JPH0123858Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Background and Purpose of the Invention] The present invention relates to an improvement of a terminal anchoring device for a trolley wire having a support wire.

Conventionally, in this type of restraining device, a type using a cotter pin has been adopted, and its function is widely recognized as being sufficiently satisfactory.

However, due to the use of Kotturpin,
This method involves untwisting the stranded wire that is the support wire of the trolley wire, placing the loose wires in the designated grooves of the overhead wire tie-down fitting, and driving the cotter pin into the hold-down fitting to hold it in place using a wedge effect. , it requires a lot of man-hours and time, and the workability is not good.

This deterioration in workability is particularly noticeable in the construction of cranes, hoists, etc. that require work at heights, and the number of parts handled on site is large, making it uneconomical.

Therefore, the same applicant as the present inventor has devised an improvement measure that allows the trolley wire to be held in a predetermined position by simply inserting the support wire first. (Unexamined Japanese Patent Publication No. 57-
Please refer to the back of No. 175436. ) The proposed anchoring device has a structure in which a spring is continuously loaded together with a wedge into a weight-shaped metal fitting through which a support wire can be inserted, and the rear end of the metal fitting is covered with a lid to prevent the spring from slipping out. Therefore, once the support wire is inserted, it is grabbed by the wedge piece and it is difficult to remove it. It should be noted that it is possible to remove the support wire by removing the lid, but in that case, the lid material will have to be removed while being compressed by a spring, so the spring will jump out forcefully to the outside the moment the lid is removed. There were problems such as powder being lost during the process, and the structure did not take into account the possibility of removing the support wire.

Once the trolley wire is inserted and held in place by the wedge effect, it may become worn out due to brush sliding during use, or the insulating cover that protects the trolley conductor may be damaged, requiring replacement. At that time, when performing maintenance work such as replacing the trolley wire with a new one, it was difficult to reuse such a tethering device.

In view of the above-mentioned conventional problems, the present invention not only significantly reduces the number of assembly parts to be handled on-site and contributes to improved work efficiency, but also allows the terminal of the trolley wire to be released with simple and safe procedures. The object of the present invention is to provide a trolley wire terminal retaining fitting.

[Summary of the idea]

As shown in the accompanying drawings, the trolley wire end clasp of the present invention has a cylindrical body 10 that allows the support wire of the trolley wire to be inserted and communicates in the axial direction, and has a support wire insertion hole 11a at the tip. A sleeve 11 having a tapered hole 11b whose diameter gradually increases toward the rear end side, and a cylindrical portion 12 whose one end is screwed onto the circumference of the rear end side of the sleeve and is formed to extend rearward.
A, and a pair of connecting arms 12D, 12D connected to the cylindrical portion and extending rearward while being spaced apart from each other by an interval narrower than the inner diameter of the cylindrical portion, and a recessed notch 50 between the two arms.
A split wedge piece 20 is loaded into a tapered hole in the sleeve 11, and a split wedge piece 20 is inserted into the cylindrical portion 12A of the cap 12 with an outer diameter smaller than the inner diameter of the cylindrical portion. A stop ring 70 is secured to a shoulder portion 12C formed at a portion connected to the connecting arms 12B, 12B on the rear end side of the cylinder portion.
and a coiled spring 30 having a diameter slightly smaller than the interval between the connecting arms 12B, 12B.
It is characterized in that one end thereof is received by the stop ring 70 and the other end is arranged so as to be linked to the rear end portion of the split wedge piece 20.

〔Example〕

Fig. 1 shows an outline of the terminal retaining part of the trolley wire, in which the long tightening bolt 2 protruding from one end of the insulator is connected to the bracket (not shown) of the support part.
A retaining device 3 rotatably connected by a clevis pin 4 to a connecting fitting 3 protruding from the other end of the insulator 2 is provided, and the end of the trolley wire 6 is stripped off in stages to this device 4. By attaching the exposed support wire end 6a, the end of the trolley wire is secured. Note that 7 indicates an insulating cover.

FIG. 2 shows an embodiment of the present invention in the restraining device 5. As shown in FIG.

The detention device 5 includes a cylindrical body 10 forming the outer shell of the device,
Split wedge piece 20 and spring 30 loaded therein
The main parts are:

The cylindrical body 10 is composed of a sleeve 11 and a cap 12, and one of the sleeves 11 has an insertion hole 11a at its distal end facing toward the trolley wire.
A tapered hole 11b is formed whose diameter gradually increases from the hole 11a toward the rear end, and the maximum diameter opening of the hole 11b is located at the rear end. In addition, a male thread is formed on the circumference of the rear end.

The other cap 12 forms a cylindrical portion 12A whose inner diameter is approximately equal to the outer diameter of the sleeve and whose inner surface on the tip side is internally threaded in a length extending from the tip to approximately one-half in the axial direction. With,
A pair of connecting arms 12B, 12B are formed in series at the rear end of the cylindrical portion 12A, spaced apart from each other at an interval narrower than the inner diameter of the cylindrical portion 12A, and extending toward the rear end. Concave cutout 5
It is set to 0. In addition, 12D represents each connecting arm 12
This is an insertion hole through which a clevis pin (see 4 in FIG. 1) formed in B is passed laterally.

However, the sleeve 11 and cap 12 are
The male thread on the rear end side of the former is screwed into the female thread on the front end side of the latter so that they are combined as a series, so that the cylindrical portion 12A of the cap 12 extends from the rear end side of the sleeve 11. Reference numeral 40 denotes a set screw that is threaded radially through the cylindrical portion 12A of the cap 12 and has its tip abutted against the male threaded portion of the sleeve 11, and after the sleeve 11 and the cap 12 are assembled as a series, they can rotate relative to each other. This helps prevent loosening.

The split wedge piece 20 is made by assembling halves in the shape of a weight, each of which has a tapered outer surface whose diameter gradually decreases toward the tip, and forms a through hole 20a for the support wire in the combined surface. Thus, the split wedge piece 20 is pushed into the tapered hole 11b from the rear end side of the sleeve 11 and is loaded, so that the outer taper and the surface of the tapered hole 11b match to produce a wedge effect. Deployed.

The spring 30 allows the support wire 6a of the trolley wire to pass through the spring 30, and is coiled with a diameter slightly smaller than the distance between the connecting arms 12B, 12B. The shoulder portions 12C, 12C provided at the rear end side of the cylindrical portion 11A are connected to the connecting arms 12B, 12B, and are received by a stop ring 70 having an outer diameter smaller than the inner diameter of the cylindrical portion 12A. The end thereof is connected to the rear end surface of the divided wedge piece 20 loaded in the sleeve 11 via a bush 60.

The device whose parts are shaped as described above is assembled in the following manner.

First, the split wedge piece 20 is loaded from the rear end side into the sleeve 11 which has been unscrewed from the cap 12, and then the coiled spring 30 is inserted into the cylindrical portion 12A of the cap 12 so that one end thereof is attached to the stop ring 70.
The tip of the cylindrical portion 12A of the cap 12 loaded with the spring 30 is screwed onto the periphery of the rear end of the sleeve 11.
The sleeve 11 and the cap 12 are connected as a series, and the tip of the spring 30 loaded in the cylindrical portion 11A is connected to the rear end of the split wedge piece 20 loaded in the sleeve 11 via a bush 60. let

Then, by adjusting the overlapping length in the axial direction due to the threaded engagement of the sleeve 11 and the cap 12, the coiled spring 30 is compressed, and the split wedge piece 20 is moved into the sleeve 11 based on the elastic force accompanying the compression of the spring. the tapered hole 11b.

Finally, when the sleeve 11 and the cylindrical portion 11A of the cap 12 do not need to be screwed together and moved forward or backward, the sleeve 11 is tightened by tightening the setscrew 40 threaded through the cylindrical portion 11A to press the sleeve 11. 11 and cap 12 are prevented from relative rotation and are integrated.

The device 5 assembled in this manner can be assembled in advance at the factory and does not require assembly work at the construction site. That is, according to the anchoring device 5 configured as described above, the support wire end 6a exposed at the end of the trolley wire 6 by stripping the step is inserted into the sleeve 11 through its insertion hole 11a, and the split wedge piece 20 is inserted into the sleeve 11 through its insertion hole 11a. This is because the trolley wire can be placed in a restraining position simply by pushing it toward the rear end and inserting it into the through hole 20a in the loosened split portion. In the restraining device into which the end of the support wire is inserted, the pair of connecting arms 12B,
Insert the insulator side connecting fitting 3 into the recessed part 50 between 12B, and connect the pin holes and the connecting arm holes 12D, 12D.
When the clevis pin 4 is passed through the clevis pin 4 and the trolley wire 6 is in the retained state, the support wire end 6a tries to come out from the cylinder 10 due to the tension in the trolley wire 6.
The split wedge piece 20 that was pushed in at that time is pushed into the tapered hole 11b in the sleeve 11 due to the elastic force accumulated in the coil spring 30.
As a result, a clamping force is applied to the divided surface portion, resulting in a so-called gripping state in which the inserted support wire end 6a is strongly clamped, thereby securing the support wire. Further, by further pushing the support wire end 6a that has passed through the split wedge piece 20 and extending it through the coil-shaped spring 30 to near the bottom of the recessed cutout 50, the insertion state of the support wire 6a into the cylinder body 10 can be changed. This makes it possible to confirm this in the holding position.

Furthermore, in addition to speeding up the anchorage as described above, it is also very easy to remove the support wire once inserted. That is, after loosening the set screw 40, the sleeve 11 is rotated to shallowly screw the cap 12 into the cylindrical portion 12A, thereby releasing the compressive force on the spring 30 and releasing the split wedge piece 20. The connecting arm 12 is removed from the inside of the cylindrical portion 12A by dissipating the pressing force on the sleeve 11 and rotating the stop ring 70 so as to lift it off the shoulder portion 12C and come out of the plane of the shoulder portion 12C.
If the support wire terminal 6a that is taken out and then inserted into the recessed part 50 between B and 12B is pushed in the direction of insertion, a coil-shaped wire is formed which is not subjected to compressive force and whose rear end is released from the locked state. The spring is the cylindrical part 12
A is pulled out between the connecting arms 12B, 12B, and accordingly, the split wedge piece 20 is moved backward from the tapered hole 11b of the sleeve 11, loosened to the extent that the split surfaces are separated, and connected to the support wire end 6a. The gripping force is deenergized, and in this state, the support wire end 6a can be pulled out in front of the sleeve 11.

This is extremely effective in facilitating maintenance work, such as when replacing the installed trolley wire 6 with a new one when it is damaged.

Also, after inserting and removing the hot support wire, do the opposite procedure to the above, that is, retreat and remove the connecting arm.
Push the spring 30 protruding between 2B and 12B forward, push the wedge piece 20 into the sleeve 11, and insert the removed stop ring 70 into the cylindrical part 12A between the connecting arms 12B and 12B and insert it into the shoulder part 12C. It is sufficient that the sleeve 11 is set in a locking position, and then the sleeve 11 is screwed into the cylindrical portion 12A of the cap 12, the spring 30 is compressed, and the wedge piece 20 is pressed against the tapered hole 11b of the sleeve 11. , the mooring device can be reused as is by simply replacing the trolley wire.

The sleeve 11, cap 12, etc. are generally made of metal, but in some cases they may be made of reinforced plastic.

[Effect of idea]

As is clear from the above explanation, the original purpose of the trolley wire end anchoring device of the present invention is to provide a trolley wire end anchoring fitting that can significantly reduce the number of assembly parts handled on site and contribute to improving work efficiency. is fully achieved. In addition, if you want to release the tension of a trolley wire that has been inserted, you can easily and safely remove the support wire of the trolley wire and replace the trolley wire. It also has the effect of facilitating maintenance work, such as being able to be reused.

[Brief explanation of the drawing]

The attached drawings show an embodiment of the trolley wire end anchoring device according to the present invention, FIG. 1 is an explanatory diagram showing how the anchoring device is used, FIG. 2 shows a specific example of the anchoring device, and A is a half A cross-sectional explanatory diagram shown in a cross-sectional state,
B is a right side view, and C is a plan view. In the figure, 10 is a cylindrical body, 11 is a sleeve, 11a is an insertion hole, 11b is a tapered hole, 12 is a cap, 12A is a cylindrical portion, 12B is a connecting arm, 30 is a coiled spring, and 50 is a concave cutout.

Claims (1)

[Scope of utility model registration request] In a device for securing an end of a trolley wire having a support wire, the cylinder body 10 which allows the support wire to be inserted and communicates in the axial direction has a support wire insertion hole 11a at the tip and extends from the hole to the rear end side. Sleeve 11 having a tapered hole 11b whose diameter gradually expands
and a cylindrical portion 12A having one end screwed onto the circumference of the rear end side of the sleeve and extending rearward thereof, and extending rearward while being connected to the cylindrical portion and spaced apart from each other at an interval narrower than the inner diameter of the cylindrical portion. Formed pair of connecting arms 12
D, 12D and a cap 12 with a concave notch 50 between the two arms.The split wedge piece 20 is loaded into the tapered hole in the sleeve 11, and the cylindrical portion of the cap 12 is Within 12A,
A stop ring 70 having an outer diameter smaller than the inner diameter of the cylindrical portion is provided on the rear end side of the cylindrical portion and is latched to a shoulder portion 12C formed at a continuous portion with the connecting arms 12B. , 12B is disposed such that one end thereof is received by the stop ring 70 and the other end is linked to the rear end of the split wedge piece 20. Features: Trolley wire terminal retaining device.