JP2016200482A - Clamp type sensor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a clamp type sensor capable of clamping a measurement target electric wire without generating inclination with respect to the electric wire.SOLUTION: A clamp type sensor comprises: a sensor part Sa configured to include clamp parts 11 and 3a, one ends of which are pivoted by a rotational shaft 5 respectively, to be capable of clamping a measurement target electric wire and configured to be capable of detecting current flowing in the measurement target electric wire clamped by both of the clamp parts 11 and 3a; and a sensor part Sv configured to include clamp parts 12 and 4a, one ends of which are pivoted by the rotational shaft 5 respectively, to be capable of clamping the measurement target electric wire and configured to be capable of detecting voltage of the measurement target electric wire clamped by both of the clamp parts 12 and 4a. The sensor parts Sa and Sv are disposed side by side. The clamp parts 11 and 12 are integrally formed and a support part 10 is formed continuously in a width direction of the clamp parts 11 and 12.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a clamp type sensor configured to be able to detect a current flowing through a measurement target electric wire and a voltage of the measurement target electric wire by clamping the measurement target electric wire.

  As this type of clamp-type sensor, the applicant discloses a clamp-type sensor including a clamp portion and a sensor main body portion and configured to detect a current flowing through a measurement target wire and a voltage of the measurement target wire in the following patent document. doing. In this case, the clamp unit detects a voltage of the measurement target electric wire, a magnetic core that forms an annular magnetic path for detecting a current flowing through the measurement target electric wire, a detection coil wound around the magnetic core, and It has a detection electrode and is configured to be able to clamp the measurement target electric wire.

  Specifically, the clamp portion includes a magnetic core, a detection coil, and a detection electrode, and a fixed sensor arm having one end fixed to the sensor main body, a magnetic core, and the detection coil. The movable sensor arm is pivotally attached to the sensor main body, and is disposed between the fixed sensor arm and the movable sensor arm so that one end thereof is rotatable to the sensor main body together with the one end of the movable sensor arm. A pressing arm that clamps the measurement target wire in combination with the fixed sensor arm and presses the measurement target wire in the vicinity of the detection electrode is provided. In this case, a first operation lever extending in the opposite direction to the movable sensor arm is disposed at one end of the movable sensor arm, and the one end of the pressing arm extends in the opposite direction to the pressing arm. A second operating lever is provided.

  The second operating lever is disposed in a state of covering the first operating lever, and the first operating lever is biased in a direction protruding from the opening of the sensor main body by a spring disposed in the sensor main body. Has been. Accordingly, in the clamp type sensor disclosed by the applicant, the movable sensor arm is always urged so as to rotate toward the fixed sensor arm by the urging force of the spring urging the first operation lever. Yes. Further, the second operation lever is urged in a direction away from the first operation lever by a spring disposed between the second operation lever and the first operation lever. As a result, in the clamp type sensor disclosed by the applicant, the pressing arm is rotated toward the fixed sensor arm by the biasing force of the spring biasing the second operating lever with respect to the first operating lever. Is always energized.

  When measuring the current flowing through the measurement target wire and the voltage of the measurement target wire using the clamp sensor, first, the measurement target wire is clamped by the clamp unit. Specifically, as an example, the movable sensor arm is rotated with respect to the sensor main body by grasping the sensor main body with a finger placed on the second operation lever, and the distal end (the other end of the movable sensor arm). ) And the distal end portion (the other end portion) of the fixed sensor arm are separated from each other (the clamp portion is opened). At this time, as a result of the second operating lever being rotated in the direction away from the first operating lever by the biasing force of the spring disposed between the two operating levers, the holding arm is moved with respect to the sensor body. It is rotated and the front-end | tip part is spaced apart from the internal peripheral surface of a fixed sensor arm. Thereby, it will be in the state which can clamp a measuring object electric wire.

  Next, the measurement target electric wire is introduced between the movable sensor arm and the pressing arm and the fixed sensor arm, and the finger hung on the second operation lever is released. As a result, the movable sensor arm is rotated toward the fixed sensor arm by the biasing force of the spring disposed between the sensor main body and the first operation lever, and the tip ends of the two sensor arms (the other end) Are in contact with each other, and the pressing arm is rotated toward the fixed sensor arm by the urging force of the spring disposed between the two operation levers, so that the detection sensor in the fixed sensor arm is near the detection electrode. The measurement target electric wire is pressed. Thereby, the clamping of the electric wire to be measured is completed. After this, the current flowing through the measurement target wire and the voltage of the measurement target wire are measured by operating the operation unit of the measurement device main body (main unit) to which the clamp type sensor is connected to execute the measurement process. Is done.

Japanese Unexamined Patent Publication No. 2009-41925 (page 4-13, FIG. 1-9)

  However, the clamp type sensor disclosed by the applicant has the following problems to be improved. In other words, in the clamp type sensor disclosed by the applicant, when detecting the current flowing through the measurement target wire or the voltage of the measurement target wire, the clamp arm is arranged by a pressing arm disposed between the fixed sensor arm and the movable sensor arm. A configuration is adopted in which the measurement target electric wire is pressed near the detection electrode in the fixed sensor arm. In this case, as shown in FIG. 14, in the clamp type sensor 1x disclosed by the applicant (hereinafter, the components of the clamp type sensor 1x will be described by adding “x” to the end of the reference numerals). The fixed sensor arm 2x is formed with a width Wx necessary and sufficient to accommodate the magnetic core 5x and the detection electrode 6x. In addition, the holding arm 4x that clamps the measurement target wire X in combination with the fixed sensor arm 2x is also formed to have a width Wx that is approximately the same as that of the fixed sensor arm 2x.

  Therefore, in the clamp type sensor 1x disclosed by the applicant, the width Wx of the fixed sensor arm 2x and the pressing arm 4x that are in contact with the circumferential surface of the measurement target electric wire X is slightly narrowed, and as shown in FIG. The clamp-type sensor 1x may be inclined with respect to the measurement target electric wire X. In such a state, as a result of a gap between the fixed sensor arm 2x on which the detection electrode 6x is disposed and the measurement target electric wire X, the detection electrode 6x to be positioned in the vicinity of the measurement target electric wire X is the measurement target electric wire. There is a possibility that the voltage detection accuracy of the measurement target electric wire X may be lowered due to being slightly away from X.

  Further, since the distance between the detection electrode 6x in the fixed sensor arm 2x and the measurement target wire X changes according to the degree of inclination of the clamp sensor 1x with respect to the measurement target wire X, the measured value (voltage value) depends on the clamp state. ) May change slightly. Further, the distance between the magnetic core 5x in the fixed sensor arm 2x and the magnetic core 5x in the movable sensor arm 3x and the measurement target electric wire X changes according to the degree of inclination of the clamp sensor 1x with respect to the measurement target electric wire X. The measured value (current value) may slightly change depending on the clamp state. For this reason, it is preferable to improve this point.

  This invention is made | formed in view of this subject which should be improved, and it aims at providing the clamp type sensor which can clamp, without producing the inclination with respect to a measuring object electric wire.

  In order to achieve the above object, the clamp type sensor according to claim 1 includes a pair of first clamp arms each having one end portion pivotally supported by a first shaft member, and is configured to be able to clamp the measurement target electric wire. The first sensor unit configured to be able to detect either the current flowing through the measurement target electric wire clamped by the first clamp arms or the voltage of the measurement target electric wire, and one end portion of each of the shafts are respectively axised by the second shaft member A pair of supported second clamp arms is provided so that the measurement target wire can be clamped, and the other of the current flowing through the measurement target wire clamped by the second clamp arms and the voltage of the measurement target wire. A clamp-type sensor having a second sensor portion configured to detect the first shaft member, wherein the first shaft member and the second shaft member are the same. The first sensor unit and the second sensor unit are arranged side by side so as to be in any one of the above state and a state parallel to each other, and either one of the first clamp arms and the both Either one of the two clamp arms is integrally formed to form a measurement target electric wire support that is continuous in the width direction of the two clamp arms.

  The clamp type sensor according to claim 2 is the clamp type sensor according to claim 1, wherein the first clamp arm of the other one of the first clamp arms is operable to open the other one of the first clamp arms. An operation arm extending at one end, and the other of the second clamp arms, the other second clamp arm, the other first clamp arm, and the other operation arm. An opening operation interlocking member that rotates the other second clamp arm in conjunction with the other first clamp arm by an opening operation on the operation arm.

  According to the clamp type sensor of the first aspect, the first shaft member that pivotally supports the pair of first clamp arms and the second shaft member that pivotally supports the pair of second clamp arms are concentric and parallel to each other. The first sensor part and the second sensor part are arranged side by side so as to be in one of the states, and either one of the first clamp arms and one of the second clamp arms are integrally formed. By forming the measurement target wire support portion that is continuous in the width direction of both clamp arms, the measurement target wire support portion is brought into contact with and supported in a sufficiently long range along the longitudinal direction of the measurement target wire during clamping. Therefore, the inclination of the clamp type sensor with respect to the measurement target electric wire can be suitably avoided. As a result, the voltage detection electrode can be suitably arranged close to the measurement target electric wire. As a result, the voltage of the measurement target electric wire can be detected with high accuracy and the magnetic core for detecting the current can be detected. As a result of suitably avoiding a situation in which the position of the measurement target wire changes every time it is clamped, the current flowing through the measurement target wire can also be detected with high accuracy.

  According to the clamp type sensor of claim 2, the operation arm extended to one end portion of the other first clamp arm so that the other of the first clamp arms can be opened, and both the second clamp arms The other second clamp arm, the other first clamp arm, and the operation arm are disposed, and the other second clamp arm is interlocked with the other first clamp arm by opening the operation arm. By providing an opening operation interlocking member that rotates the clamp arm, the opening operation interlocking member is not provided, and the operation arms that are respectively extended to both the clamp arms are separately opened to open both sensor portions. Compared to, both sensor parts can be opened by a single opening operation on any of the operating arms, so it can be used when clamping the measurement target wire. The burden on can be reduced sufficiently.

It is an external appearance perspective view of the clamp type sensor 1 of the state which closed the clamp arms 3 and 4. FIG. It is a top view of clamp type sensor 1 in the state where clamp arms 3 and 4 were closed. 1 is an exploded perspective view of a clamp type sensor 1. FIG. It is an external appearance perspective view of the clamp type sensor 1 of the state which opened the clamp arms 3 and 4. FIG. It is another external perspective view of the clamp type sensor 1 in a state where the clamp arms 3 and 4 are closed. 2 is an external perspective view showing an internal structure of a clamp arm 3. FIG. 3 is an external perspective view showing an internal structure of the clamp arm 4. FIG. It is a left side view of clamp type sensor 1 in the state where clamp arms 3 and 4 were closed. The clamp type in which the clamp arm 4 is opened until the projecting piece 36 of the clamp arm 4 contacts the operation portion 3b of the clamp arm 3 and the contact piece 35 of the clamp arm 4 contacts the clamp portion 3a of the clamp arm 3. 2 is a left side view of the sensor 1. FIG. It is a left view of the clamp type sensor 1 in a state where the clamp arms 3 and 4 are completely opened. It is a left view of the clamp type sensor 1 of the state which clamps the measuring object electric wire X. It is a left view of the clamp type sensor 1 of the state which operated the operation part 3b and opened both the clamp arms 3 and 4. FIG. It is sectional drawing of the clamp type sensor 1 of the state which clamps the measuring object electric wire X. FIG. It is sectional drawing of the clamp type sensor 1x of the state which clamps the measuring object electric wire X normally. 4 is a cross-sectional view showing a state in which a clamp sensor 1x is inclined with respect to a measurement target electric wire X.

  Hereinafter, embodiments of a clamp type sensor according to the present invention will be described with reference to the accompanying drawings.

  The clamp type sensor 1 shown in FIG. 1 is an example of a “clamp type sensor”, and is configured to be capable of clamping the measurement target electric wire X (see FIGS. 10 to 13) and connected to a measurement device (not shown) for measurement. The current flowing through the target electric wire X and the voltage of the measurement target electric wire X can be detected. Specifically, as shown in FIGS. 1 to 5, the clamp type sensor 1 includes a casing 2, clamp arms 3 and 4, a rotating shaft 5, springs 6 a and 6 b, a signal processing unit 7, and signal cables 8 a and 8 b. I have.

  As shown in FIG. 3, the casing 2 includes a casing body 2 a and a lid 2 b and is formed in a container shape that can accommodate the signal processing unit 7 and the like. In this case, in the clamp type sensor 1 of this example, an arc shape is formed on the front side of the left side portion of the casing 2 (the portion facing the clamp arm 3 in plan view: the lower portion in FIG. 2: the left portion in FIG. 13). One of the pair of magnetic cores 21 (see FIG. 3) is accommodated to constitute the clamp portion 11 (an example of “one second clamp arm”). Moreover, in this clamp type sensor 1, the detection electrode 31 and the shield are provided on the front side of the casing 2 on the front side of the right side (the part facing the clamp arm 4 in plan view: the upper part in FIG. 2: the right part in FIG. 13). The electrode 32 (see FIG. 3) is accommodated to constitute the clamp portion 12 (an example of “one first clamp arm”).

  A housing 15 is formed on the back side of the casing 2. Furthermore, as shown in FIG. 3, a plurality of ribs 16 with shaft holes for supporting the clamp arms 3 and 4 by the rotating shaft 5 are provided upright on the upper surface of the lid portion 2 b in the casing 2.

  The clamp arm 3 is configured by integrally forming a clamp portion 3a and an operation portion 3b. The clamp portion 3a is an example of the “other second clamp arm”, and the shape in a side view is formed in an almost arc shape as a whole, and the other of the pair of magnetic cores 21 (see FIGS. 3 and 6). ) Is housed. The operation portion 3b is another example of the “operation arm”, and is extended to one end portion of the clamp portion 3a so that a protruding piece 36 of the clamp arm 4 to be described later can come into contact therewith, and the spring 6a is accommodated. ing. The clamp arm 3 is pivotally supported on the casing 2 (the rib 16 with the shaft hole of the lid portion 2b) by a rotating shaft 5 through which a shaft hole formed between the clamp portion 3a and the operation portion 3b is inserted.

  The clamp arm 4 is configured by integrally forming a clamp portion 4a and an operation portion 4b. The clamp portion 4a is an example of “the other first clamp arm”, and contains the shield electrode 33 (see FIGS. 3 and 7). The operation portion 4b is an example of an “operation arm”, and extends to the clamp portion 4a and accommodates a spring 6b. The clamp arm 4 is pivotally supported on the casing 2 (the rib 16 with the shaft hole of the lid portion 2b) by a rotating shaft 5 through which a shaft hole formed between the clamp portion 4a and the operation portion 4b is inserted.

  In this case, the clamp type sensor 1 of this example is provided with a plurality of “opening operation interlocking members”. Specifically, in the clamp type sensor 1 of the present example, the contact piece 35 formed on the clamp portion 4a of the clamp arm 4 corresponds to an “opening operation interlocking member” (“the other first clamp arm” is “ An example of a configuration in which an “opening operation interlocking member” is provided). Moreover, in the clamp type sensor 1 of this example, the operation part 3b extended in the one end part of the clamp part 3a in the clamp arm 3 and the protrusion piece 36 formed in the operation part 4b in the clamp arm 4 are combined. The “opening operation interlocking member” is configured (an example of a configuration in which the “opening operation interlocking member” is disposed on the “other second clamp arm” and the “operation arm”).

  Further, in the clamp type sensor 1 of the present example, the convex portion 25 formed on the clamp portion 3a in the clamp arm 3 and the protruding piece 36 formed on the operation portion 4b in the clamp arm 4 are combined with the “open operation”. An “interlocking member” is configured (an example of a configuration in which an “opening operation interlocking member” is disposed on the “one second clamp arm” and the “operation arm”). In this case, in the clamp type sensor 1 of this example, as shown in FIG. 8, the convex portion 25 of the clamp arm 3 is formed on the protruding piece 36 of the clamp arm 4 when both the clamp arms 3 and 4 are completely closed. Close or in contact. The functions of these “opening operation interlocking members” will be described later in detail.

  Further, in the clamp type sensor 1 of the present example, the sensor unit Sa (“second sensor”) that can detect the current flowing through the measurement target electric wire X in combination with the clamp unit 11 of the casing 2 and the clamp unit 3 a of the clamp arm 3. Part ") is configured. In the clamp type sensor 1, a sensor unit Sv (of the “first sensor unit”) that can detect the voltage of the measurement target electric wire X in combination with the clamp unit 12 of the casing 2 and the clamp unit 4 a of the clamp arm 4. An example) is configured.

  Further, the clamp type sensor 1 of the present example in which the clamp part 11 is configured on the front side of the left side part of the casing 2 and the clamp part 12 is configured on the front side of the right side part of the casing 2. In “an example of a configuration in which either one of both first clamp arms and one of both second clamp arms is integrally formed”, the both clamp portions 11 and 12 correspond to a “measurement target wire support portion”. A supporting portion 10 is configured. In this case, the shape of the support portion 10 when viewed from the side is formed in a substantially arc shape as a whole in accordance with the shape of the magnetic core 21. In the clamp type sensor 1 of this example, as shown in FIG. 2, the width W of the support portion 10 (the width along the longitudinal direction of the measurement target electric wire X to be clamped as described later) is the width Wa of the clamp arm 3. It is a sufficiently wide width that is the sum of the width Wb of the clamp arm 4.

  The rotation shaft 5 is an example of a “shaft member” in which the “first shaft member” and the “second shaft member” are integrated (“the first shaft member and the second shaft member are concentric”). 3), a pin 5a and a flange 5b are provided, and the clamp arms 3 and 4 are pivotally supported with respect to the ribs 16 with the shaft holes of the casing 2. As shown in FIG. Thereby, in the clamp type sensor 1 of this example, the sensor part Sa configured by the clamp part 11 of the casing 2 and the clamp part 3a of the clamp arm 3 and the clamp part 12 of the casing 2 and the clamp part 4a of the clamp arm 4 The configured sensor part Sv is arranged side by side in the width direction of the clamp type sensor 1.

  As described above, the spring 6a is accommodated in the operation portion 3b of the clamp arm 3 and urges the operation portion 3b to rotate the clamp arm 3 in the direction of arrow B1 shown in FIG. The tip of the part 3a is pressed against the tip of the clamp part 11 in the direction of arrow B2. Further, as described above, the spring 6b is accommodated in the operation portion 4b of the clamp arm 4, and urges the operation portion 4b to rotate the clamp arm 4 in the direction of arrow B1 shown in FIG. The tip of the clamp part 4a is pressed against the support part 10 (clamp part 12) of the casing 2 in the direction of arrow B2.

  The signal processing unit 7 includes a circuit board that can process the current detection signal acquired from the sensor unit Sa and the voltage detection signal acquired from the sensor unit Sv, and is connected to a measurement apparatus connected via the signal cables 8a and 8b. On the other hand, it accommodates in the accommodating part 15 of the casing 2 so that both detection signals can be output. The signal cables 8 a and 8 b are connected to the signal processing unit 7 and pulled out from the casing 2.

  When the current flowing through the measurement target wire X and the voltage of the measurement target wire X are measured using the clamp sensor 1, both the sensor portions Sa are connected in a state where both signal cables 8a and 8b are connected to a measurement device (not shown). , Sv to clamp the measurement target wire X. Specifically, as an example, four fingers from the index finger to the little finger are attached to the bottom surface of the accommodating portion 15 in the casing 2, and the belly of the thumb is attached to the operation portion 4 b of the clamp arm 4. Move closer to your finger. At this time, the operation portion 4b is rotated about the rotation shaft 5 in the direction of the arrow Aa1 shown in FIG. 8 against the urging force of the spring 6b.

  In addition, as a result of the clamp part 4a extending from the operation part 4b being rotated in the direction of the arrow Aa2 about the rotation shaft 5, the tip of the clamp part 4a is separated from the clamp part 12 (support part 10). Be made. As a result, as shown in FIG. 9, the protruding piece 36 provided on the operation portion 4 b abuts on the operation portion 3 b in the clamp arm 3, and the contact piece 35 provided on the clamp portion 4 a is clamped on the clamp arm 3. It is made to contact | abut to the part 3a.

  When the operation portion 4b is further rotated with respect to the casing 2 as indicated by an arrow Ab1 in the figure, the operation portion 3b with which the projecting piece 36 abuts is operated against the urging force of the spring 6a. As a result of being rotated in the direction of the arrow Ab1 together with the part 4b, the clamp part 3a in which the operation part 3b is extended is rotated in the direction of the arrow Ab2 in conjunction with the rotation of the clamp part 4a. At this time, the state in which the contact piece 35 of the clamp arm 4 is in contact with the inner side of the clamp portion 3a is maintained, whereby the direction of the arrow Ab2 of the clamp portion 3a in conjunction with the rotation of the clamp portion 4a is maintained. Rotation to is assisted.

  Next, as shown in the figure, the measurement target wire X is interposed between the clamp portions 11 and 3a and the clamp portions 12 and 4a so that the measurement target wire X is positioned on the support portion 10 (on the clamp portions 11 and 12). Is introduced. Next, weaken the force that brings your thumb close to other fingers. At this time, the operating portion 4b is rotated in the direction of the arrow B1 about the rotation shaft 5 by the urging force of the spring 6b. As a result, the clamp portion 4a is rotated in the direction of the arrow B2 about the rotation shaft 5. As a result, the operating portion 3b is rotated about the rotation shaft 5 in the direction of arrow B1 by the urging force of the spring 6a. As a result, the clamp portion 3a rotates about the rotation shaft 5 in the direction of arrow B2. Be moved.

  As a result, as shown in FIG. 11, the tip portions of the clamp portions 11 and 3a constituting the sensor portion Sa are brought into contact with each other, and both magnetic cores 21 (see FIG. 3) in both the clamp portions 11 and 3a are brought into contact. The measurement target electric wire X is pressed against the support portion 10 so as to be sandwiched between the clamp portions 12 and 4a constituting the sensor unit Sv, while being arranged in an annular shape so as to surround the measurement target electric wire X. In this state, the detection electrodes 31 in 12 are arranged in close proximity to the measurement target wire X. Thereby, the clamping operation of the measurement target electric wire X is completed.

  In this case, in the clamp type sensor 1 of this example, the measurement target electric wire X can be clamped by an operation method different from the above operation method. Specifically, as an example, the four fingers from the index finger to the little finger are attached to the bottom surface of the housing portion 15 in the casing 2 and the belly of the thumb is attached to the operation portion 3b of the clamp arm 3, and the thumb is put in this state. Move closer to your finger. At this time, the operation portion 3b is rotated about the rotation shaft 5 in the direction of the arrow Aa1 shown in FIG. 8 against the urging force of the spring 6a. In addition, as a result of the clamp part 3a in which the operation part 3b is extended being rotated in the direction of the arrow Aa2 about the rotation shaft 5, the tip of the clamp part 3a is separated from the clamp part 11 (support part 10). Be made.

  Further, in the clamp type sensor 1 of the present example in which the convex portion 25 of the clamp arm 3 is in the state of being close to or in contact with the protruding piece 36 of the clamp arm 4 when both the clamp arms 3 and 4 are closed, the arrow Aa2 The projection 25 pushes the protruding piece 36 in conjunction with the rotation of the clamp part 3a in the direction, so that the operation part 4b of the clamp arm 4 provided with the protruding piece 36 is subjected to the biasing force of the spring 6b. Accordingly, it is rotated about the rotation shaft 5 in the direction of the arrow Aa1. As a result, as shown in FIG. 12, the clamp part 4a with the operation part 4b extended is rotated in the direction of the arrow Aa2 around the rotation shaft 5 in conjunction with the rotation of the clamp part 3a. The tip of the clamp part 4a is separated from the clamp part 12 (support part 10).

  Next, as shown in the figure, the measurement target wire X is interposed between the clamp portions 11 and 3a and the clamp portions 12 and 4a so that the measurement target wire X is positioned on the support portion 10 (on the clamp portions 11 and 12). Is introduced. Next, weaken the force that brings your thumb close to other fingers. At this time, the operating portion 3b is rotated about the rotation shaft 5 in the direction of the arrow B1 by the urging force of the spring 6a. As a result, the clamp portion 3a is rotated about the rotation shaft 5 in the direction of the arrow B2. As a result, the operating portion 4b is rotated about the rotation shaft 5 in the direction of the arrow B1 by the urging force of the spring 6b. As a result, the clamp portion 4a rotates about the rotation shaft 5 in the direction of the arrow B2. Be moved.

  As a result, as shown in FIG. 11, the tip portions of the clamp portions 11 and 3a constituting the sensor portion Sa are brought into contact with each other, and both magnetic cores 21 (see FIG. 3) in both the clamp portions 11 and 3a are brought into contact. The measurement target electric wire X is pressed against the support portion 10 so as to be sandwiched between the clamp portions 12 and 4a constituting the sensor unit Sv, while being arranged in an annular shape so as to surround the measurement target electric wire X. In this state, the detection electrodes 31 in 12 are arranged in close proximity to the measurement target wire X. Thereby, the clamping operation of the measurement target electric wire X is completed.

  In this case, in the clamp type sensor 1 of this example, the sensor unit Sa and the sensor unit Sv are arranged side by side, and the clamp unit 11 of the sensor unit Sa and the clamp unit 12 of the sensor unit Sv are continuous in the width direction. The support part 10 is formed integrally. Therefore, in the clamp type sensor 1 of this example, even if the measurement target wire X is clamped by any of the above-described operation methods, as shown in FIG. 13, a sufficiently long range of the clamped measurement target wire X (see FIG. Since the support portion 10 is in contact with the range of the width W), the inclination of the clamp sensor 1 with respect to the measurement target electric wire X is difficult to occur.

  Thereafter, by operating the operation unit of the measurement device to start the measurement process, the current flowing through the measurement target electric wire X based on the sensor signal output from the sensor units Sa and Sv and subjected to signal processing by the signal processing unit 7 And the voltage of the measuring object electric wire X is measured, respectively.

  As described above, according to the clamp sensor 1, the “first shaft member” that pivotally supports the clamp portions 11 and 3a and the “second shaft member” that pivotally supports the clamp portions 12 and 4a are concentric. These are pivotally supported by the rotation shaft 5 so that the sensor portions Sa and Sv are arranged side by side, and the clamp portion 11 and the clamp portion 12 are integrally formed to be continuous in the width direction of both the clamp portions 11 and 12. By forming the support portion 10 to be clamped, the support portion 10 can be brought into contact with and supported in a sufficiently long range along the longitudinal direction of the measurement target electric wire X at the time of clamping. The inclination of the sensor 1 can be suitably avoided. As a result, the detection electrode 31 can be suitably disposed close to the measurement target electric wire X. As a result, the voltage of the measurement target electric wire X can be detected with high accuracy, and the measurement target for both the magnetic cores 21 and 21 can be detected. As a result of suitably avoiding a situation in which the position of the electric wire X changes every time it is clamped, the current flowing through the measurement target electric wire X can be detected with high accuracy.

  Further, according to the clamp type sensor 1, the clamp portion 4a of the clamp arm 4 is arranged on the operation portion 4b extended to one end portion of the clamp portion 4a so that the clamp portion 4a can be opened, and the clamp portions 3a, 4a and the operation portion 4b. Provided with an abutment piece 35, a projecting piece 36 and an operation portion 3b as an “open operation interlocking member” which rotates the clamp portion 3a in conjunction with the clamp portion 4a by an opening operation on the operation portion 4b. Thus, without providing “opening operation interlocking members” such as the contact piece 35, the projecting piece 36, and the operation portion 3b, “operation arms (for example, operations in the clamp sensor 1) extended to both“ clamp arms ”are provided. Compared with the configuration in which both the sensor portions Sa and Sv are opened by separately opening the portions 3b and 4b) ", both sensors are opened by a single opening operation (in this example, an opening operation on the operating portion 4b). Sa, since Sv can open each be sufficiently alleviate the burden on the user when clamping the work to be measured wire X.

  Furthermore, according to this clamp type sensor 1, it arrange | positions at the operation part 3b extended in the one end part of the clamp part 3a so that opening of the clamp part 3a of the clamp arm 3 is possible, and the clamp part 3a and the operation part 4b. In addition, by providing the convex portion 25 and the protruding piece 36 as an “opening operation interlocking member” for rotating the clamp portion 4a in conjunction with the clamp portion 3a by opening operation with respect to the operation portion 3a, the convex portion 25 and the protruding portion are provided. Without providing the “opening operation interlocking member” such as the piece 36, the “operation arms (for example, the operation units 3 b and 4 b in the clamp type sensor 1)” extended to both “clamp arms” are separately opened. Compared with a configuration in which both sensor portions Sa and Sv are opened, both sensor portions Sa and Sv can be opened by a single opening operation (in this example, an opening operation on the operation portion 3b). Kill Therefore, it is possible to sufficiently reduce the burden on the user at the time of clamping operation of the measurement target wire X.

  The configuration of the “clamp sensor” is not limited to the configuration example of the clamp sensor 1 described above. For example, a clamp type in which the sensor unit Sv that can detect the voltage of the measurement target electric wire X is a “first sensor unit” and the sensor unit Sa that can detect a current flowing through the measurement target electric wire X is a “second sensor unit”. Although the sensor 1 has been described as an example, a “first sensor unit” that can detect “current flowing through the measurement target wire” and a “second sensor unit” that can detect “voltage of the measurement target wire” A “clamp type sensor” can also be configured (not shown), and the configuration in which the detection electrode 31 is disposed in the clamp unit 12 as the “measurement target electric wire support unit” has been described as an example. The detection electrode 31 can be arranged in the clamp part 4a or in both the clamp parts 12 and 4a.

  In addition, a configuration in which a contact piece 35 capable of contacting the inside of the clamp portion 3a as the “second clamp arm” is disposed as an “opening operation interlocking member” in the clamp portion 4a as the “first clamp arm” is an example. As described above, “an abutment piece (not shown)” that can abut on the outside of the “first clamp arm (for example, the clamp portion 4a in the clamp sensor 1)” is referred to as an “open operation interlocking member”. A configuration is adopted in which the “second clamp arm” is rotated in conjunction with the rotation of the “first clamp arm” by being disposed on the “second clamp arm (for example, the clamp portion 3a in the clamp type sensor 1)”. You can also

  Further, by forming a “projection piece” capable of coming into contact with the operation portion 4 b of the clamp arm 4 on the operation portion 3 b of the clamp type sensor 1, the operation portion 4 b of the clamp arm 4 and the operation portion 3 b are formed. The “projection piece” can also be configured to function as an “opening operation interlocking member”. In addition, the number of “opening operation interlocking members” can be any number among one, two, and four or more (not shown). In this case, when adopting a configuration in which only the abutting piece 35 (or the “abutting piece” formed on the clamp portion 3a) is used as the “opening operation interlocking member”, the operation portion 4b in the clamp type sensor 1 is employed. In addition, only one of the operation units 3b may be provided as an “operation arm”, and the other may be unnecessary.

  Further, the example in which both the “shaft members” are concentric by using the single rotation shaft 5 as the “first shaft member” and the “second shaft member” has been described. The member and the second shaft member are made concentric while being made of different members, or the first shaft member and the second shaft member are made of different members and made parallel to each other. (Not shown). Furthermore, although the clamp type sensor 1 formed separately from the “measurement device” has been described as an example, the “clamp type sensor” is integrated with the “measurement device body” as a part of the configuration of the “measurement device”. (Not shown).

DESCRIPTION OF SYMBOLS 1 Clamp type sensor 2 Casing 2a Casing main body 2b Cover part 3, 4 Clamp arm 3a, 4a, 11, 12 Clamp part 3b, 4b Operation part 5 Rotating shaft 5a Pin 5b Flange 6a, 6b Spring 7 Signal processing part 8a, 8b Signal cable 10 Support portion 15 Housing portion 16 Rib with shaft hole 21 Magnetic core 25 Protruding portion 31 Detection electrode 32, 33 Shield electrode 35 Contact piece 36 Projection piece Sa, Sv Sensor portion W, Wa, Wb Width X Measurement target electric wire

Claims (2)

A pair of first clamp arms each having one end pivotally supported by the first shaft member are configured to be able to clamp the measurement target electric wire, and the current flowing through the measurement target electric wire clamped by the first clamp arms. And a first sensor unit configured to be able to detect any one of the voltages of the measurement target wires,
A pair of second clamp arms each having one end portion pivotally supported by the second shaft member are provided so that the measurement target electric wire can be clamped, and the measurement target electric wire clamped by the second clamp arms flows. A clamp-type sensor having a second sensor unit configured to detect the other of the current and the voltage of the measurement target electric wire,
The first sensor unit and the second sensor unit are arranged side by side so that the first shaft member and the second shaft member are either concentric or parallel to each other. A clamp-type sensor in which either one of the first clamp arms and one of the second clamp arms are integrally formed to form a measurement target wire support portion that is continuous in the width direction of the two clamp arms. . An operation arm extended to the one end of the other first clamp arm so that the other first clamp arm of the first clamp arms can be opened;
One of the second clamp arms, the other second clamp arm, the other first clamp arm, and the operation arm are disposed, and the other second clamp arm is opened by opening the operation arm. The clamp type sensor according to claim 1, further comprising an opening operation interlocking member that rotates the other second clamp arm in conjunction with one clamp arm.

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