JPH0743658Y2 - Clamping device for measurement - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a measuring clamp device for safely and surely measuring current, voltage, etc. on an electric line.

[0002]

2. Description of the Related Art A probe or a test rod having a metal crocodile or a metal needle at its tip is used for measuring the current or voltage of an electric line. When using this probe or test rod, the crocodile part is pinched in the electric line and the metal needle is brought into contact. In addition, a crocodile attachment may be attached to the tip of a test rod having a metal needle at the tip, and the attachment may be clamped in an electric line to measure current or voltage.

[0003]

However, when the above-mentioned conventional test rod or probe is used, the hand holding the test rod may slip at the time of measurement, and there is a risk that the finger or arm may come into contact with the electric line. is there. Also, when measuring the voltage and current of the electric line by attaching the crocodile attachment to the tip of the test rod, bring your fingertip close to the tip of the test rod to pinch the crocodile attachment to the electric line, and attach the attachment. Since it has to be opened and closed, it is dangerous especially when high-voltage current is flowing in the electric line. Therefore, there is a demand for a measuring device capable of opening and closing the crocodile mouth even if a finger or an arm does not approach the electric line at the time of measurement, and capable of measuring current, voltage and the like safely and reliably.

[0004]

SUMMARY OF THE INVENTION The present invention has been proposed in order to solve the above-mentioned conventional drawbacks and to meet the demands of the prior art. The present invention has a metal needle at the tip and is provided at the rear of the tip. It has a test rod having a collar portion and an crocodile attachment detachably attached to the tip end portion of the above-mentioned test rod, and the above-mentioned attachment is attached to the first leg piece and the above-mentioned first leg piece. It consists of a second leg that can tilt with respect to
The tip end portions of the first leg piece and the second leg piece are clamp portions for sandwiching the electric line, and the attachment / detachment of the test rod is attached to the opening / closing operation portion extending rearward from the second leg piece. It is located above the collar portion of the test rod in the state of being attached to the tip portion, and the lower surface of the lower surface where the collar portion of the test rod is fitted from below in the state in which the opening / closing operation portion is pressed to open the clamp portion. The present invention relates to a clamp device for measurement, which is characterized in that an empty portion is formed.

[0005]

In the state where the attachment is attached to the tip end of the test rod, the opening / closing operation portion extending rearward from the second leg piece is located rearward of the collar portion of the test rod. The fingers and arms do not reach the tip of the test rod even when the attachment is opened or closed by moving it away.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be specifically described below with reference to the drawings. The measuring clamp device 1 of the present invention comprises a test rod 2 and an attachment 3 which is detachably attached to the tip of the test rod 2.

The above-mentioned test rod 2 has a structure in which a metal needle 23 is provided on the tip 22 of a cylindrical attachment body 21 and a collar 24 is formed behind the tip 22.

The above-mentioned attachment 3 is crocodile-shaped and has a fixed first leg piece 31 and a shaft 3 with respect to the first leg piece 31.
2 has a second leg piece 33 tiltably provided, and the tip portions of the first leg piece 31 and the second leg piece 33 described above have a clamp portion 34 that holds the electric line a to be measured. The clamp portion 34 is elastically closed by a spring material 35. Then, the first metal piece 36 is provided in the longitudinal direction on the inner surface of the first leg piece 31 described above, and
At the rear end of the first leg piece 31, a storage space 37 for mounting the tip end portion 22 of the test rod 2 is formed.

The second leg piece 33 is provided with a second metal piece 38 on its inner surface and an opening / closing operation portion 39 at the rear end so as to extend rearward. Then, in the middle of the opening / closing operation section 39, an empty section 40 is formed so as to be located above the collar section 24 in a state where the attachment 3 is attached to the tip section 22 of the test rod 2. The above-mentioned empty portion 40 has an upward U-shape with an open bottom surface, and the attachment body 2
It is possible to receive the collar portion 24 protruding from the outer surface of 1.

The measuring clamp device 1 of the present invention comprises the test rod 2 and the attachment 3 having the above-mentioned constitutions, and when measuring the current or voltage flowing through the electric line a, the tip portion 22 is used.
Is inserted into the storage space 37 and the attachment 3 is attached to the test rod 2. In this state, the metal needle 23 comes into contact with the first metal piece 36 so that the test rod 2 and the attachment 3 are electrically connected to each other, and the clamp portion 34 has the spring member 35.
And the opening / closing operation portion 39 extends rearward, and the collar portion 2
An empty space 40 is located above 4 (FIG. 2). Therefore,
When the attachment main body 21 is gripped by hand and the opening / closing operation portion 39 of the attachment 3 located behind the collar portion 24 is pressed downward, the shaft 32 tilts with the second leg piece 33 as a fulcrum and the clamp portion 34 is opened. However, the upper portion of the collar portion 24 is the empty portion 40.
Accepted inside (Fig. 3). Therefore, since the clamp portion 34 is largely opened, the electric line a can be sandwiched, and the current or voltage value flowing through the electric line a can be measured.

When the measurement of the electric line a is completed, there is a margin between the collar portion 24 and the empty portion 40. Therefore, the opening / closing operation portion 39 is pressed by the margin, the clamp portion 34 is opened, and the attachment 3 is connected to the electric wire. It can be removed from the road a. Therefore, at the time of measurement on the electric line a, the arm or finger should be placed on the collar 24 of the test rod 2.
Since it is not necessary to position it on the front side, there is no danger of contacting the electric line a.

The present invention has been described above based on the embodiments of the drawings. However, the present invention is not limited to the above-mentioned embodiments, and the present invention is not limited to the embodiments described below. But it can be done.

[0013]

EFFECTS OF THE INVENTION In summary, according to the present invention, a test rod having a metal needle at its tip and a collar formed behind the tip, and a crocodile detachably attached to the tip of the test rod described above. And a second leg that is tiltable with respect to the first leg, the first leg and the second leg. The tip part with the leg piece is a clamp part for sandwiching the electric line, and
The opening / closing operation section extending rearward from the leg piece is located above the collar portion of the test rod in a state where the attachment is attached to the tip end of the test rod, and the opening / closing operation section is pressed to clamp the clamp. It is characterized in that the collar portion of the test rod is formed with an open bottom portion into which the collar portion is fitted from below in a state where the portion is opened. Therefore, even if there is a collar on the test rod, not only can the attachment be easily attached and detached, but when measuring on the electric line, place your hands or fingers in front of the test rod and use the collar. Since the clamp part can be opened and closed by pressing the stop and open / close operation part, there is no accident of electric shock even if high voltage current is flowing in the electric line, and even if the hand slips, the collar part of the test rod Since it is held at, the hands and arms do not approach the electric line. In addition, the empty portion of the opening / closing operation portion is located above the collar portion of the test rod in a state where the attachment is attached to the tip end portion of the test rod, and the clamp portion is opened by pressing the opening / closing operation portion. In the configuration, the collar portion of the test rod is fitted from below. Therefore, when attaching or detaching the attachment to or from the test rod, it is extremely simple because the attachment simply needs to be inserted into or removed from the tip of the test rod, and no special operation is required for measurement. It is possible to provide a measuring clamp device having a high biological value.

[Brief description of drawings]

FIG. 1 is a side view in which a test rod and an attachment are separated and the attachment is a vertical cross section.

FIG. 2 is a side view in which the attachment is attached to a test rod, and the attachment has a vertical section.

FIG. 3 is a side view of a measurement state.

[Explanation of symbols]

 1 Measuring Clamp Device 2 Test Rod 3 Attachment 21 Attachment Main Body 22 Tip Part 23 Metal Needle 24 Collar Part 31 First Leg Piece 32 Shaft 33 Second Leg Piece 34 Clamping Part 35 Spring Material 36 First Metal Piece 37 Empty part 38 Second metal piece 39 Opening / closing operation part 40 Empty part

Claims (1)

[Scope of utility model registration request] 1. A test rod having a metal needle at its tip and a collar formed at the rear of said tip, and a crocodile attachment detachably attached to the tip of said test rod. , The attachment is a first leg piece, and the first
The second leg that can be tilted with respect to the leg of the
The tip portions of the leg piece and the second leg piece are clamp portions for sandwiching the electric line, and the attachment / detachment is attached to the tip portion of the test rod in the opening / closing operation portion extending rearward from the second leg piece. Is located above the collar portion of the test rod in the state of being attached to the test rod, and the lower portion of the open space into which the collar portion of the test rod is fitted from below when the clamp portion is opened by pressing the opening / closing operation portion. A clamp device for measurement, characterized in that