JPH073767Y2 - Magnet type magnetic material detector - Google Patents

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial field of application) The present invention relates to, for example, an anchor clamp for connecting steel core aluminum stranded wires of a transmission line, a jumper socket, or the like, which is brought into proximity with or in contact with a clamp, The present invention relates to a magnet type magnetic substance detector that detects whether or not a steel core is inserted into a socket to a predetermined position.

(Prior art) The steel core aluminum stranded wire of the power transmission line installed between the steel towers is compression-connected by the retention clamp, jumper socket, etc. It is necessary to confirm whether or not there is. However, since the detention clamp and the jumper socket are made of aluminum, they cannot be visually inspected from the outside, and conventionally, they were magnetically detected using a magnetic steel core detector before being attached to the detention clamp.

By the way, the conventional magnet type steel core detector is configured as shown in FIGS. 6 and 7. That is, 1 is a case of a non-magnetic material, which is composed of a base 2 and a cover 3. A supporting member 4 is erected at a substantially central portion of the base 2, and a rotating member 6 is rotatably supported on the supporting member 4 by a pivot shaft 5. A magnet 7 is fixed to one end of the rotating member 6, and a spring 8 is provided to the other end. Then, the magnet 7 is the detection unit 2a of the base 2.
The magnet 7 is attracted to rotate the rotating member 6 when the detecting portion 2a is brought close to or in contact with the magnetic body. In addition, the spring 8 has a cover 3
The upper end abuts on the adjusting screw 9 screwed into the upper part of the shaft and the other end abuts on the rotating member 6, so that the rotating resistance of the rotating member 6 can be adjusted by the elastic force of the spring 8. . Further, an operation display plate (not shown) protruding to the outside of the case 1 is provided at the base end of the rotating member 6 so as to display the rotating state of the rotating member 6.

Transmission lines are generally connected as shown in FIG. That is, the steel tower 14 is provided with a strain clamp 16 via the insulator 15, and a jumper socket 17 is connected to the strain clamp 16. Then, the steel core 19 of the steel core aluminum stranded wire 18 is inserted and connected to the detention clamp 16 and the jumper socket 17.

Therefore, when the detecting portion 2a of the magnet type steel core detector 10 is brought into contact with the detention clamp 16 and the jumper clamp 17, when the steel core 19 inserted in the steel core aluminum stranded wire 18 is detected, the magnet 7 is Attracted to the heart 19 side. Therefore, the rotating member 6 rotates about the pivot shaft 5 as a fulcrum to reach the state shown in FIG. 7, and the operation display plate rotates to confirm the steel core 19. In this state, when the magnet type steel core detector 10 is slid in the lateral direction of the detention clamp 16 and the jumper socket 17 and is disengaged from the end of the steel core 19, the attraction force of the magnet 7 is lost and the rotating member 6 is It is rotated by the spring 8 to return to the state shown in FIG. Therefore, the magnetic steel core detector 10 is attached to the strain clamp 1
6. By sliding the jumper socket 17 in the lateral direction, the insertion depth of the steel core 19 can be confirmed.

(Problems to be solved by the invention) However, the magnet type steel core detector 10 configured as described above is used.
Is a lever type structure in which the magnet 7 attached to one end of the rotating member 6 and the spring 8 at the other end are balanced, so when the magnet type steel core detector 10 is used in a horizontal state However, in many cases, the magnet type steel core detector 10 is used in a vertical state or in a back state. It exceeds the elastic force of the spring 8. Therefore,
Even if the steel core 19 is present when the magnetic steel core detector 10 is brought close to the detention clamp 16 and the jumper socket 17, the magnet 7
There is a problem that it does not work because its suction power is weak.

The present invention was made in view of the above circumstances, and its purpose is to put a magnet type magnetic substance detector in a horizontal state,
It is an object of the present invention to provide a magnet type magnetic substance detector which can always detect accurately without the attraction force of the magnet changing even when used in a vertical state or a backside state.

[Means for Solving the Problems] (Means and Actions for Solving the Problems) In order to achieve the above-mentioned object, the present invention is directed to a case and a magnet on one end side that is rotatably supported by a pivoting portion inside the case. A balance rotation member provided with a weight on the other end side, a switch provided inside the case and turned on / off by detecting a rotation amount of the rotation member, and a display means. is there.

When a magnet is detected in the vicinity of or in contact with a non-magnetic body that is a member to be detected, such as a jumper socket, when a magnetic body inside the non-magnetic body, such as a steel core, is detected, the magnet is attracted and the rotating member rotates. The switch is turned on, the indicator lamp is turned on, and the display means such as a buzzer sound is operated to confirm the presence of the magnetic material.

(Embodiment) An embodiment of the present invention will be described below with reference to the drawings.

In FIGS. 1 and 2, reference numeral 21 denotes a case made of a non-magnetic material, which is composed of a rectangular base 22 and a cover 23. The top side of the base 22 has a detector on the tip side.
Plate 25 is polymerized, leaving 24
A support member 26 is erected on the upper surface on the tip side of the. A pivot 28 is laterally installed on the support member 26.
An intermediate portion in the longitudinal direction of the rotating member 29 is rotatably supported by the. The rotating member 29 includes a piece 30 pivotally supported by the pivot shaft 28, a front shaft 31 protruding forward from below one end of the piece 30, and a rear shaft protruding rearward from above the other end of the piece 30. It is formed from 32 and. The magnet housed in the magnet case 33 is attached to the tip of the front shaft 31.
34 is fixed, and a magnet case is attached to the tip of the rear shaft 32.
A weight 35 having substantially the same weight as the weight of the magnet 34 including 33 is fixed. Therefore, the weight of the rotating member 29 is kept balanced, and the magnet 34 faces the detector 24.

Further, a spring receiver 37 and a switch operating lever 38 are provided on the piece 30 of the rotating member 29 so as to project therefrom. The spring receiver 37 is provided with a sensitivity adjusting spring mechanism 39. The sensitivity adjusting spring mechanism 39 is constructed as shown in FIGS. That is, 40 is a support plate standing on the plate 25, and a nut member 42 into which a screw rod 41 is screwed is provided on the support plate 40. A coil spring 44 is interposed between the collar portion 43 provided at the lower end of the screw rod 41 and the spring receiving body 37. An adjusting knob 45 protruding above the cover 23 is provided at the upper end of the screw rod 41, and by rotating the adjusting knob 45, the screw rod 41 can be advanced and retracted, and the elastic force of the coil spring 44 can be adjusted. It is like this. Further, the plate 25 facing the switch operating lever 38 has a switch
46 is provided, and can be turned on / off by a switch operating lever 38 that rotates with the rotation of the rotating member 29.

A supporting frame 47 is erected on the plate 25 located near the weight 35, and a screw rod 48 is provided above the supporting frame 47.
A nut member 49 into which is screwed is provided. The lower end surface of the screw rod 48 faces the weight 35, and the operation knob 50 projecting above the cover 23 is provided at the upper end portion of the screw rod 48. Then, by rotating the adjusting knob 50, the screw rod 48 can be moved forward and backward, and when not in use, the weight 35 is pressed downward by the screw rod 48, and the rotating member 29 can be held unrotatable.

Further, a battery 51 is provided at a rear end portion of the case 21, a buzzer 52 and a display portion 53 such as an LED as a display unit are provided at an upper portion thereof, and the display portion 53 protrudes above the cover 23. .

Next, the operation of the magnet type magnetic substance detector configured as described above will be described. Operating knob 50 for weight holding member 36
When the screw rod 48 is retracted upward by operating, the rotating member 29 is rotatable about the pivot 28 as a fulcrum. However, since the spring receiver 37 is pressed downward by the biasing force of the sensitivity adjusting spring mechanism 39, the rotating member 29 is in a state in which the magnet 34 is pushed up as shown in FIG.

When the insertion state of the steel core 19 is checked by approaching the detention clamp 16 and the jumper socket 17 with this magnet type magnetic substance detector, when the power transmission line is energized, as shown in FIG. The detector is attached to the tip of the insulating rod 11 by the mounting bracket 12, and the operator 13 climbs up to the tower 14 to detect the magnet type magnetic substance detector.
Check the inserted state of the steel core 19 by bringing it close to the jumper socket 17. That is, the detecting portion 24 of the case 21 is brought into contact with the jumper socket 17 as shown in FIG. At this time,
When the steel core 19 inserted in the steel core aluminum stranded wire 18 is detected,
The magnet 34 is attracted to the steel core 19 side. Therefore, the rotating member 29 rotates against the biasing force of the coil spring 44,
In the state shown in FIG. 3, the switch operating lever 38 turns on the switch 46. When the switch 46 turns on, the buzzer
The display unit 53 lights up as the 52 operates. That is,
The operator is informed that the steel core 19 inserted in the steel core aluminum stranded wire 18 has been detected. In this state, when the magnet type magnetic substance detector is slid in the vertical direction of the jumper socket 17 and the center of the detecting portion 24 deviates from the end of the steel core 19, the attraction force of the magnet 34 disappears and the rotating member 29 becomes The coil spring 44 rotates to return to the state shown in FIG. And switch 46
Turns off, the buzzer 52 stops, and the display 53
Turns off. That is, the operator is informed of the end of the steel core 19 inserted in the steel core aluminum stranded wire 18. Therefore, attach the magnet type magnetic substance detector to the detention clamp 16 or jumper socket 17.
It is possible to confirm the insertion depth of the steel core 19 by sliding the steel core 19 in the left / right and up / down directions.

In addition, since the distance between the outer layer of the steel core 19 and the outer layer of the steel core aluminum stranded wire 18 is different depending on the wire size, the steel core 19 inserted in the steel core aluminum stranded wire 18 has a distance between the detection unit 24 and the steel core 19. Depending on whether it is large or small, the sensitivity adjusting spring mechanism 39 can adjust the detection sensitivity. That is,
When the distance between the steel core 19 inserted in the steel-core aluminum stranded wire 18 and the detecting portion 24 is large, as shown in FIG.
By rotating clockwise, the screw rod 41 is retracted, the elastic force of the coil spring 44 is weakened, and it is adjusted when the distance between the steel core 19 inserted in the steel core aluminum stranded wire 18 and the detection part 24 is small. By turning the knob 45 counterclockwise, the screw rod 41 is advanced and the coil spring
The elastic force of 44 can be increased. Moreover, in any state, since the rotating member 29 maintains the weight balance between the magnet 34 and the weight 35, even if the magnet type magnetic substance detector is used in a horizontal state, a vertical state or a rear state,
The suction force of 34 does not change and can always be detected accurately.

In the above embodiment, the case of detecting the steel core 19 inserted in the steel core aluminum stranded wire 18 of the transmission line has been described, but in the case of detecting a pipe embedded in a concrete wall, a reinforcing bar, etc. Also, it is possible to detect magnetically by bringing the magnet type magnetic substance detector close to or in contact with the concrete wall.

[Effect of the Invention] As described above, according to the present invention, a balance is provided by providing a magnet on one end side and a weight on the other end side of a rotating member that is rotatably supported by a pivot portion inside a case. Therefore, even if the magnet type magnetic substance detector is used in a horizontal state, a vertical state or a back side state, the attractive force of the magnet does not change, and it is possible to always accurately detect. Moreover, when the magnet type magnetic substance detector detects a magnetic substance, the switch is turned on to display, so that it is easy to confirm even if the worker is away, and workability can be improved. effective.

[Brief description of drawings]

1 to 5 show an embodiment of the present invention. FIG. 1 is a cross-sectional plan view of a magnet type magnetic substance detector, FIG. 2 is a longitudinal side view of the same, and FIG. FIG. 4 and FIG. 5 are side views of a sensitivity adjusting spring mechanism, and FIG. 6 is a side view of a conventional magnet type steel core detector.
FIG. 7 is a vertical cross-sectional side view for explaining the same action, FIG. 8 is a usage state diagram of a conventional magnet type steel core detector, and FIG. 9 is a side view of a connection state of a steel core aluminum twisted wire of a transmission line. Is. 21 …… Case, 24 …… Detection part, 29 …… Rotating member, 34 ……
Magnet, 35 …… weight, 46 …… switch, 52 …… buzzer, 53 …… display section.

Claims (1)

[Scope of utility model registration request] 1. A magnet type magnetic substance detector for detecting the presence or absence of a magnetic substance by covering the periphery of a magnetic substance with a non-magnetic substance and approaching or contacting an object whose presence or absence of the magnetic substance is invisible from the outside. A case, a rotating member that is rotatably supported by a pivotally supporting portion inside the case, is provided with a magnet at one end side, and a weight is provided at the other end side, and is balanced, and the rotating member is provided inside the case. A magnet-type magnetic material detector comprising a switch that is turned on / off by detecting the amount of rotation of a member, and display means that displays the on / off state of the switch.