JP6522459B2 - Jig for voltage measurement - Google Patents

Description

  The present invention relates to a voltage measurement jig used when checking the load-side terminal voltage of a branch breaker assembled to a distribution board.

  After installation and construction of the residential distribution panel, an electrician will conduct a voluntary check or a connection check such as a completion inspection will be conducted. One of the connection confirmation items is voltage confirmation of the branch circuit in a live state. This is a confirmation of 100V / 200V. If there is a misconnection at the time of construction, 100V is applied to the circuit to be supplied 200V and the load does not operate normally or 200V is applied to the circuit to be supplied 100V. This is done to prevent this, as the load may lead to an accident such as burnout.

This voltage check is usually performed by bringing a probe such as a tester into contact with the conductive part of the load-side terminal of the branch breaker and measuring it. A hole for voltage check was provided in the vicinity of the load side terminal because there was no exposed portion such as a terminal screw.
For example, Patent Document 1 discloses a branch breaker referred to as a thin breaker and having a width of about 10 mm, and the load side terminal is formed of a quick connection terminal to which a wire can be inserted and connected, and a probe is inserted immediately below it. A test insertion hole is provided for voltage measurement, insulation resistance measurement, and detection of electric power.

Unexamined-Japanese-Patent No. 2007-278582

  The thin branch breaker as described in Patent Document 1 is assembled to the distribution board because the inspection insertion hole also faces in the lateral direction when viewed from the front of the distribution board as with the load-side terminal. Then, it was difficult to check from the front, and the voltage check work was a bothersome task because the wires inserted into the load side terminals became an obstacle.

  Then, in view of such a problem, the present invention similarly faces the insertion hole for inspection by the fact that the load side terminal formed by the quick connection terminal is facing sideways when viewed from the front of the distribution board. It is an object of the present invention to provide a voltage measuring jig capable of easily performing a voltage check on a branch breaker that

In order to solve the above-mentioned subject, invention of claim 1 voltage detection and insulation resistance measurement near the quick-connection terminal of the branch breaker constituted by the quick-connection terminal which load side terminal inserts and connects an electric wire, It is a jig for voltage measurement provided with a pair of sensor projection inserted in order to measure terminal voltage to a test insertion hole provided for at least voltage detection of electric detection, and the sensor projection And a probe mounting portion for inserting and holding two probes connected to a separately provided voltage measuring device, and a pair of sensor protrusions and 2 inserted and held in the probe mounting portion The probes of the present invention are characterized in that they are electrically connected by the conductors disposed inside the voltage measurement jig case.
According to this configuration, since the pair of probes extending from the voltmeter are attached to the jig case, the operator does not need to perform the bothersome operation of operating the two probes with the left and right hands, and the terminal voltage can be operated by one hand operation. Can be measured with a simple operation. In addition, if the sensor protrusions are arranged in a direction different from the direction of the probe to be attached, the sensor protrusions can be easily inserted even if the inspection insertion hole of the branch breaker faces in the direction difficult to insert from the front of the distribution board And smooth measurement becomes possible.

The invention according to claim 2 is characterized in that, in the configuration according to claim 1, the directions of the two probes held by the probe mounting portion are substantially orthogonal to the projecting directions of the pair of sensor protrusions. .
According to this configuration, even if the inspection insertion hole of the branch breaker does not face the front of the distribution board, the sensor protrusion is provided to protrude in the lateral direction with respect to the direction of the mounted probe. The voltage can be measured by the insertion operation from the front of the distribution board. Therefore, it can measure by simple operation.
In addition to “orthogonal” (in the direction perpendicular to 90 °), “substantially orthogonal” includes an angle close to orthogonal (85 ° to 95 °).

According to the invention of claim 3, in the configuration according to claim 1 or 2, the voltage measurement jig case has a main body case and a movable case separable from the main body case, and one of the pair of sensor protrusions Is assembled to the main body case, and the other sensor projection is assembled to the movable case, and the main body case has a plurality of assembled positions of the movable case, and the sensor projections It is characterized in that the distance can be changed.
According to this configuration, for example, when the positions of the load-side terminals of the branch breaker differ between the 100 V output and the 200 V output, the positions of the sensor protrusions assembled to the movable case are changed to cope with the terminal positions of both voltages. It becomes possible to measure the voltage of the load-side terminal with different terminal positions with one voltage measuring jig.

According to the invention of claim 4, in the configuration according to any one of claims 1 to 3, the release for operating the release lever provided on the branch breaker to enable extraction of the electric wire inserted into the load side terminal. It has a lever operation piece.
According to this configuration, when removing the electric wire from the branch breaker, the release operation can be performed without directly operating the release lever, and the release operation can be easily performed even if the release lever is small and difficult to operate.

The invention according to claim 5 is that, in the configuration according to any one of claims 1 to 4, it has a strip gauge for setting the length of the core wire obtained by peeling the coating of the electric wire inserted into the load side terminal to a predetermined length. It features.
According to this configuration, since the length of the core portion of the electric wire connected to the branch breaker can be easily optimized, the troublesome operation of separately measuring the length of the core is not required.

According to the invention of claim 6, in the configuration according to any one of claims 1 to 5, a cover operation for operating a terminal cover provided on a load-side terminal arrangement surface of the branch breaker to close unused terminals. It is characterized by having a piece.
According to this configuration, since the terminal cover can be operated by the cover operation piece without directly operating the terminal cover, even if the terminal cover is disposed in a narrow space, it can be easily operated.

  According to the present invention, if the sensor protrusions are arranged in a direction different from that of the probe to be attached, in particular, the sensor projections are arranged in the direction substantially orthogonal to the probe to be attached, the inspection insertion hole of the branch breaker is in front of the distribution board. Even when the probe is directed in the lateral direction which is difficult to insert, the probe itself can be inserted easily from the front of the distribution board by inserting it from the front of the distribution board, and a smooth voltage measurement becomes possible.

It is an example of a jig for voltage measurement concerning the present invention, and is perspective explanatory drawing of the state before inserting a probe. It is a perspective view which shows the state which inserted the probe from the state of FIG. FIG. 3 is a cross-sectional explanatory view of the state of FIG. 2; The assembly explanatory drawing of one sensor protrusion fixedly installed is shown, (a) is an exploded view, (b) is a perspective view of the assembled state. The assembly explanatory drawing of the other movable sensor protrusion is shown, (a) is an exploded view, (b) is a perspective view of the assembled | attached state. It is explanatory drawing which assembles | attaches the movable member of FIG. 5 to the main body case of the jig | tool for voltage measurement, (a) is an exploded view, (b) has shown the state assembled | attached. It is explanatory drawing which moves a movable member, (a) is the removed state, (b) has shown the assembled state. It is explanatory drawing which measures the load side terminal voltage of a branch breaker, (a) shows the state which has arrange | positioned the jig for voltage measurement in the measurement position of a branch breaker, (b) is A part enlarged view. It is explanatory drawing which measures the load side terminal voltage of a branch breaker, (a) shows the state which is measuring, (b) is a B section enlarged view. It is explanatory drawing which operates the releasing lever of a branch breaker, and has shown the state which made the corresponding | compatible site | part of the jig | tool for voltage measurement approach the releasing lever. It is explanatory drawing which operates the releasing lever of a branch breaker, and has shown the state which engaged the corresponding part of the jig for voltage measurement with the releasing lever. It is explanatory drawing which operates the release lever of a branch breaker, and has shown the state which release operation of the jig for voltage measurement made to engage was carried out. It is explanatory drawing which operates the terminal cover of a branch breaker, and shows the state which raised the terminal cover with the jig | tool for voltage measurement, and obstruct | occluded the insertion hole for a test | inspection. It is explanatory drawing which operates the terminal cover of a branch breaker, and shows the state which lowered | hung the terminal cover with the jig for voltage measurement, and exposed the insertion hole for a test | inspection. It is explanatory drawing of a strip gauge, and has shown the state which approached the electric wire to the predetermined site | part of the jig for voltage measurement. It is explanatory drawing of a strip gauge, and has shown the state which penetrated the electric wire in the predetermined site | part of the jig for voltage measurement. It is explanatory drawing of a strip gauge, and has shown the state which cut | disconnected the exposed site | part of the electric wire penetrated to the predetermined site | part of the jig for voltage measurement, and was made into predetermined length. It is an explanatory view which performs insulation resistance measurement and electric detection using a jig for voltage measurement. It is explanatory drawing which shows the state which is performing insulation resistance measurement and electrical inspection using the jig for voltage measurement.

Hereinafter, embodiments embodying the present invention will be described in detail with reference to the drawings. 1 to 3 show an example of a voltage measuring jig according to the present invention, FIG. 1 is a perspective explanatory view of a state before connecting a probe of a voltage measuring instrument, and FIG. 3 is a cross-sectional explanatory view of a state in which a probe is connected.
The voltage measurement jig is a jig used for voltage measurement, in which the probe 100 of a voltage measurement instrument (not shown) such as a tester is mounted as shown in the drawing, and is used for voltage measurement. A probe mounting portion 10a for inserting and holding 100, and two sensor protrusions 2 for insertion into an inspection insertion hole 65 (shown in FIG. 8) for performing an inspection such as voltage measurement provided in the branch breaker And a sensor forming unit 10b including (2a, 2b). The probe mounting portion 10a is formed to have a thick body so as to be easily grasped.

  The sensor projection 2 is integrally formed with the conductor 3 (3a, 3b) disposed in the case 10 constituting the voltage measurement jig as shown in FIG. 3, and is connected to the inserted probe 100 It is configured. The details will be described below.

Of the two sensor protrusions 2a and 2b, one sensor protrusion (hereinafter referred to as "first protrusion") 2a is fixed and installed, and the other sensor protrusion (hereinafter referred to as "second protrusion") 2b is movable Installed in
FIG. 4 shows the assembly structure of the first projection 2a, where (a) shows the state before assembly and (b) shows the state after assembly. As shown in FIG. 4A, the first protrusion 2a is a conductor (hereinafter referred to as a "first conductor") 3a formed of a metal rod disposed in a main body case 40 forming the main part of the case 10. The proximal end of the first conductor 3a constitutes a connecting portion 31 with the inserted probe 100.

  The first protrusion 2a is formed to be bent so as to be orthogonal to the insertion direction of the probe 100 which is also the arrangement direction of the first conductor 3a, and can be easily inserted into the inspection insertion hole 65 in the direction orthogonal to the probe 100 Is formed. When the first conductor 3a is assembled so that the first protrusion 2a protrudes from the predetermined hole 41 of the main body case 40, the cover is closed by the lid member 42. The lid member 42 accommodates the first conductor 3a and is provided with a mounting portion of the movable case 50 described later provided with the second protrusion 2b.

5 and 6 show an assembled structure of the second protrusion 2b. FIG. 5 is an explanatory view of assembling the second projection 2b to the movable case 50, and FIG. 6 is an explanatory view of assembling the movable case 50 to the main body case 40. (a) is a state before assembling, and (b) is after assembling Indicates the state of
The second projection 2b is formed at the tip of a conductor (hereinafter referred to as "second conductor") 3b made of a metal rod housed in the movable case 50 first as shown in FIG. 5, and the second conductor 3b The proximal end of the connector constitutes a connecting part 31 with the inserted probe 100. Thus, one of the two attached probes 100 is connected to the first protrusion 2a, and the other is connected to the second protrusion 2b.

The second projection 2b is integrally formed on the second conductor 3b and bent to be orthogonal to the insertion direction of the probe 100 which is also the arrangement direction of the second conductor 3b, and the inspection in the direction orthogonal to the probe 100 It is formed to be insertable into the insertion hole 65. The second conductor 3 b is accommodated in the movable case 50, and the second protrusion 2 b is inserted into the hole 51 of the movable case 50.
The back of the movable case in which the second projection 2b is exposed in this way is covered by the cover member 52, and then mounted on the main case 40 as shown in FIG. At this time, the second protrusion 2b is mounted in engagement with one of the two second protrusion engaging grooves 43 provided in the main body case 40, and the first protrusion 2a and the second protrusion 2b are in the same direction. Be placed.

  As described above, the case 10 includes the probe mounting portion 10a and the sensor forming portion 10b, but is separately formed into the main body case 40 provided with the first protrusion 2a and the movable case 50 provided with the second protrusion 2b. .

FIG. 7 shows a state in which the movable case 50 is moved to change the distance between the first protrusion 2a and the second protrusion 2b. As shown in FIG. 7A, the movable case 50 is once removed and engaged with the other of the two second projection engagement grooves 43 provided on the lid member 42 of the main body case 40, as shown in FIG. Attach to As described above, the movable case 50 can be moved and assembled, and the distance between the sensor protrusions 2 can be changed.
Reference numeral 44 denotes a locking portion on the side of the main body case 40 formed on the lid member 42, 53 denotes a locking portion on the movable case 50 side, and the tip of the movable case 50 is locking both locking portions 44 and 53 with each other It is fixed.

8 and 9 show how the load-side terminal voltage of the branch breaker is measured by the voltage measurement jig configured as described above, and FIG. 8 shows the position of the sensor projection 2 in the inspection insertion hole 65 of the branch breaker. FIG. 9 shows a state in which the sensor projection 2 is inserted into the inspection insertion hole 65 and measured.
Here, the branch breaker will be described. FIG. 8 shows a state in which six branch breakers 60 are arranged in a row. The branch breaker 60 is configured to correspond to a single-phase three-wire electric path, and comprises an operation lever 61 which is turned on / off at the top, two voltage phases in the distribution board at the back, and one neutral phase. It has three power supply side terminals 62 vertically arranged to connect a main stem bar (not shown) having three copper bars, and a load side terminal 63 is arranged on the front surface. The load side terminal 63 is formed of a quick connection terminal connected only by inserting the electric wire 5.

  Although three terminals are provided on the front surface of the branch breaker 60 provided with the load side terminals 63 according to the power supply side terminals 62, a terminal cover 64 (shown in FIG. 13) for closing other than the terminals to be used is installed. By sliding the terminal cover 64, only the two terminals to which the electric wire 5 as a branch wiring is connected are exposed. In addition, an inspection insertion hole 65 for performing a voltage check or the like of the load side terminal 63 is provided immediately below each load side terminal 63, and the load side terminal 63 is inserted into the upper end of the front surface. A release lever 66 is provided to release the locking of the wire 5 in the terminal in order to facilitate removal of the wire 5.

Thus, the wire 5 is connected to the exposed two terminals of the load-side terminal 63 consisting of three terminals, and the two terminals to be selected enable 100 V output or 200 V output, and FIGS. 5 shows a connected state.
In the case of a mode for outputting 100 V, as shown in FIG. 7, a jig for voltage measurement in which the sensor protrusions 2 are arranged close to each other is used, and as shown in FIG. The tool is set, and the sensor projection 2 is inserted into the inspection insertion hole 65.

In addition, as shown in FIG. 8, the load side terminal 63 is arranged with a voltage electrode terminal (not shown), a neutral electrode terminal 63b and a voltage electrode terminal 63c from the top, If it connects to the terminal which is not and voltage pole terminal 63c), it becomes 200V output. When measuring the terminal voltage of the branch breaker 60 of this 200 V output, what the sensor protrusion 2 was arrange | positioned apart as shown in FIG. 6 is used.
Further, the ridge-like protrusion 54 formed on the movable case 50 which is the sensor forming portion 10 b is a positioning member for the sensor protrusion 2, and when the sensor protrusion 2 is positioned, the ridge-like protrusion 54 serves as the electric wire 5. By engaging for gripping, positioning is facilitated.

Thus, by arranging the sensor projection 2 in the direction orthogonal to the probe 100 to be attached, the direction of the attached probe even if the inspection insertion hole 65 of the branch breaker 60 does not face the front of the distribution board. On the other hand, since the sensor projection 2 is provided in the lateral direction, the probe 100 itself can measure the voltage by the insertion operation from the front of the distribution board. Therefore, it can measure by simple operation.
In addition, since the pair of probes 100 extended from the voltage measuring instrument is mounted on the case 10, the operator does not need to perform the bothersome operation of operating the two probes 100 with the left and right hands. It can measure, and it can measure by simple operation.
Furthermore, for example, when the position of the load-side terminal 63 to be measured of the branch breaker 60 differs between the 100 V output and the 200 V output, the position of the sensor protrusion 2 b assembled to the movable case 50 is changed to obtain both voltages. It can be made to correspond to the terminal position, and one voltage measuring jig can measure the voltage of the load side terminal 63 having different terminal positions.

  Further, in the case 10 of the voltage measurement jig, the release lever operation piece 12 for operating the release lever 66 of the branch breaker 60, the cover operation piece 13 for sliding operation of the terminal cover 64, and the electric wire inserted in the load side terminal 63 A strip gauge 14 is provided to make the length of the core wire from which the coating 5 is peeled off a predetermined length. These will be described in order.

  10 to 12 are explanatory views for operating the release lever 66 of the branch breaker 60, and FIG. 10 shows a state in which the release lever operation piece 12 of the voltage measurement jig is brought close to the release lever 66. FIG. 12 shows a state in which the release lever 66 is inserted into and engaged with the release lever operation piece 12. FIG. 12 shows the engaged voltage measurement jig rotated upward as shown by the arrow C in FIG. The state which released the latching of the electric wire 5 by (not shown) is shown.

  The release lever operation piece 12 is protruded from the side of the probe mounting portion 10b of the case 10 as shown in FIG. 1, and is configured to insert and hold the release lever 66. A state where the release lever 66 is inserted into the release lever operation piece 12 is a state shown in FIG. 11, and the release lever 66 is held so as to be gripped. The state in which the holding lever is turned upward (rotating in the direction of the arrow) in the holding state is the state shown in FIG. 12, and the release lever 66 is turned upward by this operation to release the release mechanism inside the branch breaker 60 (detailed ) Does not work. As a result, the engagement between the wire 5 inserted into the load-side terminal 63 and the terminal fitting is released, and the wire 5 can be pulled out.

13 and 14 are explanatory views for operating the terminal cover 64 of the branch breaker 60, and FIG. 13 shows a state where the terminal cover 64 is slid upward by the voltage measurement jig to close the inspection insertion hole 65. FIG. 14 shows a state in which the terminal cover 64 is slid downward to expose the inspection insertion hole 65. The terminal cover 64 is configured to cover the inspection insertion hole 65 in addition to the load-side terminal 63. Therefore, when the terminal cover 64 is closed, the sliding operation of the terminal cover 64 is necessary.
The cover operation piece 13 which consists of a projection engaged with the operation part 64a of the terminal cover 64 is provided in the back end part of the 1st projection 2a of the jig (case 10) for voltage measurement, and the jig for voltage measurement is operated By engaging with the portion 64a and moving up and down, as shown in FIGS.

15 to 17 are explanatory views of the strip gauge 14, and FIG. 15 shows a state in which the wire 5 is brought close to a predetermined portion of the voltage measurement jig, and FIG. 16 shows the wire 5 at a predetermined portion of the voltage measurement jig. FIG. 17 shows a state in which the extra length portion of the electric wire 5 inserted into the predetermined portion of the voltage measurement jig is cut into a predetermined length.
The strip gauge 14 projects from the side of the probe mounting portion 10b of the case 10 of the voltage measurement jig, and is integrally formed with the release lever operation portion 12, and the core wire insertion hole 14a through which the core wire 5a of the electric wire 5 is inserted. And a core wire placement portion 14b for placing the core wire 5a that has been inserted and determining the cutting position.

  As shown in FIG. 15, the electric wire 5 with the core wire 5a exposed by peeling the coating is made to approach the strip gauge 14 in the insertion direction of the probe 100, and the core wire 5a is inserted into the core wire insertion hole 14a as shown in FIG. The front end is placed on the core line placement portion 14b. At this time, the tip end portion of the core wire 5a protruding from the core wire placement portion 14b has an extra length, and as shown in FIG. 17, by cutting the protruding portion, an appropriate length of length inserted into the load side terminal 63 is obtained. The core wire 5a can be obtained.

As described above, when the electric wire 5 is pulled out, the release operation can be performed without directly operating the release lever 66, and even if the release lever 66 is small and difficult to operate, it can be easily released. Further, since the terminal cover 64 can be operated by the cover operation piece 13 without directly operating the terminal cover 64, even if the terminal cover 64 is disposed in a narrow space, it can be easily operated.
Further, since the length of the core portion of the electric wire 5 connected to the branch breaker 60 can be easily optimized, the troublesome operation of separately measuring the length of the core 5a is not required.

  Although the above-mentioned jig for voltage measurement is a jig for measurement of terminal voltage, it can also be used as a jig for measurement of insulation resistance or detection of electricity. FIG. 18 and FIG. 19 show the state used for such purpose, and one probe 100 of a pair of probes connected to an insulation resistance measuring instrument or an electroscope not shown is not shown. It is mounted to one probe mounting portion 10a connected to the first projection 2a and used. In this case, since the second protrusion 2b is not necessary, the movable case 50 is not attached as shown in FIG. Then, as shown in FIG. 19, the first protrusion 2a is inserted into the inspection insertion hole 65, and the inspection is performed. In this case, the other probe is connected to a ground terminal or the like of a separately provided distribution board (not shown).

In the above embodiment, the protruding direction of the sensor projection 2 is orthogonal to the mounting direction of the probe 100. However, the protruding direction may not be orthogonal to the mounting direction of the probe 100, and may be substantially orthogonal between 85 ° and 95 °. Also good. Furthermore, smooth insertion is possible with respect to the inspection insertion hole 65 facing side only by providing an angle of about 60 ° instead of being orthogonal, and providing an angle of about 110 ° larger than the orthogonal. It is good.
In addition, although two assembling positions of the movable case 50 with respect to the main body case 40 can be selected, the assembling may be performed at more positions.

  2 · · · Sensor projection, 3 · · Conductor, 10 · · · Case, 10a · · · · Probe mounting portion, 10b · · · Sensor forming portion, 12 · · Release lever operation piece, 13 · Cover operation piece, 14 · · · Strip gauge .. 40 body case 50 movable case 60 branch breaker 63 load side terminal 64 terminal cover 65 insertion hole for inspection 66 release lever 100. probe.

Claims (6)

A pair inserted for measuring the terminal voltage to the inspection insertion hole provided in the vicinity of the quick connection terminal of the branch breaker constituted by the quick connection terminal where the load side terminal is connected by inserting the electric wire A voltage measuring jig provided with a sensor protrusion of
A sensor forming unit provided with the sensor protrusion, and a probe mounting unit for inserting and holding two probes connected to a separately provided voltage measuring device;
The pair of sensor protrusions and the two probes inserted and held in the probe mounting portion are electrically connected to each other by a conductor disposed inside a voltage measurement jig case. Jig for measuring voltage.   The jig for voltage measurement according to claim 1, wherein the directions of the two probes held by the probe mounting portion and the projecting directions of the pair of sensor protrusions are substantially orthogonal to each other. The voltage measurement jig case has a main body case and a movable case separable from the main body case.
One of the pair of sensor protrusions is assembled to the main body case, and the other sensor protrusion is assembled to the movable case.
The voltage measurement according to claim 1 or 2, wherein the main body case has a plurality of mounting positions of the movable case, and the distance between the sensor protrusions can be changed by changing the mounting position. Jig.   The release lever operation piece for operating the release lever provided in the said branch breaker in order to enable extraction of the electric wire inserted in the said load side terminal, It is characterized by the above-mentioned. The jig for voltage measurement as described.   The jig for voltage measurement according to any one of claims 1 to 4, further comprising a strip gauge for setting a length of a core wire obtained by peeling a coating of an electric wire inserted into the load-side terminal to a predetermined length.   The voltage according to any one of claims 1 to 5, further comprising a cover operation piece for operating a terminal cover provided on a load side terminal disposition surface of the branch breaker to close an unused terminal. Measuring jig.

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