JPH0731022A - Attaching tool for tightening connector of manipulator - Google Patents

Abstract

PURPOSE:To provide a tool for allowing the attaching work of a tightening connector, being employed in distribution work when a main wire is branched, using a manipulator. CONSTITUTION:The attaching tool comprises a part 3 for holding a forked bolt, and a part 2 for holding a nut provided with a tightening metal disposed oppositely each other. A nut thus held is transferred by means of a spindle 5 operable through a manipulator to the side of bolt holding part where the nut is tightened. When the nut is tightened to a forked bolt, they are positioned positively and thereby tightened stably.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a manipulator tool capable of tightening a connector used for connecting electric wires in distribution work and the like.

[0002]

2. Description of the Related Art When branching from a main wire in distribution work on a utility pole, etc., as shown in FIG. 7, a main wire X and a branch wire Y are inserted into a forked bolt A, The main wire X and the branch wire Y are joined by screwing the nut B with the tightening metal fitting. Although such work is conventionally performed manually, there is a risk of electric shock, and therefore it is preferable that the manipulator can work. On the other hand, it is difficult to screw the nut with the tightening metal fitting into the bifurcated bolt, so that it is difficult to hold them directly by the manipulator and tighten them. In view of such circumstances, the present invention provides a tool that can reliably tighten a connector with a manipulator.

[0003]

A first feature of the present invention is that a nut mounting portion for holding a nut with a fastening metal fitting and a bolt mounting portion for holding a forked bolt are provided on a frame so as to face each other. A connector mounting tool which holds the bolt, conveys the nut to the bolt side while holding the nut in a direction corresponding to the bolt, fits the tightening bracket into the bifurcated bolt, and can screw the nut. It has been configured like this.

That is, the nut mounting portion includes a housing fixed to the frame and a rotary spindle that is inserted into the housing and moves forward and backward with respect to the bolt mounting portion. Here, the nut is held at one end of the rotating main shaft, and an operating portion for holding the nut with a manipulator hand is provided at the other end. Further, the rotation main shaft is provided with a rotation preventing mechanism that suppresses the rotation of the main shaft until the tightening fitting is fitted into the bolt and then allows the rotation. The bolt mounting portion includes a holding metal fitting that holds the bifurcated bolt in a direction in which the fastening metal fitting can be fitted on the axis of the rotary main shaft.

A second feature is a tightening connector mounting tool which also has a nut mounting portion and a bolt mounting portion facing each other on the frame, and is constructed so that the nut can be screwed while being pressed against the bolt side. It is in.

That is, the nut mounting portion includes an outer housing fixed to the frame, and an inner housing that moves forward and backward with respect to the bolt mounting portion without rotating in the outer housing.
It has a rotating spindle inserted in the inner housing. This rotating spindle has a nut holder that holds a nut with a tightening fitting at one end, and a socket shaft that is externally fitted to the nut holder and that is urged toward the bolt mounting part side by an elastic body, and is held by the manipulator hand at the other end. It is provided with an operation unit for doing. The inner housing is provided with a stop pin that engages with the socket shaft when the nut is in the nut mounting position and is disengaged when it is in the nut pushing position. The magnet and magnetic material are fixed so that the can be positioned at the nut mounting position or the nut pushing position. The nut mounting position means the initial position when the inner housing is retracted and separated from the bolt mounting portion and the bolt with the fastening metal fitting is mounted on the spindle. Also,
The nut push-out position means a position where the tightening fitting fits into the forked bolt and the nut is about to be screwed into the bolt. The bolt mounting portion has the same configuration as the first feature.

[0007]

EXAMPLES Examples of the present invention will be described below. [Tightening Connector] First, the fastening connector used in the tool of the present invention will be described. This connector, as shown in FIG.
It is composed of a bolt A having a V-shape and a forked thread portion, and a nut B with a tightening fitting that is screwed into the bolt A. The nut B with the tightening metal fitting is a T-shaped tightening metal fitting B1 loosely fitted in the nut hole B3 of the hexagonal nut B2.
Is just fitted into the notch A1 of the bifurcated bolt. Here, when the nut hole is viewed from the axial direction, two bow-shaped voids are formed by loosely fitting the tightening fitting B1.

At the time of tightening the electric wire, the main wire and the branch electric wire are fitted into the notched portion A1 of the forked bolt, and the tightening metal fitting is further attached.
B1 is also inserted so that the tip of the bifurcated bolt faces the bow-shaped gap. Then, when the hexagon nut B2 is screwed, the tightening metal fitting B1 also moves forward, and the electric wire is pressed against the forked bolt A to fix the electric wire. The electric wire contact portion B4 is formed on the V-shaped surface and is also provided with irregularities (not shown) for preventing the electric wire from shifting in the longitudinal direction.

(Embodiment 1) [Structure of tightening tool] As shown in FIG. 1, the tightening tool of the present invention comprises a rectangular plate-shaped frame 1 on which a nut mounting portion 2 and a bolt mounting portion are opposed to each other. Transport the nut held in the nut mounting part to the bifurcated bolt side fixed to the bolt mounting part,
It is screwed into this. Further, the operation unit 4 for operating the tool with a manipulator is also provided. Each component will be described in order.

{Nut mounting part} This holds the nut B with the tightening fitting, and is composed of a rotary main shaft 5 and a housing 6 which serves as a bearing thereof.

(Rotating Spindle and Housing) First, the rotating spindle 5 slides in the housing 6 as shown in FIG. 2 and conveys the nut B with the fastening metal fitting held at the tip to the bolt mounting portion side. It is composed of a cylindrical socket shaft 5A and an operation shaft 5B inserted therein. One end of the socket shaft 5A is formed with a large diameter so that the socket 7 and the nut holder 8 can be mounted inside, and a key groove 9 for suppressing rotation of the main shaft 5 is formed in the longitudinal direction on the outer peripheral surface of the other end. There is. The housing 6 is provided with a key 10 that fits into the key groove 9, and the key groove and the key serve as a rotation preventing mechanism.

As described above, the rotation of the main shaft 5 is suppressed by using the key so that the main shaft 5 is moved forward and the fastening metal fitting B1 is inserted into the notch A1 of the forked bolt until the fastening metal fitting is oriented in the bifurcated bolt. The reason is that the main shaft must be rotated in order to hold the hexagon nut B2 after that, and the main shaft must be rotated. When the main shaft 5 is advanced toward the bolt mounting portion side, the main shaft 5 does not rotate while the key 10 and the key groove 9 are fitted, but the tightening metal fitting B1 is just fitted into the notch portion A1 of the forked bolt, The key 10 is keyway 9 when the nut is about to be screwed.
It is configured so that the main shaft 5 can rotate.
The operation shaft 5B is connected to the other end of the socket shaft by a pin 11 and is connected to an operation unit 4 (described later) for operating the tool with a manipulator. On the other hand, the housing 6 is a portion directly held by the manipulator hand, and has an octagonal cross section so that it can be easily held from various directions.

(Socket and Nut Holder) Next, as shown in FIGS. 2 and 3, the socket 7 has a short cylindrical shape for holding a hexagonal nut, and a hexagonal hole 12 into which the nut is fitted is formed. There is. Groove (not shown) on top of socket 7
Is formed, and the socket 7 is prevented from rotating and fixed by screwing the set screw 13 therein. Therefore, by removing this screw and replacing it with a socket having a different size of hexagonal hole, it is possible to hold nuts of different sizes. In addition, a parallel position mark on the socket surface to check the orientation of the nut holder
14 are provided (Fig. 3).

On the other hand, the nut holder 8 holds the nut B with the tightening fitting. This is a head part having a notched part 15 at one end of a cylindrical member and a forked end, and a shaft part thinner than this, which is formed in a nut hole B3 of a nut with a tightening fitting. Insert this tip into the bow-shaped gap, and fix the orientation of the clamp B1 and hold it.

Further, as shown in FIG. 2, a spring 16 is fitted on the shaft portion at the other end of the nut holder. spring
16 is interposed between the rear end surface of the head portion of the nut holder and the step portion on the inner circumference of the socket shaft, and presses the nut holder 8. Further, grooves 17 are formed on both side surfaces of the head of the nut holder 8,
A positioning recess 18 is provided at the end of this groove.

When mounting the nut holder 8, the forked notch 15 of the nut holder is attached to the parallel position mark 14 of the socket.
Are parallel to each other, and the nut holder 8 is pressed into the socket shaft 5A against the repulsion of the spring 16. here,
A ball plunger 19 is projected so as to face the inner circumference of the socket shaft. Therefore, rotation of the nut holder 8 is prevented by fitting the ball at its tip into the groove 17, and when the nut holder 8 is further pushed in, the tip of the ball plunger 19 fits into the positioning recess 18 and the nut holder 8 The orientation of can be retained.

The ball plunger is urged by a spring so that the ball at the tip moves backward by being pressed, and is for holding the direction of the tip of the nut holder and preventing co-rotation of the socket shaft and the nut holder. . That is,
When trying to screw a nut, the socket shaft must rotate, but the bifurcated bolt is fitted with a tightening fitting, and this fitting is also fitted into the nut holder, so that the nut holder cannot rotate. Therefore, when a rotational force of a certain level or more is applied, the balls of the ball plunger are retracted and disengaged from the positioning recess 18, so that only the socket shaft rotates and the nut holder does not rotate. FIG. 3 shows a state in which the socket 7 and the nut holder 8 are mounted.

{Bolt mounting part} This is for fixing the bifurcated bolt A as shown in FIGS.
And a tightening shaft 21 for opening and closing the same.

(Holding Metal) As shown in FIG. 1, a bifurcated bolt is clamped from above and below to be fixed, and is composed of two holding plates 20 and a tightening shaft. A ball plunger 22 is provided so as to project from the opposing surfaces of the two holding plates 20, and one end of each holding body is screwed onto a tightening shaft. By rotating the tightening shafts, the distance between the two holding plates is adjusted. Can be used to fix forked bolts of different sizes. For example, in the case of No. 5 and No. 6 connectors, as shown in FIG. 1, the forked bolt A is inserted to the back of the holding metal fitting, and in the case of No. 4 connector, the holding plate 20 is placed at the position of the ball plunger 22 as shown in FIG. Tighten. Further, shallow V-shaped grooves are formed on the opposing surfaces of both holding plates 20 so that the held bolt A can be centered. Although this shallow V groove can be sufficiently centered, if more accurate centering is desired, a threaded surface corresponding to the bolt threaded surface may be formed instead of the V groove. This screw surface allows the holding plate to be brought into close contact with the bolt, and the bolt can be surely centered. The bifurcated bolt held by the holding metal fitting is held in a direction in which the inner plane of the threaded portion formed by the cutout portion is parallel to the frame, as shown in FIG.

(Tightening shaft) The tightening shaft 21 has a right-hand thread from one end,
A left screw is formed from the other end, and each holding plate is screwed into each screw (see FIG. 1 or 4). And the tightening shaft 21
The center can be fixed on the axis of the main shaft (on the axis of the nut with the tightening metal fitting) and rotated to change the distance between the two holding plates without changing the central position. That is, the bifurcated bolt can be fixed to the axial line of the nut with the tightening fitting regardless of the size of the bifurcated bolt held. FIG. 5 shows a state in which the bifurcated bolt A is fixed by the holding metal fitting.
The tightening shaft 21 is connected to the eyebolt 23 so that the tightening shaft 21 can be rotated.

{Operation section} This is for directly manipulating the manipulator hand to operate the spindle, and as shown in FIG. 6, a concave portion 4A to which the tip of the manipulator hand H fits.
Are formed. In this example, the ball joint 24
(Refer to FIG. 2) and is connected to the operation shaft 5B so that the angle of the operation portion 4 with respect to the main shaft 5 is variable so that it can be easily clamped from various angles.

[Operating Procedure] To operate such a tool,
Two manipulators with a hand that can be clamped and rotated at the tip are suitable. The manipulator on one side holds the housing 6 of the tightening tool, and the manipulator on the other side holds the operating portion 4 to operate the tool. The operating procedure is as follows.

(1) First, the eyebolt 23 of the bolt mounting portion 3
To fix the bifurcated bolt A with the holding metal fitting 20.

(2) Next, in the nut mounting portion 2, after confirming that the spring 16 is inserted inside the spindle, the nut holder 8 is press-fitted to fit the ball plunger into the positioning recess. Further, the socket 7 is also attached by the set screw 13.

(3) After that, the hexagonal nut B2 and the tightening metal fitting are attached to the hexagonal hole 12 of the socket and the forked notch 15 of the nut holder.
Insert B1 to hold nut B with a tightening fitting.

(4) When the above preparation is completed, as shown in FIG. 6, the housing 8 is held by one manipulator hand H, and the trunk and branch electric wires (not shown) held in parallel by the operator are held. Move this tool to the connection point.

(5) Then, the main wire and the branch electric wire are fitted into the notch A1 of the fixed bifurcated bolt A. Here, the manipulator hand H on the other hand holds the operating portion 4 and slides the main shaft 5 to convey the nut B with the tightening fitting to the forked bolt side. At this time, the main shaft 5 does not rotate due to the key engaging with the key groove, and the orientation of the fastening fitting B1 is maintained.

(6) When the tightening metal fitting B1 is fitted into the notch A1 of the bifurcated bolt, the main shaft 5 is released from the fitting with the key 10 and can be rotated. Rotate while pressing on.

(7) At this time, the socket shaft rotates,
The nut holder does not rotate. The socket shaft rotates independently of the nut holder by the ball plunger on the inner surface repeatedly engaging and disengaging from the positioning recess of the nut holder.

(8) Further, as the hexagonal nut is screwed, the socket shaft advances toward the bolt mounting portion side, while the nut holder abuts against the tip of the threaded portion of the bolt and cannot proceed. The relative displacement between the two is realized by the rear end surface of the head portion of the nut holder and the stepped portion on the inner circumference of the socket shaft approaching each other, and the spring interposed therebetween is compressed.

(9) By the above operation, the hexagon nut B2 is screwed into the forked bolt A, so that the main shaft 5 is retracted, and this time the other manipulator hand holds the hook (not shown).

(10) Then, the hook is engaged with the eyebolt 23 of the bolt mounting portion and rotated, and the holding metal fitting 20 is opened to release the bifurcated bolt A. It should be noted that the rotation of the main shaft may be about 5 to 6 rotations after the hexagon nut B2 is screwed into the bifurcated bolt A, and then it may be tightened using a hydraulic impact wrench or the like equipped with a socket dedicated to the hexagon nut.

(Embodiment 2) Next, a tightening connector mounting tool having a structure different from that of Embodiment 1 will be described with reference to FIGS. In the first embodiment, when the nut was screwed, the main shaft had to be rotated while being pressed against the bolt mounting portion side. On the other hand, in this embodiment, the socket shaft is biased toward the bolt mounting portion side by the spring, and the nut can be screwed by simply rotating the main shaft. As shown in FIG. 8, the tool of this example also has a nut mounting portion 32 and a bolt mounting portion 33 provided on the frame 31 so as to face each other, and the configuration of the bolt mounting portion 33 is the same as that of the first embodiment. The description will be centered on the configuration of the nut mounting portion 32, while omitting it.

[Structure of Tightening Tool] {Frame} As shown in FIG. 9, the frame 31 is an elongated rectangular plate, and one end side (the left side in the figure) has both side edges cut so as to be attached to the nut mounting portion. The trapezoidal cross section is formed, and a hole 39 for mounting the tightening shaft of the bolt mounting portion is formed on the other end side.

A large elongated opening 40 is formed in the center.
Is formed, and the pin-pulling plate 41 is fixed thereto. The pin removing plate 41 is a rectangular plate that pushes up a stop pin 49 described later to release the engagement between the stop pin 49 and the socket shaft 35A. As shown in FIGS. 8 and 9, a groove 42 is formed from one end in the longitudinal direction, and a stop pin 49 is fitted therein. In the vicinity of the groove 42, as shown in FIG. 8, the open end side of the groove 42 is thin and the closed end side thereof is thick to form an inclined surface 43. As the stopper pin 49 fitted in the groove 42 approaches the closed end side, the seat surface of the pin head slides up against the inclined surface 43 and is pushed up, and the socket shaft 35
It is pulled out from the circular hole 58 of A.

Further, a magnetic material 44 attracted to a magnet is fixed at two places in the central portion on one end side of the frame. This is for positioning the inner housing 36B at the nut mounting position (see the solid line in FIG. 8) or the nut pushing position (see the dashed line in FIG. 8) by being attracted to the magnet 53 of the inner housing 36B described later. is there. In this example, the frame 31 and inner and outer housings 36A and 36B described later are made of aluminum.

{Nut mounting part} Nut mounting part 32 of this example
Includes an outer housing 36A fixed to the frame 31, an inner housing 36B fitted into the outer housing and moving back and forth with respect to the bolt mounting portion 33 without rotating, and a rotary spindle 35 inserted in the inner housing 36B. Get

(Outer Housing) As shown in FIG. 10, the outer housing 36A has a pipe shape with an octagonal cross section. One end of the frame 31 is fitted into the frame 31, and a portion having a trapezoidal cross section fits the inner surface of the outer housing 36A and is integrated with a bolt 45. Also the outer housing
The magnetic material 46 is provided on 36A as well as the frame 31. In this example, it is provided at two places on each side face (left and right faces in FIG. 10) and two places on the top face (see FIG. 10), for a total of six places.

(Inner housing) On the other hand, the inner housing 36B
As shown in FIG. 10, is a columnar shape having a substantially hexagonal cross section in which rectangular adjacent corners are largely cut out, and a shaft hole 47 penetrating from one end to the other end is formed.
It fits inside the outer housing, and by adjoining the frame 31, it fits almost exactly the inner surface of the outer housing 36A with a shape of approximately 8
Make a rectangular cross section. Therefore, although it cannot rotate, it can slide axially in the outer housing, and moves forward together with the rotating main shaft, and the nut B with the tightening fitting held by this
Are transported to the bolt mounting side.

Further, as shown in FIG. 8, a stepped hole 48 reaching the shaft hole 47 is bored on the bottom surface (surface contacting the frame), and a stop pin 49 is provided therein. The stop pin 49 is
The pressing plate includes a head having a seating surface corresponding to the inclined surface 43 of the pin removal plate 41 and a shaft having a collar 50 near the tip.
Only the head is exposed by 51 and is inserted into the stepped hole. A spring 52 is externally fitted to the stopper pin 49 between the collar 50 and the pressing plate 51, and when the inner housing 36B is in the nut mounting position (solid line position in FIG. 8), the tip is inside the shaft hole of the inner housing 36B. It is urged to project to the circumference. At this time, since the collar 50 contacts the stepped portion of the stepped hole 48, the stop pin 49 does not slip out into the shaft hole.

Further, a magnet 53 for attracting the magnetic materials 44 and 46 of the frame 31 and the outer housing 36A is attached to the inner housing 36B. A magnetic force that can position the inner housing 36A at the nut mounting position or the nut pushing position is sufficient, and a commercially available permanent magnet or the like may be used. In this example, as shown in FIG. 10, a total of four magnets were provided on the upper and lower surfaces and both side surfaces.

When the inner housing 36B is slid in the direction away from the bolt mounting portion, the bottom end (the side away from the bolt mounting portion) of the inner housing 36B stops at the position where it abuts the bent piece 68 at one end of the frame. At this time, the magnet 53 faces the magnetic bodies 44 and 46 on the side away from the bolt mounting part, and the inner housing 36
B is held in the nut mounting position. Also, the inner housing
When 36B is slid to the bolt mounting portion side, the magnet 53 is held at the nut pushing position, facing the magnetic bodies 44 and 46 on the side close to the bolt mounting portion side. The shaft hole 47 has a stepped portion formed on the inner periphery thereof, and the diameter of the bolt mounting portion side is formed to be slightly larger than that on the opposite side.

(Rotation main shaft) The rotation main shaft 35 is, as shown in FIG. 8, inserted into a shaft hole 47 of an inner housing and holds a nut with a tightening fitting nut holder 38 and a socket shaft externally fitted thereto. It consists of 35A and an operating shaft 35B that rotates in synchronization with the socket shaft 35A.

First, the nut holder 38 holds the nut B with the tightening fitting as in the first embodiment. this is,
A cylindrical member is provided with a notch at one end to form a fork, and the other end is hollow, and a hollow head portion 54 and a shaft portion 55 thinner than this are formed.
The one end of the shaft portion is fitted into the hollow portion of the head portion and integrated by the pin 56. On the other hand, a ball plunger 57 is projectingly provided at a position opposite to the other end of the shaft portion. This is to determine the direction of the nut holder 38 by engaging the ball at the tip with a V groove (not shown) of the socket shaft 35A described below.

Next, the socket shaft 35A has a hollow cylindrical shape whose one end is thick and which is gradually tapered toward the other end, and the socket 37 (similar to the first embodiment) is fixed to one end. . The outer diameter of the fixed large diameter part of the socket 37 is much larger than the shaft hole diameter of the inner housing 36B, the middle part corresponds to the large diameter of the coaxial hole (bolt mounting side), and the small diameter of the other end. The portion is formed to be slightly thinner than the small diameter of the bolt hole (on the side opposite to the bolt mounting portion). Further, the inner diameter of the large diameter portion corresponds to the outer diameter of the socket 37 on the mating side, the middle portion corresponds to the outer diameter of the hollow portion of the nut holder 38 on the head side, and the small diameter portion of the inner diameter corresponds to the diameter of the opening end. Corresponding to the outer diameter of 35B, a portion near the large diameter portion is formed thinnest corresponding to the diameter of the other end of the shaft portion of the nut holder 38. Furthermore, on the inner peripheral surface of the portion with the smallest inner diameter,
V-grooves (not shown) along the axial direction are formed at opposing positions,
The ball plunger 57 engages. A circular hole 58 with which the stop pin 49 engages is formed in the middle portion, and a long hole 59 along the axial direction is formed in the small diameter portion.

On the other hand, the operating shaft 35B is a rod-like member which is fitted into the other end of the socket shaft 35A, and a pin 60 is projectingly provided at one end thereof, and the pin 60 is engaged with the long hole 59 of the socket shaft 35A. ing. As shown in FIG. 8, a ball joint 67 is provided at the other end, and the operation portion is connected to the tip of the ball joint 67 as in the first embodiment. Therefore, the manipulator can move the inner housing 36B forward and backward to rotate the socket shaft 35A.

As described above, the nut holder 38 is inserted into the socket shaft, and the spring 61 is externally fitted to the shaft portion 55 thereof. This corresponds to the spring 16 of the first embodiment, one end of which abuts on the inner end surface of the hollow cylinder of the head portion 54 and the other end of which abuts on the stepped portion 62 on the inner circumference of the socket shaft, and the nut holder 38 is placed on the bolt mounting portion side. Energize. At this time, in order to prevent the nut holder 38 from
63 is provided.

Further, the spring 64 is fitted on the small diameter portion of the socket shaft 35A. One end of this spring 64 abuts on a stepped portion 65 that changes from a small diameter portion on the outer periphery of the socket shaft to an intermediate portion, and the other end abuts on a stepped portion 66 on the inner periphery of the inner housing to place the socket shaft 35A on the bolt mounting portion side. Energize. However, as described above, at the nut mounting position, the locking pin 49 engages with the circular hole 58 of the socket shaft 35A, and the socket shaft 35A is held so as not to pop out.

When determining the direction of the nut holder 38, rotate the nut holder 38 so that the ball plunger 57 is attached to the socket shaft.
It suffices to engage with the V groove of 35A. This mechanism corresponds to the ball plunger 19 and the positioning recess 18 in the first embodiment. At the end of the inner housing 36B on the ball joint side, a flanged bush 69 is inserted in the gap between the inner housing 36B and the socket shaft 35A, and the pressing flange 70 fitted on the operating shaft 35B is brought into contact with this. ing. Then, the pressing plate 71 is fixed to the inner housing 36B with a bolt (not shown), and the bush 69 with the collar and the pressing flange are fixed.
Holds down 70.

[Operation Procedure] The operation procedure of such a tool will be described below. (1) First, the eye bolt 83 of the bolt mounting portion 33 is operated to fix the bifurcated bolt A with the holding metal fitting 80.

(2) Next, in the nut mounting portion 32, as shown in FIG.
As shown by the solid line, the inner housing 36B is aligned with the nut mounting position, the socket shaft 35A is pushed into the inner housing, and the stop pin 49 is engaged with the circular hole 58. At this time, the nut holder 38 is rotated so that the ball plunger 57 is engaged with the V groove of the socket shaft 35A and the orientation thereof is maintained.
Needless to say, the socket 37 is mounted on the socket shaft 35A.

(3) After that, the hexagonal nut B2 and the tightening metal fitting are attached to the hexagonal hole 12 of the socket 37 and the forked notch of the nut holder.
Insert B1 to hold nut B with a tightening fitting.

(4) When the above preparations are completed, the nut mounting portion is held by one manipulator hand H as in the first embodiment shown in FIG. Move this tool to the connection point. Then, the main wire and the branch electric wire are fitted into the notch A1 of the fixed bifurcated bolt A.

(5) Next, the other manipulator hand H
Hold the operation part and slide the inner housing 36B to the bolt mounting part side, and convey the nut B with the tightening fitting to the bifurcated bolt side. At this time, the inner housing 36B (socket shaft
35A) approaches the bolt mounting portion 32, the stop pin 49 is engaged with the groove 42 of the pin removing plate 41. Furthermore, the inner housing 36
When B is slid to the bolt mounting portion side, the head seat surface of the stop pin 49 is brought into sliding contact with the inclined surface 43 of the pin removal plate 41 and pushed up. Then, when the inner housing 36B reaches the nut pushing position (see the alternate long and short dash line in FIG. 8) and its magnet 53 faces the magnetic members 44 and 46 on the bolt mounting portion side, the fastening metal fitting is fitted to the forked bolt, At the same time, the engagement between the stop pin 49 and the circular hole 58 is released. Therefore, the elasticity of the spring 64 causes the socket shaft 35A to pop out, and the nut B2 is pressed against the bolt A.

(6) Here, a repulsive force acts on the inner housing 36B in a direction away from the bolt mounting portion, but since the magnet 53 and the magnetic bodies 44 and 46 are positioned, the inner housing 36B moves backward. There is no.

(7) Then, when the operation shaft 35B is rotated,
The socket shaft 35A also rotates due to the engagement of the long hole 59 and the pin 60,
Screw the nut B2 onto the bolt. At this time, the nut holder 38 is not rotated because the ball plunger 57 and the V groove of the socket shaft 35A are repeatedly engaged and disengaged.

(8) Further, since the socket shaft 35A is rotated by the spring 64 while pressing the nut B2 toward the bolt side, the nut B2 can be easily engaged with the bolt A.

(9) Further, as the hexagon nut B2 is screwed,
The socket shaft 35A advances toward the bolt mounting part side, but the nut holder 38 contacts the tip of the bolt and cannot move.
The positions of both are off. This relative displacement is realized by the pin 60 sliding through the long hole 59 of the socket shaft, the opening end surface of the nut holder head 54 approaching the stepped portion 62 on the inner circumference of the socket shaft, and the spring 61 being compressed. To be done.

(10) Then, the main shaft is rotated until the main and branch electric wires are sufficiently tightened between the tightening fitting and the forked bolt, and the hexagon nut B2 is screwed into the forked bolt A (two-dot chain line in FIG. 8). reference). If you need more certainty in tightening the hexagon nut B2, you can use a hydraulic impact wrench equipped with a socket for the same nut.

(11) After completing the above operations, remove the tool from the wire. First, the spindle 35 is retracted, and this time the other manipulator hand holds a hook (not shown). Then, the hook is engaged with the eyebolt 83 of the bolt mounting portion and rotated, and the holding metal fitting 80 is opened to release the bifurcated bolt A.

As described above, when the tool of this embodiment is used, the socket shaft is pressed toward the bolt mounting portion side, so that the nut can be screwed by simply rotating the main shaft. In the tool of the first embodiment, when the nut is screwed, it is necessary to rotate the main shaft while pressing it, and it requires skill in particular when the nut is bite into the bolt. It can solve various problems.

[0062]

As described above, with the tool of the present invention, it is possible to safely and easily perform the tightening work of the branch connector, which was conventionally done manually, by using the manipulator. Particularly, according to the tool of the second aspect, the nut is pressed against the bolt side, so that the nut can be easily bited into the bolt, and only the main shaft needs to be rotated.

[Brief description of drawings]

FIG. 1 is a side view showing an overall configuration of a tool of the present invention.

FIG. 2 is a sectional view showing a nut mounting portion of the tool of the present invention.

FIG. 3 is a perspective view showing a nut mounting portion of the tool of the present invention.

FIG. 4 is a sectional view showing a bolt mounting portion of the tool of the present invention.

FIG. 5 is an explanatory diagram showing a correspondence relationship between connectors fixed to a bolt mounting portion and a nut mounting portion.

FIG. 6 is an explanatory diagram showing a method of operating the tool of the present invention.

FIG. 7 is an explanatory view of the use of the connector used in the tool of the present invention.

FIG. 8 is a vertical sectional view of a tool of the present invention having a configuration different from that of FIG.

9 is a plan view showing a plate of the tool shown in FIG. 8. FIG.

10 is a cross-sectional view of a nut mounting portion of the tool shown in FIG.

[Explanation of symbols]

1,31 Frame 2,32 Nut mounting part 3,33 Bolt mounting part 4 Operating part 4A Recessed part 5,35 Main shaft 5A, 35A Socket shaft 5B, 35B
Operation shaft 6 Housing 7,37 Socket 8,38 Nut holder 9 Key groove 10 Key 11 Pin 12 Hexagon socket 13 Set screw 14
Parallel position mark 15 Notch 16 Spring 17 Groove 18 Positioning recess 19 Ball plunger 20,80 Holding plate 21,81 Tightening shaft
22 Ball plunger 23,83 Eye bolt 24 Ball joint 36A Outer housing 36B Inner housing 39 Hole 40 Opening 41 Pin removal plate 42 Groove 43 Inclined surface 44 Magnetic material 45 Bolt 46 Magnetic material 47
Shaft hole 48 Stepped hole 49 Stop pin 50 Collar 51 Presser plate 52 Spring
53 Magnet 54 Head 55 Shaft 56 Pin 57 Ball Plunger 58 Circular Hole
59 Long hole 60 Pin 61 Spring 62 Step 63 Holding ring 64 Spring 65 Step 66 Step 67 Ball joint 68 Bending piece 69
Bush with collar 70 Holding flange 71 Holding plate A Forked bolt
A1 Notch B Nut with tightening metal fitting B1 Tightening metal fitting B2 Hexagon nut B3 Nut hole B4 Wire contact part H Manipulator hand X Main wire Y Branch wire

Front page continuation (72) Inventor Ryoichi Saito 3-7-1, Ichibancho, Aoba-ku, Sendai City, Miyagi Prefecture Tohoku Electric Power Co., Inc. (72) Inventor Kazunobu Hoshina, 3-1, Suehirocho, Ishinomaki-shi, Miyagi Prefecture No. Tohoku Electric Power Co., Inc. Ishinomaki Sales Office (72) Inventor Yoshio Saito 1-2-1, Koriyama, Taihaku-ku, Sendai-shi, Miyagi Kita Nippon Electric Cable Co., Ltd. No. 2-1 North Japan Electric Cable Co., Ltd. (72) Inventor Naoki Aihara 1-2-1, Koriyama, Taishiro-ku, Sendai City, Miyagi Prefecture North Japan Electric Wire Co., Ltd. (72) Inventor Takeshi Wada Kitakawara, Itami City, Hyogo Prefecture No. 2 at Asahi Metal Seiko Co., Ltd. (72) Inventor Haruhiko Sakamoto Kitagawara, Itami City, Hyogo Prefecture No. 2 at No. 20 Asahi Metal Seiko Co., Ltd.

Claims (2)

[Claims] 1. A tightening connector mounting tool comprising, on a frame, a nut mounting part for holding a nut with a tightening metal fitting and a bolt mounting part for holding a forked bolt, which face each other. Includes a housing fixed to the frame and a rotary spindle that is inserted into the housing and moves forward and backward with respect to the bolt mounting portion. The rotary spindle has the nut at one end and the manipulator at the other end. Is provided, and a rotation preventing mechanism that engages with the housing to suppress rotation until the tightening fitting is fitted into the bolt and then releases the engagement to allow rotation is provided. The mounting part has a holding metal fitting for holding the bifurcated bolt in a direction in which the tightening metal fitting can be fitted on the axis of the rotary main shaft, and a branch connector tightening tool for a manipulator. 2. A tightening connector mounting tool comprising, on a frame, a nut mounting portion for holding a nut with a tightening fitting and a bolt mounting portion for holding a bifurcated bolt facing each other. Includes an outer housing fixed to the frame, an inner housing that moves forward and backward with respect to the bolt mounting portion without rotating in the outer housing, and a rotary spindle inserted into the inner housing. A nut holder for holding a nut with a metal fitting, a socket shaft that is fitted onto the nut holder and is biased toward the bolt mounting portion side by an elastic body, and an operating portion for holding the manipulator hand at the other end, The inner housing is provided with a stop pin that engages with the socket shaft when the nut is in the nut mounting position and is disengaged when the nut is in the nut pushing position. The magnet and the magnetic material are fixed to the inner housing and the inner housing so that the inner housing can be positioned at the nut mounting position or the nut pushing position, and the bolt mounting portion is oriented so that the tightening metal fitting can be fitted on the axis of the rotating main shaft. A branch connector tightening tool for a manipulator, characterized in that it has a holding metal fitting for holding the bifurcated bolt.