug 20 to maintain the airtightness. Cable entry and exit sealing device of the optical cable junction box used. The optical cable according to claim 1, wherein when only one of the inlets 11A and 11B of the end cap 10 is used, an unused one of the inlets 11A and 11B prevents the caulking means from being used. Cable entry and exit sealing device of junction box. The optical cable connection according to claim 10, wherein the caulking means is used with a caulking screw (60) in which a thread (12) is formed on one side of the head (61) so as to be fastened to the thread (12) of the end cap (10). Cable entry and exit sealing device.