JP3392963B2 - Voltage measurement tool - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a voltage measuring tool for an object to be measured having positive and negative terminals such as a storage battery.

[0002]

2. Description of the Related Art Conventionally, a measuring tool A as shown in FIG. 8 has been used to measure the voltage between the positive and negative terminals of other electric equipment such as a storage battery as an object to be measured. That is, the measuring tool A is composed of a pair of test rods A1 and A1, and the terminal portions of a pair of covered lead wires A2 and A2 leading out from the test rods A1 and A1 are connected to the positive and negative terminals of a voltmeter B, respectively. Hold the test rods A1 and A1 with both hands, and apply the contacts A3 and A3 protruding from the front ends of the test rods A1 and A1 to the positive and negative terminals of an object to be measured such as a storage battery. It is common to have Further, as an improved type of this type, one in which the pair of test rods can be operated with one hand is disclosed in Japanese Utility Model Publication No. 58-112966.

[0003]

However, in any of the above cases, since the voltage measuring tool is composed of a pair of test rods which are separated from each other, the voltage measuring tool depends on the distance between the positive and negative terminals of the object to be measured. It is troublesome for the operator to operate the pair of test rods with both hands, and when operating with one hand, one test rod must be operated with fingers. In some cases, it may be difficult to direct the object to be measured to the positive and negative terminals and the measurement may be inaccurate. Further, in particular, as shown in FIG. 9, when a large number of cubicle built-in storage batteries are measured, for example, the voltages of the storage batteries D, D, ... In that case, the pair of test rods A1 and A1 must be grasped with both hands or one hand, and the hand must be inserted all the way to the inner part of the box to make the measurement. If the height space is narrow, it becomes difficult to insert it, and the test rod A1,
The hand holding A1 is very close to the contactor, which is dangerous. In addition, there are inconveniences such as a limited hand insertion.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the inconvenience of operating each of the above-mentioned conventional pair of test rods, and the like, by simply holding one gripping rod with one hand, an object to be measured such as a battery. The present invention provides a measuring tool capable of easily measuring a voltage, in which a pair of coated lead wires to be connected to the positive and negative terminals of a voltmeter are inserted and housed in a single gripping cylinder, and the pair of insertion ends are housed. While connecting the parts to the bases of the pair of measuring coated lead wires, the bases of the pair of measuring coated lead wires are supported by the front ends of the gripping cylinders, and the desired lengths from the front end of the gripping cylinders to the front side. At the tip of the derived portion of the pair of measuring coated lead wires that have been derived, a pair of contacts is disposed at a distance substantially the same as the distance between the positive and negative terminals of the DUT , and further, The bundle
An elastic support member was fitted on the front end of the holding cylinder and provided on this.
The pair of insertion holes are parallel to the pair of measuring coated lead wires.
It is characterized in that a base part for performing is attached .

[0005]

In the voltage measuring instrument of the present invention, a pair of covered lead wires extending rearward are connected to the positive and negative terminals of the voltmeter, and
Grasp the grip tube of the one hand, it is possible to measure a positive, easily voltage that just applying to the negative terminal of the measured object such as a predetermined storage battery a pair of contacts of the tip, the pair
Applied when the contactor of is applied to the positive and negative terminals of the DUT.
The impact is absorbed by the elastic support member .

Further, according to the present invention, in the lead-out portion of the measuring coated lead wire, the lead wire is composed of a front lead wire and a rear lead wire, and these lead wires are riveted to form a shaft of the rivet. While rotatably connecting the circumference to the left and right, part of the synthetic resin tube that covers it is
Forming the bellows portion in the outer periphery covering portion of the connecting portion
By hand, by hand, each of the pair of lead-out parts ,
It can be rotated leftward or rightward and set so that the distance between the pair of contacts at the tip thereof matches the desired distance to be measured.

Further, according to the present invention, the pair of contacts are fitted to each other.
That the spacing fixing spacer, when to produce a plurality prepared having people each a pair of fitting holes having different intervals in accordance with the respective different predetermined spacing between the pair of contacts, the contact of each of the pair It is possible to select one that matches the spacing between the children and fit it into the pair of contacts with the pair of fitting holes to fix the spacing between the contacts individually, and to mechanically reinforce the contacts. In addition, it is possible to provide stable and reliable voltage measuring tools.

[0008]

Embodiments of the present invention will now be described with reference to the accompanying drawings . 1 to 4 show an example of a voltage measuring tool according to the present invention. According to the invention, the desired longitudinal length, for example length 3
A cylindrical gripping cylinder 1 made of a synthetic resin pipe, for example, vinyl chloride resin, having a diameter of about 00 to 400 mm and an outer diameter of about 25 mm is prepared. The gripping cylinder 1 may of course have any shape such as a rectangular cylinder, and its thickness can be appropriately selected and manufactured. According to the present invention, the grip tube 1 has a desired length, for example 600, having a voltmeter at one end, for example, positive and negative terminals to be fitted into contact with the positive and negative terminals of the digital voltmeter B shown in FIG. By inserting and housing a pair of ordinary coated lead wires 2 and 3 of about 700 mm and gripping this one gripping cylinder 1, the pair of coated lead wires 2 and 3 can be held. A cylindrical cap-like lid 4 fitted and adhered to the rear end portion of the grip cylinder 1 via an adhesive is applied to the rear end portion of the grip cylinder 1.
The above-mentioned pair of coated lead wires 2 and 3 are inserted through the insertion holes provided in the top wall to be accommodated in the holding cylinder 1. The coated lead wires 2 and 3 are preferably produced by coating the coated synthetic resin tube with different colors of red and black.

The insertion ends of the pair of coated lead wires 2 and 3 are
It is located on the front end side of the grip cylinder 1 and is electrically connected by soldering to the base portions 5a and 5b of the separately prepared desired length covered coating lead wires 5 and 6 of about 100 to 200 mm, and the connection is made. The insulating tape 7 is wrapped around the outer periphery of the portion to cover it.

The pair of measuring coated lead wires 5 and 6 must be brought into contact with the positive and negative terminals of the storage battery or the other object to be measured in order to measure the voltage between the positive and negative terminals of the measuring coated lead wires 5 and 6. Therefore, a wire having a mechanical strength that does not easily bend when it comes into contact, for example, a wire having a diameter of 1 to several mm,
A lead wire a made of a metal wire such as a metal rod is preferably covered with a tube b made of synthetic resin. In the illustrated example, a lead wire a made of a nickel-plated copper wire having a diameter of 4.5 mm is covered with a synthetic resin tube b of polypropylene having a thickness of 2.5 mm, excluding its tip, to provide a measurement lead wire. 5, 6 and the pair of tips has a thick positive and negative contactor 7 having a sharpened tip and a diameter of 4.5 mm.
8 is formed. The coated tubes b, b of the pair of coated coated lead wires 5, 6 may be colored in red and black.

Thus, according to the present invention, the pair of measuring lead wires 5 and 6 have the pair of base portions 5a and 6a supported by the front end portion 1a of the gripping cylinder 1, and the front end of the gripping cylinder 1 is supported. Derivation parts 5b, 6 derived from the part 1a to the front by a desired length
At the tip of b, the pair of contacts 8 and 9 are arranged at an interval substantially the same as the interval between the positive and negative terminals of the object to be measured.
Then, the elastic support member 10 is fitted to the front end portion 1a of the grip cylinder 1.
The pair of insertion holes 10a, 10a
A pair of parallel bases 5 of the measuring coated lead wires 5 and 6
The voltage measuring tool of the present invention was constructed by fitting a and 6a .

More specifically, the front end portion 1a of the grip barrel 1 will be described.
A support member 10 made of synthetic resin or rubber, preferably,
An elastic support member 10 made of soft rubber is fitted, and a pair of through holes 10a, 10a provided in the support member 10 and parallel to each other are inserted into the pair of measuring coated lead wires 5, 6 described above. The lead-out portions 5b and 6b, into which the base portions 5a and 6a of the above are inserted and which are led out by a predetermined length from the front end portion 1a of the grip cylinder 1,
After being slightly parallel to each other on the base portions 5a and 6a side, the base portions 5a and 6a are formed into an open leg shape in which the distance gradually increases toward the tip, and the distance S between the tip portions is a positive value of a specific storage battery or other electric device. The spacing was substantially the same as the spacing between the negative terminals.
In the illustrated example, the lead-out portions 5b, 6b of the pair of measuring coated lead wires 5, 6 are led out from the front end portion 1a of the grip barrel 1 to a desired length, for example, about 100 to 150 mm, and the open legs thereof are opened. The spacing S between the front ends of the battery-shaped portion is set to be substantially the same as the spacing between the positive and negative terminals of the specific storage battery to be measured, and the distance between the front ends of the open-leg portions is set to be different from each other at the tips thereof. A pair of contacts 8 and 9 are arranged in parallel with the above-mentioned interval S, and in the example shown in the figure, with an interval S of 82 mm, to constitute the voltage measuring device of the present invention. Thus, in order to measure the predetermined voltage of the storage battery using the voltage measuring tool of the present invention, the grip cylinder 1 is grasped with one hand, and the pair of contacts 8, 9 at the tip thereof.
Need only be applied to the positive and negative terminals of the storage battery, which eliminates the conventional trouble of holding and measuring a pair of different test rods by hand. Needless to say, for the measurement, the positive and negative connection terminals 2a and 3a of the pair of covered lead wires 2 and 3 extending rearward from the grip cylinder 1 are connected to the positive and negative terminals of the voltmeter B, respectively. . Further, the pair of contacts 8 and 9 are
Impact applied to the positive and negative terminals of the battery is
It is absorbed by the holding member 10.

In order to manufacture respective voltage measuring tools for measuring the voltages of various storage batteries having a distance between the positive and negative terminals of 82 mm or more, the pair of measuring coated lead wires 5 and 6 are prepared.
The open leg-shaped portions of the lead-out portions 5b and 6b may be manufactured in accordance with the interval (span) between the positive and negative terminals of the respective storage batteries to be measured.

As shown in FIG. 2, the pair of lead-out portions are formed by bending the front end portions of the pair of open leg portions at right angles and forming a pair of contactors 8 and 9 parallel to each other at their tips. In the case where the voltage measuring tool is provided with, the pair of contacts 8 and 9 bent at a right angle can be directed vertically downward when gripping and holding horizontally. The positive and negative terminals of the storage battery to be measured can be applied from above so that the measurement can be performed properly and easily.

The gripping cylinder 1 may be integrally formed to the front end portion 1a with the same diameter by extrusion molding so as to have an appropriate diameter, but in the example shown in the drawing, the outer diameter is about 20 mm and it is relatively thin and easy to grip. On the other hand, the front end portion 1a may have a small diameter, and the front end portion 1a may be separately molded and have a larger diameter than that, and may have a square or circular shape and be fitted and bonded to the main body of the holding cylinder 1. In the illustrated example, the front end portion 1a is a support member 1 for supporting the parallel base portions 5a and 6a of the pair of measuring coated lead wires 5 and 6.
The tubular container 11 is formed in a relatively short tubular container 11 having a thickness and a cross-sectional area sufficient to fit the zero. In the illustrated example, 2
It is possible to construct an object having a length of about 0 to 30 mm square and a length of about 20 mm by fitting it with a circular fitting hole 11a in the bottom wall to the front end mounting portion of the circular body of the gripping cylinder 1 and fixing it with an adhesive. preferable. The material of the cylindrical container 11 is generally the same as that of the gripping cylinder 1, and the shape of the container is not limited to the rectangular shape and may be a circular shape. Thus, in the illustrated example, the rectangular parallelepiped elastic support member 10 shown in FIG. 3 is fitted into the front end opening portion of the cylindrical container 11 forming the front end portion 1a, and a pair of left and right portions thereof are fitted. The parallel bases 5a and 6a of the measurement coated lead wires 5 and 6 are inserted into the insertion holes 10a and 10a, and the measurement melt coated lead wires 5 and 6 are supported by the support member 10.
Is to support.

Thus, many pairs of measuring coated lead wires in which the spacing S between the pair of contacts 8 and 9 is set for measuring objects to be measured such as various storage batteries in which the spacing between the positive and negative terminals is greatly different. Even if the intervals between the base portions 5a and 6a of the members 5 and 6 are different from each other, a large number of cylindrical containers 11 having different thicknesses and cross-sectional areas according to the respective intervals are produced, and the respective corresponding thicknesses are prepared. By attaching to the main body of the gripping cylinder 1, it is possible to configure a dedicated voltage measuring tool suitable for measuring the voltage of each specific storage battery.

The voltage measuring device constructed as described above may be used as it is, but a constant space S between the pair of contacts 8 and 9 may be fixed at any time during storage or use. preferable. For this purpose, as shown in FIG.
There is the same space S'as the contacts 8, 9 and the contacts 8, 9
Fitting holes 12a, 12 having a diameter and shape suitable for fitting into
The space fixing spacer 12 provided with a is stored in a state of being fitted to the pair of contacts 8 and 9 as shown in FIGS.
Preference is given to using. As a result, the constant space S between the pair of contacts 8 and 9 can be kept immobile, the mechanical strength increases, the stability becomes robust, and good voltage measurement becomes possible, and the storage thereof can be made safe. . The space fixing spacer 12 shown in FIG. 4A is made of an electrically insulating material, usually,
It is made of synthetic resin and has a length of 100 mm.
A thin thin plate having a width of about 10 mm and a thickness of about 2 mm, and a pair of contacts 8 shown in FIG.
Approximately 4.5 mm with a spacing of 82 mm, which is the same as the spacing S between 9
A pair of mm fitting holes 12a, 12a are provided. As shown in FIG. 1 and FIG.
It is fitted in 9 and the interval S is fixed.

As described above, the distance between the positive and negative terminals of the DUT to be measured, for example, the storage battery, varies depending on the type of the battery, and there are many that are larger or smaller than the 82 mm interval. Therefore, the space S corresponding to these
Each of the voltage measuring tools provided with a pair of contactors 8 and 9 having different lengths is manufactured, fitted into each of the contactors, and a pair of fitting holes 12a corresponding to each of which the interval is to be fixed, 12a
A large number of spacers for fixing the intervals having different intervals S ′ are prepared and used. FIG. 4B shows the above-mentioned interval S ′ of 82 mm.
The space S'between the smaller fitting holes 12a and 12a also shows an example of the space fixing spacer. FIG. 4 (c) shows the space fixing having a space S'larger than the space S'of 82 mm. A spacer is shown.

5 and 6 show another embodiment of the present invention . Immediate Chi, the pair of measuring leads 5 and 6 derived from the grip tube 1 forward constitutes its respective rotatably. That is, in the bent portion between the parallel portion on the base side and the open-leg-shaped portion that opens gradually toward the tip, each of the measuring coated lead wires 5 and 6 is moved to the left and right as shown by arrows. It is configured to be rotatable. The configuration is, for example, as clearly shown in FIG. 6, in which the lead wire a of the covered lead wire is composed of a front lead wire a1 and a rear lead wire a2, and these are connected by a rivet 13 to the shaft of the rivet. A part of the outer peripheral synthetic resin tube b that covers the lead wire a is formed in the bellows-like portion 14 in the outer peripheral covering portion of the connecting portion, which is rotatably connected right and left. Thus, the lead-out portions 5b and 6b of the pair of measuring coated lead wires 5 and 6 are opened and spread between the open leg portions in the direction of the arrow to the left or right by hand, respectively. Alternatively, the distance S between the pair of contacts 8 and 9 can be set to be narrow so that the distance S can be set according to the distance between the positive and negative terminals of the object to be measured. did. Thus, this single voltage measuring tool can be conveniently used for voltage measurement of many storage batteries having different positive and negative terminals.

As shown in the figure, the front side lead wire a1
And the opposite connecting end portion of the rear lead wire a2 is flattened into a plate shape as shown in the drawing, and the flattening portions 15 and 16 have the connecting end portion 1
It is preferable that the 5a and 16a are overlapped and rotatably connected by the rivet 13. Further, as shown in the figure, the strip-shaped flattening portions 15 and 16 are bundles 17 of a large number of thin copper wires.
It is preferable to retain the good electrical conductivity of the interconnection part by holding, caulking and soldering.

[0021] The grip tube 1, as shown in FIG. 5, it is preferable to construct the telescopic type grip tube formed by connecting the plurality of telescopically. By doing so, it can be used by adjusting it to the desired length according to the usage conditions, and even if the storage battery housed in a deep box with a reach beyond reach is extended without inserting the hand. The tip of the telescopic gripping cylinder 1 can be easily inserted for measurement, and the height space between the storage batteries arranged above and below is narrow. .

FIG. 5 and FIG. 7 show an example of such a telescopic gripping cylinder, and two synthetic resin gripping cylinders 1 and 1 having different diameters are prepared. As described above, the small-diameter gripping cylinder 1 is slidably fitted into the rear end opening of the large-diameter gripping cylinder 1, and the threaded portion 18 is provided on the outer periphery of the rear end of the front-side gripping cylinder 1 at an appropriate position. Then, the cap-shaped screw member 19 fitted to the outer circumference of the rear side gripping cylinder 1 is tightened and fixed via the threaded portion 19a on the inner circumference thereof to obtain a telescopic gripping cylinder of a predetermined length. I chose In addition, on the outer peripheral surface of the front end portion of the rear gripping cylinder 1, a small annular projection having an arcuate cross section that engages with a step 20 for contact provided on the inner peripheral surface of the rear end of the front gripping cylinder 1. Two
It is preferable to provide 1 so that both gripping cylinders 1, 1 do not separate from each other. Thus, in a state where both gripping cylinders 1 and 1 are stretched or tightened to a desired length, they are tightened and set by the screw member 19, and the pair of covered lead wires 2 and 3 which are led out to the rear of the telescopic gripping cylinder are fixed, Negative terminal 2
a and 3a are connected to the positive and negative terminals of the voltmeter B, the grip cylinder is gripped with one hand, and the pair of connectors 8 and 9 preset at a predetermined interval at the tip of the grip cylinder are connected to the positive and negative terminals of a predetermined storage battery. ， By applying it to the negative terminal, the voltage can be measured with a simple operation. In particular, it is possible to easily measure the voltages of the storage batteries that are arranged in a plurality of rows in the front-rear direction and that are arranged in a plurality of rows in the up-and-down direction by incorporating the cubicle by inserting the gripping cylinder 1 and inconveniently inserting the hand deeply. And the danger is eliminated. In the above embodiment, the two gripping cylinders 1, 1
However, it is of course possible to use a telescopic voltage measuring tool in which a larger number of gripping cylinders are connected.

[0023] Further, it is fitted to the pair of contacts 8 and 9.
A spacer 12 for fixing the space is provided between the pair of contacts 8 and 9.
Pairs with different intervals according to their respective predetermined intervals
For producing a plurality of fitting holes 12a, 12a, respectively
If necessary, match the gap between each pair of contacts 8,9.
Select what you have done and use this for the pair of contacts 8 and 9.
The pair of fitting holes 12a and 12a are fitted and contacted
The distance between the children 8 and 9 can be fixed, and mechanically supplemented.
Strengthened, reliable and stable voltage measuring tools
Can be provided.

Needless to say, the voltage measuring device of the present invention can be used not only for the storage battery but also for measuring the voltage at the positive and negative terminals of other electrical equipment.

[0025]

As described above, according to the invention of claim 1,
Grip the gripping cylinder with one hand and place the pair of contacts
It is easy to apply it to the positive or terminal of the DUT such as a fixed storage battery.
Not only can the voltage be measured,
Applied when a pair of contacts are applied to the positive terminal of the DUT.
This provides an effect that the elastic supporting member can absorb the impact.
According to the invention of claim 2, the pair of lead-out portions is manually held.
Each of which rotates to the left or right to
So as to match the desired spacing to be measured spacing between the contacts
Can be set to. According to the invention of claim 3,
Select one that matches the spacing between each pair of contacts.
Then, attach it to the pair of contacts with the pair of fitting holes.
Then, the distance between the contacts can be fixed individually.
Mechanically reinforced, reliable and stable individual voltage
A measuring tool can be provided.

[Brief description of drawings]

FIG. 1 is a front view in which a part of a voltage measuring tool according to an embodiment of the present invention is cut away.

FIG. 2 is a side view of the voltage measuring tool.

FIG. 3 is a perspective view of a support member.

4 (a) (b) (c) are front views of various spacing fixing spacers.

FIG. 5 is a perspective view showing a voltage measuring tool according to another embodiment of the present invention with a part thereof cut away.

6 is a cross-sectional view taken along line VI-VI of the voltage measuring tool of FIG.

7 is a sectional view taken along line VII-VII in FIG.

FIG. 8 is a perspective view of a pair of conventional test rods and a voltmeter.

FIG. 9 (a) is a front view showing a battery array containing a cubicle.

FIG. 9 (b) is a cut side view showing a battery array containing the cubicle.

[Explanation of symbols]

1 grip tube 1a front end 2, 3 covering the lead lines 5 and 6 for measurement coated lead wire 5a, 6a base 5b, 6b deriving unit 8,9 tangent touching the child 10 support member 11 cylindrical container 12 intervals fixing spacers 12a, 12a Fitting hole 13 Rivet 14 Bellows portion 19 Cap screw member B Voltmeter S Interval

─────────────────────────────────────────────────── ─── Continuation of the front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) G01R 1/06-1/073 G01R 31/36

Claims (3)

(57) [Claims] 1. A pair of coated lead wires to be connected to the positive and negative terminals of a voltmeter are inserted and housed in a single gripping cylinder, and the pair of insertion ends are provided at the bases of the pair of measured coated lead wires. While connecting, while supporting the base portion of the pair of measuring coated lead wires to the front end portion of the gripping cylinder, the pair of measuring coated lead wires having a desired length drawn forward from the front end portion of the gripping cylinder. At the tip of the lead-out portion, a pair of contacts are arranged at an interval substantially the same as the interval between the positive and negative terminals of the DUT , and further,
An elastic support member is fitted on the front end of the gripping cylinder and installed on this.
The pair of insertion holes in the
A voltage measuring tool having parallel bases attached . 2. A pair of voltmeters to be connected to the positive and negative terminals.
The coated lead wire is inserted and housed in one gripping cylinder, and the pair of
Connect the insertion end of the to the base of the pair of measuring lead wires.
While gripping the base of the pair of measuring coated lead wires,
It is supported at the front end of the cylinder and from the front end of the gripping cylinder.
The pair of measuring coated lead wires having a desired length forwardly derived
At the tip of the lead-out part of the
A pair of contacts are arranged at the same quality interval, and further,
At the lead-out portion of the measuring coated lead wire, the lead wire
Is composed of the front lead wire and the rear lead wire.
Rivet these lead wires around the axis of the rivet.
While connecting the left and right rotatably, covering it
Part of the resin tube at the outer peripheral coating of the connecting part
A voltage measuring tool formed on a bellows-shaped portion. 3. A pair of voltmeters to be connected to the positive and negative terminals.
The coated lead wire is inserted and housed in one gripping cylinder, and the pair of
Connect the insertion end of the to the base of the pair of measuring lead wires.
While gripping the base of the pair of measuring coated lead wires,
It is supported at the front end of the cylinder and from the front end of the gripping cylinder.
The pair of measuring coated lead wires having a desired length forwardly derived
At the tip of the lead-out part of the
A pair of contacts are arranged at the same quality interval, and further,
The spacing fixing spacer fitted to the pair of contacts,
Spaced according to the different predetermined space between a pair of contacts
For making multiple pieces, each with a pair of fitting holes
A voltage measuring tool characterized by what you mean .