JPH0539671Y2 - - Google Patents

Description

[Detailed description of the invention] [Summary] Regarding the installation tool for cut cores used for radio wave countermeasures, the purpose is to make it possible to easily wind the cable with one hand and to accurately measure changes in radiated radio waves. , a trigger provided in the middle part of this body part so as to be movable back and forth, a grip part provided at the base end part of the body part, and a trigger part provided at the tip part of the body part and divided into two parts through a hole. A piece of the cut core, a protrusion protruding from both sides of the cut core, and a cut core that is supported by the tip of the body and that moves away from and approaches the piece of the cut core in conjunction with the movement of the trigger. Consists of other pieces.

[Industrial application field]

The present invention relates to a cutting core installation tool used for radio wave countermeasures.

There is a growing possibility that electromagnetic waves leak from electronic devices and unintentionally confuse external precision electronic devices. For this reason, starting in 1985, the industry began to impose voluntary regulations on radio interference. In electronic devices, various signals travel through cables at high speed, so cables act as antennas and emit radio waves. A ferrite cut core split in half was attached to such a cable, and the position where the radiated radio waves were minimized was investigated.

Normally, the effect of reducing radio wave radiation can be obtained simply by passing the stretched cable through the hole in the cut core. However, if the reduction effect is not as expected, the cable is wound around once or more to form a loop, and a cut core is installed at the position where the cable doubles to find the position where the radiated radio waves are minimized. .

Under these circumstances, there was a need for a tool that could easily make cable loops with one hand.

[Conventional technology]

FIG. 4 is a diagram showing a conventional method of attaching a cut core.

As shown in the figure, the cable 1 was wound once to form a loop, and the doubled portion was sandwiched between the holes 4 of the cut cores 2 and 3. Then, the cut cores 2 and 3 were moved to check the position where the pointer 6 of the electric field strength meter 5 placed at a distant position showed the minimum value.
In this case, the cable 1 was wound once with the right hand 7, and the cut cores 2 and 3 were lifted and attached with the left hand.

[The problem that the idea attempts to solve]

Radio waves are affected by the dielectric constant of the space in which they propagate, causing reflection and refraction. Therefore, cut core 2 by hand,
In the conventional method of gripping and attaching cable 3 to cable 1, the dielectric constant of the space changes depending on the human body. As a result, the intensity of the radiated radio waves changes, and the cut core 2,
It was not possible to accurately measure the change in radiated radio waves depending on the mounting position of item 3.

Another problem was that the work efficiency was low considering that both hands were used.

The present invention was devised to solve the above-mentioned problems, and aims to provide a cut core installation tool that allows cables to be easily wound in with one hand and allows accurate measurement of changes in radiated radio waves.

[Means to solve the problem]

As shown in FIGS. 1 and 2, in the present invention, a grip portion 10 is provided at the base end of the body portion 11, and a cut core 13 is provided at the distal end. Cut core 13 into hole 1
Divide into two pieces, one piece A and the other piece B, through 6.
is fixed to the body part 11. Locking protrusions 14 and 15 are formed on both sides of this piece A, respectively. The other piece B of the cut core 13 is connected to a trigger 12 provided in the middle part of the body part 11. By moving trigger 12, the other piece B
The pieces A are spaced apart from each other so that the cable can be trapped within the hole 16.

[Effect]

Pull the trigger 12 with the finger of one hand and cut the core 13.
The other piece B is separated from one piece A so that the hole 16 is divided. The installation tool is locked to the target cable by the protrusion 14. Next, connect the cables to one side A and B.
It is taken into the hole 16 through the gap, and the trigger 12 is returned to its original position. The cable is now inserted into the hole 16. Next, the cable is locked to the other protrusion 15. Next, place the first protrusion 14 on the same side,
When the cable is locked, the cable will cut into the cut core 1.
It is wound around 3. When the trigger 12 is then pulled, the double wound cable is pinched into the hole 16. Therefore, the cut core 13 grips the once-wound ring, and the radiated radio waves can be measured accurately.

〔Example〕

Hereinafter, the present invention will be explained based on the drawings.

In FIGS. 1 and 2, a gun type installation tool includes a grip part 10, a long rod-shaped body part 11, a trigger part 12, a cut core part 13, and a relatively large protrusion 14.
and a relatively small protrusion 15.

The cut core 13 is provided at the tip of the body portion 11, and the cut core 13 is divided into two pieces, one piece A and the other piece B. The cut core 13 has a hole 16 passing through the center thereof, and one piece A and the other piece B are divided into two parts through the hole 16 in order to sandwich a cable, which will be described later, in the hole 16. cut core 13
Since one piece A and the other piece B function as one, one piece A is fixed to the tip of the body part 11, and the other piece B is supported by the body 11 so as to be able to approach and separate from one piece A. . A relatively large projection 14 is provided on one end surface of one piece A of the cut core 13, and a slightly smaller projection 15 is provided on the other end surface. The large protrusion 14 is one piece A of the cut core 13 and the other piece B
is provided on the opening side, and is placed on the side opposite to the trigger 12.

In FIG. 2, a support plate 17 is provided upright in the middle part of the body part 11, and the support plate 17 has through holes 1.
8 is formed. Another support plate 19 is provided upright at the base end of the grip portion 10, and a through hole 20 is formed in the support plate 19. The through hole 18 and the through hole 20 are coaxial and have approximately the same diameter, and a shaft 21 is slidably inserted into these, so the support plates 17 and 19 serve as bearings for the shaft 21. .

The smaller B piece of the cut core 13 is fixed to the tip of this shaft 21, and the trigger 12 is connected to the shaft 21.
It is provided near the proximal end of the. A long groove 22 is formed at the lower end of the body part 11, and the trigger 12 projects outward from the body part 11 from this long groove 22. A cover 23 is attached to the body portion 11 so as to cover the support plates 17, 19 and the shaft 21. A coil spring 25 is interposed between the trigger 12 and the rear support plate 19, and normally the trigger 12 and the shaft 21
is urged forward, and the cut core 13 is in a state where one piece A and the other piece B are integrated.

Next, the operation will be explained according to FIGS. 3(A) to 3(C). First, the grip part 1 of the installation tool of the present invention
1 with one hand and lock it to the target cable 1 using the large protrusion 14. In the same figure (A), the index finger is placed on the trigger 12. Then, the trigger 12 is pulled to separate the cut core 13 into one piece A and the other piece B. In this state, move the installation tool in the direction of the arrow. Then, the cable 1 is taken into the hole 16 between the A piece and the B piece. Cable 1 is hole 16
When the trigger 12 is released, the B piece is moved by the force of the coil spring 25 and comes into contact with the A piece, resulting in the state shown in the figure (A). Next, lift the entire installation tool in the direction of the arrow and lock the smaller protrusion 15 on the a side of the cable 1 to bring it into the state shown in the figure (c). Next, from this state, lift the installation tool in the direction of the arrow and lock the a side of the cable 1 to the larger protrusion 14, resulting in the state shown in Figure (e). In this state, the cable 1 is wound around the outside of the cut core 13 once. Then, when the trigger 12 is pulled again as shown in the figure (E), pieces A and B will separate. Then, the a side of the cable 1 passes through the gap between the A piece and the B piece, and both the a side and the b side of the cable 1 are sandwiched between the holes 16, as shown in FIG. Finally trigger 1
2, the A piece and B piece of the cut core 13 come into contact with each other, and the cable 1 forms one loop as shown in FIG. In this state, when measuring the electric field strength due to the radiated radio waves, the hand and the ring of cable 1 are far apart, so
Accurate measurements can be made without being affected by the human body. The operations (a) to (k) in FIG. 3 described above can be easily performed with one hand. Furthermore, in the case of two or more windings, by repeating the operation from the state shown in the above figure (a) to the state shown in figure (c), the winding can be easily performed any number of times.

[Effect of idea]

As explained above, according to the present invention, the cut core is divided into two parts and one side is placed close to the other, making it easy to wrap the cable in with one hand, and also to prevent changes in radiated radio waves from occurring in the human body. It has become possible to eliminate this influence and measure accurately.

[Brief explanation of drawings]

FIG. 1 is a front view of the present invention, FIG. 2 is a perspective view of the present invention, FIG. 3 is a diagram showing the operation of the present invention, and FIG. 4 is a diagram showing a conventional method. In the figure, 1 is a cable, 10 is a grip part, 1
1 is the body part, 12 is the trigger, 13 is the cut core, 1
4 and 15 are projections, 16 are holes, 17 and 19 are bearings,
18, 20 are through holes, 21 is a shaft, 22 is a long groove, 2
3 is a cover, 25 is a coil spring, and A and B are pieces.

Claims (1)

[Scope of utility model registration request] A rod-shaped body part 11, a trigger 12 provided in an intermediate part of the body part 11 so as to be movable back and forth, and the body part 1.
A grip part 10 provided at the base end of the body part 11, a piece A of the cut core 13 provided at the distal end part of the body part 11 and divided into two parts through the hole 16, and a piece A of the cut core 13 provided protruding from both sides of the cut core 13, respectively. protrusion 1
4, 15, and the other piece B of the cut core 13, which is supported by the tip of the body part 11 and moves away from and approaches the piece A of the cut core 13 in conjunction with the movement of the trigger 12. Installation tools.