JPH07121491B2 - Nut installation and removal tool for overhead distribution lines - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a nut attaching / detaching tool for an overhead distribution line, for removing and attaching a nut for fixing, for example, a discharge clamp that supports the overhead distribution line in a live state. is there.

(Prior Art) Recently, it has been attempted to attach an aerial distribution line to a column arm via a discharge clamp to prevent an accident due to a lightning strike. In order to install such a discharge clamp, the insulator that has conventionally attached the overhead distribution line to the armband is removed, and then this discharge clamp is attached. Recently, it has been proposed to safely perform hot-line work on such a pillar by a robot, but in this case, a nut attachment / detachment tool to be attached to the tip of the robot arm is required. There are a plurality of nuts for mounting the discharge clamp, and it is preferable that the plurality of nuts can be tightened at the same time because workability is improved.

Generally, in various fields, a nut tightening machine that tightens a nut to attach a component to a threaded portion of an attached object (for example, see Japanese Utility Model Laid-Open No. 55-80137), and an object to be attached to replace the component A nut removing device for removing the nut from the screw portion (for example, see Japanese Utility Model Laid-Open No. 58-67631) has been proposed.

Since these nut tighteners and nut removers are all used on the ground, it is difficult to see the tool align with the nut as the working parts of these equipment can be easily aligned with the nut. It is not possible to directly apply it to the work of overhead distribution lines that is work at high altitudes, and with conventional equipment, it is not possible to remove the nut and tighten the nut with a common tool, so Has to be replaced, which has the drawback of requiring a long working time in high places.

(Object of the Invention) An object of the present invention is to easily attach and detach nuts for fixing components fixed to overhead distribution lines, such as insulators for supporting the overhead distribution lines and discharge clamps, at high places without changing tools. An object of the present invention is to provide a nut attaching / detaching tool for an overhead power distribution line.

(Structure of the Invention) A nut attaching / detaching tool for an overhead distribution line according to the present invention includes a plurality of nut attaching / detaching tool bodies arranged in parallel so as to detach a nut for fixing a discharge clamp or the like supporting the overhead distribution line, and A fixed frame attached to the robot arm that moves the tool body to the vicinity of the distribution line, and a plurality of movable frames that are slidably supported by the fixed frame and that are equipped with the tool body and that move the tool body forward and backward with respect to the nut. , A plurality of linear fluid drive sources that drive a plurality of movable frames attached to the fixed frame so as to slide on the fixed frame, and a plurality of tool bodies are rotatably supported on the plurality of movable frames, respectively. It is connected to multiple drive shafts via unit-versal joints with self-aligning springs, and multiple movable frames are connected to multiple drive shafts so that the tool body is aligned with the nut tightening direction. A plurality of fluid motors that respectively reversibly rotate in the removal direction are mounted, and the linear fluid drive source is set to advance and retract the movable frame as the fluid motor rotates.

With this configuration, the multiple nut attachment / detachment tool bodies are mounted on the fixed frame attached to the robot arm, so the nuts that fix parts such as the insulator and the discharge clamp that support the overhead distribution line can be attached and detached at high places. However, since each tool body advances and retreats by each linear fluid drive source while rotating by each fluid motor, nut tightening can be performed by matching the rotation of the fluid motor and the linear motion of the linear fluid drive source. The nut can be removed by using the common tool body, and therefore the nut can be attached and detached without changing the tool.

Also, since each tool body is connected to the drive shaft via a universal joint having a spring for self-alignment, it follows the bending action of the universal joint even if the drive shaft side slightly shakes at high places. The tool body can be kept securely engaged with the nut, and the tool body can be bent by a universal joint, but it is normally extended straight by a self-aligning spring. Since it is held, it is possible to reliably perform the work of engaging the tool main body with the nut when removing the nut, or screwing the nut in the tool main body to the screw part for component mounting when tightening the nut. In addition, this self-aligning spring can also have a function of elastically tightening the nut by elastically acting the tool body on the nut.

(Embodiment) An embodiment of the present invention will be described in detail with reference to the drawings. FIGS. 1 and 2 show a nut attaching / detaching tool 10 for an overhead distribution line according to the present invention, and FIG. The usage state of the electric wire nut detachment tool 10 is shown. As shown in FIG. 3, the nut attaching / detaching tool 10 for the overhead distribution line is a discharge clamp for fixing the discharge clamp 36 or the like supporting the overhead distribution line 34 to the arm 40.
It consists of cylindrical spanners that are arranged in parallel so that the nut 38 that is tightened and fixed to the threaded portion 36a of the 36 or the like is detached.
Two nut attachment / detachment tool bodies 12, 12 'and a robot arm 14 for moving the tool bodies 12, 12' to the vicinity of the overhead distribution line (3rd
Fixed frame 16 with flange 16a attached to
And the tool body 12, 1 supported slidably on this fixed frame 16.
Two movable frames 18 and 18 'for advancing and retracting the tool main body 12 and 12' having 2's mounted respectively, and a movable frame 1 attached to the fixed frame 16
Two linear fluid drive sources 20, 20 ', which are air cylinders for respectively driving the slides 8 and 18' on the fixed frame 16, are provided. The movable frames 18 and 18 'are respectively engaged with the two guide bars 17 and 17' of the fixed frame 16 as shown in FIG. The tool bodies 12, 12 'are connected to drive shafts 24, 24' rotatably supported on the sliding frames 18, 18 'through universal joints 26, 26', respectively, and the movable frame 1
Two fluid motors 28, 28 'such as an air motor for rotating the drive shafts 24, 24' are mounted on 8, 18 ', respectively. These fluid motors 28, 28 'are connected to drive shafts 24, 24' via speed reducers 30, 30 '. Tool body 12, 12 '
In order to reduce the size of the linear fluid drive sources 20 and 20 'that linearly move and the fluid motors 28 and 28' that rotate and drive the tool bodies 12 and 12 ', respectively, as shown in FIG. It is preferably arranged in parallel. Further, as can be seen from FIG. 1, the universal joints 26 and 26 'are arranged around the tool bodies 12 and 12' so as to elastically engage the tool bodies 12 and 12 ', and the drive shafts 24 and 24'. And tool body 12,
It has springs 32, 32 'for self-alignment provided between the springs 12' and 12 '. These springs 32, 32 'are normally compressed between the drive shafts 24, 24' and the tool bodies 12, 12 'so that the tool bodies 12,
12 'has a self-aligning action of holding the 12' aligned with the drive shafts 24, 24 'so as to extend straightly.
Universal joint even if there is some shaking on the 24 'side
Following the bending action of 26, 26 ', the tool bodies 12, 12' are swung up, down, left and right with respect to the axes of the drive shafts 24, 24 'so as to keep the nut 38 securely engaged with the nut 38. I am able to do so.

Next, referring to FIG. 3 showing a state of using the nut attaching / detaching tool of the present invention, FIG. 3 shows, for example, a state in which the insulator supporting the overhead distribution line 34 has been exchanged with the discharge clamp 36. For this purpose, first, an insulator (not shown) attached to the position of the discharge clamp 36 in FIG. 3 is shown.
The nut 38 securing the must be loosened. In this case, first, the air cylinders, which are the linear fluid drive sources 20 and 20 ', are extended and the tool bodies 12 and 12' are projected, and the tool bodies 12 and 12 'are operated by operating the robot arm 14. The tool body 12, 12 'is brought close to the nut 38 and the tool bodies 12 and 12' are engaged with the nut 38 to complete the preparation for work. Next, fluid motor 2
While driving 8, 28 ', the air cylinders that are the linear drive sources 20, 20' are gradually contracted in accordance with the rotational speeds of the fluid motors 28, 28 '. In this way, the tool bodies 12, 12 'can be retracted while loosening the nut 38, and the nut 38 can be removed from the insulator. In this case, the tool bodies 12 and 12 'are attached to the universal joint 26, the springs 32 and 32' for self-alignment,
Since 26 'is held straight and held so as to extend in alignment with the drive shafts 24, 24', the nut bodies 38 can be securely engaged with the tool bodies 12, 12 '. Further, even if the drive shafts 24, 24 'are slightly shaken at a high place, the self-aligning springs 32, 32' follow the bending action of the universal joints 26, 26 'so that the tool bodies 12, 12' are Since the state in which the nut 38 is reliably engaged is maintained, the nut removing work at a high place can be reliably performed.

After that, as shown in FIG. 3, when the nut 38 is tightened for replacing the insulator with the insulator 40 and attaching the discharge clamp 36 to the arm 40, the nuts engaged in the tool bodies 12 and 12 '. The robot arm 14 is operated so that the screw 38 is screwed into the screw portion 36a of the discharge clamp 36, and while the fluid motors 28, 28 'are driven in the opposite direction, the speed corresponding to the rotational speed of the fluid motors 28, 28'. The air cylinders that are the linear fluid drive sources 20 and 20 'are gradually expanded. This way, the tool body
12, 12 'tightens the nut 38 to the discharge clamp 36 to fix it.

In this case, the tool body 1
2 and 12 'are drive shafts with the universal joints 26 and 26' held straight by springs 32 and 32 'for self-alignment.
Since it is held so that it extends in line with 24, 24 ',
The nut 38 in the tool body 12, 12 'can be securely screwed into the screw portion 36a. Similarly, drive shaft 2
Self-aligning springs 32, 3 even if there is some shaking on the 4, 24 'side
The 2'follows the bending action of the universal joints 26, 26 ', so that the tool bodies 12, 12' are maintained in the state in which the nut 38 is securely screwed, so that the nut tightening work at a high place is surely performed. It can be carried out. Further, the self-aligning springs 32 and 32 'also have a function of elastically acting the tool bodies 12 and 12' on the nut 38 to tighten the nut.

(Effect of the Invention) According to the present invention, as described above, a plurality of nut attachment / detachment tool bodies are mounted on the fixed frame attached to the robot arm,
The nuts that fix parts such as insulators and discharge clamps that support the overhead distribution line can be removed at high places, but since each tool body rotates by the fluid motor, it moves back and forth by each linear body drive source. By combining the rotation of the fluid motor and the linear motion of the linear fluid drive source, the tightening of the nut and the removal of the nut can be performed using the common tool body, and therefore, without changing the tool at a high place, The nuts for attaching the parts of the overhead power distribution line can be detached and the parts can be efficiently replaced.

Also, since each tool body is connected to the drive shaft via a universal joint having a spring for self-alignment, it follows the bending action of the universal joint even if the drive shaft side slightly shakes at high places. Since the tool main body can be maintained in the state of being securely engaged with the nut, the nut can be securely attached and detached at a high place, and the tool main body is bendable by the universal joint. , Normally, it is held so as to extend straight by a self-aligning spring, so the tool body is engaged with the nut when removing the nut, or the nut in the tool body is used as the thread part for mounting parts when tightening the nut. There is a real benefit of being able to reliably perform work such as screwing.

In addition, the self-aligning spring around the universal joint also has the function of elastically tightening the nut by elastically acting the tool body on the nut, so the number of parts does not increase and the overall size is small. There is a real benefit that can be realized.

[Brief description of drawings]

1 and 2 are a front view and a side view of a nut attaching / detaching tool for an overhead distribution line according to the present invention, and FIG. 3 is a view showing a usage state of a tool body. 10 …… Fixed power line nut removal tool, 12,12 ′ …… Tool body, 14 …… Robot arm, 16 …… Fixed frame, 18,18 ′ …… Movable frame, 20,20 ′ …… Linear drive source , 24,24 ′ …… Drive shaft, 26,2
6 '... Universal joint, 28,28' ... Fluid motor, 32,32 '... Self-aligning spring, 34 ... Overhead distribution line,
36 …… Discharge clamp, 36a …… Screw part, 38 …… Nut.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hiroshi Watanabe 6 Yawata Kaigan Dori, Ichihara City, Chiba Furukawa Electric Co., Ltd. Chiba Electric Wire Co., Ltd. (72) Inventor Jo Takeuchi 6 Hachiman Kaido Dori, Ichihara City, Chiba Furukawa Electric Co., Ltd. Company Chiba Electric Wire Works

Claims (1)

[Claims] 1. A plurality of nut attachment / detachment tool bodies arranged in parallel so as to attach / detach nuts for fixing a discharge clamp or the like supporting an overhead distribution line, and a robot arm for moving the tool body to the vicinity of the overhead distribution line. A fixed frame mounted on the fixed frame, a plurality of movable frames slidably supported by the fixed frame and moving the tool main body forward and backward with respect to the nut, and a plurality of movable frames mounted on the fixed frame. A plurality of linear fluid drive sources that drive a plurality of movable frames so as to slide on the fixed frame, and the plurality of tool bodies are a plurality of drive shafts rotatably supported on the plurality of movable frames. To each of the plurality of movable frames connected to the plurality of drive shafts to remove the tool body from the nut tightening direction. A plurality of fluid motors that reversibly rotate in opposite directions, respectively, and the linear fluid drive source is set so as to advance and retract the movable frame as the fluid motor rotates. Wiring nut removal tool.