JP2005184868A - Securing device of hot-line work tool - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a device for securing a hot-line work tool, e.g. a stick being used for holding the repairing part of stringing, to a predetermined work position, e.g. the bucket of a vehicle for high lift work, such that the orientation of the forward end of the tool and its movement can be adjusted freely. <P>SOLUTION: A ball fixing head 2 is fixed movably up and down to a fixed frame 1 being fixed to a predetermined work position. The ball fixing head 2 is provided with a ball 5 having a stud 4, a part 6 for receiving the ball 5, and a means 7 for pressing the ball 5 against the ball receiving part 6 and securing the ball nonrotatably wherein the stud 4 is provided with a clamp 8 for clamping a hot-line work tool S removably. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention is for fixing a tool for hot-wire work such as a stick, a yatco, etc. used for performing live-line cutting work, skinning work, etc., to a predetermined work location, for example, a predetermined position of a bucket of an aerial work vehicle. The present invention relates to a fixing device for a live-line work tool.

  Since live line work involves danger, it is preferable to temporarily stop energization, but it is preferable to temporarily stop energization. Hot wire working tools such as sticks made of insulating material and Yatsuko are used.

  Conventionally, when using a live work tool such as the above, for example, when performing a stripping work of a covering portion of an overhead wire, two workers are put on the bucket of an aerial work vehicle, and one of them is Hold the stick with the holding tool attached to the tip, hold and fix the peeling part so that the overhead wire does not move, and another worker holds the stick with the peeling tool attached to the tip and remotely operates with this stick. However, the working method is such that the covering portion is peeled off.

  In the work method as described above, since two workers are required for hot-line work at one place, the present invention is designed to repair overhead wires so that one worker can perform live-line work. A live line for fixing a tool for live line work such as a stick used to hold the tool to a predetermined work position such as a bucket of an aerial work vehicle so that the direction and movement of the tool tip can be freely adjusted. It is an object of the present invention to provide a working tool fixing device.

  As shown in FIG. 2 and FIG. 5, the fixing device A for the hot-wire work tool according to the first aspect of the invention can move the ball mounting head 2 up and down on a fixed frame 1 that is fixedly attached to a predetermined work location. The ball mounting head 2 has a ball 5 with a stud 4, a ball receiving part 6 for receiving the ball 5, and a pressure fixing means 7 for fixing the ball 5 to the ball receiving part 6 so as not to rotate. And the stud 4 is provided with a clamp 8 for removably fixing the hot work tool S.

  According to a second aspect of the present invention, in the fixing device for a hot-wire work tool according to the first aspect, a large number of semicircular concave portions 17 having a cross section are formed on the outer peripheral surface of the ball.

  The fixing device according to the first aspect of the present invention attaches a ball mounting head to a fixed frame so as to be movable up and down, and a ball with a stud, a ball receiving portion for receiving the ball, and a ball crimped to the ball receiving portion to the ball mounting head And a clamp for fixing the hot wire working tool so as to be detachable. The fixing device is used for, for example, an overhead wire. Because the hot work tool that holds the repaired part of the machine can be fixed at the required work position in the desired posture, the worker must have another hot work tool alone. Therefore, it is only necessary to perform the necessary hot-line work while performing remote control. Therefore, the hot-line work that has been conventionally performed by two persons can be performed by one person, which contributes to saving of labor costs.

  Also, with this fixing device, the ball mounting head can be moved up and down with respect to the fixed frame and fixed at an arbitrary position, so the height of the fixing position of the hot work tool can be adjusted, and the hot work tool can be fixed. Work becomes easier.

  Since the fixing device of the invention according to claim 2 is formed with a large number of recessed portions on the outer peripheral surface of the ball, when the ball is pressed against the ball receiving portion by the pressing member, the recessed portion becomes the ball receiving portion. It exerts a biting action on the concave curved surface of the ball, and the biting action can firmly fix the ball to the ball receiving portion, thereby securely fixing the tool for hot work in a desired posture, and particularly Since each concave recess is formed in a semicircular cross section, the biting action can be reliably exerted on the concave curved surface of the ball receiving portion regardless of the direction the ball rotates.

  1 is a perspective view showing a use state of a fixing device A for a hot-wire work tool according to the present invention, FIG. 2 is an enlarged perspective view of the fixing device A, FIG. 3 is a front view of the fixing device A, and FIG. 5A is a side view of the fixing device A, FIG. 5A is an enlarged vertical sectional view of the main part of the fixing device A, and FIG. 5B is a side view of the clamp 8 of the fixing device A. In these drawings, 1 is a fixed frame attached and fixed to a bucket B of an aerial work vehicle K, 2 is a ball mounting head attached to the fixed frame 1, and can slide up and down with respect to the fixed frame 1 and around an axis O A reinforced plastic support column 2b that can be rotated, and a metal head main body 2a provided at the upper end of the support column 2b. The ball receiving portion 6 having a concave curved surface for receiving the ball 5 and the pressure fixing means 7 for fixing the ball 5 to the ball receiving portion 6 so as to be unrotatable are provided. A clamp 8 for removably fixing the stick S as a live work tool is continuously provided. The fixed frame 1 is provided with a pair of left and right auxiliary bars 3 and 3.

  As shown in FIG. 5A, the head body 2a of the ball mounting head 2 is prevented from being pulled out by the flange 9a, 10a on the cylindrical outer cylinder 9 and the upper side in the outer cylinder 9. A cylindrical ball holding cylinder 10 fitted in a state, and a cylindrical support member 11 screwed into the lower side of the outer cylinder 9 and fixed with a screw a. The inner diameter is slightly larger than the diameter of the ball 5, but the tip portion gradually becomes smaller in diameter to form the concave curved ball receiving portion 6, and the ball 5 rotates on the ball receiving portion 6. The studs 4 are engaged with each other, and the studs 4 protrude integrally from the ball holding cylinder 10 outward. The stud 4 may be formed separately from the ball 5 and connected.

  The ball holding cylinder 10 of the head main body 2a is provided with a notch groove portion 10b through which the stud 4 of the ball 5 can be inserted, and the stud 4 extends from the vertical position shown by the solid line in FIG. As can be seen, the rollover is possible up to nearly 90 °. Note that the stud 4 can be tilted from the vertical position to about 30 ° where the notch groove portion 10b is not provided. The ball receiving portion 6 is formed in a concave curved surface having substantially the same curvature as the outer peripheral surface of the ball 5.

  As shown in FIG. 5 (a), the crimping fixing means 7 includes a female screw portion 12 concentrically fitted in the support member 11 of the head body 2a and fixed to the support member 11 with screws b, and the female screw. A male screw part 13 screwed to the part 12 and a pressing member that is crowned on a disc-like head part 13a formed coaxially with the upper end of the male screw part 13 via a thrust bearing 14 and pressed against the ball 5 15 and an operating lever 16 for rotating the male screw portion 13 from the outside of the head body 2a. The operation lever 16 has an inner end portion screwed into the screw hole c of the head portion 13 a and an outer end portion side protruding from the horizontally long window 9 a of the outer cylinder 9. The thrust bearing 14 consists of needle bearings.

  Thus, when the operating lever 16 is rotated by a certain angle from one end side to the other end side of the horizontally long window 9a, the male screw portion 13 screwed with the female screw portion 12 is screwed toward the ball 5 in a threaded manner. The pressing member 15 is pressed against the ball 5 via the thrust bearing 14, whereby the ball 5 is pressed against the ball receiving portion 6 of the holder portion 3, and the ball 5 is fixed to the holder portion 3 side so as not to rotate. . When the operation lever 16 is turned in the opposite direction, the male screw portion 13 is screwed away from the ball 5 with respect to the female screw portion 12, and the pressure-bonding action of the ball 5 to the ball receiving portion 6 is released. It can freely rotate with respect to the portion 3.

  In this case, the thrust bearing 14 interposed between the head portion 13a of the male screw portion 13 and the pressing member 15 does not rotate the pressing member 15 even if the male screw portion 13 side rotates. Since there is no rotational contact friction force between the pressing member 15 and the ball 5 sometimes, the lever 16 can be easily operated. In particular, since the thrust bearing 14 is made of needle bearing, the rotational contact friction force generated between the male screw portion 13 side and the pressing member 15 is reduced, and the lever 16 can be operated more easily.

  Further, as shown in FIG. 5A, since a large number of recessed portions 17 are formed on the outer peripheral surface of the ball 5, when the ball 5 is pressed against the ball receiving portion 6 by the pressing member 15, the pressure is pressed. In addition, the concave portion 17 exerts a biting action on the concave curved surface of the ball receiving portion 6, and the ball 5 is securely fixed to the ball receiving portion 6 by the biting action. In particular, since each recessed portion 17 is formed in a semicircular cross section, no matter which direction the ball 5 rotates, it bites against the recessed curved surface of the ball receiving portion 6 regardless of its rotational position. Can be demonstrated.

  As shown in FIGS. 5 (a) and 5 (b), the clamp 8 connected to the stud 4 of the ball 5 is fitted to the tip of the stud 4 and fixed by a pin 18; A movable member 21 that can move in parallel with respect to the fixed member 19 is provided via two left and right guide rods 20 and 20. The guide rod 20 protrudes vertically downward from both ends of the movable member 21 and is inserted and supported in the guide hole 19 a of the fixed member 19. The guide rod 20 is fitted with a coil spring 22 for holding the movable member 21 at an appropriate interval with respect to the fixed member 19 and facilitating insertion of a hot wire working tool. Further, sandwiching portions 19a and 21a having a substantially V-shaped cross section for sandwiching a stick S as a live-line work tool are formed on the opposing surfaces of the fixed member 19 and the movable member 21. Further, a screw shaft 23 is erected at the center of the fixed member 19, and this screw shaft 23 is inserted into the hole 21 b of the movable member 21, and a tightening operation handle 24 is screwed to the tip thereof. Yes.

  When using the clamp 8, as shown in FIG. 5B, the stick S is inserted between the holding portions 19 a and 21 a of the fixed member 19 and the movable member 21 and is screwed onto the screw shaft 23. By rotating the tightening operation handle 24 in the tightening direction against the urging force of the coil spring 22, the movable member 21 approaches the fixed member 19 side, and various diameters are provided between the holding portions 19a and 21a. The stick S can be clamped and fixed.

  The support 2b of the ball mounting head 2 is made of a cylindrical member made of reinforced plastic (FRP), and is provided on the upper support cylindrical member 25 installed on the upper part of the fixed frame 1 and on the lower part in the fixed frame 1. The lower support cylindrical member 26 is inserted and supported so as to be vertically slidable and rotatable, and by tightening a tightening bolt 27 attached to the upper support cylindrical member 25, it can be at an arbitrary height position and rotation position. It can be fixed. The tightening bolt 27 is provided with a knob 27a for rotating operation.

  The fixed frame 1 attached and fixed to the bucket B of the aerial work platform K includes a pair of left and right U-shaped side plates 28 and 28 formed in a downward U-shape, as shown in FIGS. Side wall 31 of bucket B as shown in FIGS. 2 and 4 by upper plate 29 connecting the upper ends of U-shaped side plates 28, 28 and lower connecting plate 30 connecting the lower ends of both U-shaped side plates 28, 28. It is formed in a bowl shape straddled on. Each U-shaped side plate 28 is formed in a downward U-shape with both front and rear leg portions 28a, 28b and a connecting portion 28c.

  The upper support cylindrical member 25 is fixed to the upper frame 29 of the fixed frame 1 at a position close to one side plate 28 of the left and right U-shaped side plates 28, 28 and closer to the rear end side. A lower support cylindrical member 26 is attached and fixed to the U-shaped side plate 28 and the lower connecting plate 30 at a position directly below the cylindrical member 25, and the support column 2b can be slid up and down on both the upper and lower support cylindrical members 25 and 26 and rotated. It is inserted and supported as possible. Further, a screw shaft 32 extending in the front-rear direction is pivotally supported on the lower connecting plate 30, and a disc that is in contact with the outer surface 1 of the side wall 3 of the bucket B as shown in FIG. A pressing member 33 is attached, and a rotation operation lever 34 is attached to the proximal end portion of the screw shaft 32.

  The fixed frame 1 is equipped with a pair of left and right auxiliary rods 3 and 3 in order to attach the fixed frame 1 to the side wall 31 of the bucket B in a stable state. Each auxiliary bar 3 is made of plastic and has a length that is slightly shorter than the height of the bucket B, and the outer side surface of the rear leg portion 28b of the U-shaped side plate 28 that forms the fixed frame 1. The lower end portions of the auxiliary rods 3 and 3 are connected to each other by a connecting member 36, and the lower end portion of the outer surface of the side wall 31 of the bucket B is inside the connecting member 36. An abutting member 37 that abuts is attached (see FIG. 4).

  Therefore, in order to attach the fixed frame 1 to the bucket B of an aerial work vehicle, the left and right U-shaped side plates 28 and 28 are attached to the upper end of the side wall 31 of the bucket B as shown in FIGS. The screw shaft 32 is screwed forward by the rotation operation lever 34, the pressing member 33 at the tip of the screw shaft 32, and the front leg portions 28a, 28a of the U-shaped side plates 28, 28, respectively. Thus, the side wall 31 of the bucket B may be sandwiched. The pad 38 is made of synthetic rubber, and has a role of stably attaching the side plates 28, 28 in close contact with the upper end of the side wall 31 of the bucket B.

  When the fixing device A configured as described above is used to perform a live work of the overhead wire C as shown in FIG. 1, for example, a peeling operation of the covering portion, first, the fixing frame 1 of the fixing device A is used. Is attached to and fixed to the required portion of the bucket B of the aerial work vehicle K. At this time, the pressure fixing means 7 of the ball mounting head 2 sets the operation lever 16 at a lock release position where the pressure bonding action of the ball 5 against the ball receiving portion 6 is released, and the clamp 8 provided on the stud 4 The ball 5 can be freely swung in any direction around the ball 5.

  Then, the operator M holds the stick S with the holder E attached to the tip, and holds the required part of the peeling portion with the holder E, and appropriately fixes the clamp 8 side of the fixing device A around the ball 5 as appropriate. And the base end of the stick S is clamped and fixed to the clamp 8. At this time, the ball mounting head 2 is moved up and down with respect to the fixed frame 1 to adjust the height of the ball mounting head 2 appropriately, and the clamp 8 side is swung and held according to the direction of the tip of the stick S. The stick S is appropriately moved in the length direction according to the holding position of the tool E, and the base end portion of the stick S is fixed by the clamp 8 in a state where the stick S is in a desired posture. Thereafter, the stick 16 is fixed to the bucket B as shown in FIG. 1 by rotating the lever 16 of the crimping fixing means 7 to the locked position and fixing the ball 5 to the ball mounting head 2 so as not to rotate. The apparatus main body 1 is fixed in a desired posture.

  At this time, the lower ends of the pair of left and right auxiliary rods 3, 3 mounted on the fixed frame 1 are abutted and supported on the outer surface of the side wall 31 of the bucket B via the abutting members 37 (see FIG. 4). 1 is prevented from falling to the outer side of the bucket B, whereby the fixed frame 1 can be stably and firmly attached to the bucket B.

  Thus, after fixing the stick S holding the required part of the peeling portion to the bucket B by the fixing device A, the operator M holds another stick S ′ with the peeling tool F attached to the tip, and this stick S The covering portion of the overhead wire C is peeled off while being remotely operated with ′.

  As described above, according to the fixing device A of the present invention, the stick S that holds the required portion of the peeling portion is appropriately adjusted in the three-dimensional direction at the predetermined portion of the bucket B so that the overhead line C does not move. Since it can be fixed in a desired posture necessary for the work, the worker M can carry out the peeling work of the covering portion while remotely operating by holding another stick S ′ alone. In this case, if necessary, a plurality of sticks S can be used to fix them to the required position of the bucket B.

  In particular, according to this fixing device A, the ball 5 can be locked and unlocked with respect to the ball receiver 6 only by rotating the lever 16 within a certain angle range. Removal work is easy and easy. Further, since the ball mounting head 2 can be moved up and down with respect to the fixed frame 1 and fixed at an arbitrary position, the height of the fixing position of the hot work tool can be adjusted, and the hot work tool can be fixed further. It becomes easy. Further, since a large number of recessed portions 17 are formed on the outer peripheral surface of the ball 5 of the ball mounting head 2, when the ball 5 is pressed against the ball receiving portion 6 by the pressing member 15, the recessed portion 17 is It exerts a biting action on the concave curved surface of the receiving part 6, and the ball 5 can be firmly fixed to the ball receiving part 6 by the biting action, thereby securely fixing the tool for hot work in a desired posture. Can do. In particular, since each concave recess 17 is formed in a semicircular cross section, the biting action can be reliably exerted on the concave curved surface of the ball receiver 6 regardless of the direction in which the ball 5 rotates.

  In the above-described embodiment, only the stick S is illustrated as the hot-wire work tool to be fixed to the fixing device A. However, tools other than Yatsuko and other sticks S can also be fixed. The apparatus main body 1 is not limited to the bucket B of the aerial work vehicle K, and can be attached and fixed to a predetermined work location.

It is a perspective view which shows the use condition of the fixing device of the tool for hot wire work which concerns on this invention. It is an expansion perspective view of the fixing device. It is a front view of the fixing device. It is a side view of the fixing device. (a) is an enlarged vertical sectional view of the main part of the fixing device, and (b) is a side view of a clamp of the fixing device.

Explanation of symbols

S, S 'stick (tool for live work)
A Fixing device 1 for a tool for hot-wire work Main body 2 Ball mounting head 2a Head main body 3 Auxiliary bar 4 Stud 5 Ball 6 Ball receiving portion 7 Screw-type crimp fixing means 8 Clamp 17 Semicircular recess in cross section

Claims (2)

  A ball mounting head 2 is mounted on a fixed frame 1 mounted and fixed at a predetermined work location so as to be movable up and down. The ball mounting head 2 has a ball 5 with a stud 4, a ball receiving portion 6 for receiving the ball 5, Crimp fixing means 7 for fixing the ball 5 to the ball receiving portion 6 so as to be unrotatable is provided, and the stud 4 is provided with a clamp 8 for detachably fixing the hot wire working tool S. Fixing device for work tools. The hot wire working tool fixing device according to claim 1, wherein a plurality of semicircular concave portions 17 having a cross-section are formed on an outer peripheral surface of the ball 5.

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