JPH05318329A - Holding and fixing device on electric pole - Google Patents

Abstract

PURPOSE:To provide a holding and fixing device used on an electric pole for mounting machines and tools on the electric pole with which they can be held and fixed securely even on a one-arm robot and also holding and fixing work can be performed in a short time. CONSTITUTION:When a swing lever 32 is swung upward, a screw lever 16 is rotated in one direction through a one-way clutch and a pivot arm 22 which is engaged with the screw lever 16 moves a holding frame 14 to a holding frame 14' to hold an electric pole 12 between these holding frames 14 and 14'. When a screw section of a pivot arm 22 is disengaged from the screw lever 16, the holding frame 14 is separated from the holding frame 14' by a coiled spring 40 to remove the holding frames 14 and 14' from the electric pole 12.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a utility pole holding fixture used for mounting a machine or a tool on a utility pole by a robot operation.

[0002]

2. Description of the Related Art A utility pole grip fixture 50 of this prior art is
As shown in FIGS. 7 to 9, a fulcrum screw 54,
54 ', a pair of semicircular gripping frames 56, 5
6 ', and between the open ends of the pair of gripping frames 56, 56', the open spring 58 normally biases the pair of gripping frames 56, 56 'to open.
Is provided. At the open end of one of the grip frames 56, a support pin 64 fixed to the head of a tightening bolt 62 having a nut 60 is inserted so as to be pivotally supported.
6 and has a tightening bolt 62 pivotally supported on the one gripping frame 56 at the open end of the other gripping frame 56 '.
Has a U-grooved flange portion 61 for detachably supporting.

When the state of use of the telephone pole holding fixture 50 is shown, the base 52 of the telephone pole holding fixture 50 is held by the gripper of one robot arm, and the holding frames 56, 56 '.
The release spring 58 of the above is pressed against the electric pole 68,
The other robot arm inserts the tightening bolt 62 of the one gripping frame 56 into the flange portion 61 of the other gripping frame 56 ', attaches the nut tightening tool to the tip of the other robot arm, and tightens the nut 60 to grip both grips. The frames 56 and 56 ′ are fixed to the electric pole 68.

[0004]

However, in the conventional utility pole gripping fixture, the function of gripping the utility pole and the function of securing the utility pole are separate, and therefore the robot has two functions to perform these operations. Since it requires an arm, the electric pole grip fixture cannot be fixed to the electric pole by using a one-arm robot, and it takes a lot of time to grip and fix the electric pole, resulting in low productivity.

An object of the present invention is to provide a utility pole gripping fixture which avoids the above-mentioned drawbacks and allows a one-armed robot to securely grip and fix the utility pole and work in a short time. .

[0006]

In order to solve the above problems, the present invention provides a pair of gripping frames having curved portions for gripping a utility pole, and a screw rod through which the pair of gripping frames penetrate. , A pair of pivot arms that are pivotally supported on one of the gripping frames and that have a threaded portion that engages with a screw rod at the tip and that are openably and closably combined with each other, and a threaded portion of the pair of pivotal arms. And a gripping frame opening / closing means including a spring for urging the screw rod to close, and a return spring attached to the screw rod on the other gripping frame side via a one-way drive unit so as to return the screw rod in a direction opposite to the rotational direction. When the screw rod drive means including a spring-biased swing lever and the screw portions of the pair of pivot arms of the grip frame opening / closing means are released from the screw rod, one gripping frame is separated from the other gripping frame. So And to provide a utility pole gripping fixture is characterized in that a grip frame opening spring means for biasing.

[0007]

In this way, by simply swinging the swing lever of the screw rod driving means in the direction of rotation of the screw rod, one of the gripping frames is connected to the other through the screw portions of the pair of pivotal arms of the gripping frame opening / closing means. Since it moves so as to approach the gripping frame of the electric pole, even a one-armed robot can surely grip and fix the utility pole gripping fixture to the electric wire, and the work of gripping and fixing the utility pole gripping fixture can be performed in a short time. You can

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring now to the drawings, an embodiment of the present invention will be described in detail with reference to FIGS.
The utility pole gripping fixture 10 includes a pair of gripping frames 14, 14 ′ having curved portions 14 a, 14 ′ a to grip the utility pole 12, and a pair of gripping frames 14, 14.
Left-handed threaded rod 16 through the through hole 14 '
It has and. These grip frames 14, 14 '
Has openings 14b, 14'b into which one of the grippers of the robot arm inserts (14b not shown in the drawing).

As shown in FIGS. 4 and 5, the gripping frame opening / closing means 18 has a pivot pin 2 on one gripping frame 14.
A pair of pivot arms 22, 22 'having left-threaded threaded portions 22a, 22'a that are pivotally mounted by 0 and engage with the threaded rod 16 at the tip, and a pair of these pivot arms A spring 24 for biasing the threaded portions 22a, 22'a of the blades 22, 22 'to close. Therefore, the pair of pivot arms 22, 22 'are connected to the threaded portion 22a,
22'a is normally meshed with the threaded rod 16 by a spring 24.

As shown in FIG. 6, the screw rod driving means 26 is attached to the screw rod 16 via the one-way drive unit 28 on the side of the other grip frame 14 ', and the direction of rotation of the screw rod 16 is controlled by the return spring 30. It includes a rocker lever 32 which is spring biased to return in the opposite direction. The one-way drive unit 28 can be a commercially available one-way clutch that is typically configured by providing a large number of inclined friction pawls at regular intervals in an annular gap between an inner ring and an outer ring. It may be a ratchet mechanism. When the swing lever 32 is swung in the direction of arrow A in FIG. 6 by a robot arm (not shown), the screw rod 16 is rotated in the same direction via the one-way drive unit 28, and the robot arm is released from the swing lever 32. The swinging lever 32 is swung in the direction of the arrow A ′ in FIG. 6 by the return spring 30, but at this time, the one-way drive unit 28 does not transmit the rotation of the swinging lever 32 to the screw rod 16, so that the screw rod 16 is reversed. It does not rotate in any direction.
In FIG. 6, reference numeral 34 is a nut attached to the screw rod 16 via a washer 36 to prevent the swing lever 32 from coming off the screw rod 16.

The gripping frame opening spring means 38 is provided with one gripping frame 14 when the screw portions 22a, 22'a of the pair of pivot arms 22, 22 'of the gripping frame opening / closing means 18 are released from the screw rod 16. The other gripping frame 1
It consists of a coil spring 40 which is arranged between the two gripping frames 14, 14 'so as to be separated from 4'. When the pair of pivot arms 22, 22 'of the gripping frame opening / closing means 18 are opened against the spring 24, the screw portions 22a, 22'a.
Is released from the screw rod 16, so that the gripping frame 14 is separated from the screw rod 16, and therefore the coil spring 36 is expanded and released so as to separate the gripping frame 14 from the gripping frame 14 ′. The fixture 10 is removed from the utility pole 12. 1 and 2, reference numeral 42 is a stopper nut attached to the screw rod 16 to regulate the open position of the grip frame 14.

Next, the operation of attaching and detaching the utility pole gripping fixture 10 of the present invention will be described. As shown in FIG. 2, the utility pole gripping fixture 10 is fitted into the utility pole 12 in the open state as shown by the dotted line in FIG. One gripper piece 44 of the gripper of the robot arm
A is gripping frame 14, 14 'openings 14b, 14'b
Then, the other gripper piece 44B is applied to the lower side of the swing lever 32 of the screw rod driving means 26.

Thereafter, the robot arm moves the gripper piece 44.
Repeatedly open and close A and 44B. Gripper pieces 44A, 4
When 4B is closed, the swing lever 32 swings in the direction of arrow A in FIG. 6, so that the screw rod 16 is rotated counterclockwise in FIG. 6 via the one-way drive unit 28. Grip piece 44
When A and 44B are opened, the swing lever 32 swings in the direction of arrow A'in FIG. 6 by the action of the return spring 30, but this swing is not transmitted to the screw rod 16 by the one-way drive unit 28. In this way, the screw rod 16 is sequentially rotated counterclockwise in FIG. 6 by repeatedly opening and closing the gripper of the robot arm.

On the other hand, the pair of pivotal arms 22, 22 'meshing with the screw rod 16 by the rotation of the screw rod 16 together with the grip frame 14 have a coil spring 40 for each screw pitch.
Against the gripping arm 14 '. In this way, the gripping frame 14 finally collides with the utility pole 12,
Since the electric pole 12 is sandwiched between the two holding frames 14 and 14 ', the electric pole holding fixture 10 is fixed. 1 and 2, reference numeral 46 is a pole machine or tool attached to the rear ends of the pair of grip frames 14 and 14 '.

Next, the utility pole gripping fixture 10 is attached to the utility pole 12
To remove it from the robot arm gripper, a pair of pivot arms 22, 2 of the gripping frame opening / closing means 18 is removed.
Open 2'as shown by the phantom line in FIG. When the pair of pivot arms 22, 22 'are opened, their threaded portions 22a, 22'a
Is released from the screw rod 16, the coil spring 40 opens the gripping frame 14 until it abuts the stopper nut 42. Therefore, the utility pole gripping fixture 10 can be removed from the utility pole 12.

In the above embodiment, one gripper piece 44A of the gripper of the robot arm is the gripping frame 1.
The openings 14b, 14'b may be omitted if they are inserted into the openings 14b, 14'b of 4, 14 'but can be engaged with the upper edge of the gripper frame 44A of the gripper frame 14, 14'.

2 and 6, the swing lever 32 is shown mounted diagonally downward, but it may be mounted diagonally downward left. In this case, since the screw rod 16 rotates clockwise in FIGS. 2 and 6 by the opening / closing operation of the gripper stitches 44A, 44B, the screw rod 16 can be replaced with a right-hand threaded one to hold one of the gripping frames 14 Approaches the other gripping frame 14 ',
The utility pole grip fixture 10 can be firmly fixed to the utility pole.

[0018]

According to the present invention, as described above, by simply swinging the swing lever of the screw rod driving means in one direction, the screw can be passed through the screw portions of the pair of pivot arms of the gripping frame opening / closing means. Since one gripping frame can be moved so as to approach the other gripping frame, even a one-armed robot can reliably grip and fix the utility pole gripping fixture to the utility pole, thus gripping and fixing the utility pole gripping fixture. Can be done in a short time.

[Brief description of drawings]

FIG. 1 is a plan view of a telephone pole holding fixture according to the present invention.

FIG. 2 is a front view of a telephone pole holding fixture according to the present invention.

3 is a sectional view taken along line 3-3 of FIG.

FIG. 4 is an enlarged front view of the gripping frame opening / closing means used in the present invention.

5 is a sectional view taken along line 5-5 of FIG.

FIG. 6 is an exploded perspective view of a screw rod driving means used in the present invention.

FIG. 7 is a front view of a conventional utility pole grip fixture.

FIG. 8 is a side view of a conventional utility pole grip fixture.

FIG. 9 is a bottom view of a conventional utility pole gripping fixture.

[Explanation of symbols]

 10 utility pole gripping fixture 12 utility pole 14 gripping frame 14a curved part 14 'gripping frame 14'a curved part 16 screw rod 18 gripping frame opening / closing means 20 pivot pin 22 pivotal support arm 22a screw part 22' pivotal arm 22'a screw Part 24 Spring 26 Screw rod driving means 28 One-way driving unit 30 Return spring 32 Swing arm 34 Nut 38 Grip frame opening spring means 40 Coil spring 42 Stopper nut 44A Gripper piece 44B Gripper piece

Claims (1)

[Claims] 1. A pair of gripping frames having curved portions for gripping an electric pole, a screw rod through which the pair of gripping frames penetrate, and a screw rod pivotally mounted on one of the gripping frames and attached to the tip thereof. Gripping frame opening and closing means including a pair of pivotal arms having screw parts that engage with each other and being openably and closably combined with each other, and a spring for biasing the screw parts of the pair of pivotal arms to close. Screw rod driving means including a swing lever attached to the screw rod via a one-way drive unit on the side of the grip frame and biased by a return spring to return in a direction opposite to the rotation direction of the screw rod, Gripping frame opening spring means for urging the one gripping frame to separate from the other gripping frame when the threaded portions of the pair of pivot arms of the gripping frame opening / closing means are released from the screw rod. An electric pole gripping fixture characterized by being provided.