JP2009177898A - Earth short-circuiting tool - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an earth short-circuiting tool by which the attachment of a connector on the electric path side to an electric path becomes easy, and removal therefrom becomes easy, and also it is possible to surely attach the connector on the electric path side to the electric path. <P>SOLUTION: This earth short-circuiting tool is equipped with the connector on the electric path side which is attached and fixed to the conductor of the electric path with its power cut, an earth tool on the earth side which is earthed to an earth pole buried underground, and a cable for a short circuit which connects the earth tool on the electric path side with the earth tool on the earth side. The earth tool on the electric path side is equipped with a fixed arm which is integrated with the earth tool on the electric path side, a movable arm which is provided rotatably in the earth tool on the electric path side and formed to be able to catch a lead wire together with the fixed arm, and a lock part which is coupled with the movable arm and limits the rotation of the movable arm. The lock part permits the rotation of the movable arm in a closed direction where the movable arm and the fixed arm sandwich a conductor, and also regulates the rotation of the movable arm in an open direction where the movable arm and the fixed arm release the sandwiching of the conductor. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a ground short-circuit apparatus that prevents an electric shock or the like of a construction worker.

  Conventionally, when conducting electrical work on high-voltage lines or inspection of electric power facilities where high-voltage lines are arranged, the high-voltage lines are not charged (power outages) to ensure the safety of construction workers. Work is done. And, for example, the construction worker shall be grounded at both ends of the electric circuit so that the electric worker will not get an electric shock or damage the equipment even if the electric circuit is charged due to erroneous energization or induction current. I was working with a shorting device. In addition, the installation of grounding short-circuiting equipment is stipulated by the laws and regulations related to occupational safety, and is required for electrical work and inspection of electric power equipment, etc., in which the electric circuit is carried out without charging.

Here, the earthing short circuit device is generally an electric circuit side connection device that is attached and fixed to an electric wire of an uncharged electric circuit, a ground side connection device that is connected to a grounding electrode embedded in the ground, an electric circuit side and a ground side connection device. And a cable connecting between the two. Each of the electric circuit side and the ground side connector needs to be firmly fixedly connected to the target electric wire and the grounding electrode so as not to be easily detached due to vibration generated during the construction. In particular, since the electric circuit side connection tool may be shaken by wind or the like, it is necessary to firmly attach it to the electric wire. In recent years, the electric wire side connection tool has a wire connection clamp provided with a connection clamp at the tip. A grounding short circuit device has been used (for example, see Patent Document 1).
JP 2001-198124 A

  However, since the wire connection clamp described in Patent Document 1 has a bolt tightening structure for attachment to the electric wire, the attachment of the wire connection clamp is a very complicated operation for the construction worker. In particular, the wire connection clamp needs to be firmly tightened, so that it is difficult to remove the clamp after completion of the construction or at the time of movement. Conversely, for example, there is a problem that it is dangerous when the wire connection clamp is easily removed.

  In addition, there are cases where the position of the electric wire is lowered when the electric wire is shaken by wind or the like, or due to the weight of the grounding short circuit device. In this case, it is necessary to change the work position depending on the work place and work situation, and there is a problem that time is required for the work. Also, if the work position for attaching and detaching the conventional grounding short-circuiting device is performed at a position other than immediately below the attachment location, the physical burden on the construction worker increases due to the weight of the hot stick, and the construction worker is also fatigued. There was a problem of getting bigger.

  The present invention has been made in view of the above problems, and is capable of easily attaching and detaching the electric circuit side connector to the electric circuit, and capable of reliably attaching the electric circuit side connector to the electric circuit. The purpose is to provide.

  The present inventors make it possible to hold an electric wire between a fixed arm and a movable arm that can be rotated, and by restricting the rotation of the movable arm, it is easy to attach and detach to and from the electric circuit. The inventors have found that a structure that does not deviate can be obtained, and have completed the present invention. Specifically, it aims at providing the following earthing | grounding short circuit instruments.

  (1) Connect the electric circuit side connector that is attached and fixed to the conductor of the electric circuit subjected to the power failure, the ground side connector that is grounded to the grounding electrode embedded in the ground, and the electric circuit side connector and the ground side connector. A grounding short-circuit instrument comprising: a main body part; a fixed arm integrally formed with the main body part; and a movable arm rotatably provided on the main body part. And a movable arm formed so that the conductor can be gripped by the movable arm and the fixed arm, and a lock portion connected to the movable arm and restricting the rotation of the movable arm. And an opening direction in which the movable arm and the fixed arm allow the movable arm to rotate in a closing direction in which the conductor grips the conductor, and the movable arm and the fixed arm release the grip of the conductor. Said yes to Ground short-circuit device for regulating the rotation of the arm.

  Here, the closing direction refers to a direction in which the movable arm is rotated in a direction in which the conductor is sandwiched between the fixed arm and the movable arm. Further, the opening direction refers to a direction in which the movable arm is rotated in a direction in which the sandwiched conductor is released.

  (2) The lock portion includes a ratchet gear and a locking claw urged toward the ratchet gear, and the locking claw holds the ratchet gear and the locking claw. The ground short-circuit apparatus according to (1), wherein a lock releasing unit for releasing is provided.

  (3) The grounding short circuit instrument according to (2), wherein the ratchet gear is provided with a support portion formed integrally with the ratchet gear, and the support portion is provided with a predetermined hook portion.

  (4) In any one of (1) to (3), the electric path side connector is provided with an insertion portion capable of inserting a predetermined rod member at an end opposite to the side on which the fixed arm is formed. The ground short-circuit apparatus of crab.

  (5) The cable is provided with a connecting portion capable of connecting a plurality of electric circuit side connectors, and each cable in the connecting portion is formed so as to be removable. Any one of (1) to (4) Grounding short-circuit apparatus as described in.

  ADVANTAGE OF THE INVENTION According to this invention, while being easy to attach and detach an electric circuit side connection tool to an electric circuit, the grounding short circuit instrument which can attach an electric circuit side connection tool to an electric circuit reliably can be provided.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, embodiment of this invention is not limited to the following Example at all, and the technical scope of this invention is not limited to this.

  FIG. 1 is a front view of a ground short-circuit instrument according to a first embodiment of the present invention. FIG. 2 is a side view of the electric circuit side connector according to the embodiment. FIG. 3 is a front view of the electric circuit side connector according to the embodiment. FIG. 4 is a rear view of the electric circuit side connector according to the embodiment. FIG. 5 is a partial cross-sectional view showing a locked state in the lock mechanism of the electric circuit side connector according to the embodiment. FIG. 6 is a partial cross-sectional view showing an unlocked state in the lock mechanism of the electric circuit side connector according to the embodiment.

[First Embodiment]
1. Overall Configuration As shown in FIG. 1, the grounding and short-circuiting device 1 according to the first embodiment is a short-circuit fitting that is a circuit-side connector that is attached and fixed to an electric wire 101 (see FIGS. 7 and 8) that is a non-charged circuit. 2, a grounding fitting 6 that is a ground-side connection tool connected to a grounding electrode (not shown) embedded in the ground, and a cable 7 that connects the short-circuiting fitting 2 and the grounding fitting 6.

  The short-circuit fitting 2 is made of a conductive material, and in the present embodiment, includes a first short-circuit fitting 2A, a second short-circuit fitting 2B, and a third short-circuit fitting 2C. The first short-circuit bracket 2A, the second short-circuit bracket 2B, and the third short-circuit bracket 2C are electrically connected to one ends of the short-circuit cables 71, 72, and 73, respectively. The other ends of the short-circuit cables 71, 72, 73 are all electrically connected to the connecting portion 70 of the cable 7. The first short-circuit fitting 2A, the second short-circuit fitting 2B, and the third short-circuit fitting 2C are detachably formed on the electric wire 101. As described above, the short-circuit fitting 2 according to the present embodiment constitutes one short-circuit fitting with the first, second, and third short-circuit fittings 2A, 2B, and 2C as one set.

1-2. First short circuit bracket (second short circuit bracket and third short circuit bracket)
The first short-circuit fitting 2A is a fitting similar to the second short-circuit fitting 2B and the third short-circuit fitting 2C, and is a support bar that holds the second and third short-circuit fittings 2B and 2C and integrates with the first short-circuit fitting 2A. 9 is different from the second and third short-circuit fittings 2B and 2C. The support bar 9 is made of an alloy coated with vinyl chloride, and is detachably assembled to the first short-circuit fitting 2A. Hereinafter, the first short-circuit fitting 2A from which the support bar 9 has been removed will be described.

  As shown in FIGS. 2 to 4, the first short-circuit fitting 2 </ b> A includes a grip portion 3 that grips the electric wire 101, a lock portion 4 that has a lock mechanism that regulates the grip state of the electric wire 101 in the grip portion 3, and A common operation bar 102 (see FIG. 7) that is a bar member, and a fitting insertion part 5 formed so as to be capable of being fitted.

  The grip portion 3 includes a fixed arm 31 formed integrally with the first short-circuit fitting 2A, and a movable arm 32 provided rotatably on the first short-circuit fitting 2A. The fixed arm 31 has two arms, a first fixed arm 31a and a second fixed arm 31b, in order to securely hold the electric wire 101 together with the movable arm 32. The first fixed arm 31a and the second fixed arm 31b are formed in a shape in which, when the electric wire 101 is gripped, the side in contact with the electric wire 101 is inclined toward the movable arm 32 side.

  For example, as shown in FIGS. 3 and 4, the movable arm 32 is disposed so as to be sandwiched between the first fixed arm 31 a and the second fixed arm 31 b. In addition, the movable arm 32 is attached so as to be rotatable about an arm support shaft 33 provided on the fixed arm 31 so as to communicate the first fixed arm 31a and the second fixed arm 31b. An operation rod 8 for operating the rotation of the movable arm 32 is connected to one end of the movable arm 32 in the vicinity of the arm support shaft 33. The operation rod 8 is a ratchet provided in the lock unit 4 described later. The support part 42 integrated with the gear 41 is connected. The operation rod 8 is connected by inserting a connection pin 81 into connection holes 32a and 8a provided in the movable arm 32 and the operation rod 8.

  The other end side of the movable arm 32 (on the side opposite to the connecting hole 32a with the arm support shaft 33 as the center) has a shape curved toward the fixed arm 31 so that the electric wire 101 wired to the utility pole 100 can be gripped. Yes. In this way, by using the fixed arm 31 inclined to the movable arm 32 side and the movable arm 32 curved to the fixed arm 31 side, the movable arm 32 is rotated around the arm support shaft 33, whereby the electric wire 101 is connected. In addition to being able to grip, for example, it is possible to securely grip even the electric wires 101 having different diameters.

  The movable arm 32 is formed to be exchangeable for its size (for example, an arm having a different curvature radius) by pulling out the arm support shaft 33. In other words, the arm support shaft 33 is provided so that it can be pulled out, so that the movable arm 32 can be replaced. The movable arm 32 is provided with a plurality of through holes (not shown) that allow the arm support shaft 33 to pass therethrough. By inserting the arm support shaft 33 into the through hole, the radius of curvature of the movable arm 32 can be increased. You may adjust.

  The fitting insertion portion 5 is formed with an engaging groove 51 in which a pair of protruding pins (not shown) provided at the tip of the common operation rod 102 can be engaged. Here, the shared operation rod 102 is manufactured by an insulator such as FRP, and has a double structure having an inner cylinder and an outer cylinder. The outer cylinder is formed to be slidable within a certain range with respect to the inner cylinder, and a protruding pin that can be engaged with the engaging groove 51 of the fitting insertion portion 5 is formed at the tip of the inner cylinder. The shared operation rod 102 is connected to the first short-circuit fitting 2 </ b> A by fitting the inner cylinder in the fitting insertion portion 5 and engaging the protruding pin in the engagement groove 51.

1-2-1. Lock part As shown in FIGS. 5 and 6, the lock part 4 is arranged inside the first cover 40, the ratchet gear 41 mounted around the rotation shaft 41 a, and the inside of the second cover 43. And a latching claw 44 that is detachably disposed on the ratchet gear 41.

  The ratchet gear 41 is formed such that teeth are inclined in the direction of arrow A shown in FIG. 5 and is urged by a leaf spring (not shown) in the direction of arrow A. The ratchet gear 41 is integrally provided with a support portion 42 connected to the operation rod 8, and the rotation of the ratchet gear 41 (rotation of the support portion 42) and the operation of the operation rod 8 (for example, pulling). And extrusion). The support portion 42 is provided with a U-shaped bolt 48 that is a hook portion for rotating the ratchet gear 41. The U-shaped bolt 48 is connected in a state of being inserted through an insertion hole 48 a formed at the end of the support portion 42.

  The locking claw 44 is urged by a spring 45 in the direction of arrow B shown in FIG. As a result, the tip of the locking claw 44 is always locked to the ratchet gear 41. Further, the engaging claw 44 is provided with an engaging convex portion 46 that engages with the guiding groove 21 provided in the first short-circuit fitting 2A in the direction of the arrow B. The engaging claw 44 is provided with this guiding claw 44. The groove 21 slides in a state where the engaging convex portion 46 is engaged. Further, the locking claw 44 is provided with a lock release portion 47 formed in a notch shape. As shown in FIG. 6, the unlocking portion 47 engages the tip 103a of the operating rod having a convex portion at the tip like the bind hammer 103, and presses the locking claw 44 in the direction opposite to the arrow B direction. By doing so, the ratchet gear 41 and the locking claw 44 are unlocked.

  By configuring the locking mechanism in this manner, in the state where the tip of the locking claw 44 is locked to the ratchet gear 41, as shown in FIG. 5, the ratchet gear 41 is opposite to the arrow A direction in FIG. Rotation in the direction (rotation of the support portion 42 in the direction of the arrow C) is allowed, but rotation of the ratchet gear 41 in the direction of the arrow A (in the direction opposite to the direction of the arrow C of the support portion 42). Rotation) is prevented. On the other hand, when the tip of the locking claw 44 is not locked to the ratchet gear 41 (by operating the unlocking portion 47 with the operation rod (bind hammer 103), the locking claw 44 is moved to the arrow in FIG. 6), the ratchet gear 41 is urged in the direction of the arrow A as shown in FIG. 6, so that the ratchet gear 41 rotates in the direction of the arrow A and is supported. The part 42 is rotated in the direction opposite to the arrow C direction.

1-3. Grounding Bracket The grounding bracket 6 includes a pair of electrode rod members 61 and 62 made of a conductive plate material such as a vertically long copper plate bent so that the longitudinal section thereof is substantially U-shaped. The electrode rod members 61 and 62 are formed with extending portions extending in the direction approaching each other between the front end portions 61a and 62a on one end side and the rear end portions 61b and 62b on the other end side. It is connected so as to be relatively rotatable by a rotation shaft 63 provided in the section. As a result, the rear end portions 61b and 62b are separated from each other when the opposing portions of the front end portions 61a and 62a are brought into contact with each other, and conversely, the front end portions 61a and 62a are separated from each other when the rear end portions 61b and 62b are approached. .

  A spring (not shown) for urging each of the electrode rod members 61 and 62 is attached to the electrode rod members 61 and 62, and the springs are rear end portions 61b and 62b of the electrode rod members 61 and 62. Energize by applying elastic force in the direction of separating the.

  Further, the electrode rod members 61 and 62 are formed such that the portions of the tip portions 61a and 62a facing each other are formed in a wave shape having a similar shape and the convex portions are abutted against each other. Further, anti-slip grips 61c and 62c made of an insulating resin material are attached to the rear end portions 61b and 62b.

  As a result, the grounding metal 6 grips the grips 61c and 62c and rotates the electrode rod members 61 and 62 about the rotation shaft 63 against the elastic force of the spring to bring the rear end portions 61b and 62b closer. As a result, the tip portions 61a and 62a are separated from each other, and the ground electrode can be positioned therebetween. After this, the gripping force of the grips 61c and 62c is loosened, and the rear end portions 61b and 62b are separated by the elastic force of the spring, so that the front end portions 61a and 62a of the electrode rod members 61 and 62 approach. It becomes possible to sandwich the ground electrode between them.

1-4. Cable The cable 7 is composed of a short-circuit cable and a ground cable. The short-circuit cable includes a first cable 71 joined to the first short-circuit fitting 2A, a second cable 72 joined to the second short-circuit fitting 2B, and a third cable 73 joined to the third short-circuit fitting 2C. Composed. The ground cable is composed of a fourth cable 74 joined to the ground metal fitting 6. The first cable 71, the second cable 72, the third cable 73, and the fourth cable 74 are connected at the connecting portion 70. The connecting portion 70 is covered and insulated by a connecting portion cover 75 made of vinyl chloride. In the present embodiment, a stranded wire coated with vinyl chloride is used for the short-circuit cable and the ground cable.

2. Usage method Next, the usage method of the earthing | grounding short-circuit instrument 1 which concerns on the said embodiment is demonstrated using FIGS. 7-9. FIG. 7 is a diagram illustrating a state in which the electric wire side connector of the ground short-circuiting device 1 is gripped by the electric wire 101. FIG. 8 is a diagram illustrating a state in which the electric circuit side connection tool of the ground short-circuit instrument 1 is locked to the electric wire 101. 9A is a partially enlarged view according to A of FIG. 8 at the time of locking, and FIG. 9B is a partially enlarged view according to A of FIG. 8 at the time of unlocking.

  First, before connecting the short-circuit fitting 2 to the electric wire 101 that is an uncharged electric circuit wired to the utility pole 100, a grounding electrode (not shown) in which the grounding fitting 6 fixed to the end of the cable 7 is buried in the ground. To the bucket 111 of the construction vehicle 110 connected to At this time, if this connection is not ensured, there is a risk of an accident due to an electric shock or the like. Moreover, the short-circuit metal fitting 2 is good to arrange | position the short-circuit metal fitting 2 connected to the electric wire 101 beforehand according to the number of the electric wires 101, and to make it connect in the connection part 70. FIG.

  In order to attach the short-circuit fitting 2 to the electric wire 101, first, the state of obstacles and the like around the electric wire 101 to be attached is confirmed, and the direction in which the short-circuit fitting 2 is approached to the electric wire 101 is determined. Then, the bucket 111 is moved according to the situation. At this time, for example, when the grounding metal 6 is directly connected to a grounding electrode (not shown) in the ground, one construction worker may guide the cable 7 so that the grounding metal 6 is not detached. .

  Next, the construction worker inserts the common operation rod 102 into the insertion portion 5 of the short-circuit fitting 2 and prepares for an approach. Specifically, the common operation rod 102 is fitted to the fitting insertion portion 5, and the protruding pin of the inner cylinder of the common operation rod 102 is engaged with and engaged with the engagement groove 51 of the fitting insertion portion 5. In addition, it is good to integrate the 2nd short circuit metal fitting 2B and the 3rd short circuit metal fitting 2C in the state which made the support rod 9 attached to the 1st short circuit metal fitting 2A hold | grip a holding part.

  In this state, the construction worker brings the electric wire 101 between the fixed arm 31 and the movable arm 32 in the vicinity of the uncharged electric wire (conductor of the electric circuit) 101. When the electric wire 101 is inserted between the fixed arm 31 and the movable arm 32, the construction worker hooks the tip 103 a of the bind hammer 103 on the U-shaped bolt 48 while supporting the shared operation rod 102 with one hand. When two construction workers are on board the bucket 111, the other construction workers on the bucket 111 have the binding hammer 103, and the tip 103a of the binding hammer 103 is connected to the U-shaped bolt. You may work on 48. When the tip 103a of the bind hammer 103 is caught by the U-bolt 48, the construction operator operates the operation rod 8 by pulling the bind hammer 103 toward the front side, and rotates the movable arm 32 in the closing direction. Thereby, the first short-circuit fitting 2 </ b> A is held by the electric wire 101.

  Here, the operation of the first short-circuit fitting 2A when the first short-circuit fitting 2A grips the electric wire 101 will be described. As shown in FIG. 9A, the construction worker hooks the tip 103a of the bind hammer 103 on the U-shaped bolt 48 of the first short-circuit fitting 2A, and moves the bind hammer 103 in the direction of arrow C in FIG. 9A. When pulled, the ratchet gear 41 rotates in the direction opposite to the arrow A direction, and the support portion 42 rotates in the direction opposite to the arrow A direction. When the support portion 42 rotates in the direction opposite to the arrow A direction, the operation rod 8 is pulled in the arrow C direction. When the operating rod 8 is pulled in the direction of the arrow C, the movable arm 32 connected to the operating rod 8 is also pulled in the direction of the arrow C. Here, as shown in FIG. 2, the movable arm 32 is pivotally attached to the first short-circuit fitting 2 </ b> A around the arm support shaft 33, so that the connected side is pulled toward the arrow C direction. Then, the bending portion side rotates in the closing direction (fixed arm 31 side) about the arm support shaft 33. Thereby, the electric wire 101 is gripped.

  At this time, the locking claw 44 is urged toward the ratchet gear 41 while being locked to the ratchet gear 41, and therefore the rotation of the ratchet gear 41 in the direction of the arrow A is restricted. Thereby, even after the electric wire 101 is held, the first short-circuit fitting 2A can be reliably held without being easily unlocked.

  Next, a method for removing the short-circuit metal fitting 2 after completion of construction will be described. As shown in FIG. 9B, the first short-circuit fitting 2A is unlocked by pressing the lock release portion 47 of the locking claw 44 in the direction opposite to the arrow B in FIG. 9B. Specifically, when the unlocking portion 47 is pressed by the tip 103a of the bind hammer 103 in the direction opposite to the arrow B direction, the locking claw 44 moves in the direction opposite to the arrow B direction and engages with the ratchet gear 41. The engagement with the tip of the pawl 44 is released. When this locking is released, the ratchet gear 41 urged in the direction of the arrow A rotates in the direction of the arrow A, and the support portion 42 formed integrally with the ratchet gear 41 also moves in the direction of the arrow A. To turn. When the support part 42 rotates in the direction of the arrow A, the operating rod 8 connected to the support part 42 is pushed out in the direction opposite to the direction of the arrow C.

  When the operating rod 8 is pushed out in the direction opposite to the arrow C direction, the movable arm 32 connected to the operating rod 8 is also pushed out in the direction opposite to the arrow C direction. Here, since the movable arm 32 is rotatably attached to the first short-circuit fitting 2A around the arm support shaft 33, the connecting portion side is pushed out in the direction opposite to the direction of the arrow C, whereby the bending portion The side rotates about the arm support shaft 33 in the opening direction (the direction opposite to the fixed arm 31). Thereby, the grip of the electric wire 101 is released. At this time, when the release of the unlocking portion 47 is released, the tip of the locking claw 44 is locked again to the ratchet gear 41, so that the wire 101 is locked in the released state. Become.

[Other Embodiments]
Next, a ground short-circuit instrument 1A according to another embodiment of the present invention will be described. In the following embodiments, parts that are not particularly described are the same as those in the first embodiment, and the same reference numerals are given to the numbers given in the drawings if they are the same as those in the first embodiment.

  FIG. 10 is a view showing a ratchet mechanism that is a lock mechanism in the lock portion 4 of the ground short-circuit instrument 1A according to another embodiment. As shown in FIG. 10, the lock unit 4 may be configured by a ratchet mechanism. That is, the first short-circuit fitting 2A is slidably formed, and the ratchet formed on the first short-circuit fitting 2A is swingable instead of providing the latching claw 44 biased toward the ratchet gear 41 side. A claw 44A may be provided. In this case, the ratchet pawl 44A is urged toward the ratchet gear 41 side, and latches the ratchet gear 41. When the lock is released, the ratchet pawl 44A is lifted to the side opposite to the ratchet gear 41 side. Thus, the lock can be released. The ratchet gear 41 is preferably in a state of being biased in the direction of arrow A shown in FIG.

  Thus, according to this embodiment, since the fixed arm 31 and the movable arm 32 are provided and the electric wire 101 is held by the fixed arm 31 and the movable arm 32, the electric wire 101 can be easily held. .

  In addition, since the gripping structure is provided, the electric wire 101 can be gripped regardless of the work position, for example, not only from directly below but also from the side.

  In addition, since the lock mechanism that locks the rotation of the movable arm 32 is provided, the electric wire 101 can be securely gripped and can be easily detached.

  Further, since the locking and unlocking can be performed by pulling the U-shaped bolt 48, the wire 101 can be gripped if even the U-shaped bolt 48 can be pulled.

  In addition, since the lock portion 4 is provided on the back side of the operation rod 8, it is possible to prevent malfunction such as unlocking by mistake.

  As a result, the burden on the operator is reduced and the work efficiency can be improved.

  In the present embodiment, the short-circuit fitting 2 includes the three short-circuit fittings 2 of the first, second, and third short-circuit fittings 2A, 2B, and 2C. However, the present invention is not limited to this. For example, the short-circuit metal fitting 2 may be only the first short-circuit metal fitting 2A, or the first short-circuit metal fitting 2A and the second short-circuit metal fitting 2B.

  In the present embodiment, the fixed arm 31 includes two fixed arms including the first fixed arm 31a and the second fixed arm 31b. However, the present invention is not limited to this. For example, it may be composed of only the first fixed arm 31a.

It is a front view of the earthing short circuit instrument concerning a 1st embodiment of the present invention. It is a side view of the electric circuit side grounding tool which concerns on the said embodiment. It is a front view of the electric circuit side grounding tool which concerns on the said embodiment. It is a rear view of the electric circuit side grounding tool which concerns on the said embodiment. It is a fragmentary sectional view which shows a locked state in the locking mechanism of the electric circuit side grounding tool which concerns on the said embodiment. It is a fragmentary sectional view which shows a non-locking state in the locking mechanism of the electric circuit side grounding tool which concerns on the said embodiment. It is a figure which shows the state which makes an electric wire hold | grip the electric circuit side grounding tool of a grounding short circuit instrument. It is a figure which shows the state which locks the electric circuit side grounding tool of a grounding short circuit instrument to an electric wire. (A) is the elements on larger scale concerning A of Drawing 8 at the time of lock, and (B) is the elements on larger scale concerning A of Drawing 8 at the time of lock release. It is a figure which shows the ratchet mechanism which is a locking mechanism of the earthing | grounding short circuit instrument which concerns on other embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Grounding short circuit instrument 2 Shorting metal fitting 3 Clamping part 4 Locking part 5 Insertion part 6 Grounding metal part 7 Shorting cable 8 Operation rod 9 Support rod 31 Fixed arm 32 Movable arm 41 Ratchet gear 42 Support part 44 Locking claw 47 Unlocking part 48 U-shaped bolt 101 Electric wire 102 Shared operation rod 103 Bind hammer

Claims (5)

A circuit-side connector that is attached and fixed to the conductor of the circuit that has been interrupted,
A ground-side connector that is grounded to a grounding electrode embedded in the ground;
A cable for connecting the electrical path side connection tool and the ground side connection tool, and a ground short-circuit instrument comprising:
The electric circuit side connector is
The main body,
A fixed arm formed integrally with the main body,
A movable arm rotatably provided on the main body, and the movable arm formed so that the conductor can be gripped by the movable arm and the fixed arm;
A lock portion connected to the movable arm and restricting the rotation of the movable arm,
The lock portion allows the movable arm to rotate in a closing direction in which the movable arm and the fixed arm grip the conductor, and the movable arm and the fixed arm release the conductor. A grounding short-circuit device for restricting rotation of the movable arm in the opening direction.   The lock portion is provided with a ratchet gear, a latching claw urged toward the ratchet gear, and the latching claw, and is a lock for releasing the latching between the ratchet gear and the latching claw. The ground short-circuit instrument according to claim 1, further comprising a release unit. The ratchet gear is provided with a support portion formed integrally with the ratchet gear,
The grounding short-circuit apparatus according to claim 2, wherein the support portion is provided with a predetermined hook portion.   The grounding according to any one of claims 1 to 3, wherein the electric path side connector is provided with a fitting insertion portion into which a predetermined rod member can be fitted at an end opposite to the side on which the fixed arm is formed. Short circuit device. The cable is provided with a connecting portion capable of connecting a plurality of electric circuit side connectors,
Each cable in the said connection part is a grounding short circuit instrument in any one of Claim 1 to 4 formed so that removal is possible.

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