JP2008199861A - Articulated structure of tool for indirect hot-line work, and insulated operating rod for indirect hot- line work - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an articulated structure of a tool for indirect hot-line work and an insulated operating rod for the indirect hot-line work wherein a pin of the insulated operating rod is not easily removed from a hooking/fixing groove of a connecting metal fitting when the indirect hot-line work is executed. <P>SOLUTION: In the hooking/fitting groove of the connecting metal fitting, a second shift slot portion of a nearly lateral L-shape consisting of a lateral slot portion and a longitudinal slot portion is added to a first shift slot of a nearly reverse L-shape consisting of a longitudinal slot portion, a lateral slot portion and a longitudinal slot portion. Alternatively, an additional longitudinal slot is formed at a longitudinal slot. Even if the pin moves up to an upper end in the longitudinal slot, removal in a lateral direction is prohibited, and the pin is not easily removed from the hooking/fitting groove. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a connection structure between an indirect hot-wire work tool and an indirect hot-wire work insulation operation rod, and more specifically, a hook-like connection fitting for an indirect hot-wire work tool into which a tip pin of the insulation operation stick is inserted It relates to the improvement of the groove.

In the indirect hot line work, in order to ensure the safety of the worker who is working, for example, an insulating operation bar for indirect hot line work (hereinafter referred to as an insulation operation bar) disclosed in Patent Document 1 is used. Various indirect hot-wire work tools such as an intermediate peeler are interchangeably connected to the tip of the insulating operation rod.
A pair of torque output pins project from the outer circumferential surface of the cylindrical tip of the insulating operation rod at opposite positions in the circumferential direction (positions spaced 180 ° in the circumferential direction).
On the other hand, the tool for indirect hot wire construction has an operation input section that is provided so as to be rotatable about its axis. A connection fitting having a cylindrical socket portion is fixed to the operation input portion. The socket portion is formed with a pair of latching grooves at opposite positions spaced apart by 180 ° in the circumferential direction, and the pair of torque output pins are respectively inserted into the latching grooves and latched. ing. By hooking the corresponding torque output pins in these hooking grooves, the insulating operation rod and the indirect hot wire construction tool are connected.

  FIG. 7 shows a connecting bracket described in Patent Document 1. As shown in FIG. 7, the latching groove 102 formed in the socket portion 101 of the connection fitting 100 has a substantially inverted L shape with the L-shaped inner space facing down. That is, the latching groove 102 includes a first vertical groove portion 103 having a lower end opened at the lower opening edge 101a of the socket portion 101 and extending in the axial direction of the socket portion 101, and a first vertical groove portion. 103, one end of which communicates with the upper end of the socket 103 and extends in the circumferential direction of the socket 101, and the other end of the first transverse groove 104 of which the upper end communicates with the lower side. And a second vertical groove portion 105 having a length shorter than that of the first vertical groove portion 103.

Further, the operation output portion 107 formed at the distal end portion of the insulating operation rod 106 is biased by the tip portion protruding from the opening of the distal end surface of the insulation operation rod 106 by the spring force of the coil spring housed therein. A pin 108 is provided internally. A pair of torque output pins 109 protrude from the outer periphery of the operation output unit 107 at opposite positions in the circumferential direction.
Therefore, by inserting the operation output portion 107 of the insulating operation rod 106 into the socket portion 101 and hooking the torque output pin 109 to the second vertical groove portion 105 of the hooking groove 102, these are connected. Become.
Japanese Patent Laid-Open No. 10-12303

However, in the connecting metal fitting 100 according to Patent Document 1, the retaining groove 102 of the socket portion 101 is configured in a substantially inverted L shape. As a result, when the insulating operating rod 106 to which the tool is connected is lifted, the spring is pushed and shrunk by the weight of the tool, the tool is lowered, the pin 109 is raised, and the insulating operating rod 106 is wobbled by the weight of the tool. There is a problem that the tool may come off from the tip of the insulating operation rod 106 before being hooked on the wire.
In addition, the indirect hot-wire work tool suspended from the overhead electric wire hardly changes its height position from the ground by its own weight even if the connected insulating operation rod 106 is slightly pushed up. Therefore, for example, when the insulation operating rod 106 having a reduced spring force of the coil spring 108 is employed, when the insulation operating rod 106 is accidentally pushed up directly during the operation of the indirect hot wire construction tool, The position of the torque output pin 109 in the retaining groove 102 moves from the lower end position a of the second vertical groove portion 104 to the upper end position b. The moving position b is a communication portion between the first lateral groove portion 104 and the second vertical groove portion 105. Moreover, the length direction of the first lateral groove portion 104 is substantially horizontal during the construction. Therefore, the torque output pin 109 freely moves in the first lateral groove portion 104 when the overhead distribution line shakes due to wind and rain, or when the insulating operation rod shakes during the work operation. As a result, when the torque output pin 109 reaches the communication position c between the first lateral groove portion 104 and the first vertical groove portion 103, the torque output pin 109 passes through the first vertical groove portion 103 and is latched. There was a risk of disengagement from the groove 102.

Accordingly, as a result of earnest research, the inventor found that the latch groove of the socket portion was placed behind the first shift groove portion having a substantially inverted L shape when the operation rod was erected, and the second shift groove portion having a substantially L shape. To achieve a two-stage shift groove structure. If the final latching position between the torque output pin and the latching groove is the communication position between the second lateral groove part and the third vertical groove part in the second shift groove part, the above-mentioned problem As a result, the present invention has been completed.
Alternatively, the torque output pin latching position when the operating rod is erected is a position where the groove is not connected in the lateral direction (circumferential direction), so that the torque output pin can be prevented from coming off from the latching groove. As a result, the present invention was completed.

  The present invention relates to an indirect hot-wire work tool and an indirect hot-wire work insulation tool that do not disengage the torque output pin of the indirect hot-wire work insulation operating rod from the latching groove of the socket part in indirect hot wire work. It aims at providing the connection structure of.

  In the invention according to claim 1, the operation output part of the insulating operation rod for indirect hot-wire construction is detachably connected to the connection fitting provided in the operation input part of the rotatable indirect hot-wire work tool. In the connecting structure of an indirect hot-wire construction tool and an indirect hot-wire work insulation operating rod that transmits the operating force of the indirect hot-wire work insulation operating rod to the indirect hot-wire construction tool through the connecting metal fitting, Has a cylindrical socket portion with one end opened, and a hooking groove for locking the torque output pin of the operation output portion is formed in the socket portion, and the hooking groove is formed on the socket portion. A first shift groove portion that communicates with the opening and forms a portion on the opening side of the latching groove; and a second shift groove portion that communicates with the first shift groove portion and configures a portion on the back side of the latching groove; And the first shift groove is formed in the opening of the socket. A first vertical groove portion extending in the axial direction of the socket portion, and one end thereof communicating with the other end of the first vertical groove portion and extending in the circumferential direction of the socket portion. A horizontal groove portion and a second vertical groove portion having one end communicating with the other end of the first horizontal groove portion and extending toward the opening of the socket portion and having a length shorter than that of the first vertical groove portion The second shift groove portion has a first end communicating with the other end of the second vertical groove portion and extending in a circumferential direction from one end of the first horizontal groove portion toward the other end. An indirect hot-wire construction tool having two lateral groove portions and a third vertical groove portion having one end communicating with the other end of the second lateral groove portion and extending in a direction opposite to the direction toward the opening; It is a connection structure with an insulating operation rod for indirect hot wire construction.

According to the first aspect of the present invention, even if the tool is lowered and the torque output pin is raised by connecting the heavy tool, the pin does not move in the circumferential direction because the pin is located in the longitudinal groove. (Does not enter the lateral groove). Therefore, the tool can be almost completely avoided from falling off from the tip of the insulating operation rod.
More specifically, the latching position of the final torque output pin in the latching groove is the communication position (connecting position) between the second lateral groove part and the third vertical groove part of the second shift groove part. As an indirect hot-line work tool. When the indirect hot wire construction tool is lifted upward during the construction, the second lateral groove portion has a substantially horizontal length. For this reason, when the overhead distribution line shakes due to wind and rain, or when the insulating operation rod for indirect hot-wire work is shaken by work operation, the torque output pin freely moves in the second lateral groove portion. As a result, the torque output pin may reach the communication position between the second lateral groove portion and the second vertical groove portion. However, in order to move from the second shift groove to the opening portion of the first shift groove, it is necessary to move the torque output pin above the second vertical groove portion and push it up to the first horizontal groove portion. . At this time, in the inner space of the socket portion, the urging pin protruding from the front end surface of the operation output portion is pressed against the inner surface of the upper end plate of the socket portion by the spring force of the coil spring built in the operation output portion. . Therefore, the torque output pin is always pressed against the lower portion of the second lateral groove portion. As a result, there is little possibility that the torque output pin passes through the first vertical groove portion and is accidentally detached from the latching groove.
As a result, it is possible to basically prevent the insulative hot-wire construction insulating operation rod from falling off from the indirect hot-wire construction tool during the construction.
If an insulation operating rod for indirect hot wire construction is used with a reduced spring force of the coil spring housed in its tip, or if the tool weight is heavy, The force which presses a torque output pin to the lower part of a 2nd horizontal groove part becomes weak. Thereby, during indirect hot wire construction, the position of the torque output pin in the retaining groove moves from the lower end of the third vertical groove part to the deep position (upper end part) of the third vertical groove part, Positioning is performed in such a state that only downward movement is permitted. As a result, there is almost no risk that the torque output pin will accidentally come off the retaining groove.

The connecting metal fitting is a metal fitting that has a cylindrical socket portion as a main body, and can detachably connect the operation input portion of the tool for indirect hot wire construction and the operation output portion of the insulating operation rod for indirect hot wire construction. The connecting metal fitting may be always attached to the operation input unit of the tool for indirect hot-line construction, or may be separately attached to the operation input unit separately from the operation input unit and only in use.
The type of overhead distribution line is arbitrary. For example, a watertight electric wire, an electric wire with a wear detection layer, or the like can be employed.
As the tool for indirect hot-wire construction, for example, a stripper that strips off the insulation coating of the live-distributed overhead distribution line can be employed.
The structure of the operation input part of the tool for indirect hot work is arbitrary. It suffices if torque can be input from the torque output pin of the insulating operation rod for indirect hot-wire work via the connecting bracket.

The structure of the insulating operation rod for indirect hot wire construction is arbitrary. For example, one bar may be used, or two bars having axes parallel to each other may be provided.
The material of the insulating operation rod for indirect hot-wire construction is arbitrary as long as it is electrically insulating. For example, various plastics such as fiber reinforced plastic (FRP).
As a material for the socket portion, for example, various metals such as aluminum, various plastics such as alloys and polyacetal can be used.
The number of torque output pins used may be one or two or more.
The latching groove is formed on the peripheral side plate of the socket portion. The latching groove may be formed by cutting out the peripheral side plate of the socket part, or may be formed by recessing a part of the inner peripheral side of the peripheral side plate of the socket part. The shape of the retaining groove (first shift groove portion) is substantially L-shaped when the socket portion is viewed from the front, but may be substantially inverted T-shape. The number of hooking grooves formed is appropriately changed according to the number of torque output pins used.

The first shift groove portion has an inverted L-shape (or substantially T-shape) in the usage state of the connecting fitting with one opening edge of the socket portion facing down, whereas the second shift groove portion is In the use state of this connecting metal fitting, it becomes a horizontal L-shape with the L-shaped inner space facing up.
The length of the first vertical groove portion is arbitrary as long as it is shorter than the total length of the socket portion in the axial direction. The lengths of the second vertical groove portion and the third vertical groove portion are such that the end of the second vertical groove portion or the end of the third vertical groove portion does not reach any opening edge of the socket portion. It is optional.
The length of the first lateral groove portion and the second lateral groove portion is arbitrary as long as the total length is shorter than the total length in the circumferential direction of the socket portion.
One opening edge of the socket portion refers to an opening edge on the side (lower side) to which the insulating operation rod for indirect hot-wire work is connected when the connecting metal fitting is used.
The direction opposite to the direction of one opening edge of the socket portion refers to the direction (upward direction) of the opening edge on the side opposite to the side to which the insulating operation rod for indirect hot-wire work is connected when the connecting fitting is used.
The first vertical groove portion, the first horizontal groove portion, the second vertical groove portion, the second horizontal groove portion, and the third vertical groove portion constituting the retaining groove are substantially linear grooves. It is. These grooves are connected at a substantially right angle.

In the invention according to claim 2, the operation output part of the insulating operation rod for indirect hot-wire construction is detachably connected to the connection fitting provided in the operation input part of the rotatable indirect hot-wire work tool. In the connecting structure of an indirect hot-wire construction tool and an indirect hot-wire work insulation operating rod that transmits the operating force of the indirect hot-wire work insulation operating rod to the indirect hot-wire construction tool through the connecting metal fitting, Has a cylindrical socket part with one end opened, and a hooking groove for locking the torque output pin of the operation output part is formed in the socket part. The hooking groove is formed on the socket part. A first longitudinal groove portion that opens at one end of the opening and extends in the axial direction of the socket portion, and one end communicates with the other end of the first longitudinal groove portion, and extends in the circumferential direction of the socket portion. One end of the first lateral groove and the other end of the first lateral groove Communicating, extending toward the opening of the socket portion, and having one end communicating with the second longitudinal groove portion having a length shorter than that of the first longitudinal groove portion and the other end of the first lateral groove portion, It is the connection structure of the tool for indirect hot wire construction which has the 3rd vertical groove part extended in an axial direction toward the other end of a socket part, and the insulation operating rod for indirect hot wire work.
Since the shape of the retaining groove is a third vertical groove portion extending toward the other end opposite to the opening of the socket portion with respect to the second vertical groove portion, the torque output pin is in the axial direction of the socket portion. When it moves to, it will be inserted in this 3rd vertical groove part directly penetrated to the 2nd vertical groove part. Therefore, the movement of the pins in the lateral direction (circumferential direction) is restricted, and the possibility that the insulating operation rod comes out from the connecting fitting can be reduced.

According to the first aspect of the present invention, the first shift of the substantially inverted L-shape including the first vertical groove portion, the first horizontal groove portion, and the second vertical groove portion is used as the retaining groove of the socket portion. Since it has a two-stage upper and lower shift groove structure comprising a groove portion and a substantially horizontal L-shaped second shift groove portion made up of a second horizontal groove portion and a third vertical groove portion communicating with the groove portion, indirect By arranging the torque output pin in the third vertical groove portion of the second shift groove during hot wire construction, the torque output pin of the insulating operation rod for indirect hot wire work is unlikely to come off from the latching groove of the connection fitting. As a result, during the construction, the indirect hot-wire work insulation operation rod is less dropped from the indirect hot-wire work tool.
Further, according to the invention described in claim 2, similarly, the torque output pin can be positioned in the third longitudinal groove portion, and the insulation for indirect hot-wire work from the tool for indirect hot-wire work during construction is provided. The drop of the operating rod is reduced.

  Examples of the present invention will be specifically described below. Here, for convenience of explanation, in the state of use of the tool for indirect hot-wire work, the direction in which the insulating operation rod for indirect hot-wire work is connected to the connecting metal is the downward direction of the connecting metal, and the indirect hot wire The direction in which the construction tool is connected is the upper direction of the connecting bracket.

  1 and 2, reference numeral 10 denotes a connection structure (hereinafter referred to as a connection structure) between an indirect hot-wire work tool and an indirect hot-wire work insulating operation rod according to Embodiment 1 of the present invention. This connecting structure 10 is connected to a connecting fitting 50 provided on a rotatable operation input section 13 of an indirect hot-wire construction tool 12, and at the tip of an indirect hot-wire construction insulating operation bar (hereinafter referred to as an insulation operating bar) 14. The structure which connects the provided operation output part 15 so that attachment or detachment is possible is shown.

The insulating operation rod 14 is a cylindrical rod made of fiber-reinforced plastic having a predetermined length and a circular cross section. A pair of torque output pins 18 having a predetermined length and a predetermined thickness are provided on the outer peripheral portion of the operation output portion 15, which is the tip portion of the insulating operation rod 14, at two positions 180 ° apart in the circumferential direction. Yes. The pair of torque output pins 18 have the same axis and are inserted into the horizontal holes of the operation output unit 15.
That is, the operation output portion 15 is formed with a hole portion 15 a having a predetermined diameter located on the axis of the insulating operation rod 14. The hole 15 a is opened at the distal end surface of the operation output unit 15. A coil spring 51 is housed in the inner part of the hole 15a, and the tip of the hole 15a is slightly reduced in diameter. An urging pin 52 whose tip protrudes from or is immersed in the opening is inserted into the small diameter portion in a state of being freely movable in the axial direction by the spring force of the coil spring 51. A flange-like stopper 52a is formed at the lower end of the urging pin 52 to prevent the hole 15a from coming off from the small diameter portion. The upper end of the coil spring 51 is in contact with the stopper 52a and is biased upward (in a direction protruding from the hole).
The indirect hot-wire construction tool 12 in this case is a power connection clamp that forms a bypass circuit in the overhead distribution line 11.
The connecting metal fitting 50 is made of an aluminum alloy, and when connecting the insulating operation rod 14 and the indirect hot wire work tool 12, the socket portion 19 is detachably attached to the distal end portion (operation output portion 15) of the insulating operation rod 14. Is the main body. The socket part 19 is a thick cylindrical body whose upper opening is closed by an upper end plate. On the upper surface of the central part (axial center part) of the upper end plate of the socket part 19, a shaft part 20 whose tip part is connected to the operation input part (screw part) 13 is erected. The socket part 19 is provided with an opening at an opening edge 19a of the socket part 19 (lower opening edge in FIG. 1). Further, a pair of latching grooves 21 for inserting and latching the pair of torque output pins 18 are provided at two positions (opposite positions) spaced 180 ° in the circumferential direction of the socket portion 19. Is formed.

As shown in FIGS. 1 and 3 to 5, each latching groove 21 communicates with the first shift groove part 22 and the first shift groove part 22 constituting the part on the opening side (connected at right angles). And a second shift groove portion 23 that constitutes a portion on the back side of the latching groove 21. These groove portions 22 and 23 are formed to have a groove width that is movable by inserting the pin 18. That is, the groove width of each latching groove 21 is slightly wider than the diameter of the torque output pin 18 and is substantially constant over substantially the entire length of the latching groove 21. Moreover, the length of the socket part 19 of each latching groove | channel 21 is the length for about 90 degrees in the circumferential direction of the socket part 19 (1/4 length of the circumference of a socket part).
The first shift groove portion 22 has a first vertical groove portion 24 having one end opened at an opening edge 19 a below the socket portion 19 and extending in the axial direction of the socket portion 19, and a first vertical groove portion 24. One end portion is connected to the other end portion (connected at a right angle) and extends in the circumferential direction at the socket portion 19, and one end portion is connected to the other end portion of the first lateral groove portion 25. The second vertical groove portion 26 is connected (connected at right angles) and extends in the direction of the opening edge 19a (axial direction) and has a length shorter than that of the first vertical groove portion 24. The second shift groove 23 is connected at one end to the other end of the second vertical groove portion 26 and is separated from the first vertical groove portion 24 in the circumferential direction from one end of the first horizontal groove portion 25. A second lateral groove portion 27 extending in a direction, one end portion communicating with the other end portion of the second lateral groove portion 27 (connected at a right angle), and a direction opposite to the direction of the opening edge 19a (the direction of the upper end plate) ) And a third longitudinal groove portion 28 extending to ().

The length of the first longitudinal groove portion 24 is about one half of the length of the socket portion 19 in the axial direction. The lengths of the second vertical groove portion 26 and the third vertical groove portion 28 are about one quarter of the length of the socket portion 19 in the axial direction. Each length of the first lateral groove portion 25 and the second lateral groove portion 27 is approximately one quarter of the circumferential length of the socket portion 19.
Thus, by forming the retaining groove 21 in the socket part 19, the socket part 19 has a protrusion 19 b formed on the opening edge side of the socket part 19 among the formation part of the first shift groove part 22. Of the forming portions of the second shift groove portion 23, another protrusion 19 c is formed on the upper end plate side of the socket portion 19. Further, the length of the socket portion 19 in the axial direction as a whole can be made the same as that of the conventional L-shaped groove. This means that the total weight of the socket part 19 is not increased.

Next, referring to FIG. 1 and FIG. 2, in order to form a bypass circuit in the aerial distribution line 11 using the connection fitting 50 according to the first embodiment, the indirect hot-wire construction tool 12 is moved by the insulating operation rod 14. The operation method will be described.
First, as shown in FIGS. 1 and 2, an operator attaches the indirect hot wire construction tool 12 to the tip of the insulating operation rod 14. Specifically, the torque output pin 18 and the first vertical groove portion 24 are aligned in the circumferential direction between the insulating operation rod 14 and the connection fitting 50, with the axis of the insulation operation rod 14 being aligned with the axis of the connection fitting 50. And align. Next, the operation output unit 15 is gradually inserted into the internal space of the socket unit 19. As a result, the torque output pins 18 pass through the corresponding first vertical groove portions 24 and reach the communication position P1 between the first vertical groove portions 24 and the first horizontal groove portions 25. At that time, the urging pin 52 comes into contact with the inner surface of the upper end plate of the socket part 19 and further the insertion of the operation output part 15 is advanced, so that the urging pin 52 operates against the spring force of the coil spring 51. It is almost completely pushed into the part 15. In this state, the insulating operation rod 14 is rotated in the direction indicated by the arrow X in FIG. As a result, the torque output pin 18 slides in the first lateral groove portion 25 in the direction of the arrow X in FIG. 1 and reaches the communication position P2 between the first lateral groove portion 25 and the second vertical groove portion 26. Here, when the force holding the insulating operation rod 14 is weakened, the biasing pin 52 protrudes from the tip opening of the operation output unit 15 by the spring force of the coil spring 51 and pushes down the insulating operation rod 14. Thereby, the torque output pin 18 passes through the second vertical groove portion 26 and reaches the communication position P3 between the second vertical groove portion 26 and the second horizontal groove portion 27. At this time, the torque output pin 18 is positioned at the innermost part of the first shift groove portion 22 having a substantially inverted L shape.

Then, the insulating operation rod 14 is further rotated in the arrow direction X in FIG. Thereby, the torque output pin 18 slides the second lateral groove portion 27 in the arrow direction X in FIG. 1, and the torque output pin 18 moves to the communication position P4 between the second lateral groove portion 27 and the third vertical groove portion 28. Reach. This is the final engagement position of the torque output pin 18 in the engagement groove 21.
Thereafter, the operator holds the insulating operation rod 14 and raises the tool 12 for indirect hot wire construction and hooks it on a predetermined position of the overhead power distribution line 11 in the live wire state. When the insulating operation rod 14 is rotated in a predetermined direction in this state, the torque output pin 18 moves to the position P3, and the rotational force (operation force) is the operation output unit 15, the torque output pin 18, the connecting bracket 50, the operation The data is transmitted and input to the indirect hot-wire construction tool 12 via the input unit 13, and the overhead distribution line 11 is processed by the indirect hot-wire construction tool 12.
By the way, when the tool 12 for indirect hot wire construction is lifted and lifted, the length direction of the second lateral groove portion 27 is substantially horizontal. Therefore, during this construction, the torque output pin 18 is easy to move in the second longitudinal groove portion 26. For example, when the insulating operation tool 12 is shaken by a work operation, the torque output pin 18 may reach the communication position P3 between the second vertical groove portion 26 and the second horizontal groove portion 27. However, the torque output pin 18 is always pressed against the lower portion of the second lateral groove portion 27 by the spring force of the coil spring 51. Therefore, in the movement from the second shift groove 23 to the first shift groove 22, the torque output pin 18 must move upward in the second vertical groove portion 25 against the spring force of the coil spring 51. I must. The push-up force of the insulation operating rod 14 required for that becomes considerably large. As a result, there is almost no possibility that the torque output pin 18 passes through the first vertical groove portion 24 and is accidentally detached from the latching groove 21.

By the way, for example, when an insulation operating rod 14 having a reduced spring force of the coil spring 51 is used, the force for pushing the torque output pin 18 downward by the biasing pin 52 protruding from the tip surface of the insulation operating rod 14 is weakened. . Alternatively, when the insulating operation rod 14 is lifted, the weight of the tool is too heavy and the pin 18 is raised, and the insulation operation rod 14 may be wobbled. In these cases, during the indirect hot wire construction, the torque output pin 18 is locked in the hook groove 21 from the lower end portion (communication position P4) of the third vertical groove portion 28 to the third vertical groove. It moves to the back position (upper end portion) P5 of the portion 28. Here, the torque output pin 18 is positioned in a state that allows only downward movement. It cannot move sideways. As a result, when the insulation operating rod 14 is rotated by being hooked on the overhead distribution line 11 as described above, the torque output pin 18 is located at the end P3 of the second lateral groove portion 27 and is used for indirect hot wire construction. The aerial distribution line 11 can be processed by the tool 12.
Even if the indirect hot work tool 12 is shaken by the operation, the torque output pin 18 is positioned at the back position P5 of the third vertical groove portion 28, so that it does not move in the horizontal direction. Therefore, even in the case of the insulating operation rod 14 in which the spring force of the coil spring 51 is reduced in this way, or even when the tool weight is too heavy, there is little possibility that the torque output pin 18 will accidentally come off the latch groove 21.

  In this way, the retaining groove 21 of the socket part 19 is made to have a substantially inverted L-shaped first shift groove part 22 composed of the first vertical groove part 24, the first horizontal groove part 25 and the second vertical groove part 26. And an upper and lower two-stage shift groove structure having a substantially horizontal L-shaped second shift groove portion 23 composed of a second horizontal groove portion 27 and a third vertical groove portion 28 communicating with the second horizontal groove portion 27. If the torque output pin 18 is disposed at the communication position P4 between the second lateral groove portion 27 and the third vertical groove portion 28 during the indirect hot wire construction, the torque output pin 18 of the insulating operation rod 14 is engaged with the latch groove 21. Hard to come off. Therefore, the insulation operating rod 14 is less dropped from the indirect hot-wire construction tool 12 during the construction, and the indirect hot-wire construction tool 12 can be prevented from dropping due to this drop-out.

FIG. 6 is a view showing a structure of a latching groove of a connection fitting used for a connection structure between an indirect hot wire work tool and an indirect hot wire work insulation operation rod according to Embodiment 2 of the present invention.
In the second embodiment, a third vertical groove portion 31 extending from the second vertical groove portion 26 in the axial direction of the socket portion 19 is formed in the first shift groove portion 22. As a result, even when the tool is heavy and the tool is shaken, the torque output pin 18 moves from the deep bottom P3 position of the second vertical groove portion 26 to the deep bottom P6 position of the third vertical groove portion 31, and the lateral direction The movement to is restricted, and the retaining is made.
Other configurations and operations are substantially the same as those in the first embodiment.

(A) is a principal part enlarged front view of the connection structure of the tool for indirect hot wire construction and the insulation operating rod for indirect hot wire work concerning Example 1 of this invention. (B) is an expanded view of the connection groove | channel of the connection structure of the tool for indirect hot wire construction which concerns on Example 1 of this invention, and the insulation operating rod for indirect hot wire work. It is a front view which shows the use condition of the connection structure of the tool for indirect hot wire construction which concerns on Example 1 of this invention, and the insulation operating rod for indirect hot wire work. It is a front view of the connection metal fitting of the tool for indirect hot wire construction concerning Example 1 of this invention. It is a side view of the connection metal fitting in the use condition of the connection structure of the tool for indirect hot wire construction which concerns on Example 1 of this invention, and the insulation operating rod for indirect hot wire work. It is a bottom view of the connection metal fitting of the tool for indirect hot wire construction concerning Example 1 of this invention. It is a front view of the connection metal fitting of the tool for indirect hot wire construction concerning Example 2 of this invention. It is a front view of the connection metal fitting in the use condition of the connection structure of the tool for indirect hot wire construction which concerns on the conventional means, and the insulation operating rod for indirect hot wire work.

Explanation of symbols

10 Connection structure of indirect hot-wire work tool and indirect hot-wire work insulation operation rod,
11 Overhead distribution lines,
12 Indirect hot-wire construction tools,
13 Operation output part (screw part),
15 Operation input section,
14 Insulation operation rod for indirect hot wire construction,
18 Torque output pin,
19 Socket part,
19a opening edge,
21 retaining groove,
22 1st shift groove part,
23 second shift groove,
24 first longitudinal groove portion,
25 first lateral groove portion,
26 second flutes,
27 second lateral groove portion,
28 third flutes,
50 Connecting bracket.

Claims (2)

The operation output part of the insulation operation rod for indirect hot-wire construction is detachably connected to the connection fitting provided in the operation input part of the rotatable indirect hot-wire construction tool, and the indirect hot-line work is performed via this connection fitting. In the connection structure of the indirect hot wire construction tool and the indirect hot wire construction insulation operation rod that transmits the operating force of the insulation operating rod to the indirect hot wire work tool,
The connection fitting has a cylindrical socket part with one end opened,
The socket part is formed with a latching groove for locking the torque output pin of the operation output part.
This retaining groove
A first shift groove portion that communicates with the opening of the socket portion and constitutes a portion on the opening side of the latching groove, and a second shift groove portion that communicates with the first shift groove portion and constitutes a portion on the back side of the latching groove. Of the shift groove,
The first shift groove portion is
A first longitudinal groove portion that opens at one end of the opening of the socket portion and extends in the axial direction of the socket portion;
A first lateral groove portion, one end of which communicates with the other end of the first vertical groove portion, and extends in the circumferential direction of the socket portion;
One end of the first horizontal groove portion communicates with the other end of the first horizontal groove portion, extends toward the opening of the socket portion, and has a second vertical groove portion shorter in length than the first vertical groove portion. ,
The second shift groove portion is
A second lateral groove portion extending in a circumferential direction from one end of the first lateral groove portion to the other end, and communicating with the other end of the second longitudinal groove portion;
An indirect hot-wire construction tool and an indirect hot-wire construction insulation having a third vertical groove portion that communicates with the other end of the second lateral groove portion and that extends in a direction opposite to the direction toward the opening. Connection structure with operation rod. The operation output part of the insulation operation rod for indirect hot-wire construction is detachably connected to the connection fitting provided in the operation input section of the rotatable indirect hot-wire construction tool, and the indirect hot-line work is performed via this connection fitting. In the connection structure of the indirect hot-wire construction tool and the indirect hot-wire work insulation operation rod that transmits the operating force of the insulation operating rod to the indirect hot-wire work tool,
The connection fitting has a cylindrical socket part with one end opened,
The socket part is formed with a latching groove for locking the torque output pin of the operation output part.
This retaining groove
A first longitudinal groove portion that opens at one end of the socket portion and extends in the axial direction of the socket portion;
A first lateral groove portion that communicates with the other end of the first vertical groove portion and extends in a circumferential direction of the socket portion;
One end communicates with the other end of the first lateral groove portion, extends toward the opening of the socket portion, and has a second vertical groove portion shorter in length than the first vertical groove portion;
An indirect hot-wire construction tool and an indirect hot-wire construction insulation having a third longitudinal groove portion that communicates with the other end of the first lateral groove portion and that extends in the axial direction toward the other end of the socket portion. Connection structure with operation rod.

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