JPH0336917A - Joint terminal box - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention applies to blasting ill! such as CCP. Regarding connection terminal boxes for communication cables.

[Prior art]

For example, as shown in FIG. 5, a plastic communication cable P such as CCP is manufactured by forming a plurality of tape winding layers such as rough tape around the outer periphery of a cable core a, and then forming a supporting wire C.
In addition, an outer covering d is provided. Cable core a usually collects 10 pairs of communication lines to form a subunit,
I bundle the required number of them.

A connection terminal box is used for a straight line connection, a branch connection, and a lead-in branch to a subscriber's home for this communication cable P.

As shown in FIG. 8, in this connection terminal box, cable holding members 2 are screwed to both ends of a base 10 provided with a plurality of half-punch holes 1a, and a reinforcing rod 8 is inserted between both holding members 2.2. The cable P is installed across the cable P and clamped and fixed. Conventionally, the above-mentioned connection and branching work has been performed by the following method (steps (1) to 0).

(1) Cut the cable body p and support wire C slightly longer than the length of the connection terminal box A by inserting a knife into the neck (7th
Figure (a)).

(2) Peel off the ξ veneer sheath (outer sheath d) between about 10 c + w inside from the cable holding member 2, and then peel off the outer end of the laminate sheath d about 200 mm in the length direction by 3 to 4
Make a cut in the book with a knife and tear it apart ((a) in the same figure)
.

(3) Wrap the sealing tape e to the required thickness around the cable core (cape core a and winding layer b) to create a seat floor, and attach the inner clamp 9 on this seat floor (see figure 1).

(4) Put the torn laminate sheath d' back into place and fix it on the cable core with adhesive tape e' ((C) in the same figure).
).

(5) Remove the rough tape, etc. (wound Jib) on the cable core at the part where the laminate sheath d has been peeled off ((d) in the same figure).

(6) Loosen the screws on the cable holding member 2, and with the inner clamp 9 interposed, attach the part of the inner clamp 9 (same part wrapped with sealing tape) to the cable holding member 2.
and fix the cable P to the cable holding member 2 by screwing it together with the reinforcing rod 8 ((e) and (f) in the same figure).
, see Figure 8).

(6)' When connecting a cable P to another cable P in a straight line without branching the cable P, untwist the support wire C terminals of both cables P and wrap them, so-called winding. Connect using Grinobu g (same figure (
e)).

Note that when the wiring of the cable P is completed (cable end), the support wire C is wound around a wire fixed to a fixed object (such as a utility pole) and connected by a grip g.

(7) Open the upper part of the cable extension part 10a (nozzle) of the end wall member by removing the dovetail fitting in the axial direction, and open the cable body p,
Load the support wires C in this order, dovetail the end wall member 10 and base 6, restore the dovetail fit on the upper part of the cable extension 10a, and then connect the end 10a of the cable extension Wrap adhesive vinyl tape h between cables 2 to make them watertight (see figure (gt)).

(8) Attach the required number of 4-pair terminal blocks 11 to the base 1 (same figure (cloudy)).

(9) 2 near both ends after peeling off the laminate sheath d
At each point, tie each unit with thread, cut the core wire r of the unit that is to be branched, and strip off the insulation ((5) in the same figure).
).

00) When connecting to the subscriber's house (user's house) via the terminal block 11, connect the core conductor r with the insulation stripped off to the terminal block 11 (via the lead wire if necessary), and connect it to the base 1. The lead-in wire r' drawn in from the half-punch hole 1a is connected via the terminal block 11 (see (i) in the same figure).
)), and the half-punch hole 1a is the hole 1a.
If you hit the inside hard, it will open.

(10a) When branching and connecting an unpaired cable P' from a large pair cable P (cable with many units),
Branch cable introduction part (nozzle) 10a' (in Fig. 4),
(C)) and introduce the unpaired cable P' from (see (C)).
) to (6) are performed, the insulation at the end of the core wire r is stripped off, a polyethylene sleeve k is inserted into one of the core wires in advance, the conductor is connected by twisting and soldered, and then the sleeve cover.

(Figure 0)).

(10b) In the case of the above-mentioned straight connection, strip the insulation from the ends of all the core wires r of the cable P, insert the polyethylene sleeve k into one of the core wires in advance, and connect the conductors by twisting them. After attaching half ffJ, cover with the sleeve k.

(Put the ID cover 12 over the reinforcing rod 8, and lock the cover 12 by sliding the locking member 8a of the reinforcing rod 8 and connecting it to the locking piece 12a on the inner surface of the upper part of the cover (see the figure).

021 The construction is completed by fitting the cover 12 onto the end wall member 10 and the base 1 in a dovetail pattern (see (p, ) in the same figure).

[Problem to be solved by the invention]

In this way, the conventional cable connection process to the VE terminal box involves the process of tearing the outer jacket 4 into 3 or 4 pieces and disposing of them ((2) to (4) above). This point is an issue.

(1) Place the laminate sheath d in the axial direction of the cable
It is necessary to tear four pieces and wrap a sealing tape e around the portion to be held by the cable holding member 2, and it is also necessary to press and wrap the torn laminate sheath d' with an adhesive vinyl tape e' or the like.

(2) When tearing the laminate sheath d, there is a risk that the sheath d may be cut too far and the insulated core wire (cable core a) may be damaged or the construction worker may be injured.

(3) When a cable is strung for many years, the insulation of the insulated core wire inside the connection terminal box deteriorates due to exposure to high temperatures, ultraviolet rays, or other gases, but the part covered by the sheath does not deteriorate. Therefore, it is not a waste to replace the deteriorated cable, so it is economical to remove the sheath from both sides and take out the well-insulated parts for use. However, this is not possible with current terminal boxes, and the torn laminate sheath d' also deteriorates.

In view of the above points, the present invention improves work safety by eliminating tearing of the cable jacket in the axial direction, shortens the insulation deteriorated portion of the insulated core wire, and prevents damage to the insulated core wire. To provide an insulated terminal box that enables cable connection without fear and at low cost, and when the insulated core wire deteriorates, the sheath can be peeled off and a new insulated core wire can be taken out to renew the cable.

[Means to solve the problem]

In order to achieve the above object, in the present invention, in the conventional example, the cushioning material when the cable is supported by the cable holding member is not used by the sealing tape e, but by a bushing fitted on the outer surface of the jacket d. At the same time, the distance between the cable holding members can be adjusted.

In other words, a base provided with a plurality of half-punch holes, a cable holding member installed upright near both ends of the base to sandwich the cable, a reinforcing rod installed between the two cable holding members, and this reinforcing rod. A member that locks the cover that is slidably fitted to the rod, an end wall member that has an opening through which a cable fitted to both ends of the base passes, and the cable holding member and the cable held therein. The cable holding member includes a rubber bushing with a notch inserted therein to guide the cable, and a cover that surrounds the end wall member, the reinforcing rod, and the base, and the cable holding member is connected to the length of the base and the reinforcing rod. The structure was designed so that it could be moved and fixed in any direction.

[Effect]

When connecting a cable using the connection terminal box according to the present invention configured as described above, the laminate sheath between the cable holding members is peeled off without tearing the overlay sheath (outer sheath) in the length direction. One distal end of the accommodating sheath is held by a cable holding member via a rubber fencing. With this bushing, the tightening force caused by fastening the holding member is reduced to V&, and there is no problem with the cable core (insulated core wire).

In addition, when the insulated core wire inside the connection terminal box deteriorates, open the terminal box, remove the deteriorated insulated core wire, insulate a new insulated core wire in the removed part, and remove the cable holding member as desired. Move and fix the cable into position, and support the cable at a point other than its connection.

〔Example] Next, embodiments of the present invention will be described with reference to the accompanying drawings.

FIG. 1 is a diagram illustrating a connection terminal box according to the present invention with both end wall members and a cover removed.

In the figure, reference numeral 1 denotes a base, which is made of plastic, and since it is exposed to sunlight and wind and rain, a mixture containing materials with high corrosion resistance is used. Reference numeral 2 denotes a cable holding member, and in this embodiment, the structure w4 is formed as shown in FIG. It is fixed and erected on the heath 1 via the +J vent 4. A hole 4a for the rivet 4 is formed in the length direction of the base 1.

5 is a ring-shaped rubber bushing used when clamping the cable P to the cable holding member 2;
For example, as shown in Fig. 3, the overall shape is a ring with ribs 6 on both sides, and a part of the outer periphery is shaved off to reduce the thickness, and a cut 7 is formed from the center of the part toward the center. In addition, there are non-chips 7' at regular intervals on both sides.
is engraved. When the clamping cable P becomes thinner, this notch 7' cuts off the end 5ta along the notch 7' so that the inner diameter of the dancing 5 matches the diameter of the cable P. In other words, the diameter can be reduced.

In addition, there are four types of rubber bushings 5 as shown in Table 1 below (
Available in sizes S, M, L, and extra L.
The cables P are used depending on the size of the cables P to be connected, and cables P of intermediate sizes are cut to match the dimensions by using the notch 7' as a mark.

Table 1 Unit (■) 8 is a cable holding member reinforcing rod, which is installed between the cable holding members 2 erected at both ends of the base 1 to reinforce the cable holding member 2 and prevent the cover 12 described later from coming off. This is to mount the ronok member 8a for the purpose of the operation.

An inner clamp 9 is interposed in the cable holding member 2 so that a clamping force when clamping the cable P is applied evenly. In addition, cable P is shown.

Next, a connection processing method will be explained. In the case of the present invention, compared to the conventional example, the following points (a), (b), and (C) are achieved.
are different. That is, (1) −(a) −(t))
→(5)→(6) and (C)→(6)'→(7)→(8
) →(9) →Qω→(10a) −(10b) →
(II) → (branch).

(a) Make a cut in the outer circumferential direction of the laminate sheath d near the inside of the cable holding member 2 of the terminal box, and then make a cut in the axial direction between them and peel off the laminate sheath d.

(b) Based on Table 1, select a rubber bushing that matches the outer diameter of the cable P, and if the bushing 5 is large, cut the thin part (end 5') using the notch 5' as a guide to match the dimensions and hold the cable. It is interposed between the member 2 and the cable P.

(C) Attach the inner clamp 9 to the support line C.

Note that the position of the cable holding member 2 is appropriately determined in consideration of the holes 4a and 9a.

[Construction Example 1] This construction example is an example in which a branch line is drawn out to a subscriber's home from a CCP cable P strung over a utility pole.

■ Approximately 20 (
Make a notch in the length direction between the cable body p and the support line C at a long distance using a jig such as a knife, and separate the support line C from the cable body p.

■ The internal insulated core wire (cable core) a is scratched in both left and right directions from the center of the notch made in the neck and in the direction of the outer periphery of the laminate sheath d of the cable P for a length shorter than the distance between the cable holding members 2. Make a notch so that it does not enter, then make a notch in the length direction between them and peel off the sheath d. At this time, if two longitudinal cuts are made, the laminate sheath d can be easily peeled off.

■ Remove the screws on the cable holding member 2, and remove the cable body p.
, insert the support wire C into the predetermined position, and tighten the inner clamp 9.
is inserted between the holding member 2 and the cable P, and
A rubber bushing 5 is inserted between the cable body ρ and the holding member 2.

■ Fix the top of the cable holding member 2 together with the reinforcing rod 8 with screws. At this time, the reinforcing rod 8 is tightened, and the cable main body p and the support wire C are also tightened.

■ Attach the branch connection block 11 to the base 1, pull out the specified communication circuit of the cable P using a walnut, peel off the insulation coating, connect the lead wire to the exposed conductor, and insulate the connection part. and connect it to the branch connection block 11 set on the base 1.

(2) Punch out a half-punch hole 1a in the base 1 and connect the negative end of the subscriber's home drop-in line r' to the connection block 11.

■ Tighten the screw under the cable holding member 2 to fix the cable body p.

(2) Fit the end wall members 10 to both ends of the base 1 and engage them with the grooves.

■ Cover 12 is placed over the top of the reinforcing frame 8, and the locking member 8a, which is fitted onto the reinforcing frame 8 and slides, is pushed into the receiving part (locking piece 12a) on the inner surface of the cover 12 to lock the cover 12.
Both skirts of the base 1 are engaged with fitting grooves provided on the longitudinal edge of the base 1.

[Phase] Adhesive vinyl tape is wrapped around the cable extension cylindrical portions 10a of both end wall members 10, and the construction is completed.

[Construction Example 2] This construction example is for branching a small logarithm cable core from a large logarithm plastic cable P. First, ■ to ■ are the same as [Construction Example 1].

(2) Insert the branch cable P' into the branch cable extension tube 10a' of the end wall member 10 (in this construction example, the main cable P has 200 pairs of CCP and the branch cables have 50 pairs).

■ Strip off the end sheath of branch cable P' and
Connect the 0 pair to the 50 pairs (subunit) of the main cable P in the same way as the lead wires (conductors, drop-in wires) r and r',
Insulate.

■ Insert the rubber bushing 5 between the branch cable P' and the cable holding member 2, and tighten each cable holding member with screws.

Hereafter, the construction will be carried out in the same manner as in steps ① to [phase] of [Construction Example 1].

[Construction Example 3] In this construction example, the insulated core wire r is replaced when it has deteriorated due to long-term installation of the cable P. First, the insulated terminal box A is disassembled, Loosen the screws 4.9' of the cable holding member 2 and remove it from the base 1 and reinforcing frame 8. Next, as shown in FIG. For example, the laminate sheath d, which is about 10 cm long, is cut and divided and removed as shown in (1) in the same figure, and the insulated core & I with no insulation deterioration are removed.
Cut and remove the insulated core wire r where deterioration has occurred between r.

Next, as shown in Figure (C), a new insulated core 11s of the same quality as the cut insulated core wire r is ground between the cuts, and its terminals are soldered, hand-twisted, and P
Connect to each insulated core wire r of the cable P using an E sleeve or the like. When all the insulated core wires r and S are connected, the same figure (
As shown in d), an insulating tape is wound around this connection portion, and an insulating sleeve (split) is fitted to perform insulation treatment.

Next, move the cable holding member 2 outward and align it with the preliminary holes 4a and 9a of the base 1 and reinforcing frame 8, and then screw 4.
', and then follow the steps (4) and 02) above,
Connect the various core wires inside the connection box A, and assemble the connection surface A.

Through the above operations, the insulated core wire r can be updated without relining the entire cable P.

In addition, the above construction example 1.2.3 is the above conventional example (1) to 0.
See 7J.

〔effect〕

In the present invention as described above, since the rubber bushing is interposed between the cable holding member and the cable, vertical tearing of the cable sheath (outer cover)
This eliminates the need for tearing (tearing) and wrapping of sealing tape, eliminates variations in construction work depending on the skill level of workers, and reduces construction time.

In addition, the length of the insulated core wire that deteriorates in insulation is shortened, and the insulated core wire can be replaced without replacing the entire span cable, which has the effect of making the replacement work inexpensive and easy. .

[Brief explanation of drawings]

FIG. 1 is a perspective view for explaining the inside of an embodiment according to the present invention, FIGS. 2(a) and (b) are front and side views of a cable holding member and an inner clamp, and FIGS. b) is a front view and side view of the rubber bushing, Fig. 4 is an external view of each side of the connection terminal box, Fig. 5 is a cross-sectional view of the communication cable, and Fig. 6 K(a) to (d) are , an explanatory diagram of the updating work of the insulated core wire in the example, FIGS. 7(a) to (ffi) are explanatory diagrams of the insulated core wire connection in the conventional connection terminal box, and FIG. 8 is FIG. 7(e)
FIG. a... Cable core, b... Tape first turn layer, C... Support line, p...
...Cable body, d...Outer sheath (laminate sheath), P, P'...Cable, 1...
...Base, la...Half punch hole, 2
...... Cable holding member, 4.9'... Screw, 4a, 9a...
・Screw hole, 5...Rubber bushing, 7...
...Depth of cut, 7'...Non-chi, 8...
... Reinforcement frame, 8a ... Candle member, 9
... Inner clamp, 10 ... End wall member, 11 ... Terminal block, 12 ...
...Cover 12a...Locking piece.

Claims (1)

[Claims] (1) A base provided with a plurality of half-punch holes, a cable holding member that clamps the cable erected near both ends of the base, a reinforcing rod installed between both cable holding members, and A member for locking the cover slidably fitted to the reinforcing rod, an end wall member having an opening through which a cable fitted to both ends of the base passes, and the cable holding member and the cable held therein. The cable holding member consists of a rubber pusher with a notch inserted therebetween to guide the cable, and a cover that surrounds the end wall member, the reinforcing rod, and the base, and the cable holding member is arranged between the base and the reinforcing rod. A connection terminal box characterized by having a structure that can be moved and fixed in the length direction.