JP2903277B2 - Connection fitting to connect cable support wire to cable support - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION A cable support line for suspending an overhead communication cable (hereinafter referred to as "support line") is fixed to a utility pole by an appropriate means. The present invention relates to a connection fitting for connecting the above-mentioned support wire to a power pole, in order to simplify and easily perform an operation of connecting one end of a tensioned, hard and strong cable support wire to a power pole. It is effective when used, and can also be used when a wire rope material other than the cable support wire, for example, a branch wire of a utility pole is fixed to a utility pole or an underground anchor.

[0002]

2. Description of the Related Art A conventional technique will be described with reference to FIGS. With the U-shaped winding grip 1 hooked on the thimble 4c of the fixed band 4 of the telephone pole P,
The left and right winding portions a and a 'are gripped by hand and wound around the cable support wire b, and the support wire is fixed to the utility pole P. The winding grip 1 has the shape and structure shown in FIG.
The ring portion 1a is a steel stranded wire formed by twisting a large number of steel wires, and left and right winding portions a and a 'are arranged such that the steel wires are arranged in a belt shape, and the steel wires are spirally wound around a support wire. It is what it was. An annular portion 1a of the winding grip 1 is formed in an annular shape so as to have tensile strength, and a thimble 4c is used for the fixed band 4 in order to maintain the annular shape. Pole work table attached to telephone pole P (Fig. 10 (a)),
Or scaffold bolts attached to telephone pole P [Fig. 10 (b)]
And winding the winding portions a and a 'of the winding grip 1 around a cable support line (hereinafter, referred to as "support line") b. Since the winding grip is hard and has high rigidity,
A considerable force is required to wind the winding portions a and a ', and at the stage of winding the leading ends of the winding portions a and a', it must be wound using a tool such as pliers. Further, at the time of winding, in order to reduce the frictional force due to the pressure contact between the support wire b and the winding grip and to improve the engagement of the winding portions a and a 'of the winding grip with the support wire, the winding portion of the winding grip is used. Is wound around the support wire b while expanding it by hand, but there are many cases where other support wires and the like are arranged at a narrow interval around the support wire b, and the winding portion of the winding grip is supported by hand. Often not enough space is available to wind around line b. Furthermore, when attaching the support line b,
A tensioning device (a device that pulls the support wire to apply tension) K is used. However, since the wire rope of this tool approaches the support wire b, it is necessary to manually wind the winding portions a and a ′ of the winding grip. Is often difficult to take up enough space. When the winding grip is wound around the support wire of the self-supporting cable, the winding of the winding grip is performed after the support wire coating is peeled off. . Further, when the tension of the support wire needs to be adjusted after the winding grip is attached to the support wire, the tension of the support wire cannot be adjusted unless the winding grip is removed from the support wire. For the above reasons, the work of attaching the winding portions a and a 'of the conventional winding grip 1 is a difficult work, and furthermore, the worker stands on a narrow pole work bench or a scaffold bolt at a high place. Since the work is performed, the posture of the worker becomes unstable, so that there is a problem of lack of safety.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned circumstances, and involves a troublesome connection operation of winding the winding portions a and a 'of the winding grip around the support wire b as described above. And without connecting, one end of the support wire is easily and easily connected to the telephone pole without peeling off, especially in the case of unsupported support wires, especially in the case of coated support wires of self-supporting type cables. It is an object of the present invention to make it possible and to easily adjust the tension of the support wire.

[0004]

Means taken to solve the above-mentioned problem of the present invention are constituted by the following elements (a) to (f). (A) a chuck for detachably connecting one end of a cable support wire, a hook for detachably connecting to a fixed band fixed to a telephone pole, and a cable support wire tension adjusting device interposed between the chuck and the hook; (B) a plurality of wedge-shaped gripping pieces which are urged in the releasing direction by a C-shaped spring ring; A biasing spring that biases toward the position, and a release position holding mechanism that holds the biasing spring at the release position; (c) the release position holding mechanism is provided at the rear end of the chuck body; (D) The release position holding mechanism is constituted by a sleeve slidably fitted in the holding cylinder at the rear end of the chuck body in the front-rear direction, and a release operation member connected to the rear end of the sleeve. The biasing spring is interposed between the flange at the outer periphery of the distal end of the sleeve and the holding cylinder. (E) The rear end face of the holding cylinder having the non-circular hole is formed by changing the tip of the release operation member having a non-circular cross section. (F) The screw shaft portion of the hook can be freely rotated only in the longitudinal hole of the connection fitting main body by holding the sleeve at the chuck release position against the urging spring. Screw loosely onto the nut member
The cable support line tension adjusting device is configured.

[0005]

[Operation] A tip of a release operation member having a non-circular cross section is engaged with a rear end surface of the holding cylinder having the non-circular hole, and a sleeve is held at a chuck release position against an urging spring. As a result, the biasing spring is held in a compressed state, and the gripping piece is expanded by the C-shaped spring ring and held in that state. Therefore, the distal end of the cable support wire can be easily and smoothly inserted into the center of the plurality of gripping pieces. After inserting the distal end of the cable support wire, when the release operation member is slightly rotated, the action of holding the chuck in the release position by the engagement between the distal end portion of the release operation member and the rear end surface of the holding cylinder is released, The sleeve is pushed out by the biasing spring, and the plurality of gripping pieces slide to grip the cable support line by wedge action with the inner surface of the conical tip of the chuck body. After connecting one end of the cable support wire to the connection fitting, the hook of the connection fitting is fixed to a utility pole and hooked on a fixing band, and the connection fitting is connected to the utility pole. Thereafter, a predetermined tension is applied to the cable support wire by rotating the nut member screwed to the thread portion of the hook.

[0006]

Embodiments Next, embodiments of the present invention will be described with reference to the drawings. Regarding the first embodiment (see FIGS. 1 to 5), a fixed band 4 fixed to a utility pole (cable supporting column) P with bolts includes a pair of semicircular bands 4 a and bolts 4 b whose length can be adjusted. And used in a conventional coupling mechanism. At one end of the self-supporting type cable 2, the support wire 3 and the communication cable 5 are separated, and the tip of the cable support wire 3 with the coating is inserted into the chuck of the connection fitting 6 to be gripped. 7 is hooked on the bolt 4b of the fixing band 4. The same applies to the case where the branch line 8 is connected to the utility pole by the connection fitting 6. The first embodiment of the connection fitting is as follows (see FIGS. 3 to 5 and FIG. 9). A pair of window holes w are provided facing the hollow cylindrical fitting main body 10 of the connecting fitting, and the holding cylinder 11 and the chuck main body 12 are fitted and fixed to the tip of the main body 10. The chuck body is a hollow body, and the tip portion 13 has a tapered shape. A plurality of gripping pieces 14 having an arc-shaped cross section and an overall shape of a wedge are provided inside the tapered tip. A large number of serrated teeth 15 are provided on the inner surface of the gripping piece 14. The angle of inclination of the teeth is suitably about 60 degrees inward with respect to the horizontal plane. Further, one circumferential groove 16 is provided on the inner surface of the gripping piece 14, and a C-shaped spring ring 17 is fitted in this groove. The gripping pieces 14 are mutually expanded by the C-shaped spring ring. A sleeve 18 is loosely fitted in the holding cylinder 11, and a release operation member 19 is fixed to a rear end of the sleeve 18. An urging spring 21 is disposed between the flange 20 at the distal end of the sleeve 18 and the holding cylinder 11, and urges the sleeve forward by this urging spring. The gripping pieces 14 must be a combination of two or more pieces, but three or four pieces are suitable. Also, each grip piece does not need to be completely divided, and the hollow cone 91
Alternatively, a large number of slots 92 may be provided with some large-diameter ends left to form a large number of grip pieces 93, which may be elastically deformable in the radial direction (see FIG. 9). In this case, the annular portion left at the large-diameter end is the C-shaped spring ring 1 described above.
It will have the same function as 7. A pair of axial grooves 22 facing the inner surface of the holding cylinder 11 are provided, and a pair of protrusions 23 that can be fitted into the grooves are provided on the outer periphery of the release operation member 19. The illustrated state shows the release position, but when the positional relationship between the projection 23 and the groove 22 of the holding cylinder is matched, the holding action of holding the biasing spring at the release position is released, and the release operation member 19 is released. At the same time, the sleeve 18 is pushed forward by the urging spring 21, and the gripping piece 14 is pushed into the distal end portion 13 of the chuck body 12 by the flange. At this time, the gripping piece 14 is pushed inward in the radial direction by the wedge action of the tapered inner surface of the distal end portion 13 of the chuck body 12 and the gripping piece 14, and the teeth 15 on the inner surface of the gripping piece 14 are inserted into the cable supporting wire 3. Into the support wire 3
Is securely held. Pulling the release operation member 19 backward against the urging spring 21, sliding the sleeve 18 rearward, rotating the release operation member 19 in the position shown in the drawing,
The end face of the projection 23 is brought into contact with the end face of the holding cylinder 11,
Hold in release position. At this time, since the grip piece 14 is expanded by the C-shaped spring ring 17, the grip piece 14 moves rearward by the action opposite to the above. A sleeve nut 24 for tension adjustment is attached to the rear end of the metal fitting body 10 so as to be rotatable only. A screw shaft 25 of the hook 7 is screwed to the sleeve nut 24 and locked by the lock nut 26. Loosen the lock nut 26, place a wrench on the hexagonal portion 27 of the sleeve nut 24,
When the hook 7 is attached to the fixed band 4 of the utility pole P when the hook 4 is rotated, the screw shaft 25 of the hook 7
Since the metal fitting body 10 moves back and forth with respect to the screw shaft 25 of the hook 7 without rotating, the tension of the connected support wire is adjusted. The hook 7 ′ attached to the hook 7 is a retaining claw that bends inside the hook but does not bend outside,
This prevents the hook from coming off the bolt 4b of the fixing band 4 of the utility pole P unexpectedly. Next, a second embodiment will be described (see FIGS. 6 to 8). This embodiment is different from the first embodiment in the structure of the fitting main body, and there is no particular difference in other points. A square chuck support member 31 and a hook support member 32 are connected to two tie rods 33,
The chuck body 12 is connected to the chuck support member 31 by the tip of a tie rod and a nut 34. A pair of axial grooves 22 are provided on the inner peripheral surface of the chuck support member 31 (corresponding to the chuck holding cylinder 11 of the first embodiment), and the sleeve 18 is loosely fitted to the chuck support member 31. Note that the hook screw shaft 25 is loosely fitted in the longitudinal hole of the hook support member 32 of the metal fitting body, and is screwed with the nut 35 to adjust the tension of the cable support wire.

[0007]

[Effect] The chuck of the connecting fitting can be gripped as it is without peeling off the coating at the end of the cable support wire. Further, the length of the tip end of the cable supporting wire required for connecting to the utility pole P can be short. Therefore,
When the present invention is applied to a self-supporting cable, it is not necessary to peel off the covering of the cable supporting wire, and the length of separating the supporting wire from the communication cable is often short. The stripping and separating operations are not easy. This requires a great deal of labor and time, but according to the present invention, this labor can be remarkably reduced. Further, the tension can be easily adjusted after the cable support wire is once connected to the telephone pole. Since many of the above works are performed at high places on utility poles or the like, shortening the work time greatly contributes to ensuring safety, and is a great effect in improving work efficiency and efficiency. Further, since the grip is held by the chuck, the same connecting fittings can be used regardless of the diameter of the cable support wire, and the number of types of connecting fittings can be reduced, which is extremely economical. Also, by pulling out the sleeve and slightly rotating the release operation member, the gripping piece is held at the chuck release position, so that the distal end of the cable support wire can be easily and easily connected while freely using both hands. Can be inserted. Further, by slightly rotating the release operation member in the opposite direction, the holding to the sleeve is released, so that the cable support line is instantaneously connected to the connection fitting. Therefore, connection and disconnection of the cable support wire to and from the connection fitting can be performed easily and easily. In addition, since the hooks are directly connected to the bolts of the fixed band, thimbles of the fixed band are not required, and materials can be saved.

[Brief description of the drawings]

FIG. 1 is a schematic view of a use state of a connection fitting of the present invention.

FIG. 2A is a perspective view of a use state of the connecting fitting of FIG. 1;
(B) is a cross-sectional view taken along the line AA of (A), and (C) is a detailed view of the fixed band of (A).

FIG. 3 is a side view of the first embodiment.

FIG. 4 is a longitudinal sectional view of FIG.

FIG. 5 is an exploded view of the first embodiment.

FIG. 6 is a side view of the second embodiment.

FIG. 7 is a longitudinal sectional view of FIG.

FIG. 8 is an exploded view of the second embodiment.

9A is a side view of another example of the gripping piece, and FIG. 9B is a cross-sectional view taken along the line BB of FIG. 9A.

FIGS. 10A and 10B are explanatory diagrams of a conventional technique.

FIG. 11 is a detailed view of a fixed band using a conventional thimble.

FIG. 12 is a partially cutaway front view of the winding grip used in FIG. 10;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Wound grip 1a ... Ring part 2 ... Self-supporting cable 3 ... Cable support wire 4 ... Fixed band 4a ... Band 4b ... Bolt 4c ... Thimble 5. ..Communication cable 6 ... Connecting bracket 7 ... Hook 7 '... Claw 8 ... Branch line 10 ... Bracket body 11 ... Holding cylinder 12 ... Chuck body 13 ... Tip 14 ... Grip piece 15 ... Tooth 16 ... Groove 17 ... C-shaped spring ring 18 ... Sleeve 19 ... Release operation member 20 ... Flange 21 ... Biasing spring 22 ··· Axial groove 23 ··· Projection 24 ··· Sleeve nut 25 ··· Screw shaft 26 ··· Lock nut 27 ··· Hexagonal part 31 ··· Chuck support member 32 ··· Hook support member 33 · ..Tie rods 34 ... nuts 35 ... nuts 91 ... hollow cone 92 ... slot 93 ... gripping piece P ... telephone pole w ... window hole a, a '... winding part b ... cable support line K ...・ Cable wire

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Tokio Kawanabe 1-1-6 Uchisaiwaicho, Chiyoda-ku, Tokyo Nippon Telegraph and Telephone Corporation (72) Inventor Isao Fujibayashi 1-1-1, Uchisaiwaicho, Chiyoda-ku, Tokyo No. 6, Nippon Telegraph and Telephone Corporation (56) References JP-A-64-85517 (JP, A) JP-A-5-316627 (JP, A) JP-A-60-14623 (JP, U) JP-A-60-60 −50035 (JP, U) Fully open 1962-182014 (JP, U) Fully open 1980-88770 (JP, U) Fully open 1960-98528 (JP, U) Really open 1975-4760 (JP, Y1) ) Jikken 34-12456 (JP, Y1) Jigyo 41-16375 (JP, Y1) (58) Fields investigated (Int. Cl. ⁶ , DB name) H02G 7/00-7/22

Claims (1)

(57) [Claims] A chuck for detachably connecting one end of a cable support wire, a hook for detachably connecting to a fixed band fixed to a utility pole, and a cable support wire tension adjusting device interposed between the chuck and the hook. A chuck having a tapered tip end of a chuck body, a plurality of wedge-shaped gripping pieces urged in a releasing direction by a C-shaped spring ring, and the gripping piece facing a gripping position. And a release position holding mechanism for holding the bias spring at a release position, wherein the release position holding mechanism is provided at a rear end of the chuck body, and the release position holding mechanism is provided for the chuck body. A sleeve is slidably fitted to the rear end of the holding cylinder in the front-rear direction, and a release operating member connected to the rear end of the sleeve. The biasing spring is interposed between the holding cylinder and the holding cylinder, and the distal end of the release operating member having a non-circular cross section is engaged with the rear end face of the holding cylinder having the non-circular hole, and is detachably engaged therewith. The sleeve is held at the chuck release position against the urging spring, and the screw shaft portion of the hook is screwed into a nut member loosely and freely rotatably fitted into the longitudinal hole of the connection fitting main body. A connection fitting for connecting a cable support line to a cable support, which constitutes a support line tension adjusting device.