FI107652B - Dead-end clamp for insulated overhead cable - Google Patents

Abstract

Dead-end clamp that can be used for multiconductor cable has wedge-shaped plastic parts disposed between metal plates of body, and cable conductor ends are secured in-between by means of clamping bolt. Thimble with elongated variable-length locking hole is spaced apart from both metal plates. Bracing strap made of stainless-steel wire carries on its ends thickened sections passed through locking hole only at their widest end. Sides of bracing strap are pressed to thimbles due to its inherent stress.

Description

107652

Insulated overhead cable, in particular the hanger cable end holder.

FIELD OF THE INVENTION The present invention relates to plastic parts having insulated overhead cable ends, in particular hanging thread end clamps comprising two metal frame parts, having trough designs for receiving conductor ends between the plastic parts, a clamping screw for clamping the plastic parts between the frame parts and between for locking between the plastic parts, and a pull-on hook for the holder for engaging the holder on a fastening hook on a wall or post, or the like.

In this type of terminal clamps previously used by the applicant, plastic parts are molded around the ends of the drawbar, for which the housing has receiving spaces. This arrangement is suitable for use with small tensile loads, e.g., for connection of one of 15 small diameter conductors. As an end holder for thicker multi-pole conductors, the applicant has used a solution in which the ends of the drawbar are molded over a long distance into a piece of plastic which enters the space between the body pieces over the entire length of the body. This arrangement increases the thickness of the holder, in addition to which the bracket with its fasteners molded thereon forms 20 expensive components.

• · '•' · '*'. In addition, a terminal holder is known in the art in which the body is formed ... of two nested wedges, between which the end of a single cable is wedged. The hook consists of a stainless steel wire with • · · 25 ends at each end engaging the holes at the protruding end of the other wedge. This terminal holder is also suitable for attaching a single cable end.

• · ·

The advantage of using stainless steel wire is that the terminal clamp • · · is suitable for environments susceptible to corrosion.

It is an object of the present invention to provide an end clip suitable for a multi-wire cable (typically 2-4 wires) and having a frame-to-clamp connection between each other. solved in a simple and inexpensive way.

107652 2 This object is achieved by the invention on the basis of the features set forth in the appended claim 1.

Preferred embodiments of the invention are disclosed in the dependent claims.

In the following, two exemplary embodiments of the invention will be described in more detail with reference to the accompanying drawings, in which Figures 1, 2 and 3 show a side, rear and top view of a terminal holder according to a first embodiment of the invention; Figures 4 and 5 are side and rear views of a terminal holder according to another embodiment of the invention (top view corresponding to Figure 3); Figure 6 shows, on a larger scale, a side view of a lower body plate 2 of an end bracket suitable for use in both embodiments; Figures 7 and 8 show, respectively, a partial section and a side view of the plastic parts 3, 4 suitable for use in both embodiments; and Figure 9 shows a third mold used in the embodiment of Figures 4 and 5 on a larger scale and partially cross-sectional (top view corresponding to Figure 8 and top view corresponding to Figure 8); except that the collar 17 and the recess 18 have been replaced. Also, the protective caps 20 of Fig. 8 to increase the surface shear resistance between the conductors • · · l..m and the metal body • are not required in the middle plastic part 14).

• »· • * * · ♦ *

The end bracket according to both embodiments comprises two metal body parts 1,2, between which are plastic parts 3, 4, with trough-shaped moldings 107652 3 for receiving wire ends (not shown) between the plastic parts 3, 4 or the plastic parts 3, 14, 4. . The embodiment of Figures 1-3 is suitable for a cable having two conductors and the embodiment of Figures 4, 5 is suitable for a cable having three or four conductors. The clamping screw passes through the body parts 1, 2 and the plastic parts 3, 4 (and possibly 14) therebetween to press the parts towards each other to lock the conductor ends between the plastic parts. With the help of the pulling handle 6, the holder can be made to engage with a fastening hook or similar fastener on a wall or post.

10 Each of the body parts 1,2 protrudes from the mounting bracket 11,12 of the handle 6 with an elongated, variable width locking hole 9. In the case shown, the lugs 11,12 extend directly into the plate-shaped body parts 1, 2 and have keyhole-shaped locking holes 9 the narrower end points toward the outer end of the mounting bracket. The ends 15 of both arms of the drawbar 6 have thickened protrusions 7 which are dimensioned relative to the locking holes 9 so that they only fit through the locking holes 9 at their wider end. The tension of the bracket 6 compresses the bracket arms against the inner surfaces of the fastening lugs 11,12, whereby the bracket 6 does not pivot under its own weight but remains in the position in which it is turned by force, typically in the position shown in FIG.

♦ · ♦ • · ♦ ·· * • · »♦ · · • · · '. The fastening lugs 11,12 have recesses 13 (Fig. 6) for receiving the lugs 7 of the ends of the bracket 7 in the region of the narrower end of the locking holes 9.

• · ·

The fastening lugs 11,12, the recesses 13 and the locking holes 9 are disposed and shaped with each other in such a way that in the end holder assembled in the operating space the clip 6 cannot be detached. When the locking screw 5 is removed, the body parts 1, 2 · 2 can be pivoted so that the end bumps 7 of the handle 6 can be inserted or removed by moving the bump 7 over the edge of the recess 13 ♦ »· ♦ ♦ · it fits through the hole.

In the cases shown, the end bends 8 of the legs of the handle 6 are made so that the ends of the handle extend away from one another. Alternatively, they could be oriented towards each other, whereby the ends of the arms of the arm 6 would rest against the outer sides of the lugs 11,122. Further, it is possible that the ends of the handle 6 are straight without bends 8, whereby the attachment lugs 11, 12 have the necessary gripping designs or bends.

In both embodiments, the plastic parts 3, 4 resting against the body parts 1, 2 are wedge-shaped in the pulling direction of the end bracket so that the plastic parts 3, 4 expand towards the pulling pin 6. The tensioning screw through holes 16 in the plastic parts 3, 4 and optional third The through hole 16 in all plastic parts 3, 4, 14 has a transverse base 19 which holds a clamping screw 5 at one end of the through hole 16 until the tension 19 breaks the base 19 and slides the body portions 1, 2 towards the thicker end of the wedge shaped plastic parts 3, 4. In addition to this wedge action, adhesion can be enhanced by transverse reinforcement or serration of the troughs 10. The third mold 15 formed between the plastic parts 3, 4 has two troughs 10 on each opposite surface.

Each of the plastic parts 3, 4, 14 has a collar 17 protruding on one side of the through hole 16 of the clamping screw and a recess 18 at the corresponding edge of the hole, which receives the collar 17 of the adjacent plastic part.

Thus, in the overlapping plastic parts 3,14, 4, the collars 17 together form a creep resistance between the ends of the conductors in the troughs 10 and the screw in the hole 16. At the same time, the plastic parts 3,14,4 are guided in the correct position by the • · * I .. stack.

• · · • · · 25

With the structure of the end bracket shown, the rope handle 6 can be used as a rivet. «· ·. ·: ·. • Threaded single-strand steel wire, which is durable even in • corrosive environments.

In the illustrated embodiments, the body parts and the plastic parts are joined together by a single clamping screw 5, the thread of which engages the threaded hole 15 of the body part 2. (Fig. 6) and the head pressed against the second frame member 1. Naturally, longer sections in the traction direction and two successive clamping screws 5 can also be used.

· • 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ·

Claims (9)

107652 A plastic part 5 (3, 4) between the body parts of an insulated overhead line cable, in particular a hanging twist cable end having two metal frame parts (1, 2), with tongue shapes (10) for receiving the wire ends of the plastic parts (3, 4), a clamping screw (5) for clamping the body members (1, 2) and the plastic parts (3, 4) therebetween to lock the ends of the conductors between the plastic parts, and a tongue (6) associated with the holder for engaging the holder; 10, or similar fastener, characterized in that the two frame members (1, 2) project a handle fastening lug (11, 12) with an elongated locking hole (9) of variable width, so that the ends of both arms of the handle (6) thickeners (7) dimensioned relative to the locking holes (9) such that they only fit through the locking holes at their wider end, and that the the clamp clamps the crotch arms against the mounting lugs (11, 12). End holder according to Claim 1, characterized in that the locking holes (9) taper towards the outer ends of the mounting lugs (11,12) and that the handle (6). the ends of the arms are bent to direct the ends away from or towards each other. • · · · · · · · · · · · · · · · · · · End holder according to claim 1 or 2, characterized in that the plastic parts (3, 4) resting against the body parts (1,2) are wedge-shaped in the pulling direction of the end holder, so that the plastic parts (3, 4) expand towards the pulling handle. (6) and that ♦ · · 25 the through hole (16) of the clamping screw (5) is elongated in the pulling direction. • «· • · · · · · End bracket according to one of Claims 1 to 3, characterized in that the body parts (1, 2) and the plastic parts (3, 4) are joined together by a single clamping screw (5), • · ♦. ···. having a thread engaging in the threaded hole (15) of one frame (2) and having a base • · 30 pinched against the other frame (1). • · · • · · ··· ♦ End bracket according to one of Claims 1 to 4, characterized in that for the passage of the clamping screw (5) on one side of the hole (16) in the plastic part (3,4) there is a protruding collar (17) and on the opposite side of the hole (16). a corresponding recess (18) for receiving the collar (17) of the adjacent plastic part. End bracket according to claim 1 or 2, characterized in that the drawing strap (6) is a single-stranded stainless steel thread. End bracket according to one of Claims 1 to 6, characterized in that between the two plastic parts (3, 4) there is a third plastic part (14), each of which has opposite grooves (10) and two elongated holes (16) in the pulling direction. for passing through the clamping screw (5). End bracket according to Claim 3 or 7, characterized in that the clamping screw through hole (16) has a transverse bracket (19) which holds the clamping screw (5) at one end of the clamping screw until the bracket (19) is exposed to the clamping force. breaks and the body parts (1, 2) slide towards the thicker end of the wedge-shaped plastic parts (3, 4). End bracket according to Claim 1,2 or 6, characterized in that the fastening lugs (11, 12) have recesses (13) for the thickening of the ends of the handle. for receiving (7) in the region of the narrower end of the locking holes (9), and that the fastening lugs (11,12), the recesses (13) and the locking holes (9) are so spaced and shaped that not removable. · • ♦ ♦ · · ♦ ♦ · · · 107 107 107 107 107 107 107 107 107 107 107 107 107 107 107 107 107652 1. Ändhällare för en isolerad luflledningskabel, särskilt för en tailgspiralled-Ning, vilken hallare omfattar tva stomdelar (1, 2) av metal, mellan stomdelarna 5 plastdelar (3, 4) med skarade utformning (10) för mottagning av ledningens (3, 4), en spännskruv (5) för pressning av stomdelarna (1, 2) och mellan dessa belägna plastdelar (3, 4) mot för att läsa ledningarnan plastdelarna, samt en account hallaren ansluten drag-bygel (6) ) med vilken hallaren kan bringas att gripa in i en fästkrok eller motsva-10 rande fäste i en vägg eller pelare, spine dnav, att frän Bada stomdelarna (1, 2) utskjuter bygelns fästbeslag (11,12) med ett längsträckt, i bred varierande läsningshäl (9), att bygelns (6) Bada grenars ändar uppvisar för-tjockn Ingar (7), som i förhällande account läsningshälen (9), and dimensions of the att de passar genom näsningshälen are vid deras bredaste crane, och att 15 bygelns (6) egenspänning pressar bygelns grenar mot fästbeslagen (11, 12). 2. The patent patent 1, the packing box (9), the packing box (11, 12) the packing box and the packing box (6) the packing box for the packing box. • 20 * ·· · 3. Ändhällare enligt patentkravet 1 eller 2, kanknetecknad därav, att de mot • · ·: stomdelarna (1,2) anliggande plastdelarna (3, 4) i ändhällarens dragriktning and m kilformiga ä, att plastdelarna (3) , 4) avsmalnar mot dragbygeln (6), och att • · · * ·:: spännskruvens (5) genomgängshäl (16) i dragriktningen är längsträckt. • · · * ♦ · * 25 4. Ändhällare enligt avgot av patentkraven 1-3, stump nose därav, att stom- • delarna (1,2) and plastdelarna (3, 4) and moss spatula screw (5), • ♦ *; · * stalk gängor stär i ingrepp med ett gänghäl (15) i stomdelen (2) och interests är spännt mot stomdelen (1). 30 ♦ 5. Ändhäller enligt face av patentkraven 1 -4, kännetecknad därav, att för spännskruvens (5) genomic game uppvisar en bindan av vote (16) i plastdelen (3, 107652 4. en utskjutande krage (17) och hälets (16) motsatta sida head motsvarande stäl en en fördjupning (18), som mottar den intilliggande plastdelens krage (17) 6. Ändhallare enligt patentkravet 1 eller 2, hinges därav, att dragbygeln 5 (6) en ensträngad Trad av rostfritt stäl. enligt nagot av patentkraven 1 -6, kännetecknad därav, att mel-lan de tvä plastdelarna (3, 4) anordnats en tredje plastdel (14), stalk mot-stäende ytor uppvisar tvä skärade utformningar (10) och mellan dem i dragrikt- 10 and länststräckt shark (16) för spännskruvens (5) genomgäng 8. Ändhallare enligt patentkravet 3 eller 7, kännetecknad därav, att spännskruvens genomgängshäl (16) uppvisar en tvärställd kam (19), som Haller spänn-skruven (5) genomgängshälets (16) ena änd a, tills palm (19) under inver- k kan av spännkraften brister och stomdelama (1,2) far glida mot de kilformiga plastdelarnas (3,4) tjockare ändar. 9. Ändhallare en patent patent kravet 1, 2 eller 6, kännetecknad därav, att fäst-beslagen (11, 12) uppvisar fördjupningar (13) för mottagning av förtjockningar-: 20 na (7) i bygelns ändar inom läsningshälens smalare al beslagen (11, 12), fördjupningarna (13) och läsningshälen (9) sinsemellan är • · · anordnade och formade, att i en account användningsläge ihopsatt ändhallare bygeln (6) inte kan lösgöras frän sitt läge. · I I I • • I I I I I m m m m m m m m m m m m m m m m m m m m m m m m m m • «· • · · ·