JPH0123859Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Background and Purpose of the Invention] The present invention relates to a fastening fitting for fastening an insulated contact wire end portion to a support structure.

A contact wire terminal retaining device of the type using a turret pin is well known and its function is widely recognized as being fully satisfactory. However, due to the use of the turret pin, the tip of the stranded messenger wire, which is the contact wire core wire, is untwisted, the strands are placed in the designated groove of the overhead wire tie fitting, and the stranded wire is tightened using the wedge structure of the turret pin. However, the connection is troublesome and the workability is poor.
This is a big problem, especially in the construction of cranes, hoists, etc., which often involve work at heights, and the parts are relatively expensive and large in number, making it uneconomical.

The object of the present invention is to eliminate the drawbacks of the conventional retaining fittings and to provide an inexpensive retaining fitting for an insulated contact wire end that is highly workable and less prone to failure by combining simple parts.

[Summary of the idea]

The above object is achieved by a simple construction using a spring-biased wedge.

〔Example〕

The present invention will be explained below with reference to an embodiment shown in the drawings.

FIG. 1 is a partial cross-sectional view showing an embodiment of the present invention, in which a long bolt 2 having a spring 1 for engaging with a support structure and the other end of this long bolt 2 are embedded in one end. It also includes a molded insulator 3 into which an embedded metal fitting 4 is embedded at the other end, and a tightening metal fitting 6 that engages with this embedded metal fitting 4. The embedded fitting 4 has a female thread 5, and a tightening fitting 6 engages with this screw 5. A cross section of the tightening fitting 6 is shown in FIG.

In FIG. 2, the tightening fitting 6 includes a cap 8 having a male thread 7 at one end that engages with the female thread, and a sleeve 9 fixed to the other end of the cap 8.
This sleeve 9 has a tapered hole 10 into which a two or three piece wedge fitting 11 is inserted. This wedge fitting 11 is biased toward the tapered hole 10 by a spring 12 disposed between it and the bottom of the cap 8.

The core wire 15 of the insulated contact wire 14 is pushed into the wedge fitting 11 through the hole 13 of the sleeve 9 against the force of the spring 12. As a result, the wedge fitting 11 opens and accommodates the core wire 15. Upon completion of pushing, the wedge fitting 11 is pushed into the tapered hole 10 by the spring 12.
The core wire 15 is pushed in the direction of , thereby creating a wedge action, and the core wire 15 is tightened and fixed between the metal fittings 11 . In this state, a protective mold cover 16 is provided if necessary.

As described above, according to the terminal retaining fitting of the present invention, it is sufficient to simply insert the trolley core wire into the sleeve, and its workability is extremely high. As the tension applied to the contact wire increases, the tightening force by the wedge fitting increases accordingly.

Note that a split pin can be inserted into the engaging portion of the embedded metal fitting and the tightening metal fitting to prevent them from rotating. Further, instead of this threaded engagement, a pin may be inserted through the threaded engagement. Also, for the connection between the long bolt and the molded insulator, embed only the nut.
You can also put a long bolt into it.

[Effect of idea]

As is clear from the above explanation, according to the insulated contact wire terminal clamp according to the present invention, the terminal of the contact wire can be secured by simply inserting it, and the embedded fixture with a long bolt can be used. Since the insulator is assembled by screwing together the molded insulator and the tightening fitting, it is easy to work with and is inexpensive with few names due to the simple combination of parts, which is economically advantageous.

[Brief explanation of the drawing]

Fig. 1 is a partial sectional view of one embodiment of the present invention;
The figure is a cross-sectional view of a part thereof. 1... Spring, 2... Long bolt, 3... Molded insulator, 4... Embedded metal fitting, 5... Female thread, 6... Tightening fitting, 7... Male thread, 8... Cap, 9...
Sleeve, 10...Tapered hole, 11...Wedge fitting, 12...Spring, 13...Through hole, 14...Insulated contact wire, 15...Trolley core wire, 16...Protective mold cover.

Claims (1)

[Scope of utility model registration request] A long bolt that engages with the support and has a spring at one end, an insulating mold in which the other end of the long bolt is embedded in one end and an embedded fitting in the other end, and the insulating mold engages with the embedded fitting. a cap having one end screwed into engagement with the embedded fitting; a sleeve fixed to the other end of the cap and having an inwardly tapered hole and a trolley wire receiving hole; It consists of a multi-split wedge metal fitting that is inserted into this tapered hole and receives the trolley core wire in the center, and a spring member that biases this wedge metal fitting toward the tapered hole, and the trolley core wire is inserted into the receiving hole of the sleeve. An end clamp for an insulated contact wire that holds the end of the contact wire by inserting it into the wedge metal fitting through the insulated contact wire.