JP5770226B2 - Adapter for indirect hot-wire construction - Google Patents

Description

  The present invention relates to an adapter for indirect hot wire construction. In particular, it is an adapter attached to a pair of opening and closing gripping arms provided at the tip of an indirect live tool such as an insulating operation rod, and fastened to a bolt member such as a pin insulator fixed to a brace provided on a power pole. The present invention relates to a structure of an adapter for indirect hot-wire construction in which a nut drop prevention cap for preventing nut drop is removed from a bolt member.

  There are two types of hot-line work that performs high-voltage distribution lines without power interruption: direct hot-wire method and indirect hot-wire method. In the direct hot wire construction method, workers wear protective equipment such as high-pressure rubber gloves and perform power distribution work by directly touching the high-voltage distribution line that is energized. On the other hand, the indirect hot wire method allows the operator to perform power distribution work without directly touching the high-voltage power distribution line that is energized using an insulating operation rod (hot stick) or the like.

  In general, an insulating operation rod is composed of a long operation rod and a power distribution work tool (hereinafter referred to as a tip tool) attached to the tip of the operation rod. And the insulation operating rod is comprised so that a front-end tool can be replaced | exchanged according to the work objectives, such as holding | griping or cutting | disconnecting a high voltage distribution line.

  For example, the pin insulator uses a bind wire to hold the high-voltage distribution line in the insulator portion. In this pin insulator, a bolt member is inserted through an arm metal provided on a power pole. And the pin insulator is being fixed to the arm metal by fastening a nut to a bolt member from the lower part.

  The nut fastened to the bolt member of the pin insulator described above is provided with a nut drop prevention cap made of synthetic resin. It is known that this nut drop prevention cap can be removed by a nut drop prevention cap attaching / detaching tool attached to the tip of the insulating operation rod. Moreover, it is known that the nut fastened to the bolt member of the pin insulator can be removed by a nut driver attached to the distal end portion of the insulating operation rod (for example, see Patent Document 1).

JP 2000-244502 (paragraph [0015], FIG. 4)

  Patent Document 1 describes that a nut fall-off prevention cap can be removed by a nut fall-off prevention cap attaching / detaching tool attached to the distal end portion of the insulating operation rod. However, a specific structure of the nut fall-off preventing cap attaching / detaching tool is disclosed. Not.

  As a matter of fact, when removing the nut drop prevention cap from the bolt member, the nut drop prevention cap is paired from the outer peripheral direction by using an insulating operation rod (so-called insulation jacket) having a pair of opening and closing gripping arms at the tip. The nut drop prevention cap was removed by pinching it with a gripping arm that opens and closes and pulling it downward. In addition, the nut drop prevention cap was cut with a hook knife using an insulating operation rod having a hook knife at the tip, and the nut drop prevention cap was removed.

  However, when using an insulating operation rod having a pair of opening and closing gripping arms at the tip, the nut drop prevention cap is sandwiched so that the nut drop prevention cap can be securely gripped because the nut drop prevention cap is cylindrical. There is a problem that it is difficult.

  Further, when the nut drop prevention cap is cut with a kama-type knife, there is a problem that the nut becomes an obstacle and the nut drop prevention cap cannot be easily cut. Furthermore, in this case, there is a problem that the nut drop prevention cap cannot be reused. There is a need for an adapter for indirect hot wire construction that can securely and easily remove a nut drop prevention cap attached to a bolt member provided on a pin insulator or the like. The above can be said to be the subject of the present invention.

  The present invention has been made in view of such a problem, and can be attached to a pair of opening and closing gripping arms provided at the tip of an indirect live tool such as an insulating operation rod, and a bolt member provided on a pin insulator or the like. It is an object of the present invention to provide an adapter for indirect hot-wire construction in which a nut drop prevention cap attached to a can be reliably and easily removed.

  The present inventor attaches a pair of indirect hot-wire construction adapters to the gripping claws of a pair of curved gripping arms provided at the tip of the insulating operation rod. Block-shaped adapter bodies extending substantially parallel to the gripping claws projecting in the direction, and at the distal ends of these adapter bodies are formed semicircular arc-shaped relief portions that face each other and escape the bolt members at the leading edge. Place a claw piece that can be inserted between the nut and the nut fall prevention cap, and with the pair of curved gripping arms closed, pull down the nut fall prevention cap with a pair of claw pieces, It has been found that it can be reliably and easily removed from the bolt member, and based on this, the following indirect hot-wire construction adapter has been invented.

  (1) The adapter for indirect hot-wire construction according to the present invention is attached to a pair of open and closed curved gripping arms provided at the distal end portion of the insulating operation rod, and the nut dropout that prevents the nut fastened to the bolt member extending downward is prevented. An adapter for indirect hot-wire construction that can be removed from the bolt member with a prevention cap, and has a block-like shape with an opening in the bottom where a gripping claw protruding in the centrifugal direction from the gripping arm can be inserted An adapter body, a locking means that is attached to the adapter body and fixes the gripping claw from a surface opposite to the gripping surface of the gripping claw, and holds one piece inside the adapter body, L-shaped fittings that are opposed to each other and have a claw piece that can be inserted between the nut and the nut drop prevention cap as another piece, and the adapter bodies are A first facing notch that is formed on the facing surfaces and that can be dropped by the nut fall-off prevention cap with the pair of gripping arms closed. The claw piece has a semi-circular arc-shaped first escape portion at the distal end edge for escaping the bolt member with the pair of gripping arms closed.

  (2) The adapter body has a semicircular arc-shaped second cutout groove on the facing surface, the bottom surface of which is closed so that the nut drop-off prevention cap can be accommodated with the pair of gripping arms closed. It is preferable.

  (3) It is preferable that the adapter main body includes a biasing member that biases a force for inserting the claw piece between the nut and the nut drop prevention cap.

  (4) An insulating cap member that covers the distal end side of the adapter main body except for the facing surface is further provided, and the cap member has a semicircular arc shape that escapes the nut with the pair of gripping arms closed. The second relief portion may be provided on the top wall.

  (5) The locking means has a distal end portion that can protrude from the recess, an engagement pin that comes into contact with the gripping claw from a surface opposite to the gripping surface of the gripping claw, and is held inside the adapter body. And a compression coil spring that urges the force of the combined pin toward the grip claw.

  The adapter for indirect hot wire construction according to the present invention includes claw pieces that are opposed to each other at the tip of the adapter main body and can be inserted between the nut and the nut drop prevention cap, so that when the pair of gripping arms are closed, the nut A pair of claw pieces can be inserted between the nut cap and the nut cap, and the nut cap is securely and easily removed from the bolt member by pulling down the insulation operating rod with the pair of gripping arms closed. it can.

It is a vertical view which shows the structure of the adapter for indirect hot wire construction by one Embodiment of this invention, and closed a pair of holding arm in the state which attached the pair of indirect hot wire construction adapter to a pair of holding arm. It is a state diagram. It is a perspective view which shows the structure of the adapter for indirect hot wire construction by the said embodiment, and has shown the adapter for one indirect hot wire construction in the perspective exploded view in duplication. It is a figure which shows the structure of the adapter for indirect hot wire construction by the said embodiment, FIG. 3 (A) is a top view of a pair of adapter for indirect hot wire construction in the state which closed a pair of holding arm, 3 (B) is a front view of a pair of indirect hot-wire work adapters in a state in which a pair of gripping arms is closed. It is AA arrow sectional drawing of FIG. 3 (B). It is a figure which shows the structure of the adapter for indirect hot wire construction by the said embodiment, FIG. 5 (A) is the perspective view which looked at the adapter for indirect hot wire construction from the bottom face side, FIG. The main part longitudinal cross-sectional view of the adapter for indirect hot wire construction of FIG. 5, FIG.5 (C) is a principal part cross-sectional view of one adapter for indirect hot wire work. FIG. 6A is a front view showing an example of an insulating operation rod according to the present invention, FIG. 6A shows a proximal end side of the insulating operation rod, and FIG. 6B shows a distal end side of the insulation operation rod. ing. It is the front view which expanded the front-end | tip part of the insulation operating rod shown in FIG. It is a front view which shows the structure of the adapter for indirect hot wire construction by the said embodiment, and is a state which opened a pair of holding arms at a predetermined angle in the state which attached a pair of indirect hot wire construction adapters to a pair of holding arms FIG.

Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.
[Configuration of adapter for indirect hot-wire construction]
Initially, the structure of the adapter for indirect hot wire construction by one Embodiment of this invention is demonstrated.

  FIG. 1 is a longitudinal view showing a configuration of an adapter for indirect hot-wire work according to an embodiment of the present invention, and shows a pair of grips with a pair of indirect hot-wire work adapters attached to a pair of gripping arms. It is the state figure which closed the arm. FIG. 2 is a perspective view showing the configuration of the adapter for indirect hot-wire work according to the embodiment, and one of the adapters for indirect hot-wire work is shown in a perspective exploded view.

  FIG. 3 is a diagram showing a configuration of the adapter for indirect hot-wire construction according to the embodiment, and FIG. 3 (A) is a plan view of a pair of adapters for indirect hot-wire construction in a state where a pair of gripping arms are closed. FIG. 3B is a front view of a set of adapters for indirect hot-wire construction in a state in which a pair of gripping arms is closed. FIG. 4 is a cross-sectional view taken along the line AA in FIG.

  FIG. 5 is a diagram showing the configuration of the adapter for indirect hot-wire work according to the embodiment, and FIG. 5 (A) is a perspective view of one indirect hot-wire work adapter as viewed from the bottom side, FIG. ) Is a vertical cross-sectional view of the main part of one adapter for indirect hot-wire work, and FIG. 5C is a cross-sectional view of main parts of the adapter for indirect hot-wire work.

(overall structure)
Referring to FIGS. 1 to 5, an adapter for indirect hot-wire construction (hereinafter abbreviated as “adapter”) 10 according to an embodiment of the present invention includes a block-shaped adapter body 1, a locking means 2, and an L-shaped adapter. An insertion fitting 3 is provided. The adapter 10 includes an urging member 4 made of a leaf spring and an insulating cap member 5.

  With reference to FIG. 1, a pair of adapters 10 and 10 are attached to a pair of open and closed curved gripping arms 7a and 7b provided at the distal end of an insulating operation rod 70, and the insulation operation rod 70 is operated to The nut drop prevention cap 9c for preventing the nut 9n fastened to the bolt member 9b extending downward from the gold 9a from being removed can be removed from the bolt member 9b.

(Adapter body configuration)
1 to 4, the adapter main body 1 can be attached to a pair of curved holding arms 7a and 7b that are opened and closed provided at the distal end portion of the insulating operation rod 70 (see FIG. 7). Further, the adapter body 1 has opposed surfaces 10a and 10a that face each other and are close to each other so as to be in close contact with each other with the pair of gripping arms 7a and 7b closed.

  Referring to FIG. 5, the adapter main body 1 has a recess 11h opened at the bottom. A gripping claw 71a or a gripping claw 71b that protrudes in the centrifugal direction from the pair of gripping arms 7a and 7b can be inserted into the recess 11h (see FIG. 1).

  Referring to FIG. 1 or FIG. 2, the adapter main body 1 has a recess 12h opened at the distal end surface. A piece 31 of the insertion fitting 3 is held in the recess 12h. Further, a biasing member 4 that biases one piece 31 of the insertion fitting 3 is accommodated in the recess 12h.

  Referring to FIG. 1 or FIG. 2, the adapter main body 1 has a semicircular arc-shaped first notch groove 10b formed on the opposing surface 10a. When the pair of gripping arms 7a and 7b are closed, the nut drop prevention cap 9c can be dropped into the pair of first cutout grooves 10b and 10b.

  Referring to FIG. 1 or FIG. 2, the adapter main body 1 has a second notch groove 10c communicating with the first notch groove 10b formed on the opposing surface 10a. When the pair of gripping arms 7a and 7b are closed, the bottom surface of the pair of second notch grooves 10c and 10c can be closed to accommodate the trunk portion 92c of the nut drop prevention cap 9c.

(Configuration of locking means)
Referring to FIG. 5, the locking means 2 includes an engagement pin 21 and a compression coil spring 22. The engaging pin 21 includes a shaft portion 21s and a flange portion 21f. The shaft portion 21 s is accommodated in the cylindrical portion 2 p protruding from the outer wall of the adapter main body 1. The tip of the shaft portion 21s protrudes into the recess 11h (see FIG. 5B). The flange portion 21f is in contact with the upper end edge of the cylindrical portion 2p.

  Referring to FIG. 5B, the compression coil spring 22 is wound around the outer periphery of the shaft portion 21s. The compression coil spring 22 is housed inside the cylindrical portion 2p. One end portion of the compression coil spring 22 is fixed to the shaft portion 21s. The other end of the compression coil spring 22 is fixed to the inner wall of the cylindrical portion 2p. The compression coil spring 22 urges the force that the tip of the shaft portion 21s protrudes into the recess 11h.

  With reference to FIG. 5A or 5B, when the collar 21f is gripped and the engaging pin 21 is pulled up against the elastic force of the compression coil spring 22, the gripping claw 71a or the gripping claw 71b can be accommodated in the recess 11h (see FIG. 1). When the flange 21f is released, the tip of the engagement pin 21 can be brought into contact with the gripping claw 71a or the gripping claw 71b from the surface opposite to the gripping surface of the gripping claw 71a or the gripping claw 71b. The gripping claw 71a or the gripping claw 71b is preferably provided with a recess 7d into which the tip of the engagement pin 21 enters (see FIG. 1).

  Referring to FIG. 5B or 5C, the shaft portion 21s protrudes the locking pin 21p in the centrifugal direction. On the other hand, a slit-shaped groove 21m for guiding the locking pin 21p in the axial direction of the shaft portion 21s is provided inside the cylindrical portion 2p.

  With reference to FIG. 5 (B) or FIG. 5 (C), when the collar portion 21f is gripped and the engagement pin 21 is pulled up, the locking pin 21p can be moved to a height exceeding the upper end edge of the cylindrical portion 2p. . When the engaging pin 21 is rotated in the outer peripheral direction, the locking pin 21p can be brought into contact with the upper end edge of the cylindrical portion 2p. Accordingly, the state in which the engagement pin 21 is pulled up can be maintained, and after the gripping claw 71a or the gripping claw 71b is received in the recess 11h, the engagement pin 21 is rotated in the reverse direction, whereby the adapter body 1 is gripped. It can be fixed to 71a or grip claw 71b.

(Composition of plug fitting)
Referring to FIG. 1 or FIG. 2 and FIG. 4, the insertion fitting 3 is formed in an L shape by bending a belt-shaped metal plate at a substantially right angle. One piece 31 of the insertion fitting 3 is accommodated in the recess 12h. Further, the piece 31 of the insertion fitting 3 is urged by the urging member 4 and held in the recess 12h.

  Referring to FIG. 2, the other piece of the insertion fitting 3 has a claw piece 32 having a tip edge formed at an acute angle. Referring to FIG. 1, the pair of claw pieces 32 and 32 are disposed so as to face each other at the distal end portion of the adapter main body 1. When the pair of gripping arms 7a and 7b are closed, the pair of claw pieces 32 and 32 can be inserted between the nut 9n and the nut drop prevention cap 9c (see FIG. 1). The claw piece 32 has a semicircular arc-shaped first relief portion 321 that escapes the bolt member 9b in a state where the pair of gripping arms 7a and 7b are closed (see FIG. 2).

(Configuration of biasing member)
Referring to FIG. 1, FIG. 2, and FIG. 4, the urging member 4 is configured by a leaf spring in which both end portions are in contact with the inner wall of the recess 12 h and the center portion is in contact with one piece 31 of the insertion fitting 3. The urging member 4 is accommodated in the recess 12h. The urging member 4 urges the force to insert the claw piece 32 between the nut 9n and the nut drop prevention cap 9c (see FIG. 1).

(Configuration of cap member)
Referring to FIGS. 1 to 4, the cap member 5 is made of a synthetic resin having an insulating property, and is formed in a box shape having an open bottom surface and one side surface. The cap member 5 covers the distal end side of the adapter main body 1 except for the facing surface 10a. Further, the cap member 5 is formed with a semicircular arc-shaped second relief portion 51 that escapes the nut 9n on the upper surface wall with the pair of gripping arms 7a and 7b closed (FIG. 2 or FIG. 3A). reference).

  Referring to FIG. 2, the cap member 5 has a pair of lances 5r and 5r that protrude from the inner wall of the cap member 5 and face each other. On the other hand, the adapter main body 1 is formed with a pair of locking holes 1h and 1h that open in opposite directions on both side surfaces on the distal end side. When the cap member 5 is pushed in from the distal end side of the adapter main body 1, the lance 5 r can be locked in the locking hole 1 h and the cap member 5 can be fixed to the distal end portion of the adapter main body 1.

  With reference to FIGS. 1 to 4, by covering the distal end portion of adapter body 1 with cap member 5, a short circuit with a charging portion can be suppressed when insulating operation rod 70 is operated. Moreover, the cap member 5 prevents the insertion fitting 3 from falling off (see FIG. 1).

(Configuration of insulation operation rod)
Next, the configuration of the insulating operation rod according to the present invention will be described. FIG. 6 is a front view showing an example of an insulating operating rod according to the present invention, FIG. 6 (A) shows the base end side of the insulating operating rod, and FIG. 6 (B) shows the tip of the insulating operating rod. The part side is shown. FIG. 7 is an enlarged front view of the distal end portion of the insulating operation rod shown in FIG.

  Referring to FIG. 6 or FIG. 7, an insulating operation rod (so-called insulating Yatco) 70 serving as an indirect live tool is composed of a long operation rod 71 and a gripping tool 72. The gripping tool 72 is detachably attached to the distal end portion of the operation rod 71. Further, the insulating operation rod 70 includes an operation rod 73. The insulating operation rod 70 has an insulating property secured so that an intermediate portion between the operation rod 71 and the operation rod 73 is connected by an insulating plastic pipe or the like and is suitable for the indirect hot wire method.

  Referring to FIG. 6 or FIG. 7, the gripping tool 72 is composed of a pair of curved gripping arms 7a and 7b that open and close. One gripping arm 7a is a fixed arm with a base end fixed, and the other gripping arm 7b rotates around a rotation shaft 7c provided at the base end of one gripping arm 7a. It is a movable arm.

  Referring to FIG. 6 or FIG. 7, the operation bar 73 is held along the operation bar 71. The distal end portion of the operating rod 73 is rotatably connected to the other gripping arm 7b. And if the operating lever 74 provided in the hand-held part of the action | operation stick | rod 73 is operated, the other holding arm 7b can be opened and closed with respect to one holding arm 7a.

  Referring to FIG. 7, when the operation lever 74 is grasped and the operation lever 74 is brought close to the operation rod 71, the other gripping arm 7b can be closed with respect to the one gripping arm 7a. When the operation lever 74 is released, the other gripping arm 7b can be opened with respect to one gripping arm 7a by the force of a spring (not shown) connected to the control lever 74. FIG. 7 shows a state in which the other gripping arm 7b is opened to the maximum with respect to one gripping arm 7a.

  Referring to FIG. 7, one gripping arm 7a projects a tapered gripping claw 71a. The gripping claw 71a forms a gripping surface 70a. The gripping surface 70 a is disposed substantially parallel to the axis center Q of the operation rod 71. Similarly, the other gripping arm 7b projects a tapered gripping claw 71b. The gripping claw 71b forms a gripping surface 70b. The gripping surface 70b is arranged with a predetermined opening angle with the gripping surface 70a. With reference to FIG. 6 or FIG. 7, when the operation lever 74 is gripped, the gripping surface 70b can be brought close to the gripping surface 70a.

[Operation of adapter for indirect hot wire construction]
Next, the operation and effect of the adapter 10 will be described while explaining the operation method of the adapter 10 according to the embodiment. FIG. 8 is a front view showing the configuration of the adapter for indirect hot-wire work according to the embodiment, in which the pair of gripping arms are attached to the pair of gripping arms with a predetermined angle. FIG.

  With reference to FIGS. 1 to 5, the adapter 10 can be fixed with the engaging pin 21 by inserting the gripping claw 71 a or the gripping claw 71 b into the recess 11 h (see FIG. 5). In the pair of adapters 10 and 10, a nut drop prevention cap 9c can be disposed between a pair of opposed surfaces 10a and 10a facing each other. By disposing the claw piece 32 at the tip of the adapter body 1, the claw piece 32 can be inserted between the nut 9n and the flange portion 91c of the nut drop prevention cap 9c (see FIG. 1).

  From the state shown in FIG. 8, when the insulating operation rod 70 is lifted, the operation lever 74 is gripped, and the operation lever 74 is brought close to the operation rod 71 (see FIG. 6), one adapter 10 is compared with the other adapter 10. Can be closed (see FIG. 1). In the state shown in FIG. 1, a pair of claw pieces 32 and 32 can be inserted between the nut 9n and the flange 91c of the nut drop prevention cap 9c (see FIG. 1). The nut drop prevention cap 9c can be moved by the thickness of the claw piece 32 with respect to the nut 9n.

  Next, referring to FIG. 1 or FIG. 3, when the insulating operation rod 70 is pulled down while the pair of adapters 10 and 10 are kept closed, the nut drop prevention cap 9c can be removed from the bolt member 9b. Referring to FIG. 1 or FIG. 2, in the process of pulling down the insulation operating rod 70, the nut drop prevention cap 9c can be dropped inside the pair of first cutout grooves 10b, 10b, and the pair of second cutout grooves 10c, The bottom face of 10c can be closed to accommodate the nut drop prevention cap 9c.

  As described above, the adapter 10 according to the embodiment includes the claw pieces 32 that are opposed to each other at the distal end portion of the adapter body 1 and can be inserted between the nut 9n and the nut drop prevention cap 9c. -When 7b is closed, the pair of claw pieces 32, 32 can be inserted between the nut 9n and the nut drop prevention cap 9c, and the insulating operation rod 70 is pulled down with the pair of gripping arms 7a, 7b closed. Thus, the nut drop prevention cap 9c can be reliably and easily removed from the bolt member 9b.

  Moreover, the adapter 10 according to the embodiment can accommodate the nut drop prevention cap 9c between the pair of adapter bodies 1 and 1, and can prevent the nut drop prevention cap 9c from being accidentally dropped.

The adapter for indirect hot wire construction according to the present invention has the following effects.
(1) The nut drop prevention cap can be easily removed by using an existing insulation operation rod (so-called insulation yarn).
(2) Since a kama-type knife is not used, it is safe and the nut drop prevention cap can be reliably removed.
(3) The nut drop prevention cap can be reused.
(4) The inadvertent drop of the nut drop prevention cap can be prevented.

  Although the present invention has disclosed an adapter for indirect hot-wire construction that can indirectly hot-wire high-voltage distribution lines in an uninterruptible state using an insulating operation rod or the like, the adapter of the present invention is used for indirect hot-wire construction. Without being limited, it is expected to be applied in other fields.

DESCRIPTION OF SYMBOLS 1 Adapter main body 2 Locking means 3 Plug fitting 7a * 7b A pair of holding arm 9b Bolt member 9c Nut drop prevention cap 9n Nut 10 Adapter (indirect hot-line construction adapter)
10a Opposing surface 10b First notch groove 11h Recess (recess of adapter body)
70 Insulating operation rod 71a Grip claw 71b Grip claw 321 First relief

Claims (5)

A set of nuts that are attached to a pair of open and closed curved gripping arms provided at the tip of the insulating operation rod and that can be removed from the bolt members to prevent the nuts coming off the bolts that are fastened to the bolt members extending downward. An indirect hot-wire construction adapter configured,
A block-shaped adapter body having a concave portion into which a gripping claw protruding in the centrifugal direction from the gripping arm can be inserted, and a bottom surface;
A locking means that is attached to the adapter body and fixes the gripping claw from a surface opposite to the gripping surface of the gripping claw,
An L-shaped insertion fitting that holds a piece inside the adapter body, faces each other at the tip of the adapter body, and has a claw piece that can be inserted between the nut and the nut drop prevention cap as another piece. And comprising
The adapter body is
Opposing surfaces that face each other and are close to each other so that they can be closely attached,
A semicircular arc-shaped first notch groove in which the nut drop-off prevention cap can be dropped in a state where the pair of gripping arms are closed, formed on the opposing surfaces;
The claw piece is an adapter for indirect hot-wire work having a semicircular arc-shaped first escape portion that escapes the bolt member at a distal end edge with the pair of gripping arms closed.   2. The adapter body has a semicircular arc-shaped second notch groove on the facing surface, the bottom surface of which is closed so that the nut drop-off prevention cap can be accommodated with the pair of gripping arms closed. Adapter for indirect hot wire construction as described.   3. The adapter for indirect hot-wire construction according to claim 1, wherein the adapter main body includes a biasing member for biasing a force for inserting the claw piece between the nut and the nut drop prevention cap. Excluding the facing surface, further comprising an insulating cap member covering the tip end side of the adapter body,
The indirect hot wire according to any one of claims 1 to 3, wherein the cap member has a semicircular arc-shaped second escape portion that escapes the nut on the upper surface wall with the pair of gripping arms closed. Adapter for construction. The locking means is
An engagement pin that can protrude from the concave portion and abut the gripping claw from the surface opposite to the gripping surface of the gripping claw,
The indirect hot wire construction according to any one of claims 1 to 4, further comprising: a compression coil spring that is held inside the adapter body and biases the force of the engagement pin toward the gripping claw. adapter.

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