JP2010198917A - Sleeve compression device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce the size of a die to be exchanged during a compression connecting work of electric wires, and reduce its weight. <P>SOLUTION: A compression tool 10 that is equipped with an adapter housing portion 12 and a first die pressurizing mechanism 18, a first adapter 38 that is detachably set in the adapter housing portion and has on its surface a first die-support recessed portion 40 to detachably support the first die 34, the first die that is detachably set in the first die support recessed portion and has on its surface a sleeve-compressing recessed portion 36 which supports a sleeve 110 in order to be crimped to the end part of an electric wire 100, and a second die 54 that has on the bottom face a pinch crimping recessed portion 56 to pinch crimp the sleeve between the sleeve-compressing recessed portion and is pressurized by the first die by the first die-pressurizing mechanism in a state set in the compression tool, are equipped. At the first die support recessed portion, a detachment guide portion 42 is installed in order to support interchangeably and detachably a plurality of kinds of first dies having only different shapes of the sleeve-compressing recessed portions. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a sleeve compression device used when compressing and connecting an electric wire such as an overhead electric wire.

A compression connection is used to connect electric wires used for high-voltage and large-capacity electric lines such as overhead power transmission lines. For compression connection, the end of the wire that becomes the connection part is inserted into a sleeve or compression terminal and sandwiched between a pair of symmetrical compression dies, and pressure is applied from each compression die to compress the sleeve and compression terminal. It is made to connect with an electric wire.
Since the compression die used for this compression connection has a large weight of about 3 to 4 kg, various techniques have been proposed to reduce the weight. For example, in Patent Documents 1 and 2, the compression die is composed of an inner peripheral portion made of a high-strength iron-based material and an outer peripheral portion made of a lightweight aluminum material to reduce the weight of the compression die.

JP-A-7-302673 JP-A-8-213141

Here, as an example of the case where the electric wires are compression-connected, a case where the ends of two steel core aluminum wires (ACSR) are compression-connected using a sleeve will be described.
A steel core aluminum strand is comprised from the steel core wire arrange | positioned in the center part of an electric wire, and the aluminum strand wire which put together the multiple aluminum wire around the steel core wire. In order to compress and connect between the ends of two steel core aluminum wires, two steps are required: the steel core wire is compressed with a steel sleeve, and then the aluminum strand is compressed with an aluminum sleeve. When compressing the sleeve, a compression die corresponding to the sleeve diameter must be used. In the above example, since the diameters of the steel sleeve and the aluminum sleeve are different, it is necessary to replace the compression die set on the compression tool.
Even if the compression dies of Patent Documents 1 and 2 are used for such connection work, there is no change in that the compression dies are heavy, and there is a problem that the burden on workers who replace the compression dies during the work is large. is there. In addition, there is a problem in that a compression die of a kind corresponding to the wire type diameter of the electric wire being maintained must be stored, and a storage space for the compression die and a management work are required.
The present invention has been made in view of the above circumstances, and reduces the burden on workers by reducing the size and weight of parts to be replaced during compression connection work, and also reduces the storage space for compression dies. The purpose is to let you.

In order to solve the above-mentioned problems, the invention of claim 1 is characterized in that an adapter accommodating portion, a compression tool having a first die pressurizing mechanism, a detachable set in the adapter accommodating portion, and a first surface on the surface. A first adapter having a first die support recess for detachably supporting the die, and a sleeve which is detachably set in the first die support recess and is crimped to the end of the electric wire on the surface A first die having a sleeve compression recess for supporting the sleeve and a pressing recess for clamping the sleeve between the sleeve compression recess and a state in which the pressing die is set on the compression tool And a second die pressed from the first die by the first die pressurizing mechanism, wherein the sleeve compression device has a first die support recess in the first adapter. The recess for compressing the sleeve Characterized in that the detachable guide unit for only supporting a different type of the first die freely interchangeably removable shape is provided.
According to the first aspect of the present invention, since a plurality of types of dies that differ only in the shape of the recess for compressing the sleeve are interchangeably detachable, only the dies set in the adapter are replaced when the sleeve is compressed.
According to a second aspect of the present invention, in the first aspect, the adapter accommodating portion is provided with a restricting portion that prevents the first adapter from being displaced or dropped out.

  In the present invention, since only the die set in the adapter is exchanged, parts to be exchanged can be reduced and reduced in weight as compared with the conventional compression die, and the burden on the operator can be reduced. In addition, since the compression die is composed of an adapter and a die, it is only necessary to hold the die corresponding to the adapter and the wire type, and the storage space and transport weight can be reduced, reducing the cost for storage and transport. can do.

It is a schematic sectional drawing of a sleeve compression apparatus. It is a perspective view of a compression die and a first die. It is a figure which shows the structure of a steel core aluminum strand. It is a schematic diagram explaining the connection method of a steel core aluminum strand.

[First embodiment]
A first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a schematic cross-sectional view of a sleeve compression apparatus according to this embodiment. FIG. 2 is a perspective view of the compression die and the first die according to the present embodiment. The present embodiment is characterized in that a compression die for compressing the sleeve by sandwiching the sleeve from two directions is constituted by a die that presses the sleeve and an adapter that supports the die.
Here, the “electric wire” in this specification includes electric wires that are compressed and connected using a compression tool, such as hard copper stranded wire, steel core aluminum stranded wire, copper alloy stranded wire, aluminum alloy stranded wire. The “sleeve” includes a cylindrical portion of a compression terminal for inserting and compressing an electric wire, in addition to a compression sleeve such as a straight shape, a jumper shape, a parallel branch shape, and a Y branch shape.

As shown in FIG. 1, a sleeve compression device 1 according to this embodiment is a device used for compression connection of an electric wire such as an overhead electric wire, and is attached to the compression tool 10 that pressurizes the sleeve 110 and the compression tool 10. The compression die 30 is in pressure contact with the sleeve 110.
A compression tool 10 shown in FIG. 1 is an electric tool that compresses and connects an electric wire 100 by generating a high compression force by hydraulic pressure, pressurizing a sleeve 110 sandwiched between compression dies. In this example, the case where the ends of two wires are inserted from both ends of one sleeve and the sleeve is pressurized and compressed to electrically connect between the ends of both wires will be described. The compression apparatus of the present invention can also be applied when a crimp terminal is crimped to the end of an electric wire.
The compression tool 10 has an accommodating portion 12 that accommodates a compression die 30. In the accommodating portion 12, the first adapter support portion 14 that supports the first adapter 38, the second adapter support portion 16 that supports the second adapter 58, and the first adapter 38 are supported. A die pressurizing mechanism 18 that pressurizes the second die 54 via the first die 34.

In addition, on the inner side surface of the accommodating portion 12, a restricting portion 20 that prevents the displacement of the first adapter 38 and the second adapter 58 is provided.
A compression tool 10 shown in FIG. 1 is a tool that applies a compressive force in a direction along gravity, and has a die pressurizing mechanism 18 below the compression tool 10 and includes a first die 34 accommodated in the accommodating portion 12. Is pushed up from below to pressurize the sleeve 110. Although not shown, the compression tool 10 has a mechanism for pressing the second adapter 58 from above during pressurization.

The compression die 30 will be described with reference to FIG. FIG. 2 is a perspective view of the compression die 30. The compression die 30 includes a set of a first compression die 32 that applies a compression force from one of the outer peripheral surfaces of the side surface of the sleeve 110 and a second compression die 52 that applies a compression force from the other (opposite side).
The first compression die 32 includes a first die 34 having a sleeve compression recess 36 for supporting a sleeve 110 for crimping to the end of the electric wire 100 on the surface, and the first die 34 is detachable. And a first adapter 38 having a first die support recess 40 for supporting. In the first die support recess 40, a plurality of types of first dies 34 (34a, 34b) that differ only in the shape of the sleeve compression recess 36 (36a, 36b) are interchangeably and detachably supported. The first attachment / detachment guide portion 42 is provided. Here, the plurality of types of first dies 34 differing only in the shape of the sleeve compression recess 36 (36a, 36b) have the same external shape excluding the sleeve compression recess of each first die 34. Therefore, it means that each first die can be supported in the die support recess 40 in common. Since the first attachment / detachment guide portion 42 also serves to prevent the die from being displaced laterally from the adapter when the sleeve 110 is compressed, the first attachment / detachment guide portion 42 needs to have a structure that can withstand the pressure during compression. Therefore, the first attachment / detachment guide portion 42 has a shape along the direction in which the compressive force works (a groove shape extending in the vertical direction). In addition, a first restriction recess 44 that fits into the restriction portion 20 of the compression tool 10 is provided at an appropriate position on the side surface of the first adapter 38 to prevent the first adapter 38 from being displaced relative to the compression tool 10.

The second compression die 52 has a second die 54 having a clamping recess 56 on the surface for clamping the sleeve 110 between the second compression die 36 and the sleeve compression recess 36, and the second die 54 is detachably supported. And a second adapter 58 having a second die support recess 60. The second die support recess 60 is used to interchangeably and detachably support a plurality of types of second dies 54 (54a, 54b) that differ only in the shape of the clamping recesses 56 (56a, 56b). A second attachment / detachment guide portion 62 is provided. Here, the plurality of types of second dies 54 differing only in the shape of the pinching recesses 56 (56a, 56b) have the same external shape except for the sleeve compression recesses of the respective second dies 54. This means that the second dies can be commonly supported in the die support recess 60.
The second attachment / detachment guide portion 62 also has a shape along the direction in which the compressive force acts (a groove shape extending in the vertical direction) for the same reason as the first attachment / detachment guide portion 42. A second restriction recess 64 that fits into the restriction portion 20 of the compression tool 10 is provided at an appropriate position on the side surface of the second adapter 58 to prevent the displacement of the second adapter 58 with respect to the compression tool 10.

Further, as shown in FIG. 1, when the compressive force applied to the sleeve 110 is in the direction along the gravity, the second die support recess 60 is located on the lower surface side of the second adapter 58 while being accommodated in the accommodating portion 12. As it is, the second die 54 falls. Therefore, a fall prevention mechanism for preventing the second die 54 from dropping from the second adapter 58 is provided.
In the compression die 52 of FIG. 1, latching portions 66 and 68 are provided on the side portions of the second die 54 and the second adapter 58 that do not contact each other. A detachable connection tape 70, for example, a tape made of a hook-and-loop fastener, is hooked on the hooks 66 and 68 to support the second die 54.
As the fall prevention mechanism, a latch piece, a latch ring, or the like can be used instead of the latch portion, and a connection string or a connection hook can be used instead of the connection tape. Moreover, a magnet can be arrange | positioned in the suitable place in the 2nd die | dye support recess 60, and the 2nd die | dye 54 can be comprised from a ferromagnetic body, and it can also prevent fall by magnetic force.

An electric wire compression connection method using the sleeve compression device 1 according to the present embodiment will be described with reference to FIGS. 3 and 4. FIG. 3 is a view showing a structure of a steel core aluminum stranded wire. FIG. 4 is a schematic diagram for explaining a method of connecting steel core aluminum strands. The steel core aluminum stranded wire is an example of an electric wire.
As shown in FIG. 3, a steel core aluminum strand 101 includes a steel core wire 102 disposed at the center of the electric wire, and an aluminum strand wire 103 in which a plurality of aluminum wires are combined around the steel core wire 102. Is composed of. As described above, the connection requires two steps of compression connection between the steel core wires 102 and compression connection between the aluminum strands 103.

A work procedure for compression connection will be described.
The first adapter 38 is set on the first adapter support portion 14 of the compression tool 10, and the first die 34 a for compressing the steel sleeve 112 is set in the first die support recess 40. For the second compression die 52, the second die 54 a for compressing the steel sleeve 112 is set in the second die support recess 60.
For the two steel core aluminum wires 101 to be connected, the aluminum wire 103 is cut in advance so that the steel core wire 102 extends from the end 104 of the aluminum strand 103 (FIG. 3). The aluminum sleeve 111 is inserted into the aluminum wire 103a portion of one steel core aluminum wire 101a. The steel core wires 102a and 102b are inserted from the respective end openings of the steel sleeve 112, and are brought together in the steel sleeve 112 (FIG. 4A).

The steel sleeve 112 inserted through the steel core wire 102 is placed in the sleeve compression recess 36. The second compression die 52 on which the second die 54 a is set is set in the accommodating portion 12. Then, the steel sleeve 112 is sandwiched between the compression dies 30 and compressed by being pressurized by the die pressurizing mechanism 18.
The second compression die 52 is removed from the accommodating portion 12, and the second die 54a set in the second adapter 58 is replaced with a second die 54b for aluminum sleeve compression. Further, the first die 34a is removed from the first adapter 38, and the first die 34b for compressing the aluminum sleeve 111 is set.
The aluminum sleeve 111 is moved so that the entire steel sleeve 112 and the ends 104 of both aluminum strands are covered (FIG. 4B). The aluminum sleeve 111 is placed in the sleeve compression recess 36. The second compression die 52 is set in the accommodating portion 12. Then, pressurization is performed by the die pressurizing mechanism 18 so that the aluminum sleeve 111 is sandwiched and compressed by the compression die 30 to complete the connection operation.

As described above, according to the present embodiment, the compression die is configured by the die that press-contacts the sleeve and the adapter that supports the die. Therefore, when compressing a sleeve having a different diameter, only the die that is set on the adapter is used. Replace it. For this reason, parts to be replaced during work can be reduced in size and weight, and the burden on the worker can be reduced. In the present embodiment, both the first compression die 32 and the second compression die 52 are constituted by a die and an adapter, but at least the first compression die 10 that is first accommodated in the accommodating portion 12 of the compression tool 10. If the compression die 32 is composed of a die and an adapter, the burden on the worker can be reduced.
In addition, as a necessary part for the work, it is only necessary to store the die corresponding to the adapter and the line type, so that the storage space for the compression die can be reduced. Furthermore, since it is only necessary to bring an adapter and a die to the work site, the carrying weight can be reduced. As a result, costs for storage and transportation can be reduced.

  DESCRIPTION OF SYMBOLS 1 ... Sleeve compression apparatus, 10 ... Compression tool, 12 ... Accommodating part, 14 ... 1st adapter support part, 16 ... 2nd adapter support part, 18 ... Die pressurization mechanism, 20 ... Control part, 30 ... Compression die 32 ... first compression die, 34 ... first die, 36 ... sleeve compression recess, 38 ... first adapter, 40 ... first die support recess, 42 ... first attachment / detachment guide portion, 44 ... first restriction recess, 52 ... second compression die, 54 ... second die, 56 ... clamping recess, 58 ... second adapter, 60 ... second die support recess, 62 ... Second attaching / detaching guide part, 64 ... second regulating recess, 66, 68 ... latching part, 70 ... connecting tape, 100 ... electric wire, 101 ... steel core aluminum strand, 102 ... steel core wire, 103 ... aluminum Stranded wire 104 ... End portion 110 ... Sleeve 111 ... Aluminum sleeve 112 Steel sleeve

Claims (2)

A compression tool including an adapter housing portion and a first die pressurizing mechanism; and a first die support recess which is detachably set in the adapter housing portion and which detachably supports the first die on the surface. A first adapter having a sleeve compression recess that is detachably set in the first die support recess and supports a sleeve for crimping the wire end on the surface. The first die pressurizing mechanism removes the sleeve from the first die in a state of having a pressing recess for clamping the sleeve between the sleeve compression recess and the compression tool. A second die to be pressed, and a sleeve compression device comprising:
The first die support recess of the first adapter has an attachment / detachment guide portion for detachably supporting a plurality of types of the first dies that differ only in the shape of the sleeve compression recess. A sleeve compression device provided.   The sleeve compression device according to claim 1, wherein the adapter accommodating portion is provided with a restricting portion that prevents the first adapter from being displaced and dropped.

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