JP4546949B2 - Insulator attachment method, insulator removal method and split pin attachment used therefor - Google Patents

Description

The present invention also relates again and again mounting the split pin to be inserted into Kottapi emissions used in the insulator mounting method and detaching method and a method thereof in a power distribution work by indirect active line using a hot stick.

In order to fasten the tension insulators to the strap or to connect the tension insulators to each other in the extension work of the high-voltage electric wire, etc., the cotter pin and the split pin are generally used. First, the insulator and the strap or two insulators are connected. Insert the cotter pin into the hole, and then insert the split pin into the insertion hole of the cotter pin. Conventionally, a series of works including this work have been carried out with a blackout of the construction site. However, this method has been a problem because the surrounding area suffered a power failure, and in recent years, devices such as servers that require constant power supply have become widespread. In addition, there is a direct live line method in which the worker wears protective equipment and directly touches the high-voltage power line while working while the power is on. There was a problem that I could not work. Therefore, in recent years, an indirect hot wire method has been performed as a method that can ensure the safety of workers while being energized. This is achieved by using a long insulating work bar called a hot stick (such as a barbed insulation gripping bar or a common insulating bar with various tools attached to the tip), and close to the live line without touching the high-voltage wire directly. Since the work is performed from outside the range, there is less danger to the worker, and only a power failure at the supply destination directly connected to the work pole is required. However, it is a general insulating gripping rod, and a conventional cotter pin having a body portion 2 and a flange portion 4 as shown in FIG. 10 ((a) is a front view and (b) is a side view), and a small split pin. It was difficult to carry out the fine work of gripping and inserting the. Therefore, in Literature 1, a hot wire construction tool for a cotter pin and a split pin to be attached to the tip of an insulating common bar is proposed. This is a tool that is detachably attached to the tip of the shared insulating rod, and has a cotter pin attaching / detaching portion, a split pin attaching portion, and a split pin removing portion.
JP 11-98631 A

  However, since the present invention is a tool specially for handling cotter pins and cotter pins, it is necessary to prepare an insulating common bar equipped with this, or to replace it with an insulating common bar to which another tool is attached. However, it is not desirable to increase the number of tools and processes used in field work. Further, when removing the cotter pin, the flange portion of the cotter pin is in close contact with the insulator and is difficult to insert into the cotter pin insertion groove, and there is nothing to grip the cotter pin during this time, so there is a risk of dropping.

The present invention has been made in view of these circumstances, and an object thereof is to provide a split pin fitting to use easy and safe insulators Mounting and insulator detaching method and method thereof according to the insulating grip bar.

The invention of claim 1 of the present invention is that a lever provided with a connecting hole is made up of a cotter pin, a head portion and a leg portion having spring force by using two insulating gripping bars , a lever pinching tool and a fixture. The insulator mounting rod has a gripping portion at the tip, and the mounting tool is made of rubber and is gripped by the gripping portion of the insulating gripping rod. A flat base portion, a tip portion extending from the base portion, and a holding hole having an elliptical cross section that is perforated in the tip portion and holds the split pin. The holding hole has a split pin shape in cross section. The cotter pin has a cylindrical body part, an insertion hole that penetrates perpendicularly to the central axis of the body part, and inserts a split pin. A hook that is formed at one end and engages with the peripheral edge of the connecting hole of the lever, and an insulating grip that extends from the hook Gripping a flat gripping portion for gripping by the portion of the tip portion of the comb-like structures which are formed at the other end of the barrel, which comprises, holding the insulator to the mounting position insulators scissors tool, While holding the cotter pin with the gripping part of one insulating gripping rod and inserting the cotter pin into the connecting hole of the insulator, with the cotter pin insertion hole facing the insertion direction of the split pin, The cotter pin that was inserted and held in the holding hole of the fixture was inserted into the insertion hole against the spring force of the leg by gripping the base of the fixture with the grip portion of the other insulating gripping rod. Thereafter, only the fixture is pulled out while leaving the split pin in the insertion hole.

The invention of claim 2 is the co Ttapin, a split pin and a leg portion carrying the head and the spring force, the insulator mounted is inserted, and two insulating grip bars, insulators scissors tool and An insulator removal method for removing with a removal tool , wherein the insulating gripping rod has a grip at the tip, and the cotter pin is penetrated perpendicularly to the cylindrical barrel and the central axis of the barrel, and is split. An insertion hole for inserting a pin, a hook part formed at one end of the body part to be engaged with a peripheral part of the connecting hole of the lever, and a grip part of an insulating gripping rod extending to the hook part. And a pointed tip formed at the other end of the body, and the removal tool is provided with a hook-shaped hook, and is insulated on one side. While holding the cotter pin gripping part with the gripping part of the gripping bar, grip the removal tool with the gripping part of the other insulating gripping bar. , Hook the hook on the split pin head, operate the insulation gripping rod to pull out the leg of the split pin from the insertion hole against the spring force, and hold the lever with the lever pinching tool. The insulating gripping rod is operated to pull out the cotter pin.

Further, the invention of claim 3 is made of rubber and is a flat base for gripping by the gripping portion of the insulating gripping rod, a tip extending from the base, and a hole drilled in the tip for cutting. A holding hole having an oval cross section for holding the pin, and the holding hole is formed to have a cross sectional shape smaller than the head of the split pin. Furthermore, as in the invention of claim 4 , an auxiliary hole that is orthogonal to and communicates with the holding hole may be provided.

Moreover, it is desirable that the above-mentioned removal tool be provided with a hook-like hooking part for bending the wire and hooking the head of the split pin.

  According to the invention of the first aspect of the present invention, the insulator can be easily attached with a small number of steps by using the insulating gripping rod. In particular, the cotter pin can be directly gripped by the insulating gripping rod, and the split pin can be attached only by the linear motion of the insulating gripping rod via the split pin mounting tool. Furthermore, the part that may be dropped is always gripped, and safety is high.

  According to the invention of claim 2 of the present invention, the insulator can be easily removed with a small number of steps by using the insulating gripping rod. In addition, the part that may drop off is always held and is highly safe.

Further, if the cotter pin has the above shape, the cotter pin can be easily and reliably gripped by the insulating gripping rod by providing a flat grip portion. Moreover, since the tip portion is pointed, it can be easily inserted into the connecting hole of the insulator. Further, since the cotter pin can be continuously held even when it is inserted into the insulator, there is no risk of the cotter pin falling off.

According to the third aspect of the present invention, the small split pin can be easily and reliably gripped by the insulating gripping rod. Moreover, since the split pin is inserted into the insertion hole of the lever in the gripped state and the fixture is detached from the split pin simply by pulling the fixture as it is, it can be easily attached only by the linear operation of the insulating grip rod.

According to the invention of claim 4 of the present invention, the split pin head is fitted into the auxiliary hole so as to hold the split pin more securely, and even when the angle of the split pin relative to the fixture is changed. It can be held stably.

Further, if the removal tool has the above shape , the split pin can be easily pulled out by simply hooking and pulling the hook-shaped hook portion on the head of the split pin.

Specific configurations of the cotter pin, attachment tool, and removal tool used in the method of the present invention will be described with reference to the drawings.

FIG. 1 shows a cotter pin 1 used in the method of the present invention, where (a) is a front view and (b) is a side view. The cotter pin 1 is made of a general structural rolled steel material, includes a cylindrical body portion 2, and has an insertion hole 3 penetrating perpendicularly to the central axis thereof. A flange 4 having a diameter larger than that of the body 2 is formed at one end of the body 2, and a flat plate-shaped grip 5 is extended to the flange 4. Further, a pointed tip portion 6 is formed at the other end of the body portion 2. The grip portion 5 may have any shape, but if it is too small, it is difficult to grip, and if it is too large, it may interfere with the surroundings when attached, so it is the same as the diameter of the body portion 2 or about twice the diameter. It is preferable that it is the magnitude | size of. Further, it is preferable that a counterbore portion 7 is formed in the insertion hole 3 by a counterboring process so that the split pin can be easily inserted.

  FIG. 2 is a front view of the split pin 10. The split pin 10 is made of a stainless steel wire having a semicircular cross section, and includes an annular head portion 11 and a bifurcated leg portion 12 having a spring force. Is formed. Although the width of the convex portion 13 is larger than the diameter of the insertion hole 3 of the cotter pin 1, it can be inserted by being elastically deformed and the width is narrowed. It is locked to the peripheral edge of the insertion hole 3 to prevent dropping.

  3A and 3B show the fixture 20, wherein FIG. 3A is a plan view, FIG. 3B is a front view, and FIG. 3C is a side view. The fixture 20 is made of chloroprene rubber, and a rectangular parallelepiped tip 24 is extended to one end of a flat base 21. Further, a holding hole 22 is drilled on the opposite side of the surface of the tip 24 that contacts the base 21. The holding hole 22 has an oval cross section, and its long diameter is slightly shorter than the outer diameter of the head 11 of the split pin 10. In the present embodiment, the outer diameter of the head 11 is 10 mm, while the long diameter of the holding hole 22 is 8 mm. On the other hand, the short diameter of the holding hole 22 is the same as the thickness of the split pin 10. The depth of the holding hole 22 is such a depth that the head 11 of the split pin 10 can be accommodated, and is 11 mm in this embodiment. Further, an auxiliary hole 23 is formed through a surface orthogonal to the surface where the holding hole 22 is drilled. The cross-sectional shape of the auxiliary hole 23 is the same as that of the holding hole 22, and the holding hole 22 and the auxiliary hole 23 communicate with each other.

  FIG. 3D is an explanatory view showing a state in which the split pin 10 is inserted into the holding hole 22 of the fixture 20. Although the holding hole 22 is smaller than the head 11 of the split pin 10, the fixture 20 is made of rubber and can be inserted because it is elastically deformed. And if the split pin 10 is inserted to the back of the holding hole 22, the head 11 will fit in the auxiliary hole 23, and the fixture 20 will return to a state without a deformation | transformation. In this state, since the entrance of the holding hole 22 is narrower than the head 11 of the split pin 10, the split pin 10 will not come off. Furthermore, as shown in FIG. 3E, the orientation of the split pin 10 with respect to the fixture 20 can be changed with the head 11 as the central axis.

  FIG. 4A is a front view of the removal tool 30. The removal tool 30 is made of a stainless steel wire having a circular cross section, and is formed at a linear intermediate part 31, a hook-like hook part 32 formed at one end of the intermediate part 31, and the other end of the intermediate part 31. And an end portion 33. The hook portion 32 includes a semicircular arc receiving portion 34 and a quarter arc-shaped return portion 35. Moreover, although the termination | terminus part 33 may be what kind of shape, it is preferable to make it easy to hold | grip as planar shapes, such as an ellipse shape. Furthermore, as shown in FIG.4 (b), you may make it easier to hold | grip by penetrating the intermediate part 31 to the flat-shaped holding | grip auxiliary tool 36 which consists of resin or a plastics.

  Next, the procedure of the insulator mounting method using the cotter pin and the mounting tool will be described. Here, it is assumed that two workers (worker A and worker B) get on the bucket of an aerial work vehicle and attach the insulator 40 to the strap 60 at the upper part of the utility pole (FIG. 5).

  First, the operator B holds the lever 40 with the lever pinching tool 52 and holds the connecting hole 41 of the lever 40 and the strap hole 61 of the strap 60 in a aligned state. Further, the worker A holds the cotter pin 1 with the holding part 51a of the insulating holding bar 50a. Since the cotter pin 1 has the flat-plate-shaped holding part 5, it can be easily held (FIG. 6).

Next, the worker A inserts the cotter pin 1 into the connecting hole 41 of the lever 40. The cotter pin 1 used in the method of the present invention can be easily inserted because the tip 6 has a pointed shape. At this time, the orientation is adjusted so that the counterbore portion 7 of the cotter pin 1 is on the operator side. If the cotter pin 1 is inserted into the connecting hole 41, the lever 40 does not fall off, so the operator B releases the lever 40 from the lever pinching tool 52. However, since the cotter pin 1 can be pulled out in a free state, the worker A continues to grip the cotter pin 1 with the insulating gripping rod 50a. Since the conventional cotter pin does not have a grip portion, it cannot be gripped when inserted into the connecting hole 41. However, since the cotter pin 1 used in the method of the present invention has a flat grip portion 5, the insulating grip It can be easily gripped by the rod 50a. Furthermore, the worker B inserts the split pin 10 into the holding hole 22 drilled in the front portion 24 of the fixture 20. This may be inserted in advance. Then, the worker B grips the base portion 21 of the fixture 20 with the grip portion 51b of the insulating gripping rod 50b (FIG. 7).

  Next, the operator B operates the insulating gripping rod 50 b to insert the split pin 10 into the insertion hole 3 of the cotter pin 1. At this time, the angle of the split pin 10 with respect to the fixture 20 may be adjusted so as to facilitate insertion depending on the positions of the worker B and the lever 40. When the split pin 10 is inserted into the insertion hole 3, the operator B operates the insulating gripping rod 50b to pull the fixture 20. Then, the split pin 10 is pulled together with the fixture 20, but the projection 13 of the split pin 10 is locked to the peripheral edge of the insertion hole 3, and the split pin 10 remains in the insertion hole 3. Only come off. This is because the split pin 10 has a convex portion 13 and has a shape that is difficult to be removed from the insertion hole 3, and the elastic modulus of the fixture 20 made of chloroprene rubber is smaller than that of the split pin 10 made of stainless steel wire. This is because it is easy to deform and the force required to pull out the fixture 20 from the split pin 10 is smaller than the force required to pull out the split pin 10 from the insertion hole 3. Then, after confirming that the split pin 10 is securely inserted into the insertion hole 3, the worker A releases the insulating gripping rod 50a from the cotter pin 1 to complete the work (FIG. 8).

  Next, the procedure of the insulator attachment method using the cotter pin and the removal tool will be described.

  First, the worker A grips the cotter pin 1 with the gripping portion 51a of the insulating gripping rod 50a. In this state, the worker B grips the gripping assisting tool 36 of the removal tool 30 with the gripping portion 51b of the insulating gripping rod 50b. Then, the hooking portion 32 of the removal tool 30 is hooked on the head 11 of the split pin 10, and the split pin 10 is pulled out (FIG. 9). At this time, if the removal tool 30 is gripped so that the receiving portion 34 is on the lower side, the pulled-out split pin 10 hangs on the receiving portion 34. Even when the split pin 10 is pulled out vigorously, the split pin 10 does not fall off because the return portion 35 is provided above the receiving portion 34. Further, when the split pin 10 is pulled out, the cotter pin 1 is also pulled out. However, in this method, since the cotter pin 1 is gripped in advance, it does not fall off. Next, the worker B grips the lever 40 with the lever pinching tool 52, and in this state, the worker A pulls out the cotter pin 1. As a result, the connection state between the lever 40 and the strap 60 is released, so that the worker B removes the lever 40 and the operation is completed.

Insulators Mounting and insulator detaching method and preparative with tool that used therefor of the present invention is not limited to the above embodiments. The procedure of the lever attachment method and the removal method may be changed as appropriate, and some of the steps may be omitted or another operation may be added. Moreover, although the said Example shows the case where a lever is attached to a strap, the case where a lever is connected also is the same. Furthermore, the cotter pin, the attachment tool, and the removal tool may be made of different materials or different shapes as long as the same effects can be obtained.

The front view and side view which show the cotter pin used for the method of this invention. The front view which shows a split pin. The top view which shows a fixture, a front view, a side view, and explanatory drawing which shows a split pin insertion state. The front view which shows a removal tool, and the perspective view which shows another Example. Explanatory drawing which shows the insulator attachment method (installation of an insulator). Explanatory drawing which shows a lever attachment method (insertion of a cotter pin). Explanatory drawing which shows a lever attachment method (insertion of a split pin). Explanatory drawing which shows a lever attachment method (drawing of a fixture). Explanatory drawing which shows the insulator removal method. The front view and side view which show the conventional cotter pin.

Reference Signs List 1 cotter pin 2 trunk 3 insertion hole 4 collar 5 gripping part 6 tip 10 split pin 11 head 12 leg 20 attachment 21 base 22 holding hole 23 auxiliary hole 24 tip 30 removal tool 32 catching part 40 lever 41 Connecting hole 50a, 50b Insulating gripping rod 51a, 51b Grasp part 52 Pinch tool

Claims (4)

The insulator (40) having the connecting hole (41) is connected to the cotter pin (1) and the head ( 2) using the two insulating gripping rods (50a, 50b) , the insulator clamping tool (52) and the fixture (20). 11) and a split pin (10) provided with a leg (12) having spring force ,
Insulating grip bars (50a, 50b) have grips (51a, 51b) at their tips,
The fixture (20) is made of rubber and has a flat base (21) for gripping by the grip (51b) of the insulating gripping bar (50b), and a tip extending from the base (21). And a holding hole (22) having an oval cross section that is perforated in the tip (24) and holds the split pin (10). The holding hole (22) has a split pin in cross section. It is formed smaller than the head (11) of (10),
The cotter pin (1) includes a cylindrical body portion (2), an insertion hole (3) that penetrates perpendicularly to the central axis of the body portion (2) and inserts the split pin (10), and the body A hook part (4) formed at one end of the hook part (2) and engaged with the peripheral edge of the connecting hole (41) of the lever (40), and an insulating grip rod (50a) extending to the hook part (4) A plate-shaped gripping part (5) for gripping by the gripping part (51a), and a pointed tip part (6) formed at the other end of the body part (2),
The lever (40) is held at the mounting position by the lever pinching tool (52), and the holding portion (5) of the cotter pin (1) is held by the holding portion (51a) of one insulating holding rod (50a). ), The cotter pin (1) is inserted into the connecting hole (41), and the cotter pin (1) is held in the state where the insertion hole (3) of the cotter pin (1) is oriented in the insertion direction of the cotter pin (10). The split pin (10) holding the head (11) of the pin (10) inserted into the holding hole (22) of the fixture (20) is held by the grip portion (51b) of the other insulating gripping rod (50b). After gripping the base (21) of the fixture (20) and inserting it into the insertion hole (3) against the spring force of the leg (12), the split pin (10) was left in the insertion hole (3). The insulator mounting method characterized by pulling out only the fixture (20). And co Ttapin (1), the head (11) and the legs (12) and the insulator (40) and cotter pin (10), were is inserted a mounting comprising a carrying spring force, two of the insulating A method of removing a lever by using a gripping rod (50a, 50b) , a lever pinching tool (52) and a removal tool (30) ,
Insulating grip bars (50a, 50b) have grips (51a, 51b) at their tips,
The cotter pin (1) includes a cylindrical body portion (2), an insertion hole (3) that penetrates perpendicularly to the central axis of the body portion (2) and inserts the split pin (10), and the body A hook part (4) formed at one end of the hook part (2) and engaged with the peripheral edge of the connecting hole (41) of the lever (40), and an insulating grip rod (50a) extending to the hook part (4) A plate-shaped gripping part (5) for gripping by the gripping part (51a), and a pointed tip part (6) formed at the other end of the body part (2),
The removal tool (30) is provided with a hook-shaped hook (32),
While holding the grip portion (5) of the cotter pin (1) with the grip portion (51a) of one insulating gripping rod (50a), the removal tool (30) is gripped by the grip portion (51b) of the other insulating grip rod (50b). ), Hook the hook (32) on the head (11) of the split pin (10), and operate the insulating grip bar (50b) to attach the leg (12) of the split pin (10) to the head (11). Pull out from the insertion hole (3) against the spring force, hold the lever (40) with the lever pinching tool (52), and operate one of the insulating gripping bars (50a) to pull out the cotter pin (1). Characteristic lion removal method. A flat base portion (21) made of rubber for gripping by the grip portion (51b) of the insulating gripping rod (50b), a tip portion (24) extending from the base portion (21), And a holding hole (22) having an elliptical cross section that is perforated in the tip portion (24) and holds the split pin (10). 11) A fixture characterized by being formed smaller. The fixture according to claim 3 , further comprising an auxiliary hole (23) orthogonal to and in communication with the holding hole (22).

Images