Grounding jig

Abstract

A grounding jig that does not require skilled techniques and can be easily attached and detached. [Solution] The device comprises a metal gripping part 10 having a pair of opposing gripping pieces 11 and 12, which grips the grounded part 2 between the pair of gripping pieces 11 and 12 to make an electrical connection, a support part 40 that supports the pair of gripping pieces 11 and 12 in a state biased in the gripping direction E, a mounting part 50 to which the upper end 3a of the insulating operating rod 3 is attached and which is provided with the support part 40, and a grounding wire 60 that is directly or indirectly connected to the gripping part 10. The gripping part 10 is detachably attached to the grounded part 2 by pushing it up from below, and an engagement hole 13 for engaging the grounded part 2 is formed on the gripping surface where the pair of gripping pieces 11 and 12 face each other.

Description

Technical Field

[0001] The present invention relates to a grounding jig.

Background Art

[0002] Conventionally, when working on an electric circuit provided at a high place in power transmission equipment or the like, in order to ensure the safety of workers, a working ground is attached to the electric circuit (see, for example, Patent Document 1). In this case, from the viewpoint of safety, a grounding fitting of a mechanism attached by performing operations such as pushing, rotating, and pulling down is used so that the working ground does not easily come off.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, the electric circuit is usually at a height of about 3 to 6 m from the viewpoint of electrical insulation. In order to attach the grounding fitting, an insulating rod is used, and operations such as pushing, rotating, and pulling down as described above are performed while understanding the structure of the grounding fitting, and it is necessary to attach and detach. Therefore, it is a laborious task for a worker with skilled techniques, and there is room for improvement in this regard.

[0005] An object of the present invention is to provide a grounding jig that does not require skilled techniques and can be easily attached and detached.

Means for Solving the Problems

[0006] (1) Embodiment 1 of the grounding jig according to the present invention is a grounding jig for providing working grounding to a protruding grounded portion of an electrical circuit installed at a high place using a long insulating operating rod, comprising: a metal gripping portion having a pair of gripping pieces facing each other, which grips the grounded portion between the pair of gripping pieces to electrically connect; a support portion that supports the pair of gripping pieces in a state biased in the gripping direction; a mounting portion to which the upper end of the insulating operating rod is attached and which is provided with the support portion; and a grounding wire directly or indirectly connected to the gripping portion, wherein the gripping portion is detachably provided by pushing it up from below relative to the grounded portion, and engagement holes for engaging the grounded portion are formed on the gripping surfaces where the pair of gripping pieces face each other.

[0007] According to the present invention, the grounding jig can be attached to and detached from a grounded part by a simple operation of operating an insulating operating rod attached to the mounting part of the grounding jig, pushing the gripping part upward and pressing the gripping part against the part to be grounded. When attaching the grounding jig to a grounded part, the part to be grounded can be engaged with the engagement holes formed in the pair of gripping pieces by pressing the gripping part against the part to be grounded. At this time, the part to be grounded that is engaged with the engagement holes is biased in the gripping direction by the pair of gripping pieces and is held in place, so the grounding jig can be attached to the grounded part while preventing it from coming off. Furthermore, when removing the grounding jig from a grounded part, the part to be grounded that is engaged with the engagement holes can be moved downward against the biasing force of the pair of gripping pieces by pushing the gripping part against the part to be grounded, just as when attaching it, so that the part to be grounded that is engaged with the engagement holes is moved downward against the biasing force of the pair of gripping pieces, and the part to be grounded can be moved to a position where it is not engaged with the engagement holes formed in the pair of gripping pieces, and the grounding jig can be removed from the grounded part. Thus, with the grounding jig according to the present invention, attachment and detachment to the grounded part can be performed easily and efficiently simply by pushing the gripping part upward, thus eliminating the need for skilled techniques.

[0008] (2) A second aspect of the present invention is a grounding jig according to aspect 1, wherein the gripping portion preferably has an insertion opening for inserting the portion to be grounded into the gripping region between the pair of gripping pieces from below, and an outlet for removing the portion to be grounded from the gripping region downward.

[0009] According to the present invention, the part to be grounded can be inserted through the upper insertion opening of the gripping area provided in the gripping part, and the part to be grounded can be removed from the lower outlet of the gripping area. Therefore, when attaching and detaching the grounding jig to the part to be grounded, the work can be reliably performed by only an upward pushing motion.

[0010] (3) A third aspect of the present invention is a grounding jig according to the second aspect, characterized in that the gripping portion is provided with a guide that guides the portion to be grounded into the insertion opening.

[0011] In this case, when attaching the grounding jig to the part to be grounded, the part to be grounded can be pressed against the guide from below, allowing the guide to guide the part to be grounded into the insertion opening, and the part to be grounded can be reliably and efficiently inserted into the gripping area and gripped by the gripping part.

[0012] (4) Aspect 4 of the present invention may be characterized in that, in any one of the grounding fixtures from Aspects 1 to 3, the engagement holes are provided in multiple locations in the vertical direction.

[0013] In this case, since multiple engagement holes are provided in the same vertical direction as the direction in which the grounding jig is pushed up, even if the gripping part is pushed in too far and passes the uppermost engagement hole, it can be engaged with another engagement hole below it. Therefore, when gripping the part to be grounded with the gripping part, it is possible to prevent the part to be grounded from coming out of the gripping area between the pair of gripping pieces, and a more reliable mounting operation can be performed.

[0014] (5) Aspect 5 of the present invention is a grounding jig in any one of aspects 1 to 4, wherein the pair of gripping pieces are each supported by a biasing member with respect to the support portion, and the biasing member biases the pair of gripping pieces toward each other.

[0015] In this case, the biasing member can take a reaction force from the support portion and bias the pair of gripping pieces in the gripping direction.

[0016] (6)Aspect 6 of the present invention may be characterized in that, in any one of the grounding fixtures according to Aspect 1 to Aspect 5, the engaging hole has a movement restricting portion that restricts upward movement of the grounded portion that engages with the engaging hole.

[0017] In this case, since the movement restricting portion is provided above the engaging hole, it is difficult to lower the grounding fixture in a state where the grounded portion is engaged with the engaging hole, and it is easy to perform an upward pushing operation. Therefore, for example, even when an action of pulling the grounding wire downward occurs, it is possible to prevent the grounding fixture from coming off the grounded portion.

[0018] (7)Aspect 7 of the present invention may be characterized in that, in any one of the grounding fixtures according to Aspect 1 to Aspect 6, the mounting portion has a detachable insertion opening by inserting the insulating operating rod from below.

[0019] In this case, the upper end of the insulating operating rod can be inserted into and withdrawn from the insertion opening of the mounting portion to perform the attachment and detachment operation. Therefore, it is possible to easily perform the operation of attaching and detaching the grounding fixture to and from the grounded portion at a height where the hand cannot reach from the ground portion.

Advantages of the Invention

[0020] According to the grounding fixture according to the present invention, no skilled technique is required, and the attachment and detachment operation can be easily performed.

Brief Description of the Drawings

[0021] [Figure 1] It is a perspective view showing a state where the grounding fixture according to an embodiment of the present invention is attached to a grounded portion. [Figure 2] It is a perspective view of the grounding fixture attached to the insulating operating rod. [Figure 3] It is a side view of the grounding fixture shown in FIG. 2, showing a state before attaching the insulating operating rod. [Figure 4] It is an enlarged view of the gripping portion shown in FIG. 3. [Figure 5](a) to (c) are diagrams showing the working steps of attaching the grounding jig to the grounded part. [Figure 6] (a) to (c) are diagrams showing the working steps of removing the grounding jig from the grounded part.

Embodiments for Carrying out the Invention

[0022] Hereinafter, the grounding jig according to the embodiment of the present invention will be described with reference to the drawings.

[0023] The grounding jig 1 of the embodiment shown in FIG. 1 is for a worker M to use a long insulating operation rod 3 to provide working grounding for a protruding grounded part 2 of an electric circuit 20 provided at a high place. In this embodiment, as shown in FIG. 1, the work of a worker M holding the insulating operation rod 3 by hand and attaching the grounding jig 1 to the grounded part 2 is described as an example, but the work may be performed using a machine instead of a person.

[0024] Here, in the grounding jig 1, with the posture of being attached to the grounded part 2, the central axis O direction of the insulating operation rod 3 (see FIG. 3) is taken as the vertical direction X1, and the gripping direction perpendicular to the vertical direction X1 is taken as the left-right direction X2 for the following description.

[0025] The grounded part 2 is provided on a part of the electric circuit 20 and is a metal rod-shaped member. The grounded part 2 has a long rod-shaped protrusion 21 and a large-diameter part 22 with a diameter larger than the outer diameter D of the protrusion 21 at the protruding tip of the protrusion 21.

[0026] The insulating operation rod 3 is provided to mount the grounding jig 1 at the upper end 3a and perform an operation of moving the grounding jig 1 in the vertical direction X1. The insulating operation rod 3 is a member having an insulating circular cross-section. The insulating operation rod 3 may be a solid, hollow, or cylindrical member. The upper end 3a of the insulating operation rod 3 has pin-shaped locking convex portions 31 protruding outward on both sides in a direction perpendicular to the central axis O. The locking convex portions 31 are inserted into the notch grooves 52 of the mounting portion 50 described later.

[0027] As shown in Figures 1 to 3, the grounding jig 1 comprises a gripping part 10, a support part 40, a mounting part 50, and a grounding wire 60.

[0028] The gripping portion 10 is detachably attached to the grounded portion 2 by pushing it up from below. The gripping portion 10 has a pair of gripping pieces 11 and 12 that face each other. The pair of gripping pieces 11 and 12 clamp the projection 21 of the grounded portion 2 and make an electrical connection. The gripping portion 10 is made of a metal component.

[0029] The pair of gripping pieces 11 and 12 are rectangular in shape, extending in the vertical direction X1 when viewed from the side. The pair of gripping pieces 11 and 12 are supported by the support portion 40 at a constant distance d (distance of the gripping area R1) while biased in the gripping direction E (the direction in which the pair of gripping pieces 11 and 12 are close to each other) and facing each other in the left-right direction X2. The distance d between the gripping pieces 11 and 12 in the left-right direction X2 is set to be smaller than the outer diameter of the projection 21 of the contacted portion 2. The pair of gripping pieces 11 and 12 are movable in the left-right direction X2, and the distance d between the pair of gripping pieces 11 and 12 can be changed. When the pair of gripping pieces 11 and 12 move in the direction away from each other, the distance d becomes larger than at least the outer diameter D of the projection 21 of the contacted portion 2.

[0030] The gripping portion 10 has an insertion opening 14 for inserting the projection 21 of the contact portion 2 into the gripping region R1 between the pair of gripping pieces 11 and 12 from below, and an outlet 15 for removing the projection 21 from the gripping region R1 downwards.

[0031] Multiple engagement holes 13 (13A, 13B, 13C) are provided in the vertical direction X1 on the gripping surfaces 11a, 12a where the pair of gripping pieces 11, 12 face each other. In this embodiment, there are three engagement holes 13 (13A, 13B, 13C) for engaging with the projection 21 of the contact portion 2. The engagement holes 13 are arranged from top to bottom as follows: upper engagement hole 13A, middle engagement hole 13B, and lower engagement hole 13C.

[0032] As shown in Figure 4, the engagement holes 13A, 13B, and 13C are configured with a pair of left and right gripping pieces 11 and 12 in a biased state, and are approximately circular in shape, roughly the same as the outer shape of the projection 21 of the contacted portion 2. Each engagement hole 13 forms a curved tapered surface 13a at the lower part of the hole of each gripping piece 11 and 12. The lower opening 13b formed by the tapered surface 13a of the engagement hole 13 is shaped to be more open in the left-right direction X2 than the upper opening 13c. In other words, the engagement hole 13 has a movement-restricting portion 13d that suppresses the upward movement of the projection 21 of the contacted portion 2 that engages with the engagement hole 13. As a result, the part to be grounded 2, which engages with the engagement hole 13, can easily move through the lower opening 13b by pushing the grounding jig 1 upward, and even if the grounding jig 1 is pulled downward, it interferes with the movement-restricting part 13d, restricting its movement and making it difficult to pass through the upper opening 13c.

[0033] A pair of gripping pieces 11 and 12 are each supported by a support portion 40 on their outer sides in the left-right direction X2 via a spring member 16 (biasing member). A coil spring is used for the spring member 16. The spring member 16 biases the pair of gripping pieces 11 and 12 toward each other. The spring member 16 is provided on the upper and lower sides of each gripping piece 11 and 12 in the vertical direction X1.

[0034] The gripping portion 10 is provided with a guide 17 that guides the projection 21 of the grounding portion 2 into the insertion opening 14. The guide 17 has a shape that extends outward in the left-right direction X2 as it goes upward from each of the pair of gripping pieces 11 and 12. By bringing the projection 21 into contact with the inner guide surface 17a of the guide 17 and pushing the grounding jig 1 upward, the projection 21 is guided along the guide surface 17a into the insertion opening 14, and the projection 21 can be inserted into the gripping area R.

[0035] As shown in Figures 2 to 4, the support portion 40 has a pair of support pieces 41 and 42 that fix each of the pair of gripping pieces 11 and 12. The support pieces 41 and 42 are metal strip-shaped plate members. The lower part of the support pieces 41 and 42 is fixed to the circumferential surface of the mounting portion 50 by bolts 43, and the upper part supports the outer surfaces of the gripping pieces 11 and 12 via spring members 16 by bolts 44. The support portion 40 supports the pair of gripping pieces 11 and 12 in a state biased in the gripping direction E.

[0036] Between the gripping portion 10 and the mounting portion 50 in the vertical direction X1, there is an extraction region R2 between the pair of support pieces 41 and 42 where the portion to be grounded 2, which has been pulled out downward from the outlet 15, is temporarily placed. The extraction region R2 is in communication with the gripping region R1.

[0037] The mounting portion 50 is provided by attaching the upper end 3a of the insulated operating rod 3 and fixing the support portion 40 to it. The mounting portion 50 is cylindrical in shape. The lower part of the mounting portion 50 has an insertion opening 51 into which the insulated operating rod 3 can be inserted and removed from below. The insertion opening 51 has a pair of slit-shaped notches 52 cut out from the lower end upwards and are provided at opposing positions. The locking projections 31 of the insulated operating rod 3 are inserted into the pair of notches 52. The width of the notches 52 is approximately the same as the outer diameter of the locking projections 31. When the locking projections 31 are inserted into the notches 52 and locked, the rotation of the insulated operating rod 3 about the central axis O attached to the mounting portion 50 is restricted.

[0038] The grounding wire 60 is indirectly connected to the metal gripping portion 10 via the metal support portion 40. The gripping pieces 11 and 12, the support pieces 41 and 42, and the grounding wire 60 are electrically conductive. In other words, the grounding wire 60 is electrically conductive to the grounded portion 2 gripped by the gripping portion 10. The grounding wire 60 is connected to the earth ground as shown in Figure 1.

[0039] Next, the procedure for performing grounding work using the grounding jig 1 described above, and the operation of the grounding jig 1, will be explained using Figures 5 and 6. First, when attaching the grounding jig 1 to the part to be grounded 2, the grounding jig 1 is attached to the upper end 3a of the insulating operating rod 3, as shown in Figure 5(a). Specifically, the upper end 3a of the insulating operating rod 3 is inserted into the insertion opening 51 of the mounting part 50, and the locking projection 31 of the insulating operating rod 3 is inserted into the notched groove 52 of the mounting part 50 to set both together. This restricts the relative rotation between the grounding jig 1 and the insulating operating rod 3.

[0040] Then, worker M holds the lower part of the insulating operating rod 3 and pushes the grounding jig 1 upward, moving the gripping part 10 toward the projection 21 of the part to be grounded. At this time, by pushing the insulating operating rod 3 upward, the grounding jig 1 is pushed up from below by the insulating operating rod 3, so the grounding jig 1 does not detach from the insulating operating rod 3.

[0041] As shown in Figure 5(b), when the projection 21 of the part to be grounded 2 comes into contact with the guide 17 of the gripping part 10, the projection 21 moves along the guide surface 17a of the guide 17 and is guided into the insertion opening 14 of the gripping part 10. Further pushing the gripping part 10 upward against the projection 21 of the part to be grounded 2 causes the pair of gripping pieces 11 and 12 to move in a direction away from each other against the biasing force of the spring member 16, widening the gap d (see Figure 4) of the gripping region R1, and the projection 21 is inserted into the gripping region R1. Further pushing the gripping part 10 upward causes the projection 21 to engage with the engagement hole 13 (in this case, the intermediate engagement hole 13B), as shown in Figure 5(c), and the engaged part to be grounded 2 is held in a gripped state in the left-right direction X2 by the biasing force of the pair of gripping pieces 11 and 12.

[0042] As shown in Figure 1, the lower end of the grounding wire 60 is connected to the ground. This grounds the grounding jig 1 to the part to be grounded 2, completing the installation process. Subsequently, the insulating operating rod 3 is pulled downwards to detach it from the mounting part 50, leaving only the grounding jig 1 attached to the part to be grounded 2.

[0043] Next, when removing the grounding jig 1 from the part to be grounded 2, as shown in Figure 6(a), the upper end 3a of the insulating operating rod 3 is inserted into the opening 51 of the mounting part 50 of the grounding jig 1 attached to the part to be grounded 2. At this time, the locking projection 31 of the insulating operating rod 3 is inserted into the notched groove 52 of the mounting part 50 to set the two together. This restricts the relative rotation between the grounding jig 1 and the insulating operating rod 3.

[0044] Subsequently, worker M holds the lower part of the insulating operating rod 3 and pushes the grounding jig 1 upward, pushing the gripping part 10 further upward against the projection 21 of the part to be grounded 2. As a result, the pair of gripping pieces 11 and 12 move in a direction away from each other against the biasing force of the spring member 16, widening the gap d (see Figure 4) in the gripping area R1, and the projection 21 moves from the intermediate engagement hole 13B through the lower engagement hole 13C to the outlet 15. Furthermore, as shown in Figure 6(b), the part to be grounded 2 moves to the extraction area R2, detaches downward from the gripping part 10, and the gripping state by the gripping part 10 is released.

[0045] Next, as shown in Figure 6(c), the grounding jig 1 is slid in the axial direction of the part to be grounded 2, thereby extracting and removing the part to be grounded 2 from the extraction area R2. By retrieving the grounding jig 1 in this way, the process of removing the grounding jig 1 from the part to be grounded 2 is completed.

[0046] Next, the operation of the grounding jig 1 will be explained in detail based on the drawings. The grounding jig 1 according to this embodiment is a grounding jig for providing working grounding to a protruding grounded portion 2 of an electrical circuit 20 installed at a high place using a long insulating operating rod 3. The grounding jig 1 comprises a metal gripping portion 10 having a pair of gripping pieces 11 and 12 facing each other, which clamps the grounded portion 2 and electrically connects it; a support portion 40 that supports the pair of gripping pieces 11 and 12 in a state biased in the gripping direction E; a mounting portion 50 to which the upper end 3a of the insulating operating rod 3 is attached and to which the support portion 40 is provided; and a grounding wire 60 that is directly or indirectly connected to the gripping portion 10. The gripping portion 10 is detachably attached to the grounded portion 2 by pushing it up from below, and an engagement hole 13 for engaging the grounded portion 2 is formed on the gripping surface where the pair of gripping pieces 11 and 12 face each other.

[0047] According to this embodiment of the grounding jig 1, the grounding jig 1 can be attached to and detached from the part to be grounded 2 by a simple operation of operating the insulating operating rod 3 attached to the mounting part 50 of the grounding jig 1 and pushing the gripping part 10 upward and pressing the gripping part 10 against the part to be grounded 2. When attaching the grounding jig 1 to the part to be grounded 2, the part to be grounded 2 can be engaged with the engagement holes 13 formed in the pair of gripping pieces 11 and 12 by pushing the gripping part 10 against the part to be grounded 2. At this time, the part to be grounded 2 engaged with the engagement holes 13 is biased in the gripping direction E by the pair of gripping pieces 11 and 12 and is clamped, so the grounding jig 1 can be attached to the part to be grounded 2 in a state in which detachment is suppressed. Furthermore, when removing the grounding jig 1 from the grounded part 2, the gripping part 10 is pushed against the grounded part 2 in the same way as when attaching it. This causes the grounded part 2, which is engaged with the engagement hole 13, to move downward against the biasing force of the pair of gripping pieces 11 and 12, thereby moving the grounded part 2 to a position where it is disengaged from the engagement hole 13 formed in the pair of gripping pieces 11 and 12, and the grounding jig 1 can be removed from the grounded part 2. Thus, with the grounding jig according to the present invention, the attachment and detachment work to the grounded part 2 can be performed easily and efficiently simply by pushing the gripping part 10 upward, thus eliminating the need for skilled techniques.

[0048] Furthermore, in this embodiment, the gripping portion 10 has an insertion opening 14 for inserting the grounded portion 2 from below into the gripping region R1 between the pair of gripping pieces 11 and 12, and an outlet 15 for removing the grounded portion 2 from the gripping region R1 downwards. With this configuration, the part to be grounded 2 can be inserted through the upper insertion opening 14 of the gripping area R1 provided in the gripping part 10, and the part to be grounded 2 can be removed through the lower outlet 15 of the gripping area R1. Therefore, when attaching or detaching the grounding jig 1 to the part to be grounded 2, the work can be reliably performed by only an upward pushing motion.

[0049] Furthermore, in this embodiment, the gripping portion 10 is provided with a guide 17 that guides the contact portion 2 into the insertion opening 14. With this configuration, when attaching the grounding jig 1 to the part to be grounded 2, the part to be grounded 2 can be pressed against the guide 17 from below, allowing the part to be grounded 2 to be guided by the guide 17 and led to the insertion opening 14, so that the part to be grounded 2 can be reliably and efficiently inserted into the gripping area R1 and gripped by the gripping part 10.

[0050] Furthermore, in this embodiment, the engagement holes 13 may be characterized by being provided in multiple locations in the vertical direction X1. With this configuration, since multiple engagement holes 13 are provided in the same vertical direction X1 as the direction in which the grounding jig 1 is pushed up, even if the gripping part 10 is pushed in too far and passes the uppermost engagement hole 13 (upper engagement hole 113A), it can still engage with another engagement hole 13 below it (intermediate engagement hole 13B or lower engagement hole 13C). Therefore, when gripping the part to be grounded 2 with the gripping part 10, it is possible to prevent the part to be grounded 2 from coming off downward from the gripping area R1 between the pair of gripping pieces 11 and 12, enabling more reliable mounting work.

[0051] In this embodiment, the pair of gripping pieces 11 and 12 are each supported by the support portion 40 via a spring member 16. The spring member 16 biases the pair of gripping pieces 11 and 12 toward each other. With this configuration, the spring member 16 can take a reaction force from the support portion 40 and bias the pair of gripping pieces 11 and 12 in the gripping direction E.

[0052] Furthermore, in this embodiment, the engagement hole 13 has a movement-restricting portion 13d that suppresses upward movement of the grounded portion 2 that engages with the engagement hole 13. With this configuration, since the movement-restricting part 13d is provided above the engagement hole 13, it is difficult to pull down the grounding jig 1 when the grounded part 2 is engaged with the engagement hole 13, and it is easier to push it upward. Therefore, even if, for example, a downward pulling force occurs on the grounding wire 60, it is possible to prevent the grounding jig 1 from coming off the grounded part 2.

[0053] Furthermore, in this embodiment, the mounting portion 50 has a detachable insertion opening into which the insulating operating rod 3 is inserted from below. With this configuration, attachment and detachment can be performed simply by inserting the upper end 3a of the insulating operating rod 3 into the insertion opening 51 of the mounting part 50 and then removing it. Therefore, the work of attaching and detaching the grounding jig 1 to the grounded part 2 at a high place that is out of reach can be easily performed from the ground.

[0054] While several embodiments of the present invention have been described, these embodiments are presented as examples only and are not intended to limit the scope of the invention. These embodiments can be carried out in a variety of other forms, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention. These embodiments and their variations are included in the scope and spirit of the invention, as well as in the claims and their equivalents.

[0055] For example, in this embodiment, the gripping portion 10 is configured to have multiple (3) engagement holes 13, but the number of engagement holes 13 is not limited to 3; it may be 1, 2, or 4 or more.

[0056] Furthermore, the shape, size, and other configurations of the gripping portion 10 (engagement hole 13, guide 17), support portion 40, and mounting portion 50 are not limited to the embodiments described above and can be set as appropriate. [Explanation of symbols]

[0057] 1 Grounding jig, 2 Grounded part, 3 Insulated operating rod, 10 Gripping part, 11, 12 Gripping piece, 13, 13A, 13B, 13C Engagement hole, 13d Movement suppressing part, 14 Insertion port, 15 Output port, 16 Spring member (biasing member), 17 Guide guide, 20 Electrical circuit, 21 Projection, 31 Locking protrusion, 40 Support part, 50 Mounting part, 51 Socket, 52 Notch groove, 60 Ground wire, E Gripping direction, R1 Gripping area, R2 Removal area, X1 Vertical direction, X2 Horizontal direction

Claims

1. A grounding jig for providing working grounding to a protruding grounded portion of an electrical circuit installed at a high place using a long insulating operating rod, A metal gripping part having a pair of gripping pieces facing each other, which clamps the grounded portion between the pair of gripping pieces to electrically connect it, A support portion that supports the pair of gripping pieces in a state biased in the gripping direction, The mounting portion, which has the upper end of the insulating operating rod attached and the support portion provided, The gripping portion is connected directly or indirectly to a grounding wire, The gripping portion is detachably attached to the grounded portion by pushing it upward from below. A grounding jig in which engagement holes are formed in the gripping surfaces where the pair of gripping pieces face each other, for engaging the portion to be grounded.

2. The grounding jig according to claim 1, wherein the gripping portion has an insertion opening for inserting the grounded portion into the gripping region between the pair of gripping pieces from below, and an outlet for removing the grounded portion from the gripping region downward.

3. The grounding jig according to claim 2, wherein the gripping portion is provided with a guide that guides the portion to be grounded into the insertion opening.

4. The grounding jig according to claim 1 or 2, wherein the engagement holes are provided in multiple locations in the vertical direction.

5. Each of the pair of gripping pieces is supported by the support portion via a biasing member, The grounding jig according to claim 1 or 2, wherein the biasing member biases the pair of gripping pieces toward each other.

6. The grounding jig according to claim 1 or 2, wherein the engagement hole has a movement restraining part that restrains the upward movement of the grounded part that engages with the engagement hole.

7. The grounding jig according to claim 1 or 2, wherein the mounting portion has a detachable insertion opening into which the insulating operating rod is inserted from below.

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