JP2954315B2 - How to connect linear objects - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a method for connecting a linear body, and more particularly to a method for connecting a linear body such as an overhead electric wire, a steel stranded wire, or a wire rope.

(Prior art) Conventionally, there are two connection methods for connecting and fixing the ends of a wire such as an overhead electric wire, a steel stranded wire, a wire rope to a support such as a telephone pole, or for connecting the wires together. The first method is to connect using metal fittings such as compression sleeves and bolted connectors, but it has the drawback that it takes time to work or that the linear body stretches out of the metal fittings over the years. . The second method is a method in which a long spiral is wound around a linear body and connected, and even if the linear body stretches, the spiral body follows and stretches, and has the advantage of continuing tight connection. It has been awarded a number of ways around the world.

However, recently, there has been a tendency for all dangerous work to be performed using work robots (manipulators) in order to ensure worker safety and reduce work time, and the spiral method is extremely difficult for manipulators.
It has been desired to develop a connection tool and a connection method that can be handled by a manipulator while taking advantage of the characteristics of the spiral method (the spiral expands as a load is applied and the linear body is firmly gripped).

(Problem to be Solved by the Invention) As a result of the present inventor working on the above-mentioned problem, the winding operation of a spiral without any difficulty for a dexterous person is too complicated for a manipulator at present. Work, and for the time being,
We concluded that we should avoid the winding operation while using the long spiral wire bundle and concentrate on obtaining the same effect as winding the spiral.

The above idea of the present invention is based on a new connecting method of the connecting device, which is filed by the present applicant in Japanese Patent Application No. 2-258265 on Sep. 26, 1990. That is, this connecting tool is designed to be slightly larger than the outer circumference of the linear body, contrary to what was previously designed so that the inner diameter of the long spiral wire bundle was slightly smaller than the outer diameter of the known linear body. Then, after the looseness adjustment of the linear body is finished by being wound around the linear body in a loosely fitted state, by pressurizing and compressing the pressing means mounted on the outer periphery of one end of the long spiral wire bundle. And consolidating the long helical wire bundle immediately below the pressurizing means into a linear body to impart an initial contact frictional force necessary for connection between the long helical wire bundle and the linear body, thereby providing a tension applied to the linear body. And the frictional force cooperate with each other to extend the helical pitch of the long helical wire bundle in the longitudinal direction so that the portion other than the pressurizing means of the long helical wire bundle is also closely related to the outer periphery of the linear body in the long helical wire bundle. This is to maintain the original connection effect. However, within the scope of this prior application, the method of winding a long spiral wire bundle around a linear body as in the past was adopted, so that it was still unsuitable for the automatic operation by the described manipulator. The inventor of the present invention has developed the method of use so that the connecting device of the prior application can be adapted to the working capability range of a manipulator currently available on the market, and has realized the method of the present invention. This use method is not to wind the long helical wire bundle around the linear body, but to arrange it inside the long helical wire bundle which is arranged in a substantially hollow cylindrical shape, although the structure is basically the same as the connecting device of the prior application. The reverse idea of inserting the linear body from one end to the other end in the empty space was adopted, and following this insertion, the pressure metal fitting already attached to the outer periphery of the end portion of the long spiral wire bundle was applied substantially in the centripetal direction. By adding a simple operation of compression and compression, the connection can be realized under full automatic operation by a manipulator. The connector used in the method of the present invention has been developed to further develop the connector of the prior application and has made some contrivances to facilitate the operation of inserting the linear body into the hollow space.

(Means for Solving the Problems) In order to achieve the above object, a method for connecting a linear body according to the present invention includes the steps of: forming a spiral inner diameter slightly larger than an outer diameter of a linear body to be connected by bending a metal wire; A long spiral element wire having a long spiral element wire is formed, and a number of the long spiral element wires are appropriately arranged and arranged to form a hollow cylindrical long spiral element wire bundle having a hollow space for inserting a linear body inside. Attachment of the pressure fitting to the outer periphery of one end of the long spiral wire bundle to constitute a connector, the linear body is inserted into the hollow space of the long spiral wire bundle from one end of the press fitting side,
And, by pressing the press fitting from the outer periphery, the long spiral wire bundle immediately below the press fitting is brought into close contact with the outer periphery of the linear body, and the linear body is stretched by a tensile load via the connecting tool. , Consisting of

In the case of the press fitting, the press fitting receives the wire end portion of the long spiral wire bundle along the inner peripheral surface of the insertion hole of the press fitting and forms the long spiral wire bundle. One end of the hollow space is arranged coaxially with the insertion hole to form a connector.

(Operation) In the present invention, since the diameter of the hollow space inside the hollow cylindrical long spiral wire bundle is slightly larger than the outer diameter of the linear body as described above, pressurization represented by a ring-shaped compression sleeve is performed. Inserting a linear object into a hollow space inside a long spiral wire bundle with metal fittings attached to the outer periphery is a task without any work for humans, and it is a simple one-dimensional one-way operation for a manipulator. Only. In the subsequent compression step, in the conventional compression sleeve, the gripping force of the linear body is obtained only by the frictional force generated accompanying the compression. Times, 30
Had to be compressed many times,
In the method of the present invention, the compression of the press fitting is a trigger for stretching the spiral to generate a gripping force, so that a single light compression is sufficient.

 Hereinafter, the method of the present invention will be described in detail with reference to examples.

(Example 1) (a) Corresponding drawings: FIG. 1, FIG. 2 (A) (B), FIG. 3 (A) (B) and FIG. 4 (A) (B).

(B) Usage: Copper wire 60mm ² (2.0mm x 19 strands, outer diameter
(C) Configuration of the connector: pitch 2.6 copper alloy wires 10 with a diameter of 2.6 mm
0mm, spiral inner diameter 10.5mm, spiral outer diameter 15.7mm, length 280mm into a long spiral shape, dozens of these, a small gap between the lines (this small gap When tension is applied to the body, each of the long spiral wire bundles is allowed to contract in the centripetal direction) and twisted to form the long spiral wire bundle 1.

A press fitting 2 is fixed to one end of the long spiral wire bundle 1. The press fitting 2 has a through-hole 21 through which the end of the long helical wire bundle and the electric wire Ca can be inserted coaxially in the form of a cylindrical sleeve having a mouthpiece shape. The corresponding end of the long spiral wire bundle 1 is inserted into the insertion hole 21, and as shown in FIGS. 2 (A) and 3 (B), the hollow cylindrical long spiral wire bundle 1 is formed. Insert the end of the wire 10 into the insertion hole of the pressure fitting 2.
The hollow space 11 of the long spiral wire bundle is arranged substantially coaxially with the insertion hole 21 by being received along the inner peripheral surface of the wire 21.

The press fitting is disposed so as to protrude in the longitudinal direction from the end of the long spiral wire bundle, and an open end thereof forms a receptacle for the linear body. The opening end of the pressure fitting 2 communicates with the insertion hole 21 to form a receptacle 22 that spreads in a bell-mouth shape from the small diameter portion as shown in FIG. This facilitates the insertion of the inner long spiral wire bundle into the hollow space 11 at the end.

On the other hand, in this example, the end surface of the anchoring base 3 is fixed to the other end of the long spiral wire bundle 1 by welding.

(D) Connection method: At the wire extension site, the electric wire Ca is inserted into the hollow space 11 of the long spiral wire bundle 1 by pushing the electric wire Ca from the receptacle 22 of the press fitting 2 of the connecting device having the above configuration. Then, while the retaining ring 31 of the retaining base 3 is hooked on a glass (not shown), a tension is applied to the electric wire Ca by applying a tensioner to the electric wire Ca, and the looseness of the stretched electric wire is given. After the adjustment, the positioning of the connector with respect to the electric wire is performed. In this state, when the press fitting 2 is pressed and compressed in a substantially centripetal direction by a compressor and a die, the electric wire Ca and the long spiral wire bundle are tightened by the press fitting 2 as shown in FIG. 1 is held and fixed.

Subsequently, when the wire tensioner is removed, as shown in FIG. 2 (B), when the press fitting 2 of the connecting tool is pressurized and compressed in a state where a tensile load is applied to the electric wire Ca, the two work together. Each pitch of the long spiral wire bundle 1 is stretched in the longitudinal direction to generate a sufficient contact pressure and frictional force between the long spiral wire bundle 1 and the outer periphery of the electric wire Ca. Thereby, an electric wire having an appropriate degree of sag can be stretched.

As is apparent from this connection method, according to the method of the present invention, connection is only two operations (insertion of the electric wire Ca and pressurization of the press fitting 2) (adjustment of the sag is the same as the conventional one). Both operations can be performed quickly and accurately under full automatic operation.

(Example 2) (a) Corresponding drawings: FIGS. 5, 6 (A), (B) and 7
Figure (A) (B) (b ) Using Application: Steel twisted 30 mm ² (present 2.3 mm × 7 twist, outer diameter
(6.9mm) Terminal retention (c) Configuration of connecting device: steel wire 10 with a diameter of 2.48mm and pitch of 75m
m, helical inner diameter 7.7mm, helical outer diameter 12.66mm, length 1000mm into a long spiral shape, as shown in Fig. 5 and Fig. 6 (A),
After the four helical strands 10 are twisted, they are bent from the middle part to form a retaining loop 12, and then returned while twisting to form a hollow cylindrical long helical strand bundle 1. As shown in FIGS. 5 and 6 (B), an aluminum C-channel material (cylindrical body having a cylindrical side portion cut out) is used as the pressure fitting 2, and the above hollow cylindrical long spiral element is used. The end of the wire 10 of the wire bundle 1 is received along the inner peripheral surface of the channel material of the press fitting 2, and the end of the channel material is extended so that it slightly projects from the end of the long spiral wire bundle 1. The end of the spiral wire bundle 1 is overlaid to form a connector.

(D) Connection method: the retaining loop 12 is the retaining ring of the first embodiment.
Although the wire Ca is replaced with the wire 31, the electric wire Ca is inserted into the hollow space 11 of the long spiral wire bundle 1 of the connector 1 from the inside of the receptacle 22 at one end of the C-shaped press fitting 2, After adjusting the sag of the electric wire Ca and adjusting the position of the connector 1 as shown in 1, the C-channel press fitting 2 is pressurized and compressed.

 Other details are the same as in the first embodiment.

(Embodiment 3) (a) Corresponding drawing: Fig. 8 (b) Usage: Interconnection of copper single wire 5mm (c) Configuration of connector: 2.3mm diameter copper alloy strand 10 pitch 6
5mm, spiral inner diameter 5.8mm, spiral outer diameter 10.2mm, length 400mm, formed into a long spiral, as shown in Fig. 8, 3 × 2
The twisted braid is arranged in a hollow cylinder and the first
Is formed, the long spiral wire is extended in a nonconformity state (non-coaxially), and further, the coaxial second hollow cylindrical long spiral wire bundle 1 'is formed. Forming the first
Of the second long spiral wire bundle 1 'together with the end of the long spiral wire bundle 1
A pressure fitting is also attached to the outer periphery at the end. As shown in FIG. 8, a press fitting 2 made of a copper cylindrical sleeve similar to that of the first embodiment is provided at each end of both long spiral wire bundles 1, 1 '.
2 was attached, and it was set as the connection tool which attached the pressure metal fitting to both ends.

(D) Connection method: Two single copper wires Ca, Ca are inserted into the connection tool from inside the sockets 22, 22 of the pressure fittings 2, 2 from opposite directions, and the front ends of the long spiral wire bundles 1, 1, respectively. After exposing from the end of '′ and adjusting the required slackness and position, the pressure fittings 2 and 2 were pressed and compressed. The two copper single wires Ca, Ca were connected by a connector, and could be stretched by pulling each other.

(Embodiment 4) (a) Corresponding drawing: FIG. 9 (b) Usage: The copper single wire of Embodiment 3 is connected substantially coaxially and connected.

(C) Configuration of the connecting tool: a pair of identical pressurizations at both ends of the long spiral wire bundle using the cap-like press fitting 2 at the opposing position in the first embodiment in place of the anchor 3 in the first embodiment. Hardware 2,2
Was attached to make a connection tool. Others are the same as the first embodiment.

(D) Connection method: A pair of the same electric wires Ca, Ca are inserted into the fittings from the respective receiving ports 22, 22 of the press fittings 2, 2 in facing relation to each other, and the looseness and the position are adjusted in a state where both are abutted. After that, the two pressure fittings 2, 2 are pressurized and compressed to complete the connection.

In the present invention, the insertion of the long helical wire bundle of the press fitting and the insertion of the linear body and the pressurization of the press fitting may be performed at the work site where the linear body is to be stretched. A press fitting is attached to the end of the long spiral wire bundle,
The operation of inserting the linear body and pressurizing the press fitting may be performed at the site where the linear body is stretched.

(Effects of the Invention) Regardless of the conventional connection method such as compression and bolting and winding of a spiral wire bundle, the work is complicated and particularly difficult for a manipulator for the time being, it is difficult work to solve at all. According to the method of the present invention, the connecting step is only two steps of the step of inserting the linear body into the hollow space of the long spiral wire bundle and the step of compressing the compression sleeve, and both are easy operations for the manipulator. Manipulator tips suitable for this process have already been developed and put to practical use in the industry.

Further, the press fitting of the method of the present invention is a trigger for extending the spiral to exert the gripping force of the linear body, and the sleeve is lightweight because it does not attempt to grip the linear body only by the force of the sleeve itself. It is small and the number of compressions may be one.

Furthermore, the longer the spiral load is applied to the linear body, the longer the spiral wire is stretched, and the feature of the spiral connection method of holding the linear body firmly is maintained.

As described above, according to the method of the present invention, as a method of connecting a linear body using a long spiral wire bundle, a method which provides an excellent advantage of realizing the automation of the connection method by changing the idea from the conventional method. It is.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a first embodiment of a connecting device for carrying out the method of the present invention, and FIG. 2 (A) is a central sectional view of the pressing device shown in FIG. 3B shows a state in which tension is applied to the linear body after pressing, FIG. 3A is a cross-sectional view taken along the line XX of FIG. 2A, and FIG. Figure (A)
4 (A) is a sectional view taken along the line YY of FIG.
FIG. 4 (B) is a sectional view taken along the line YY in FIG. 2 (B), FIG. 5 is a perspective view showing the second embodiment, and FIG. 6 (A).
FIG. 6 shows a non-compressed state of the press fitting in the XX line sectional view of FIG. 5, and FIG. 6 (B) shows the same non-compressed state in the YY line sectional view of FIG. FIGS. 5A and 5B are cross-sectional views taken along the lines XX and YY in FIG. 5, showing a state in which the pressure fitting is compressed while tension is applied to the electric wire, and FIG. 8 shows a third embodiment. FIG. 9 is a perspective view showing a fourth embodiment,
In the above, both the first and second embodiments show an example of terminal detention, the third embodiment shows an example of branch connection, and the fourth embodiment shows an example of butt connection. (Description of Signs) 1 ... Long spiral wire bundle, 2 ... Pressure fitting, 3 ... Retention base, 10 ... Strand, 21 ... (Linear) insertion hole, 22 ... Receptacle, Ca ... wire.

Claims (6)

(57) [Claims] A long spiral element wire having a spiral inner diameter slightly larger than the outer diameter of a linear body to be connected by bending a metal wire is formed. Forming a hollow cylindrical long helical wire bundle having a hollow space for inserting a linear body into it; attaching a pressure fitting to an outer periphery of an end portion of the long helical wire bundle; The press fitting receives the wire end of the long spiral wire bundle along the inner peripheral surface of the insertion hole of the press fitting, and coaxially connects the hollow space at one end of the long spiral wire bundle with the insertion hole. To form a connecting member, to insert a linear body from one end of the pressing metal fitting into the hollow space of the long spiral wire bundle, and to apply the pressing metal fitting from the outer periphery. By pressing the long spiral wire bundle immediately below the press fitting to the outer periphery of the linear body,
Stretching the linear body by a tensile load via the connecting tool. 2. The long spiral wire bundle is formed by bending each long spiral wire substantially from an intermediate portion, and the other end of the long spiral wire bundle is formed with a loop for retaining by folding back. The connection method according to claim 1, wherein the connection method is performed. 3. The method according to claim 1, wherein the long spiral wire bundle is a first spiral spiral wire bundle.
Are formed by coupling the long spiral wire bundle and the second long spiral wire bundle, and press fittings are attached to the ends of the first long spiral wire bundle and the second long spiral wire bundle, respectively. , Separate linear body
In the hollow space of the long spiral wire bundle and the second long spiral wire bundle,
2. The connecting method according to claim 1, wherein two linear bodies are inserted through the end portions to which the press fittings are attached, and are stretched through the connecting members. 4. The pressure fitting forms a substantially cylindrical sleeve,
4. The connecting method according to claim 1, wherein an opening end of the press fitting protrudes in a longitudinal direction from the end of the long spiral wire bundle to form a receiving port for the linear body. 5. The connection method according to claim 4, wherein the inside of the receptacle at the open end of the pressure fitting has a bell-mouth shape. 6. After the end of the linear body is inserted into the hollow space of the long helical wire bundle of the connector, the slackness of the linear body stretched by a wire stretching machine is further adjusted; The connection method according to claim 1, further comprising positioning the connection tool with respect to the linear body, and thereafter pressurizing the pressure fitting.