WO2020162340A1 - Capteur - Google Patents

Capteur Download PDF

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Publication number
WO2020162340A1
WO2020162340A1 PCT/JP2020/003595 JP2020003595W WO2020162340A1 WO 2020162340 A1 WO2020162340 A1 WO 2020162340A1 JP 2020003595 W JP2020003595 W JP 2020003595W WO 2020162340 A1 WO2020162340 A1 WO 2020162340A1
Authority
WO
WIPO (PCT)
Prior art keywords
electric wire
wire insertion
electrode
insertion portion
respect
Prior art date
Application number
PCT/JP2020/003595
Other languages
English (en)
Japanese (ja)
Inventor
真 笠井
大桂 池田
智春 坂井
小百合 手塚
Original Assignee
日置電機株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP2019147880A external-priority patent/JP7353860B2/ja
Application filed by 日置電機株式会社 filed Critical 日置電機株式会社
Priority to CN202080011579.5A priority Critical patent/CN113366226B/zh
Publication of WO2020162340A1 publication Critical patent/WO2020162340A1/fr

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B7/00—Connections of rods or tubes, e.g. of non-circular section, mutually, including resilient connections
    • F16B7/18—Connections of rods or tubes, e.g. of non-circular section, mutually, including resilient connections using screw-thread elements
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
    • G01R15/14—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
    • G01R15/16—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using capacitive devices

Definitions

  • the present invention relates to a sensor capable of detecting a detected amount of a covered electric wire in a non-contact state with a conductor of the covered electric wire.
  • the applicant has disclosed a voltage sensor capable of detecting the voltage supplied to the covered electric wire in a non-contact state with the core wire (conductor) of the covered electric wire in the following patent document.
  • This voltage sensor includes an electrode portion having an electrode that is capacitively coupled to a core wire through an insulating coating of a covered electric wire when measuring a voltage, and a screw formed into a cylindrical shape into which the electrode portion can be inserted and integrated with the electrode portion.
  • Part hereinafter, the element other than the electrode in the electrode part and the element composed of the screw part are also referred to as "electrode holding part" and the electrode holding part are formed into a cylindrical shape into which a covered electric wire can be inserted.
  • a male screw is formed on the outer peripheral surface of the electrode holding portion, and a female screw capable of screwing the male screw of the electrode holding portion is formed on the inner peripheral surface of the wire insertion portion.
  • the voltage sensor When measuring the voltage using this voltage sensor, attach the voltage sensor to the insulated wire. Specifically, first, the covered electric wire is inserted into the notch of the electric wire insertion portion so that the covered electric wire is inserted into the electric wire insertion portion. Next, the electrode holding part in which the lock nut is screwed onto the male screw is screwed into the wire insertion part along the axial direction from the base end side of the wire insertion part. At this time, the electrode integrated with the electrode holding portion is moved together with the electrode holding portion toward the tip end side of the wire inserting portion as the electrode holding portion is rotated (screwed) with respect to the electric wire inserting portion. As a result, the tip end surface of the electrode comes into contact with the insulating coating of the coated electric wire inserted into the electric wire insertion portion.
  • the electrode holding portion is further moved toward the tip end side of the wire insertion portion, and the tip end surface of the electrode is pressed against the covered electric wire (insulation coating).
  • the covered electric wire is sandwiched between the edge portion of the notch in the electric wire insertion portion and the tip surface of the electrode.
  • the lock nut is rotated with respect to the electrode holding portion (male screw) so that the lock nut is pressed against the base end portion of the wire insertion portion.
  • the relative rotation (loosening) of the electrode holding portion with respect to the wire insertion portion is restricted, and the mounting of the voltage sensor on the covered electric wire is completed.
  • the voltage sensor is connected to the measuring device by connecting a connection cable to the connector provided at the base end of the voltage sensor. After that, by operating the operation unit of the measuring device to execute the measurement process, the voltage of the covered electric wire is detected and measured via the voltage sensor.
  • the connection cable is removed from the voltage sensor.
  • the electrode holding part male screw
  • the electrode holding part with respect to the wire insertion part Release the rotation restriction.
  • the electrode holding part is rotated with respect to the electric wire insertion part in a direction opposite to that at the time of mounting.
  • the electrode held by the electrode holding part is moved together with the electrode holding part toward the proximal end side of the electric wire insertion part, The tip end surface of the electrode is separated from the covered electric wire inserted in. Then, the detached work is completed by removing the covered electric wire from the notch of the electric wire insertion portion.
  • the voltage sensor disclosed by the applicant has the following issues to be improved. Specifically, in the voltage sensor disclosed by the applicant, the tip end surface of the electrode held by the electrode holding part is screwed by screwing the electrode holding part (male screw) into the wire insertion part (female screw). The coated electric wire is sandwiched between the electric wire insertion portion and the edge portion of the cutout in the electric wire insertion portion, whereby the electrode is pressed against the coated electric wire (insulating coating).
  • the sensor when detecting the amount to be detected using this type of sensor, the sensor may be attached to the coated electric wire arranged in the vicinity of various heating elements such as the engine, motor, transformer and arithmetic processor. Also, when detecting the detected amount of the covered electric wire arranged near the heating element, specify the detected amount in the stopped/operating state of the device to which the covered electric wire is connected, and check the sensor safety against the covered electric wire. In some cases, the mounting work is performed while the device is stopped for the purpose of various mounting works. Further, detection of the detected amount using this type of sensor is performed inside a running vehicle or in the vicinity of an operating machine tool (that is, in an environment where vibration is applied to the sensor or the covered electric wire). Sometimes.
  • the above voltage sensor when the above voltage sensor is attached to the covered electric wire, make sure that the electrode is pressed against the covered electric wire (insulation coating) inserted into the electric wire insertion part with sufficient pressing force.
  • the electrode holding part is screwed in.
  • the voltage sensor When the device is stopped (that is, the heating element is not generating heat), the voltage sensor is attached to the covered wire, and when the device is moved to the operating state after that, the voltage from the heating element While the sensor and the covered electric wire are thermally expanded, the insulating coating formed of the resin material is softened and is easily deformed.
  • the thermal expansion of the voltage sensor causes the wire insertion portion
  • the distance between the edge of the notch and the tip surface of the electrode is smaller than that before thermal expansion (when mounted on the covered electric wire). Therefore, when the voltage sensor and the covered electric wire thermally expand due to the heat generated by the heating element, the softened insulating cover is deformed as the distance between the edge of the notch in the electric wire insertion portion and the tip surface of the electrode changes. This causes the covered electric wire to be crushed.
  • the pressing force of the electrode against the coated electric wire decreases, so especially in an environment where vibration is applied to the sensor or the coated electric wire, the voltage sensor is covered along the longitudinal direction of the coated electric wire. It may move with respect to the electric wire.
  • the insulating coating deformed in the softened state due to the temperature rise does not return to the state before the deformation.
  • a gap may be formed between the covered electric wire (insulating coating) and the electrode. In such a state, not only the voltage sensor easily moves with respect to the coated wire along the longitudinal direction of the coated wire, but also the distance between the core wire (conductor wire) and the electrode of the coated wire changes and As a result of the change in the degree of capacitive coupling of the electrodes, it may be difficult to accurately detect the detected amount (voltage).
  • the combination of materials that makes the coefficient of thermal expansion of the wire insertion part higher than the coefficient of thermal expansion of the electrode holding part or the electrode, or the coefficient of thermal expansion of the electrode holding part or the electrode is similar to the coefficient of thermal expansion of the wire insertion part.
  • the voltage sensor is made up of a combination of materials such that the thermal expansion of the voltage sensor causes the distance between the edge of the notch in the wire insertion part and the tip surface of the electrode to be before the thermal expansion (covered wire). It will be wider than when attached to).
  • the voltage sensor thermally expands due to the heat generated by the heating element, the pressing force of the electrode against the covered electric wire (insulation coating) is reduced, so that the length of the covered electric wire is increased especially in an environment where vibration is applied to the sensor and the covered electric wire.
  • the voltage sensor becomes easy to move with respect to the covered electric wire along the direction. Further, the distance between the core wire (conductor wire) of the covered electric wire and the electrode changes, and the degree of capacitive coupling of the electrode to the core wire changes, which may make it difficult to accurately detect the detected amount (voltage). There is.
  • the relative position of the electrode holding portion with respect to the electric wire insertion portion is locked by the lock nut.
  • a structure is adopted in which the rotation (loosening) is regulated and the relative movement of the electrode with respect to the coated electric wire (insulation coating) is regulated.
  • the lock nut is rotated with respect to the electrode holding portion so that the relative rotation (loosening) of the electrode holding portion with respect to the electric wire insertion portion can be appropriately regulated. Move it so that the lock nut is pressed against the base end of the wire insertion part with sufficient pressing force.
  • the voltage sensor is composed of a combination of materials such that the coefficient of thermal expansion of the wire insertion part or the lock nut is lower than the coefficient of thermal expansion of the electrode holding part, heat generated by the above-mentioned heating element, etc.
  • the temperature of the voltage sensor is raised and each part is thermally expanded, the pressing force of the lock nut against the base end portion of the wire insertion part may be reduced, and the rotation restricting force of the lock nut may be reduced.
  • the sensor when detecting the amount to be detected using this type of sensor, the sensor may be attached to the covered electric wire in an environment of higher temperature than when detecting. In this case, each part of the voltage sensor contracts as the temperature decreases when the environment is changed to a temperature lower than that when it is attached to the covered electric wire.
  • a combination of materials such that the coefficient of thermal expansion of the wire insertion part or the lock nut is higher than that of the electrode holding part (the contraction rate of the electrode holding part when the temperature drops
  • the voltage sensor is made up of a combination of materials such that the contraction rate of the nut is higher
  • the parts are contracted due to the contraction of the parts when they are moved to a lower temperature environment than when they are installed.
  • the pressing force of the lock nut against the base end of the lock nut may decrease and the rotation restricting force of the lock nut may decrease.
  • the wire insertion part rotates with respect to the electrode holding part when the rotation restricting force by the lock nut is lowered as described above, and the wire insertion part is inserted.
  • a gap may be formed between the coated electric wire (insulating coating) inserted in the portion and the electrode.
  • the voltage sensor easily moves with respect to the coated wire along the longitudinal direction of the coated wire, but also the distance between the core wire (conductor wire) and the electrode of the coated wire changes and As a result of the change in the degree of capacitive coupling of the electrodes, it may be difficult to accurately detect the detected amount (voltage).
  • the electrode holding part is rotated from the covered electric wire by rotating the electrode holding part with respect to the electric wire insertion part in the opposite direction to that when the electrode holding part is screwed into the electric wire insertion part.
  • the structure that separates is adopted.
  • this voltage sensor there is a configuration in which the electric wire insertion portion and the electrode holding portion are maintained in an integrated state by screwing the female screw provided on the electric wire insertion portion and the male screw provided on the electrode holding portion. Has been adopted. Therefore, in this voltage sensor, the wire insertion portion and the electrode holding portion are separated by releasing the screwing of the male screw of the electrode holding portion with the female screw of the wire insertion portion.
  • the senor according to claim 1 has a cylindrical electrode holding portion, and a state in which the electrode holding portion is inserted into the electrode holding portion and is held by the electrode holding portion, and with respect to a conductor of a covered electric wire.
  • An electric wire insertion portion configured to be able to insert the covered electric wire, an outer peripheral surface of the electrode holding portion and an inner peripheral surface of the electric wire insertion portion, an outer peripheral surface of the electric wire insertion portion and an inner peripheral surface of the electrode holding portion.
  • a threaded portion that can be screwed into each other is formed on one of the surfaces, and the relative rotation of the electrode holding portion with respect to the electric wire insertion portion causes the electric wire insertion portion and the electrode holding portion to extend along the cylinder length direction.
  • the electrode is configured to be movable in a separating direction in which the electrode is separated from the covered electric wire, and the detected amount of the covered electric wire is detected through the electrode capacitively coupled to the conductive wire.
  • a sensor configured to be able to detect in a non-contact state with respect to, wherein the electrode holding portion is formed in a tubular shape through which the electrode can be inserted and is integrated with the electrode, and the wire insertion portion.
  • the engaging groove portion and the engaging convex portion, the other of the engaging groove portion and the engaging convex portion is provided so as to be engageable with one of the engaging groove portion and the engaging convex portion, and relative to the electric wire insertion portion in the cylinder length direction.
  • First member whose relative rotation with respect to the electric wire insertion portion is restricted in a state in which various movements are allowed, and a tubular shape capable of inserting the first member, and the screw portion is formed.
  • a second member attached to the first member in a state in which relative movement in the cylinder length direction with respect to the first member and relative rotation with respect to the first member are allowed, and the second member. And a first biasing member that biases the first member in the approaching direction.
  • the sensor according to claim 2 is the sensor according to claim 1, wherein the first urging member is formed of a coil spring that can pass through the first member, and is arranged in the second member together with the first member. It is set up.
  • the electrode holding portion is formed in a tubular shape through which the second member can be inserted, and is arranged in the tubular length direction with respect to the second member.
  • the third member attached to the second member in a state where the relative movement of the second member is allowed and the relative rotation with respect to the second member is restricted, and the third member with respect to the second member.
  • a second urging member for urging the electric wire in the approaching direction the insertion portion side engaging portion being provided in the insertion portion side abutting portion with which the third member abuts in the electric wire insertion portion, and
  • a holding portion side contact portion that is brought into contact with the insertion portion side contact portion is provided with a holding portion side engagement portion that can engage with the insertion portion side engagement portion, and the insertion portion side.
  • the relative rotation of the third member with respect to the electric wire insertion portion is restricted by engaging the engagement portion and the holding portion side engagement portion with each other.
  • the second biasing member is formed of a coil spring that can be inserted through the second member, and is arranged in the third member together with the second member. It is set up.
  • the sensor according to claim 5 is the sensor according to claim 3 or 4, wherein the third member is formed of a first resin material containing at least one of a phosphorescent pigment and a fluorescent pigment.
  • the sensor according to claim 6 is the sensor according to any one of claims 1 to 5, wherein the sensor is disposed between the electrode holding portion and the wire insertion portion and is relative to the electrode holding portion in the cylinder length direction.
  • a fourth member is provided, which abuts on a member abutting convex portion provided on the peripheral surface of the electrode holding portion and restricts relative movement of the wire insertion portion with respect to the electrode holding portion in the separating direction. ..
  • the sensor according to claim 7 is the sensor according to claim 6, wherein the fourth member is formed in an annular shape and is press-fitted into the electric wire insertion portion and fixed to the electric wire insertion portion.
  • the sensor according to claim 8 is the sensor according to claim 7, wherein the electrode holding part is provided with only one member-contacting convex part, and the fourth member is formed in a C shape.
  • the circumferential length of the gap between the one end portion and the other end portion of the fourth member in the circumferential direction is along the circumferential direction of the electrode holding portion in a state where the gap is not press-fitted into the wire insertion portion.
  • Elastic deformation of the member contacting convex portion which is equal to or longer than the length and is shorter than the length of the member contacting convex portion along the circumferential direction of the electrode holding portion in a state of being press-fitted into the wire insertion portion. It is configured to be possible.
  • the sensor according to claim 9 is the sensor according to any one of claims 1 to 8, wherein one end portion of the wire insertion portion in the cylinder length direction is opened so that the electrode holding portion and the fourth member can be inserted. And the other end in the cylinder length direction is closed, and the inner surface of the electric wire insertion portion has a facing surface facing the tip end surface of the electrode held by the electrode holding portion, and the opposite surface of the electric wire insertion portion has a cylinder.
  • An electric wire contact portion is provided which is formed so as to be linearly continuous with a part of the inner edge portion on the other end side of the notch in the radial direction.
  • the sensor according to claim 10 is the sensor according to claim 9, wherein the wire insertion part has an opening width along the circumferential direction of the wire insertion part on the other end side of the notch from the one end part.
  • the other end side of the notch is formed in an arc shape so as to become narrower toward the other end, and the wire contact portion is provided on the top of the inner edge of the notch on the other end side. Is provided.
  • the sensor according to claim 11 is the sensor according to any one of claims 1 to 10, wherein the wire insertion portion is formed of a second resin material containing at least one of a phosphorescent pigment and a fluorescent pigment.
  • the electrode holding portion holding the electrode is formed in a tubular shape through which the electrode can be inserted and integrated with the electrode, and relative movement in the tubular length direction with respect to the electric wire insertion portion is allowed.
  • the first member whose relative rotation with respect to the electric wire insertion portion is restricted in the closed state, and the threaded portion formed in the tubular shape capable of inserting the first member and provided in the electric wire insertion portion
  • a second member attached to the first member in a state in which a relatively threaded portion is formed and relative movement in the cylinder length direction with respect to the first member and relative rotation with respect to the first member are allowed,
  • a first urging member that urges the first member toward the second member in the approaching direction.
  • the sensor of claim 1 when detecting the amount to be detected under a temperature environment different from that when the sensor is attached to the covered electric wire, thermal expansion and contraction of each part of the sensor and the covered electric wire due to temperature change. Even if the insulation coating of the covered electric wire is softened, the first biasing member biases the first member toward the second member, so It is possible to maintain the state in which the existing electrode is pressed against the covered electric wire with a suitable pressing force. Accordingly, since the state in which the electrodes are capacitively coupled to the conductor of the covered electric wire can be maintained, the detected amount applied to the covered electric wire can be suitably detected.
  • the second member is excessively rotated with respect to the electric wire insertion portion in which the covered electric wire is inserted in the notch and the second member is moved too close to the electric wire insertion portion, Since the first member moves relatively to the second member in the separating direction against the urging force of the urging member, the electrode held by the first member is pressed against the covered electric wire excessively strongly. It is possible to avoid being pressed by force. As a result, the detected amount can be detected without causing breakage of the covered electric wire.
  • the first biasing member is configured by the coil spring that allows the first member to be inserted, unlike the configuration in which the leaf spring or the like is adopted as the first biasing member, The first member can be biased to the second member with a suitable biasing force regardless of the rotational posture of the second member with respect to the member.
  • the electrode holding portion is formed in a tubular shape that allows the second member to be inserted therethrough, allows relative movement in the tubular length direction with respect to the second member, and is relative to the second member.
  • An electric wire insertion includes a third member attached to the second member in a state in which relative rotation is restricted, and a second urging member that urges the third member in the approaching direction with respect to the second member.
  • the insertion portion side engaging portion is provided at the insertion portion side contact portion, and the holding portion side engaging portion capable of engaging with the insertion portion side engaging portion is provided at the holding portion side contact portion of the third member.
  • the third member is moved in the separating direction against the urging force of the second urging member. Unless the insertion portion side engaging portion and the holding portion side engaging portion are kept engaged, rotation of the third member with respect to the wire insertion portion, that is, rotation of the second member with respect to the wire insertion portion is restricted. The maintained state is maintained. This avoids the situation in which the first member and the electrode move in the separating direction with respect to the wire insertion portion due to the unintentional rotation of the second member with respect to the wire insertion portion, and the electrode is pressed against the covered electric wire. The state can be maintained appropriately.
  • the second biasing member is configured by the coil spring that can insert the second member
  • the wire insertion is different from the configuration in which the leaf spring or the like is adopted as the second biasing member. Regardless of the rotational posture of the third member with respect to the portion, the third member can be urged against the second member with a suitable urging force so that the third member is pressed against the wire insertion portion.
  • the third member is formed of the first resin material containing at least one of the phosphorescent pigment and the fluorescent pigment, when the sensor is attached to the covered electric wire in a dark place, or in a dark place.
  • the position of the sensor can be surely and easily grasped by the light emission of the third member and the increase of the amount of light reflected by the third member. It is possible to sufficiently improve the sex. Further, since the position of the third member can be grasped reliably and easily by increasing the amount of light emission or light reflection, it is possible to grasp the third member reliably and easily and operate it accurately.
  • the senor is arranged between the electrode holding portion and the electric wire insertion portion, is fixed to the electric wire insertion portion in a state of being movable relative to the electrode holding portion in the cylinder length direction, and the electrode
  • the wire insertion part is moved relatively to the holding part in the separating direction to the predetermined position, it contacts the member contacting convex part provided on the peripheral surface of the electrode holding part to hold the electrode.
  • a fourth member for restricting relative movement of the electric wire insertion portion with respect to the portion in the separating direction.
  • the fourth member is fixed by a fixing method such as bonding or screwing. Since the fourth member can be easily fixed to the wire insertion portion, its manufacturing cost can be sufficiently reduced.
  • the electrode holding portion is provided with only one member contacting convex portion
  • the fourth member is formed in a C shape
  • the fourth member is provided with one end portion in the circumferential direction.
  • the length in the circumferential direction in the gap between the other end is equal to or longer than the length of the member abutting convex portion along the circumferential direction of the electrode holding part in the state where it is not press-fitted into the wire insertion part, and the wire insertion It is configured to be elastically deformable so as to be shorter than the length of the member contacting convex portion along the circumferential direction of the electrode holding portion in a state of being press-fitted into the portion.
  • the member holding convex portion passes through the gap between the one end portion and the other end portion of the fourth member in the circumferential direction with respect to the electrode holding portion.
  • the fourth member is moved relatively to position the fourth member closer to the base end side than the member abutting protrusion of the electrode holding part, and then the electrode holding part Inserting the electrode holding part into the wire insertion part and fixing the fourth member in the wire insertion part while rotating the fourth member so that there is no gap between the fourth members in the cylinder length direction.
  • the fourth member can be reliably and easily fixed in the electric wire insertion portion, and the member abutting convex portion can be moved to the first position when the electric wire insertion portion is relatively moved with respect to the electrode holding portion in the separating direction.
  • one end of the wire insertion portion in the cylinder length direction is opened so that the electrode holding part and the fourth member can be inserted, and the other end of the wire insertion portion in the cylinder length direction is closed.
  • the inner surface of the wire insertion portion which is opposed to the tip end surface of the electrode held by the electrode holding portion, is in line with a part of the inner edge portion of the wire insertion portion on the other end side in the cylinder radial direction.
  • a wire contact portion is provided in the wire insertion portion.
  • the insulated wire can be sandwiched between the wire insertion portion and the electrode without causing a situation in which the insulating coating is deformed or a wire breakage (disconnection of the conductor wire) occurs, Can be securely held without being damaged (the sensor can be surely attached to the covered electric wire).
  • the other end portion of the notch is such that the opening width along the circumferential direction of the electric wire insertion portion on the other end portion side of the notch becomes narrower from one end portion toward the other end portion.
  • Side is formed in an arc shape, and the wire contact portion is provided on the top of the inner edge of the notch on the other end side to form the wire insertion part, so that the covered wire inserted in the notch is securely It can be brought into contact with the electric wire contact portion.
  • the wire insertion portion is formed of the second resin material containing at least one of the phosphorescent pigment and the fluorescent pigment, when the sensor is attached to the covered wire in a dark place, or in a dark place.
  • the position of the sensor can be reliably and easily grasped by the light emission of the wire insertion part and the increase in the amount of light reflected by the wire insertion part. It is possible to sufficiently improve the sex.
  • the position of the notch where the covered electric wire should be inserted can be reliably and easily grasped by the light emission of the electric wire insertion portion and the increase in the amount of light reflected by the electric wire insertion portion, the workability of the mounting work is sufficiently improved.
  • the position of the covered electric wire inserted into the notch can be grasped reliably and easily, the workability of the detaching work can be sufficiently improved.
  • FIG. 1 It is an external appearance perspective view of the voltage sensors 1 and 1B. It is another external appearance perspective view of the voltage sensors 1 and 1B.
  • 3 is an exploded perspective view of the voltage sensor 1.
  • FIG. FIG. 6 is another exploded perspective view of the voltage sensor 1.
  • 5 is a cross-sectional view of the voltage sensor 1 in a state where the covered electric wire X is inserted into the cutout 32a of the electric wire insertion portion 4.
  • FIG. It is sectional drawing of the state which moved the electrode holding part 3 to the electric wire insertion part 4 in the direction of arrow B1 from the state shown in FIG. It is sectional drawing for demonstrating the state by which the engaging part E3 of the electrode holding part 3 and the engaging part E4 of the electric wire insertion part 4 were made to engage.
  • FIG. 8 is a cross-sectional view for explaining a state in which the electrode holding portion 3 is rotated in the direction of arrow A1 with respect to the wire insertion portion 4 from the state shown in FIG. 7. It is sectional drawing for demonstrating the state to which the electrode 2 was pressed with respect to the covered electric wire X, and the engaging parts E3 and E4 were made to engage.
  • FIG. 10 is a cross-sectional view of a state in which the tubular portion 13 of the electrode holding portion 3 is further moved in the direction of arrow B1 with respect to the wire insertion portion 4 from the state shown in FIG. 9.
  • FIG. 7 is a cross-sectional view showing a state where the operation knob 21 is moved in the direction of arrow B2 with respect to the tubular portion 13.
  • FIG. 4 is an external perspective view of the wire insertion portion 4 on the tip end side.
  • FIG. 11 is an exploded perspective view of a voltage sensor 1B according to still another embodiment. It is another exploded perspective view of the voltage sensor 1B.
  • FIG. 7 is a cross-sectional view of the voltage sensor 1B in a state in which the covered electric wire X is inserted into the cutout 32a of the electric wire insertion portion 4.
  • FIG. 7 is a cross-sectional view of the voltage sensor 1B in a state where the tubular portion 13 of the electrode holding portion 3 is moved in the direction of arrow B1 with respect to the electric wire insertion portion 4.
  • the voltage sensor 1 shown in FIGS. 1 and 2 is an example of a “sensor”, and is a coated electric wire X (example of “coated electric wire”: see FIG. 5) in which a conductive wire (core wire) is covered with an insulating coating and insulated.
  • the supplied voltage (an example of “amount to be detected for the covered electric wire”) can be detected in a non-contact state with respect to the conducting wire of the covered electric wire X.
  • the voltage sensor 1 includes an electrode 2, an electrode holding portion 3, and an electric wire insertion portion 4, is configured to be attachable to the covered electric wire X to be detected (the covered electric wire X can be inserted), and sends a signal to a measuring device (not shown). It is configured to be connectable via a cable 5.
  • the electrode 2 is an example of an “electrode”, and is formed in a columnar shape (a cylindrical shape in this example) with a conductive metal material as shown in FIG. 5, and is inserted into the wire insertion portion 4 as described later. With the tip portion 2a (tip surface S2: see FIG. 13) pressed against the covered electric wire X, the conductor wire of the covered electric wire X is capacitively coupled via the insulating coating of the covered electric wire X. As shown in FIG. 13, the electrode 2 is inserted into the holder main body 11 such that the tip 2a (tip surface S2) is exposed from the holder main body 11 of the electrode holder 3 which will be described later. As shown in FIG. 5, the signal cable 5 is connected to the base end portion 2b in the holding portion main body 11 while being integrated with the above.
  • the electrode holding part 3 is an example of an “electrode holding part” and is formed in a tubular shape (cylindrical shape in this example) as a whole. As shown in FIGS. 3 and 4, the electrode holding portion 3 includes a holding portion body 11, insulators 12a and 12b (see FIG. 5), a tubular portion 13, a coil spring 14, an operating knob 21, and a coil spring 22. I have it.
  • the holding portion main body 11 is a member that constitutes the “first member” in cooperation with the insulators 12 a and 12 b, and as an example, a cylindrical shape (cylindrical shape) through which the electrode 2 can be inserted with a conductive metal material. ) Is formed.
  • the holding portion main body 11 is formed with a convex portion 11a with which one end portion of the coil spring 14 is brought into contact with the central portion in the longitudinal direction, and the tubular portion 13 is moved with respect to the holding portion main body 11.
  • a groove 11b (see FIGS. 5, 6 and the like) into which a stopper 15 (snap ring) for restricting can be fitted is formed at a rear end portion in the longitudinal direction.
  • a groove portion such as a stopper 15 into which a snap ring or the like can be fitted is formed at a position where the convex portion 11a is formed, and a snap ring or the like is fitted into this groove portion to form a convex portion.
  • the coil spring 14 can be brought into contact with (not shown) in the same manner as 11a. It is also possible to adopt a configuration in which a convex portion such as the convex portion 11a is formed at the position where the groove portion 11b is formed and the convex portion functions similarly to the stopper 15 (not shown).
  • the convex portion 11c (which can be engaged with the slit 32c provided in the electric wire insertion portion 4 (an example of "engagement groove portion”: see FIGS. 3, 5 and 6)).
  • An example of “engagement protrusion” is provided.
  • the holding portion main body 11 of the present example is restricted from rotating relative to the wire insertion portion 4 in a state where relative movement with respect to the wire insertion portion 4 in the cylinder length direction is allowed.
  • a bush 5a for preventing the signal cable 5 from being bent is attached to the rear end portion of the holding portion main body 11.
  • the insulators 12a and 12b are formed in a cylindrical shape (cylindrical shape) so as to hold the electrode 2 with respect to the holding body 11 while insulating the electrode 2 and the holding body 11 from each other.
  • the electrode 2 in the holding part body 11 by the insulators 12a and 12b by holding the electrode 2 in the holding part body 11 by the insulators 12a and 12b, the electrode 2, the holding part body 11 and the insulator are held. 12a and 12b are integrated.
  • the tubular portion 13 is an example of a “second member”, and as shown in FIGS. 3 and 4, is formed into a tubular shape (cylindrical shape) through which the holding portion main body 11 can be inserted, and As shown in FIG. 3, the holder is mounted on the holder main body 11 in a state in which relative movement in the cylinder length direction with respect to the holder main body 11 and relative rotation with respect to the holder main body 11 are allowed.
  • a male screw 13a that can be screwed into a female screw 32b (described later) formed on the inner peripheral surface of the wire insertion portion 4 is formed on the outer peripheral surface of the tubular portion 13.
  • a groove portion 13b into which a stopper 23 (snap ring) with which one end portion of a coil spring 22 described later abuts can be fitted is formed.
  • the female screw 32b of the wire insertion portion 4 and the male screw 13a of the tubular portion 13 are combined to form a “screw portion” (“the outer peripheral surface of the electrode holding portion”).
  • the inner peripheral surface of the wire insertion portion, the outer peripheral surface of the wire insertion portion or the inner peripheral surface of the electrode holding portion” is the "outer peripheral surface of the electrode holding portion and the inner peripheral surface of the wire holding portion” Example).
  • the tubular portion 13 is relatively moved along the tube length direction, and the holding portion main body 11 and the electrode 2 are moved together with the tubular portion 13 with respect to the wire insertion portion 4.
  • the approaching direction in which the electrode 2 approaches the covered electric wire X inserted in 4 (direction of arrow B1 in each figure)
  • the separating direction in which the electrode 2 is separated from the covered electric wire X (direction of arrow B2 in each figure). It is possible to move the electrode 2.
  • the outer diameter of the portion where the male screw 13a is formed has the female screw 32b formed in the wire insertion portion 4.
  • the outer diameter of the other portion is formed so as to be approximately the same as the inner diameter of the portion (so that the male screw 13a can be screwed into the female screw 32b).
  • the outer diameter is smaller than the outer diameter.
  • the inner diameter of the portion other than the portion where the male screw 13a is formed is about the same as the outer diameter of the holding portion main body 11 (slightly larger diameter). And the inner diameter of the portion where the male screw 13a is formed is larger than the outer diameter of the holding portion main body 11 so that the coil spring 14 can be inserted.
  • a step portion is formed between the portion where the male screw 13a is formed on the inner peripheral surface and the other portion, and as described later, the step portion of the inner peripheral surface is formed. One end of the coil spring 14 is brought into contact with.
  • the coil spring 14 is an example of a “coil spring” as a “first urging member”, and as shown in FIGS. 5 and 6, one end abuts on the convex portion 11 a of the holding portion main body 11 and the other end.
  • the portion is disposed between the holding portion main body 11 and the tubular portion 13 so that the portion abuts on the stepped portion of the inner peripheral surface of the tubular portion 13 mounted on the holding portion main body 11 (" "Is arranged together with one member"), and the elastic restoring force (urging force in the extension direction) causes the holding portion main body 11 to "approach the direction (direction of arrow B1)" with respect to the tubular portion 13. Energize.
  • the operation knob 21 is an example of a “third member”, and as shown in FIGS. 3 and 4, is formed in a tubular shape (cylindrical shape) through which the tubular portion 13 can be inserted, and the tubular portion 13 It is mounted on the tubular portion 13 in a state where relative movement with respect to the tubular portion 13 is allowed and rotation relative to the tubular portion 13 is restricted.
  • a resin material containing a phosphorescent pigment for example, a resin material obtained by containing a phosphorescent pigment in a polyacetal (polyoxymethylene) resin or a polypropylene resin: “first resin material”.
  • first resin material for example, a resin material obtained by containing a phosphorescent pigment in a polyacetal (polyoxymethylene) resin or a polypropylene resin: “first resin material”.
  • This operation knob 21 is attached to the electric wire insertion portion 4 and the holding portion main body 11 when the voltage sensor 1 is attached to the covered electric wire X and when the voltage sensor 1 is removed from the covered electric wire X, as will be described later. It functions as an operating member for relatively rotating the shaped portion 13, and when the voltage sensor 1 is attached to the covered electric wire X, it is tubular with respect to the electric wire insertion portion 4 and the holding portion main body 11. It functions as a rotation restricting member for restricting relative rotation of the portion 13.
  • a convex portion 21a having an inner diameter capable of contacting a step portion of the outer peripheral surface of the tubular portion 13 is formed on the inner peripheral surface, and
  • the inner shape (opening shape) in the formation portion of the convex portion 21a is formed in a non-circular shape having the same shape as the outer shape of the portion other than the formation portion of the male screw 13a in the tubular portion 13, whereby the tubular portion 13 is formed.
  • the rotation relative to is restricted.
  • a contact portion F3 an end surface on the tip end side: an example of a “holding portion side contact portion” of the operation knob 21 that is brought into contact with the wire insertion portion 4 is provided.
  • an engaging portion provided in an abutting portion F4 (an end surface on the rear end side: an example of an "inserting portion side abutting portion") that is brought into contact with the operation knob 21 in the electric wire inserting portion 4 as described later.
  • An engaging portion E3 (an example of a "holding portion side engaging portion") capable of engaging with E4 (an example of an "inserting portion side engaging portion") is provided.
  • the coil spring 22 is an example of a “coil spring” as a “second urging member”, and as shown in FIGS. 5 and 6, one end of the coil spring 22 is a protrusion of the operation knob 21 mounted on the tubular portion 13. It is arranged between the tubular portion 13 and the operating knob 21 so as to come into contact with the portion 21a and the other end thereof to come into contact with the stopper 23 fitted in the groove portion 13b of the tubular portion 13 (“in the third member Is disposed with the second member in the direction "), and the elastic restoring force (biasing force in the extending direction) causes the operating knob 21 to move toward the tubular portion 13 in the "approaching direction (direction of arrow B1)". ).
  • the electric wire insertion portion 4 is an example of an “electric wire insertion portion”, and as shown in FIGS. 3 to 6, for example, is formed of stainless steel into a tubular shape (cylindrical shape in this example).
  • the electric wire insertion portion 4 can be fitted with the electrode holding portion 3 by opening the base end portion of the tubular portion 31 forming the "peripheral wall" (an example of a configuration in which "one end portion in the tubular length direction is opened"). And the distal end of the tubular portion 31 is closed (an example of a configuration in which "the other end in the tubular length direction is closed").
  • the wire insertion portion 4 is provided with a notch 32 a (an example of “notch”) having an L shape in a side view formed by notching a part of the tubular portion 31, and covers the notch 32 a.
  • the electric wire X can be inserted.
  • the electric wire on the tip side of the notch 32a (“the other end side of the electric wire insertion portion”: the left side in the figure).
  • the opening width along the circumferential direction of the insertion portion 4 becomes narrower from the base end portion toward the tip end portion (“from one end to the other end of the wire insertion portion”).
  • An example of the configuration "to be narrower" The tip end side of the notch 32a is formed in an arc shape.
  • the inner surface of the wire insertion portion 4 has a facing surface S4 that faces the tip surface S2 of the electrode 2 held by the electrode holding portion 3.
  • the insertion portion 4 is formed so as to be linearly continuous with a part of the inner edge portion on the tip end side of the notch 32a in the cylinder radial direction (in this example, the facing surface S4 is an inner edge portion of the notch 32a in a side view). Is formed so as to be in tangent with the electric wire contact portion Px in which the covered electric wire X inserted into the notch 32a comes into linear contact with the electric wire insertion portion 4 along the radial direction. In this case, in the wire insertion portion 4, the wire contact portion Px is provided at the top Pp on the tip end side of the inner edge of the notch 32a.
  • a female screw 32b forming a "screw portion” in combination with the male screw 13a formed on the outer peripheral surface of the tubular portion 13 as described above is formed,
  • the male screw 13a of the electrode holding portion 3 (cylindrical portion 13) can be screwed.
  • the “screw portion” formed by the male screw 13a of the tubular portion 13 of the electrode holding portion 3 and the female screw 32b of the wire insertion portion 4 (the tubular portion 31) is positive. It consists of screws.
  • the direction of the arrow A1 that rotates the tubular portion 13 with respect to the wire insertion portion 4 corresponds to the “rotation direction when approaching”, and
  • the direction of the arrow A2 that rotates the tubular portion 13 with respect to the wire insertion portion 4 corresponds to the "separation rotation direction”.
  • the direction of the arrow A2 corresponds to the "approaching rotation direction”.
  • the direction of arrow A1 corresponds to the "rotation direction during separation”.
  • the cylindrical portion 31 is provided with the slit 32c with which the convex portion 11c provided on the holding portion main body 11 can be engaged as described above.
  • the "engagement groove portion" is provided in the "first member".
  • the electrode holding portion 3 is brought into contact with the contact portion F4 (end surface on the rear end side: “insertion portion side contact”).
  • An example of the "contact portion” is an engagement portion E4 ("" which is engageable with the engagement portion E3 provided in the contact portion F3 which is brought into contact with the wire insertion portion 4 in the electrode holding portion 3 as described above. (Example of "insertion portion side engaging portion”) is provided.
  • the engaging portions E4 of the electric wire insertion portion 4 are formed along the circumferential direction of the electric wire insertion portion 4 into a plurality of contact portions F4 at equal intervals. It is configured to include a convex portion C4a (an example of an "insertion portion side convex portion"). Further, the engaging portions E3 of the operation knob 21 of the electrode holding portion 3 are respectively engaged with the concave portions C4b (an example of “insertion portion side concave portions”) between the convex portions C4a adjacent to each other in the circumferential direction of the electric wire insertion portion 4.
  • a plurality of convex portions C3a (an example of "holding portion side convex portion") formed at equal intervals along the circumferential direction of the tubular portion 13 in the contact portion F3 as possible, and adjacent convex portions C3a in the circumferential direction.
  • the convex portions C4a are configured to be respectively engageable with the concave portions C3b (an example of "holding portion side concave portions") between them.
  • the engaging portions E3 and E4 are engaged with each other, whereby the relative rotation of the operating knob 21 with respect to the wire insertion portion 4 is restricted, and the engaging portions E3 and E3.
  • the engagement of E4 is released, the relative rotation of the operation knob 21 with respect to the electric wire insertion portion 4 is allowed.
  • the engaging portions E3, E4 are engaged with each other (that is, the convex portions C3a, C3a... Of the engaging portion E3 are the concave portions C4b, C4b of the engaging portion E4. .. while the projections C4a, C4a of the engaging portion E4 are fitted into the concave portions C3b, C3b of the engaging portion E3, as shown in FIG. , The engaging portions E3, E4 are disengaged (that is, the convex portions C3a, C3a... Of the engaging portion E3 are released from the concave portions C4b, C4b. The tops of the protrusions C3a, C3a...
  • the holding portion main body 11 is provided.
  • the holding portion main body 11 is rotated with respect to the electric wire insertion portion 4 in accordance with the rotation of the tubular portion 13 with respect to the electric wire insertion portion 4, so that the holding portion main body 11 is in the “approaching direction (arrow B1 in each figure).
  • the “third distance (distance L3)” along the direction of arrow A1 between the top of the protrusion C3a located on the side of and the bottom of the recess C3b between the adjacent protrusions C3a and C3a is “the third distance (distance L3)”.
  • the second distance (distance L2) and the “rotating direction when approaching (arrow A1)” of the convex portions C3a, C3a that are adjacent to each other in the circumferential direction of the electrode holding portion 3 (direction of arrows A1, A2).
  • Direction the top of the protrusion C3a located on the side of the “rotation direction during separation (direction of arrow A2)", and the bottom of the recess C3b between the adjacent protrusions C3a, C3a.
  • the protrusions C3a, C3a,... Are attached to the operating knob 21 so that the "fourth distance (distance L4)" along the direction of the arrow A2 becomes equal to the "first distance (distance L1)". It is formed on the contact portion F3.
  • the male screw 13a of the tubular portion 13 is screwed into the female screw 32b of the wire insertion portion 4 (the tubular portion 31), and the elasticity of the coil spring 22 is increased.
  • the operation knob 21 is biased in the “approaching direction (direction of arrow B1)” with respect to the tubular portion 13 by the restoring force (biasing force in the extension direction).
  • the operating knob 21 is rotated with respect to the wire insertion portion 4 in the direction of the arrow A1 with the engagement portions E3 and E4 engaged.
  • the operation knob 21 by moving the operation knob 21 in the direction of the arrow B2 by the distance L5, the force required to release the engagement of the engagement portion E3 with the engagement portion E4 (the wire insertion so that the engagement is released)
  • the step portion is formed between the portion on the outer peripheral surface of the cylindrical portion 13 where the male screw 13a is formed and the other portion.
  • the convex portion 21a of the operating knob 21 comes into contact with the upper end of the operating knob 21 to restrict the movement of the operating knob 21 with respect to the tubular portion 13 in the direction of the arrow B1.
  • the electrode 2 held by the electrode holding portion 3 does not come into contact with the insulating coating of the covered electric wire X inserted into the electric wire insertion portion 4.
  • the tip end portion of the electrode 2 and the peripheral surface of the holding portion main body 11 on the tip end portion side of the electric wire insertion portion 4 are formed.
  • the tip end of the electrode 2 or the holding portion main body 11 is housed in the tubular portion 31 of the wire insertion portion 4.
  • the operation knob 21 is rotated with respect to the wire insertion portion 4 in the direction of arrow A2.
  • the engagement portion E4 of the wire insertion portion 4 engages with the electrode holding portion 3 (operation knob 21). Since the joint portion E3 is engaged and the rotation of the operation knob 21 with respect to the electric wire insertion portion 4 is restricted, an operation of releasing the engagement of the engaging portions E3, E4 is required. Will be described in detail later.
  • the operation knob 21 is formed of the resin material containing the phosphorescent pigment. As a result, even if the work place is dark, the position of the operating knob 21 can be reliably and easily grasped by the light emission of the operating knob 21. As a result, the operating knob 21 can be reliably and easily gripped.
  • the voltage sensor 1 is moved with respect to the covered electric wire X so that the covered electric wire X is inserted in the notch 32a of the electric wire insertion portion 4.
  • the installation location of the covered electric wire X is dark, it becomes difficult to visually recognize the voltage sensor 1 (recognize the position of the voltage sensor 1), and the voltage sensor 1 is installed so that the covered electric wire X is inserted into the notch 32a. It may be difficult to move.
  • the position of the voltage sensor 1 can be reliably and easily grasped by the light emission of the operation knob 21, so that the cutout 32a is provided.
  • the voltage sensor 1 can be reliably and easily moved so that the covered electric wire X is inserted.
  • the electrode 2 is brought into contact with the insulating coating of the covered electric wire X to capacitively couple the electrode 2 with the conducting wire of the covered electric wire X.
  • the operation knob 21 is rotated with respect to the electric wire insertion portion 4 in the direction of arrow A1.
  • the step portion provided on the outer peripheral surface of the tubular portion 13 functions as a “movement restricting portion”, and the convex portion 21a of the operation knob 21 is brought into contact with this step portion.
  • the contact portion F3 of the electrode holding portion 3 (operation knob 21) is separated from the contact portion F4 of the wire insertion portion 4 (that is, the engagement portion E3 is disengaged from the engagement portion E4). ), the operation knob 21 can be smoothly rotated with respect to the wire insertion portion 4.
  • the tubular portion 13 is rotated together with the operation knob 21 in the direction of arrow A1 with respect to the electric wire insertion portion 4.
  • the cylindrical portion 13 in which the male screw 13a is screwed into the female screw 32b is moved in the direction of arrow B1 with respect to the wire insertion portion 4, and
  • the electrode 2 integrated with the holder main body 11 is connected to the electric wire. It is moved in the direction of arrow B1 with respect to the insertion portion 4.
  • the contact portion F3 of the electrode holding portion 3 (operation knob 21) (the projection end of each protrusion C3a in the engagement portion E3) is contacted with the contact portion F4 of the wire insertion portion 4 (each protrusion in the engagement portion E4). It is in contact with the tip of C4a).
  • the convex portion C3a of the engaging portion E3 enters the concave portion C4b of the engaging portion E4, and the convex portion C4a of the engaging portion E4 enters the concave portion C3b of the engaging portion E3 into the wire insertion portion 4.
  • the operation knob 21 is biased by the coil spring 22 in the direction of arrow B2 with respect to the wire insertion portion 4 depending on the amount of penetration of the protrusions C3a and C4a. It is necessary to move against. Therefore, as the degree of engagement of the engaging portions E3, E4 increases, the force required to rotate the operation knob 21 with respect to the wire insertion portion 4 gradually increases (the operation resistance increases. Gradually increases).
  • the operation knob 21 is rotated in the direction of the arrow A1 with respect to the wire insertion portion 4 in the state where the engagement portions E3 and E4 are engaged.
  • the force required to rotate in the direction of arrow A2 is larger than the force required to rotate (in other words, the force required to rotate in the direction of arrow A2 is greater than the force required to rotate in the direction of arrow A2.
  • Engaging portions E3 and E4 are formed so that the required force is small. Therefore, it is possible to rotate the operation knob 21 in the direction of the arrow A1 with respect to the electric wire insertion portion 4 without applying such a large operation force.
  • tubular portion 13 is further moved in the direction of arrow B1 with respect to the wire insertion portion 4 as the operation knob 21 is rotated in the direction of arrow A1 with respect to the wire insertion portion 4 as described above.
  • the electrode 2 is moved in the direction of the arrow B1 together with the holding portion main body 11 and the tubular portion 13, so that the electrode 2 is in contact with the insulating coating of the covered electric wire X, as shown in FIG.
  • the electrode 2 is further moved in the direction of arrow B1 with respect to the wire insertion portion 4. Then, the tip portion 2a of the electrode 2 is pressed against the covered electric wire X with a sufficient pressing force.
  • the tubular portion 13 moves in the direction of arrow B1 as the operation knob 21 rotates in the direction of arrow A2 from the state where the electrode 2 is in contact with the insulating coating of the coated electric wire X.
  • the coil spring biases the holding portion main body 11 in the direction of arrow B1 with respect to the tubular portion 13 as the pressing force of the electrode 2 against the covered electric wire X in the direction of arrow B1 increases.
  • 14 is gradually shortened.
  • the holding portion main body 11 integrated with the electrode 2 is relatively retracted in the direction of the arrow B2 with respect to the tubular portion 13, and as a result, the electrode 2 exerts an excessively large force on the covered electric wire X.
  • a pressed state is preferably avoided.
  • the facing surface S4 on the inner surface of the wire insertion portion 4 is aligned with a part of the inner edge portion on the tip end side of the notch 32a in the cylinder radial direction of the wire insertion portion 4.
  • the electric wire insertion portion 4 is provided with an electric wire contact portion Px.
  • the covered electric wire X can be sandwiched between the electric wire insertion portion 4 and the electrode 2 without causing a situation in which the covering is deformed or breakage (disconnection of the conducting wire) occurs.
  • the electrode 2 is capacitively coupled to the conductor of the covered electric wire X in a suitable state, and the mounting of the voltage sensor 1 on the covered electric wire X is completed.
  • the measurement process is started by operating the operation unit (not shown) of the measuring device. Since a method of measuring voltage using this type of sensor is known to those skilled in the art, detailed description thereof will be omitted.
  • the voltage sensor 1 and the covered electric wire X increase in temperature when the measurement process is performed.
  • the respective parts and the covered electric wire X are thermally expanded, and the insulating coating formed of the resin material is softened and easily deformed.
  • each part of the voltage sensor 1 and the covered electric wire X are accompanied by the temperature decrease of the voltage sensor 1 and the covered electric wire X. Contracts.
  • the holding portion main body 11 Since the holding portion main body 11 is moved relative to the tubular portion 13 in the direction of arrow B1, the holding portion main body 11 holds the covered electric wire X inserted in the electric wire insertion portion 4.
  • the state in which the tip 2a of the electrode 2 is pressed against the covered electric wire X in the direction of the arrow B1 is preferably maintained.
  • the tip 2a of the existing electrode 2 is preferably prevented from being pressed by an excessively strong force in the direction of arrow B1.
  • the coil is attached to the tubular portion 13 screwed into the electric wire insertion portion 4. Since the holding portion main body 11 biased by the spring 14 is moved relative to the tubular portion 13 in the direction of the arrow B1, the holding electric wire X is held with respect to the covered electric wire X inserted in the electric wire insertion portion 4. The state in which the electrode 2 held by the part main body 11 is pressed against the covered electric wire X with a suitable pressing force in the direction of the arrow B1 is maintained.
  • the above-mentioned voltage sensor disclosed by the applicant is provided with a lock nut that regulates relative rotation of the wire insertion portion with respect to the electrode holding portion.
  • the coefficient of thermal expansion of the wire insertion part and the lock nut is higher than that of the electrode holding part depending on the combination of the materials forming each part of the voltage sensor (the difference in the coefficient of thermal expansion of each member).
  • the cylindrical shape is applied to the electric wire insertion portion 4.
  • the contact portion F3 of the operating knob 21 for rotating the portion 13 is brought into contact with the contact portion F4 of the electric wire insertion portion 4, and the contact portion F4 is formed with respect to the engaging portion E4.
  • the engagement portion E3 formed in the contact portion F3 being engaged, the relative rotation of the operation knob 21 with respect to the electric wire insertion portion 4 is restricted.
  • the relative rotation of the tubular portion 13 with respect to the wire insertion portion 4 is restricted, and the relative movement of the voltage sensor 1 with respect to the wire insertion portion 4 in the direction of the arrow B2 is prevented. It is regulated appropriately. As a result, in the voltage sensor 1 of this example, the state in which the electrode 2 held by the holding portion main body 11 is pressed against the covered electric wire X in the direction of the arrow B1 with a suitable pressing force is maintained.
  • the operating knob 21 is in a state in which it is difficult to rotate. Therefore, even if vibration is applied to the voltage sensor 1 during the measurement process or the temperature of the measurement environment changes and each part of the voltage sensor 1 thermally expands or contracts, the operation knob 21 for the wire insertion part 4 does not move.
  • the electrode 2 Without causing a gap between the tip of the wire and the covered electric wire X (insulating coating), between the edge of the notch 32a and the covered electric wire X (insulating coating), or causing a break in the covered electric wire X.
  • the state in which the electrode 2 is pressed against the covered electric wire X with a suitable pressing force can be maintained.
  • the state in which the electrode 2 is capacitively coupled to the conducting wire of the covered electric wire X is preferably maintained (a situation in which the degree of capacitive coupling is changed is avoided), so that the voltage It is possible to sufficiently improve the detection accuracy of.
  • the voltage sensor 1 is removed from the covered electric wire X.
  • the place where the voltage sensor 1 is attached to the covered electric wire X is dark, it is difficult to find the voltage sensor 1 to be removed (the position on the covered electric wire X where the voltage sensor 1 is attached) is difficult to find. There is a risk.
  • the operation knob 21 is formed of the resin material containing the phosphorescent pigment. Accordingly, even if the mounting location of the voltage sensor 1 is dark, the voltage sensor 1 can be reliably and easily found (the mounting position of the voltage sensor 1 can be grasped reliably and easily) by the light emission of the operation knob 21.
  • the operation knob 21 is pushed against the urging force of the coil spring 22 with respect to the tubular portion 13 screwed into the wire insertion portion 4. It is moved in the direction of arrow B2 (an example of the above-mentioned “release operation”). As a result, the engagement portions E3 and E4 are disengaged, and the rotation regulation of the operation knob 21 and the tubular portion 13 with respect to the electric wire insertion portion 4 is released. At this time, it may be difficult to grasp the position of the operation knob 21 when the mounting location of the voltage sensor 1 on the covered electric wire X is dark.
  • the voltage sensor 1 of the present example even if the mounting location of the voltage sensor 1 is dark, its position can be reliably and easily grasped by the light emission of the operating knob 21, so that the operating knob 21 can be securely and easily operated. You can grab it.
  • the operation knob 21 is rotated in the direction of arrow A2 with respect to the wire insertion portion 4.
  • the tubular portion 13 is rotated together with the operation knob 21 in the direction of arrow A2 with respect to the wire insertion portion 4.
  • the tubular portion 13 in which the male screw 13a is screwed into the female screw 32b is moved in the direction of arrow B2 with respect to the wire insertion portion 4, and the tubular portion 13 is attached.
  • the electrode 2 integrated with the holding portion main body 11 is indicated by the arrow B2 with respect to the electric wire insertion portion 4. Can be moved in the direction.
  • the electrode 2 is separated from the covered electric wire X (insulating coating) as shown in FIG. 6 by sufficiently rotating the operation knob 21 in the direction of arrow A2 with respect to the electric wire insertion portion 4. Further, by further rotating the operation knob 21 in the direction of the arrow A2 with respect to the electric wire insertion portion 4, the tip ends of the electrode 2 and the holding portion main body 11 are the tubes of the electric wire insertion portion 4 as shown in FIG. It will be in the state accommodated in the shape part 31. In such a state, the covered electric wire X and/or the voltage sensor 1 is moved so that the covered electric wire X in the notch 32a is located outside the electric wire insertion portion 4. With the above, the removal of the voltage sensor 1 from the covered electric wire X is completed.
  • the electrode holding portion 3 that holds the electrode 2 is formed into a tubular shape through which the electrode 2 can be inserted and integrated with the electrode 2, and in the tubular length direction with respect to the wire insertion portion 4.
  • the relative rotation of which is restricted with respect to the wire insertion portion 4 in a state where the relative movement of the holder body 11 is allowed, and the holder body 11 is formed into a tubular shape.
  • a male screw 13a that can be screwed into the female screw 32b provided in the wire insertion portion 4 is formed, and the relative movement in the cylinder length direction with respect to the holding portion main body 11 and the relative movement with respect to the holding portion main body 11 are performed.
  • the voltage sensor 1 when the voltage is detected in a temperature environment different from that when the voltage sensor 1 is attached to the covered electric wire X, thermal expansion and contraction of each part of the voltage sensor 1 and the covered electric wire X due to a temperature change. Even if the insulation coating of the covered electric wire X is softened, the holding portion main body 11 is urged by the coil spring 14 in the direction of arrow B1 with respect to the tubular portion 13, so that the holding portion main body 11 It is possible to maintain the state in which the electrode 2 held by is pressed against the covered electric wire X with a suitable pressing force.
  • the state in which the electrode 2 is capacitively coupled to the conducting wire of the covered electric wire X can be maintained, so that the voltage applied to the covered electric wire X can be suitably detected.
  • the tubular portion 13 operation knob 21
  • the tubular portion 13 is excessively rotated in the direction of the arrow A1 with respect to the electric wire insertion portion 4 in which the covered electric wire X is inserted in the notch 32a, and the electric wire insertion portion 4 is moved.
  • the tubular portion 13 is moved too much in the direction of the arrow B1
  • the holding portion main body 11 moves relatively to the tubular portion 13 in the direction of the arrow B2 against the biasing force of the coil spring 14. Therefore, it is possible to prevent the electrode 2 held by the holding portion main body 11 from being pressed against the covered electric wire X with an excessively strong pressing force. As a result, the voltage can be detected without causing breakage of the covered electric wire X and the like.
  • the "first biasing member” (the coil spring 14 in this example) is configured by the coil spring that can be inserted into the holding portion main body 11, so that the “first biasing member” is obtained.
  • the holding portion main body 11 is biased against the tubular portion 13 with a suitable biasing force.
  • the electrode holding portion 3 is formed in a tubular shape that can be inserted through the tubular portion 13, and is allowed to move relative to the tubular portion 13 in the tubular length direction, and
  • the operation knob 21 mounted on the tubular portion 13 in a state in which the relative rotation with respect to the tubular portion 13 is restricted, and the operating knob 21 with respect to the tubular portion 13 is “approaching direction (direction of arrow B1)”.
  • a coil spring 22 for urging the contact portion F4 of the wire insertion portion 4 to be provided with an engaging portion E4, and the engaging portion E3 of the operating knob 21 can be engaged with the engaging portion E4.
  • the engaging portion E3 is provided, and the engaging knobs E3 and E4 are engaged with each other, so that the relative rotation of the operation knob 21 with respect to the wire insertion portion 4 is restricted.
  • the operation knob 21 is moved in the direction of the arrow B2 against the biasing force of the coil spring 22. Unless moved, the engaging portions E3 and E4 are maintained in the engaged state, and the rotation of the operation knob 21 with respect to the wire insertion portion 4, that is, the rotation of the tubular portion 13 with respect to the wire insertion portion 4 is restricted. The state is maintained. This avoids a situation in which the holding portion main body 11 and the electrode 2 move in the direction of arrow B2 with respect to the wire insertion portion 4 due to unintentional rotation of the tubular portion 13 with respect to the wire insertion portion 4, and the covered electric wire is prevented.
  • the state in which the electrode 2 is pressed against X can be preferably maintained.
  • the "second biasing member (in this example, the coil spring 22)" is configured by the coil spring that can insert the tubular portion 13, so that the “second biasing member” is obtained.
  • the operation knob 21 is biased against the tubular portion 13 with a suitable biasing force.
  • the operation knob 21 can be pressed against the wire insertion portion 4.
  • the “fourth distance (distance L4)” along the “rotation direction during separation (direction of arrow A2)” from the bottom of the recess C3b is equal to the “first distance (distance L1)”.
  • the convex portions C3a, C3a... Are formed.
  • the operation knob 21 for the electric wire insertion portion 4 in the direction of the arrow A1 can be rotated with a small force, and conversely, the operation knob 21 for the electric wire insertion portion 4 in the direction of the arrow A2 can be performed. Since a large force is required for the turning operation of the electric wire, the turning operation of the operation knob 21 with respect to the electric wire insertion portion 4 in the direction of pressing the electrode 2 against the electric wire X can be easily performed, and the electric wire X can be easily rotated. The unintended rotation of the operation knob 21 with respect to the electric wire insertion portion 4 in the direction in which the electrode 2 pressed against the electric wire is separated from the covered electric wire X can be suitably maintained.
  • this voltage sensor 1 when the holding portion main body 11 and the insulators 12a and 12b are located in the "non-contact position", the “approach direction (arrow B1 "Direction of movement"), and the contact portion F4 is separated from the contact portion F4 by providing a "movement restriction portion (in this example, a step portion on the outer peripheral side)" in the tubular portion 13.
  • a "movement restriction portion in this example, a step portion on the outer peripheral side
  • the operation knob 21 can be rotated with respect to the portion 4, the operation knob 21 can be easily rotated, and when the electrode 2 is sufficiently close to the covered electric wire X, and when the electrode 2 Is pressed against the covered electric wire X, the engaging portions E3 and E4 are engaged, so that unintentional rotation of the operating knob 21 with respect to the tubular portion 13 is preferably restricted. can do.
  • one end portion in the “cylinder length direction” of the wire insertion portion 4 is opened so that the electrode holding portion 3 and the stopper 6 can be inserted, and the other end of the wire insertion portion 4 in the “cylinder length direction”.
  • the portion is closed, and the facing surface S4 facing the tip end surface S2 of the electrode held by the electrode holding portion 3 on the inner surface of the wire insertion portion 4 has the other end in the notch 32a in the tube radial direction of the wire insertion portion 4.
  • the electric wire contact portion Px is provided in the electric wire insertion portion 4 so as to be linearly continuous with a part of the inner edge portion on the side of the portion.
  • the elasticity of the covered electric wire X is reduced.
  • a state in which the covered electric wire X is sandwiched between the electric wire insertion portion 4 and the electrode 2 without causing a situation in which the insulation coating is deformed to a degree that makes it difficult to restore or breakage (disconnection of the conductive wire) occurs. Therefore, the covered electric wire X can be securely held without being damaged (the voltage sensor 1 can be reliably attached to the covered electric wire X).
  • the notch 32a is formed such that the opening width along the “circumferential direction” of the wire insertion portion 4 on the other end side becomes narrower from one end to the other end.
  • the operation knob 21 is formed of the “first resin material” containing the phosphorescent pigment, when the voltage sensor 1 is attached to the covered electric wire X in a dark place, or in a dark place. At the time of removing the voltage sensor 1 from the covered electric wire X, since the position of the voltage sensor 1 can be reliably and easily grasped by the light emission of the operation knob 21, the workability of the mounting work and the removing work is sufficiently improved. be able to. Further, since the position of the operation knob 21 can be reliably and easily grasped by the light emission, the operation knob 21 can be reliably and easily grasped and operated accurately.
  • the configuration of the “sensor” is not limited to the above example of the configuration of the voltage sensor 1.
  • the configuration of the voltage sensor 1 including the operation knob 21 formed of a resin material containing a phosphorescent pigment as the “third member” has been described as an example, but instead of the phosphorescent pigment (or in the phosphorescent pigment,
  • the operation knob 21 (third member) can be formed of a resin material containing a fluorescent pigment (another example of the “first resin material”).
  • the “sensor” including the operation knob 21 formed of the resin material containing the fluorescent pigment is compared with the structure in which the operation knob 21 is formed of the resin material not containing the fluorescent pigment.
  • the voltage sensor 1 is attached to the covered electric wire X in a dark place or when the voltage sensor 1 is removed from the covered electric wire X in a dark place, the amount of light reflected by the operation knob 21 increases and the position of the voltage sensor 1 is changed. Since it can be grasped reliably and easily, the workability of the mounting work and the removing work can be sufficiently improved. Further, since the position of the operation knob 21 can be reliably and easily grasped by the increase in the reflection amount of light, the operation knob 21 can be reliably and easily grasped and operated accurately.
  • the engaging portion E3 of the wire insertion portion 4 is provided with the engaging portion E3, and the operating knob 21 having the engaging portion E3 of the abutting portion F3 is attached to the tubular portion 13 and operated by the coil spring 22.
  • the voltage sensor 1A shown in FIG. 12 is another example of the “sensor”, and instead of the electrode holding part 3 and the wire insertion part 4 in the voltage sensor 1, a “electrode holding part” is used. It is configured to include an electrode holding portion 3A which is another example and an "electric wire insertion portion 4A" which is another example of the "electric wire insertion portion".
  • the same components as those of the voltage sensor 1 are designated by the same reference numerals, and duplicate description will be omitted.
  • the electric wire insertion portion 4A is configured similarly to the electric wire insertion portion 4 of the voltage sensor 1 except that the engagement portion E3 is not formed, for example.
  • the electrode holding portion 3A does not include members corresponding to the operation knob 21 and the coil spring 22 in the electrode holding portion 3 of the voltage sensor 1, and instead of the tubular portion 13 of the electrode holding portion 3, a tubular shape.
  • the electrode holding unit 3 is configured similarly to the electrode holding unit 3 except that the electrode holding unit 3 is provided.
  • the tubular portion 43 is another example of the “second member”, in which the male screw 13a is formed on one end side of the outer peripheral surface and the operation portion 43a is formed on the other end side.
  • the tubular portion 43 is provided with a step portion on the inner peripheral surface thereof, which is engageable with the other end portion of the coil spring 14 in the same manner as the step portion provided on the inner peripheral surface of the tubular portion 13. ..
  • this voltage sensor 1A in the same manner as the voltage sensor 1 described above, when detecting the voltage under a temperature environment different from the time when the voltage sensor 1A is attached to the covered electric wire X, each part of the voltage sensor 1A and the covered electric wire X are detected. Even if thermal expansion or contraction occurs due to temperature change or the insulating coating of the covered electric wire X softens, the coil spring 14 urges the holding portion main body 11 in the direction of arrow B1 with respect to the tubular portion 43. Therefore, it is possible to maintain the state in which the electrode 2 held by the holding portion main body 11 is pressed against the covered electric wire X with a suitable pressing force.
  • the state in which the electrode 2 is capacitively coupled to the conducting wire of the covered electric wire X can be maintained, so that the voltage applied to the covered electric wire X can be suitably detected.
  • the tubular portion 43 is excessively rotated in the direction of arrow A1 with respect to the electric wire insertion portion 4A in which the covered electric wire X is inserted in the notch 32a, and the tubular portion 43 is moved to the electric wire insertion portion 4.
  • the holding part main body 11 moves relatively to the tubular part 43 in the direction of arrow B2 against the biasing force of the coil spring 14, so that the holding part main body 11 does not move. It is possible to avoid that the electrode 2 held by is pressed against the covered electric wire X by an excessively strong pressing force. As a result, the voltage can be detected without causing breakage of the covered electric wire X and the like.
  • a resin material containing at least one of a phosphorescent pigment and a fluorescent pigment for example, a polyacetal (polyoxymethylene) resin, a polypropylene resin, or the like is used as the phosphorescent pigment and A resin material containing at least one of fluorescent pigments: an example of a "first resin material" to form a tubular portion 43, and thus is formed of a resin material containing at least one of a phosphorescent pigment and a fluorescent pigment.
  • a resin material containing at least one of a phosphorescent pigment and a fluorescent pigment for example, a polyacetal (polyoxymethylene) resin, a polypropylene resin, or the like is used as the phosphorescent pigment and A resin material containing at least one of fluorescent pigments: an example of a "first resin material"
  • a resin material containing at least one of a phosphorescent pigment and a fluorescent pigment and a conductive filler (a resin material having conductivity: As an example, a resin material in which a polyacetal (polyoxymethylene) resin or a polypropylene resin contains at least one of a phosphorescent pigment and a fluorescent pigment and a conductive filler: an example of a “second resin material”)
  • a resin material containing at least one of a phosphorescent pigment and a fluorescent pigment and a conductive filler having conductivity
  • Resin material As an example, a resin material in which a polyacetal (polyoxymethylene) resin, a polypropylene resin, or the like contains at least one of a phosphorescent pigment and a fluorescent pigment and a conductive filler: an example of a "second resin material”
  • the voltage sensor 1, 1A when the voltage sensor 1, 1A is attached to the covered electric wire X as described above, if the installation location of the covered electric wire X is dark, the voltage sensor 1, 1A is visually recognized (the position of the voltage sensor 1, 1A itself). , And the positions of the wire insertion portions 4 and 4A in the voltage sensors 1 and 1A) are difficult to grasp, and the covered wire X is inserted into the notches 32a formed in the wire insertion portions 4 and 4A. It may be difficult to move the voltage sensor 1 to the next.
  • the wire insertion portions 4 and 4A by forming the wire insertion portions 4 and 4A with the resin material containing at least one of the phosphorescent pigment and the fluorescent pigment, it is possible to reduce the amount of light emitted from the wire insertion portions 4 and 4A and the amount of light reflected by the wire insertion portions 4 and 4A. Due to the increase, the positions of the voltage sensors 1 and 1A themselves and the positions of the wire insertion portions 4 and 4A (the positions of the notches 32a) in the voltage sensors 1 and 1A can be grasped reliably and easily.
  • the wire insertion portions 4 and 4A with the resin material containing at least one of the phosphorescent pigment and the fluorescent pigment, it is possible to reduce the amount of light emitted from the wire insertion portions 4 and 4A and the amount of light reflected by the wire insertion portions 4 and 4A.
  • the positions of the wire insertion portions 4 and 4A (the positions of the cutouts 32a) can be grasped reliably and easily, and as a result, the position of the covered electric wire X inserted into the cutouts 32a can also be reliably and easily obtained. It is possible to grasp easily.
  • the voltage applied to the covered wire X is dark.
  • the electric wire insertion portions 4 and 4A emit light and the amount of light reflected by the electric wire insertion portions 4 and 4A increases. With this, the positions of the voltage sensors 1 and 1A can be grasped reliably and easily, so that the workability of the mounting work and the removing work can be sufficiently improved.
  • the mounting work The workability can be sufficiently improved, and the position of the covered electric wire X inserted into the notch 32a can be reliably and easily grasped, so that the workability of the removal work can be sufficiently improved.
  • the “sensor” can be configured by including the “fourth member” that restricts the relative movement of the “electric wire insertion portion” with respect to the “electrode holding portion” in the “separation direction”.
  • the voltage sensor 1B shown in FIGS. 1, 2 and 13 to 18 is another example of “sensor”, and is a stopper 6 disposed between the electrode holding portion 3 and the wire insertion portion 4.
  • the voltage sensor 1 is configured similarly to the above-described voltage sensor 1 except that the voltage sensor 1 is provided.
  • constituent elements having the same functions as those of the voltage sensor 1 described above are designated by the same reference numerals, and redundant description will be omitted.
  • the stopper 6 is an example of a “fourth member”, and as shown in FIGS. 15 and 16, a spring steel material such as stainless steel, phosphor bronze, and beryllium copper is used to form a C shape (“annular” shape). 17), and is press-fitted into the tubular portion 31 and fixed to the wire insertion portion 4, as shown in FIGS.
  • the stopper 6 is disposed between the electrode holding portion 3 and the wire insertion portion 4 and is fixed to the wire insertion portion 4 in a state where the stopper 6 is movable relative to the electrode holding portion 3 in the cylinder length direction.
  • the wire holding portion 4 When the wire insertion portion 4 is moved in the “separating direction (direction of arrow B1)” to the “predetermined position” with respect to the electrode holding portion 3, the wire holding portion 4 is attached to the peripheral surface of the holding portion main body 11 in the electrode holding portion 3. It is configured to be capable of contacting the above-mentioned convex portion 11c provided and restricting the movement of the wire insertion portion 4 with respect to the electrode holding portion 3 in the "separation direction (direction of arrow B1)".
  • the stopper 6 in the voltage sensor 1B of this example has an outer diameter that is slightly larger than the inner diameter of the tubular portion 31 in the wire insertion portion 4 when the wire 6 is not press-fitted into the wire insertion portion 4. It is formed in such a size that the inner diameter in the state of being press-fitted in the insertion portion 4 (the state of being reduced in diameter by press-fitting) is slightly larger than the outer diameter of the holding portion main body 11 in the electrode holding portion 3.
  • the stopper 6 has a holding portion main body of the electrode holding portion 3 when the circumferential length of the gap between the one end portion and the other end portion of the stopper 6 in the circumferential direction is not press-fitted into the wire insertion portion 4.
  • the length is equal to or greater than the length of the convex portion 11c along the circumferential direction in 11 and is elastically deformable so as to be less than the length of the convex portion 11c along the circumferential direction in the holding portion main body 11 in a state of being press-fitted into the wire insertion portion 4. Is configured.
  • the convex portion 11c formed on the holding portion main body 11 functions as a "member contacting convex portion", and is brought into contact with the stopper 6 fixed to the wire insertion portion 4.
  • the movement of the holding portion main body 11 (electrode holding portion 3) with respect to the electric wire insertion portion 4 is restricted.
  • the electrode holding portion 3 (holding portion main body 11) of this example is provided with only one convex portion 11c having a function as a "member contacting convex portion".
  • the electrode 2 and the insulators 12a and 12b are inserted into the holding portion main body 11 to integrate them, and the core wire of the signal cable 5 is attached to the base end portion 2b of the electrode 2.
  • the signal cable 5 is fixed to the electrode 2 by soldering.
  • the stopper 23 is fitted into the groove 13b of the tubular portion 13 so that the operation knob 21 and the coil spring 22 are tubular. The separation from the section 13 is regulated.
  • the stopper 15 is fitted into the groove portion 11b of the holding portion main body 11 to insert the coil spring 14 and the tubular portion 13. Of the holding part body 11 from the holding part body 11 is restricted.
  • the bush 5a through which the signal cable 5 is inserted, is fixed to the base end of the holder body 11, and the stopper 6 is attached to the holder body 11.
  • the stopper 6 is attached to the holding portion main body 11, first, the stopper 6 is attached to the tip end portion of the holding portion main body 11, and then the gap between the one end portion and the other end portion of the stopper 6 in the circumferential direction is formed into a convex portion.
  • the stopper 6 is positioned between the convex portions 11a and 11c.
  • the stopper 6 is rotated 180 degrees with respect to the holding portion main body 11 so that there is no gap of the stopper 6 in the cylinder length direction of the holding portion main body 11 with respect to the convex portion 11c.
  • the holding portion main body 11 when the holding portion main body 11 is further pushed into the electric wire insertion portion 4 and the convex portion 11c is located at the rear end of the slit 32c in the electric wire insertion portion 4, the holding portion main body 11 is moved relative to the electric wire insertion portion 4. The convex portion 11c is allowed to enter the slit 32c by being rotated to. Further, by further pushing the holding portion main body 11 into the electric wire insertion portion 4 from the state where the convex portion 11c is inserted into the slit 32c, the distal end portion of the tubular portion 13 contacts the rear end portion of the electric wire insertion portion 4.
  • the operation knob 21 When contacted, the operation knob 21 is rotated in the direction of arrow A1 with respect to the electric wire insertion portion 4 to rotate the tubular portion 13 with respect to the electric wire insertion portion 4 and with the female screw 32b.
  • the male screw 13a of the portion 13 is screwed.
  • the stopper 6 attached to the tip of the holder body 11 is pushed by the convex portion 11a of the holder body 11 and moved inside the tubular portion 13 toward the tip.
  • the tubular portion 13 is moved together with the operation knob 21 in the direction of arrow A1 with respect to the wire insertion portion 4. Rotate. As a result, the tubular portion 13 in which the male screw 13a is screwed into the female screw 32b is moved in the direction of arrow B1 with respect to the wire insertion portion 4, and the tubular portion 13 is mounted.
  • the holding portion main body 11 is moved together with the tubular portion 13 in the direction of arrow B1 with respect to the electric wire insertion portion 4.
  • the electrode 2 integrated with the holding body 11 and the stopper 6 mounted on the holding body 11 are moved in the direction of arrow B1 with respect to the wire insertion portion 4.
  • the operation knob 21 When the operation knob 21 is rotated with respect to the electric wire insertion portion 4 as described above, the contact portion F3 (protruding end of each convex portion in the engaging portion E3) of the electrode holding portion 3 (operation knob 21) is the electric wire. After contact with the contact portion F4 of the insertion portion 4 (protrusion end of each convex portion in the engagement portion E4), the operation knob 21 is slid with respect to the tubular portion 13 due to elastic deformation of the coil spring 22. The engagement and disengagement of the engagement parts E3 and E4 are repeated.
  • the electrode holding part 3 is moved to the deepest side (most distal end side) of the wire insertion part 4 by rotating the operation knob 21 in the direction of the arrow A1 with respect to the wire insertion part 4 (this example).
  • the tip end surface S2 of the electrode 2 held by the electrode holding portion 3 is moved to a position in contact with the facing surface S4 of the wire insertion portion 4, the holding portion main body for the wire insertion portion 4 is Along with the movement of 11, the stopper 6 pushed by the convex portion 11a and moved inside the tubular portion 13 toward the tip portion is fixed at the fixed position in the wire insertion portion 4 (the stopper 6 in FIGS. 17 and 18).
  • the voltage sensor 1B when measuring the voltage value using this voltage sensor 1B, the voltage sensor 1B is attached to the covered electric wire X.
  • the tip end portion of the electrode 2 or the tip end side of the holding portion main body 11 has the notch 32a in the electric wire insertion portion 4.
  • the tip end of the electrode 2 or the holding part body 11 is placed inside the tubular part 31 of the wire insertion part 4. To house.
  • the operation knob 21 is rotated with respect to the wire insertion portion 4 in the direction of arrow A2.
  • the electrode 2 and the holding part main body 11 are fixed in the wire insertion part 4 in a state of being housed in the tubular part 31 of the wire insertion part 4 as described above.
  • the convex portion 11c of the holding portion main body 11 is in contact with the end surface of the stopper 6 that is formed.
  • this voltage sensor 1B further movement of the holding portion main body 11 with respect to the wire insertion portion 4 to which the stopper 6 is fixed is restricted in the direction of arrow B2. Even if it is not known how much 11 has been moved, the male screw 13a of the tubular portion 13 mounted on the holding body 11 and the female screw 32b formed on the inner surface of the wire insertion portion 4 are screwed together.
  • the state that is, the state in which the electrode holding portion 3 (holding portion main body 11, tubular portion 13 and the like) and the wire insertion portion 4 are integrated is maintained. Therefore, in this voltage sensor 1B, any drop due to unintentional separation of the electrode holding portion 3 and the wire insertion portion 4 is preferably avoided.
  • the electrode 2 is brought into contact with the insulating coating of the covered electric wire X to capacitively couple the electrode 2 with the conducting wire of the covered electric wire X.
  • the work procedure at this time (movement of the electrode holding part 3 and the electrode 2 with respect to the wire insertion part 4 in the direction of arrow B1 by the rotation of the operation knob 21 with respect to the wire insertion part 4 in the direction of arrow A1) is as follows. The procedure is the same as the procedure for mounting the voltage sensor 1 on the covered electric wire X, and thus detailed description thereof will be omitted. As a result, as shown in FIG.
  • the tip portion 2a (tip surface S2) of the electrode 2 is pressed against the covered electric wire X with a sufficient pressing force.
  • the electrode 2 is capacitively coupled to the conductor of the covered electric wire X in a suitable state, and the mounting of the voltage sensor 1B on the covered electric wire X is completed.
  • the voltage sensor 1B is activated by starting the measurement process. The voltage is detected via.
  • the voltage sensor 1B is removed from the covered electric wire X.
  • the “release operation” is performed in the same manner as when the voltage sensor 1 is removed from the covered electric wire X, and the coil spring 22 is attached to the tubular portion 13 screwed to the electric wire insertion portion 4.
  • the operation knob 21 is moved in the direction of arrow B2 against the force. Then, while maintaining the state in which the operation knob 21 is moved in the direction of arrow B2 (the state in which the coil spring 22 is pressed and contracted), the operation knob 21 is rotated in the direction of arrow A2 with respect to the wire insertion portion 4.
  • the holding part body 11 is moved together with the tubular part 13 in the direction of the arrow B2 with respect to the wire insertion part 4, so that the electrode 2 integrated with the holding part body 11 is moved with respect to the wire insertion part 4. It is moved in the direction of arrow B2.
  • the tips of the electrode 2 and the holding portion main body 11 are the tubes of the electric wire insertion portion 4.
  • the convex portion 11c comes into contact with the stopper 6 in the electric wire insertion portion 4, and further movement of the holding portion main body 11 with respect to the electric wire insertion portion 4 is restricted.
  • the separation of the electrode holding portion 3 and the wire insertion portion 4 is regulated.
  • the covered electric wire X and/or the voltage sensor 1B are moved so that the covered electric wire X in the notch 32a is located outside the electric wire insertion portion 4. With the above, the removal of the voltage sensor 1B from the covered electric wire X is completed.
  • the electric wire insertion portion is disposed between the electrode holding portion 3 and the electric wire insertion portion 4 and is movable relative to the electrode holding portion 3 in the “cylinder length direction”.
  • 4 is provided on the peripheral surface of the electrode holding part 3 when the wire insertion part 4 is moved in the “separating direction” relative to the electrode holding part 3 to a predetermined position.
  • the stopper 6 is provided which contacts the protruding portion 11c and restricts the relative movement of the wire insertion portion 4 with respect to the electrode holding portion 3 in the "separation direction”.
  • the stopper 6 is formed in an annular shape and is press-fitted into the wire insertion portion 4 and fixed to the wire insertion portion 4, so that the stopper 6 is fixed by a fixing method such as adhesion or screwing. Unlike this, since the stopper 6 can be easily fixed to the wire insertion portion 4, the manufacturing cost thereof can be sufficiently reduced.
  • the electrode holding portion 3 is provided with only one convex portion (in this example, the convex portion 11c) having a function as a “member contact convex portion”, and the stopper 6 is C
  • the electrode holding portion 3 (holding portion) is formed in a character shape and the circumferential length of the gap between the one end portion and the other end portion of the stopper 6 in the circumferential direction is not press-fitted into the wire insertion portion 4.
  • the length of the convex portion 11c along the circumferential direction of the part main body 11) is equal to or more than the length of the convex portion 11c along the circumferential direction of the electrode holding portion 3 (holding portion main body 11) in a state of being press-fitted into the wire insertion portion 4. It is configured to be elastically deformable so as to be less than the length.
  • this voltage sensor 1B when assembling, the stopper 6 is relatively positioned with respect to the holding portion main body 11 so that the convex portion 11c passes through the gap between the one end portion and the other end portion in the circumferential direction of the stopper 6.
  • the electrode holding portion 3 holding portion main body 11 with respect to the convex portion 11c.
  • the electrode holding portion 3 is inserted into the electric wire insertion portion 4 and the stopper 6 is fixed in the electric wire insertion portion 4.
  • the stopper 6 can be securely and easily fixed in the wire insertion portion 4, and the protrusion can be obtained when the wire insertion portion 4 is relatively moved in the “separation direction” with respect to the electrode holding portion 3.
  • the part 11c can be reliably brought into contact with the stopper 6 to reliably avoid unintended separation of the electrode holding part 3 and the wire insertion part 4.
  • the voltage sensor 1B provided with the stopper 6 formed in a C shape so that a gap is formed between both ends in the circumferential direction in the state of being fixed to the wire insertion portion 4 has been described as an example.
  • the shape of is not limited to this.
  • a "fourth member" having a pair of semi-annular members whose inner diameter is approximately the same as the outer diameter of the "electrode holding portion” and whose outer diameter is approximately the same as the inner diameter of the "wire insertion portion” is provided.
  • the above-mentioned voltage sensor is provided by providing the inner peripheral portion with a recess through which the "member contacting protrusion” can pass. Similar to 1B, the "fourth member” is attached to the “electric wire insertion part" together with the “electrode holding part” with the “fourth member” attached to the “electrode holding part” during assembly. Can be fixed.
  • the voltage sensor 1B in which only one convex portion 11c is provided on the electrode holding portion 3 has been described as an example, but a plurality of “member contact convex portions” along the circumferential direction are provided on the “electrode holding portion”. It can also be provided.
  • a “fourth member” configured by a pair of semi-annular members is used, or a plurality of “member contacting convex portions” that can pass through are adopted.
  • the “fourth member” composed of one annular body having the concave portion provided on the inner peripheral portion, the “fourth member” is replaced with the “electrode holding portion” at the time of assembly, as in the voltage sensor 1B described above. It is possible to fix the “fourth member” to the “electric wire insertion portion” by inserting the “electric wire holding portion” and the “electric wire insertion portion” together with the “electrode holding portion”.
  • the fixing method of the “fourth member” to the “electric wire insertion portion” is not limited to the press-fitting like the fixing method of the stopper 6 to the electric wire insertion portion 4, and various fixing methods such as adhesion and screwing may be used.
  • the "fourth member” can be fixed to the "insertion portion".
  • the configuration in which the convex portion 11c that is fitted into the slit 32c so that the rotation of the electrode holding portion 3 with respect to the electric wire insertion portion 4 can be regulated is provided as the "member contacting convex portion" has been described as an example.
  • a dedicated convex portion having no function other than the function as the “member contacting convex portion” can be provided in the “electrode holding portion” as the “member contacting convex portion”.
  • the voltage sensors 1, 1A, 1B were described by using the electric wire insertion portions 4, 4A provided with the electric wire contact portions Px on the inner edge portion of the notch 32a and the facing surface S4 as an example. It can also be configured by including an "electric wire insertion portion” in which the "contact portion” does not exist. Also, the cylindrical portions 13 and 43 (the electrode holding portions 3 and 3A) having the male screw 13a formed on the outer peripheral surface are inserted into the wire insertion portions 4 and 4A having the female screw 32b formed on the inner peripheral surface.
  • the voltage sensors 1, 1A, and 1B have been described as an example.
  • the “electric wire having the male screw formed on the outer peripheral surface” is used.
  • the “sensor” can also be configured to insert an “insert” (not shown).
  • any electrical parameter other than the voltage can be used as the “detected amount”.
  • a “sensor” that can be detected as a “detection amount” may have the same configuration as the voltage sensors 1, 1A, 1B (not shown).
  • the present invention relates to a sensor capable of detecting a detected amount of a covered electric wire in a non-contact state with a conductor of the covered electric wire, and detecting the detected amount under a temperature environment different from that when mounted on the covered electric wire.
  • the second member is excessively rotated with respect to the electric wire insertion portion in which the covered electric wire is inserted in the notch and the second member is moved too close to the electric wire insertion portion, It is possible to prevent the electrode held by the one member from being pressed against the covered electric wire with an excessively strong pressing force. As a result, the detected amount can be detected without causing breakage of the covered electric wire.

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  • General Engineering & Computer Science (AREA)
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Abstract

La présente invention a pour but de maintenir un état dans lequel une électrode est pressée contre un fil revêtu à l'aide d'une force de pression appropriée.　La présente invention comprend une électrode (2), une partie (3) de retenue d'électrode, et une partie (4) d'insertion d'électrode, et elle est conçue pour détecter une valeur de détection pour un fil revêtu (X) sans se mettre en contact avec le fil conducteur. La partie (3) de retenue d'électrode comprend : un corps (11) de partie de retenue prenant une forme cylindrique dans laquelle une électrode (2) peut être introduite et être ainsi intégrée audit corps, étant muni d'une saillie (11c) pouvant entrer en prise avec une fente (32c) agencée au niveau de la partie (4) d'insertion d'électrode, et dont la rotation par rapport à la partie (4) d'insertion d'électrode est limitée lorsqu'un déplacement dans la direction longitudinale du cylindre, par rapport à la partie (4) d'insertion d'électrode, est permis ; une partie cylindre (13) prenant une forme cylindrique dans laquelle le corps (11) de la partie de retenue peut être introduit, sur laquelle une vis mâle (13a) est formée, et étant fixée au corps (11) de la partie de retenue lorsqu'un déplacement dans la direction longitudinale du cylindre, par rapport au corps (11) de la partie de retenue, et une rotation par rapport au corps (11) de la partie de retenue, sont permis ; et un ressort hélicoïdal (14) destiné à solliciter le corps (11) de la partie de retenue dans la direction vers la partie cylindre (13).
PCT/JP2020/003595 2019-02-04 2020-01-31 Capteur WO2020162340A1 (fr)

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JP2019-017563 2019-02-04
JP2019017563 2019-02-04
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Citations (10)

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US4738633A (en) * 1985-04-15 1988-04-19 Walter Rose Gmbh & Co., Kg Device for making an electrically conductive contact to an insulated cable lead
JPS63221254A (ja) * 1986-11-14 1988-09-14 アドバンスド・サイエンテイフィック・コーポレーション 回路試験装置
JPH0557670U (ja) * 1991-12-27 1993-07-30 横河電機株式会社 プローブ
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US6756799B1 (en) * 2002-04-18 2004-06-29 Richard Bryon Seltzer Multi-meter test lead system
CN101672862A (zh) * 2008-09-08 2010-03-17 陆建华 一种测电笔探头
JP2016223866A (ja) * 2015-05-29 2016-12-28 日置電機株式会社 電圧検出プローブおよび測定装置
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