JP6245575B2 - Clamp sensor and measuring device - Google Patents

Description

  The present invention relates to a clamp sensor having a pair of clamp portions and a measuring apparatus having the clamp sensor.

  As a clamp sensor of this type, a clamp sensor disclosed by the applicant in Patent Document 1 below is known. The clamp sensor includes a main body portion in which a first sensor is accommodated in a distal end portion, a slide portion in which a second sensor is accommodated in the distal end portion and is slidable with respect to the main body portion, and An operation unit for restricting and releasing the slide of the slide part toward the base end side is provided, and the physical quantity can be detected in a state where the detection target (electric wire) is clamped. In this clamp sensor, when the operation unit is slid toward the distal end side of the main body, sliding of the slide portion toward the base end of the main body is restricted, and the operation unit is slid toward the base end of the main body. When this happens, the restriction of the sliding of the sliding portion toward the proximal end side is released.

JP 2014-13182 (page 6-8, FIG. 2)

  However, the above clamp sensor has the following problems to be improved. That is, in this clamp sensor, sliding of the sliding portion is restricted when the operating portion is slid to the distal end side of the main body portion, and sliding of the sliding portion is performed when the operating portion is slid to the proximal end portion side of the main body portion. Will be lifted. For this reason, in this clamp sensor, for example, when an operation unit (an operation projection provided on the operation unit) comes into contact with an object during use, the slide regulation of the slide unit is unintentionally released. As a result, the clamped state of the detection target is released, and as a result, the detection of the physical quantity may be interrupted.

  This invention is made | formed in view of this subject, and it aims at providing the clamp sensor and measuring apparatus which can prevent the release contrary to the meaning of a clamp state.

  In order to achieve the above object, a clamp sensor according to claim 1 is configured such that a main body having a pair of main surfaces opposed to each other and at least one of them can be moved so that the respective front ends can be opened and closed. A pair of clamp portions that are arranged at one end and configured to be able to clamp a clamp target in a closed state in which the tip portions are closed, and open and close the tip portions of the clamp portions according to operations. And an open / close mechanism capable of maintaining the closed state between the tip portions, and a clamp sensor configured to detect a detection amount of the clamp target, wherein the open / close mechanism When each of the clamps is slidably disposed along the length of the main body portion connecting the end portion and the one end portion and is slid to the one end portion side, A first slide portion that moves at least one of the clamp portions in a direction in which the tip portions of the clamp portions are closed by pressing at least one of the clamp portions, and is configured to be slidable along the length direction. And allowing the first slide portion to slide when being slid to either one of the other end portions, and the one end portion in a state where the first slide portion is slid to the one end portion side. And a second slide part that regulates the slide of the first slide part and maintains the closed state of the tip parts when being slid to the other side of the other end part.

  Further, the clamp sensor according to claim 2 is the clamp sensor according to claim 1, wherein a groove portion extending along the length direction is formed on an inner surface of the main surface of the main body portion, and the main body portion is formed. A first protrusion that protrudes from the inner surface is formed on at least one inner surface of each of the main surfaces, and the first slide portion is slidable along the groove portion with a side portion fitted into the groove portion. And a first abutting portion formed at the front end and provided on the inner surface of the main surface so as to extend toward the other end side. A first arm portion that is elastically deformable in a direction toward and away from the first arm portion and that presses the first projection portion by elastic force, and the first slide portion is disposed on the other end side. The first abutting portion is in front in the sliding state The first arm portion is located on the other end portion side of the first projecting portion, and the first arm portion is elastically deformed when the first slide portion is slid from the other end portion side to the one end portion side. The contact portion is configured to be positioned on the one end side of the first projection portion over the first projection portion, and the second slide portion is a fitting portion formed on the first slide portion main body. A second slide portion main body configured to be slidable along the length direction in a state of being fitted into the second slide body, and a restriction provided to extend from the second slide portion main body toward the other end side. And when the second slide portion is slid to any one side, the restricting portion is maintained in a non-contact state with respect to the first arm portion, and from the inner surface of the main surface Allowing the elastic deformation of the first arm in the direction of separation The first slide portion is allowed to slide, and when the second slide portion is slid to the other side, the restricting portion comes close to or abuts on the first arm portion and is separated from the inner surface of the main surface. By restricting the elastic deformation of the first arm portion in the direction to be performed, the slide of the first slide portion is restricted.

  According to a third aspect of the present invention, in the clamp sensor according to the second aspect, the second protrusion protruding from the inner surface of the side wall is formed on the inner surface of the side wall constituting the fitting portion of the first slide portion. And the second slide part is provided on the second slide part body so that the second contact part is formed at the tip part and extends toward the one end part side, and the inner surface of the side wall A second arm portion that can be elastically deformed in a direction toward and away from the second arm and that presses the second projecting portion by an elastic force, and the second slide portion is slid to the other end side. The second arm portion is located when the second contact portion is positioned on the other end portion side of the second projecting portion and the second slide portion is slid from the other end portion side to the one end portion side. Is elastically deformed and the second contact portion is Overcame protrusions are configured to be positioned on the one end side of the second protrusion.

  The clamp sensor according to claim 4 is the clamp sensor according to any one of claims 1 to 3, wherein the second slide portion is slid to the one end side as the one side. Sometimes, the slide of the first slide part is allowed, and the slide of the first slide part is restricted when it is slid to the other end part side as the other side.

  The clamp sensor according to claim 5 is the clamp sensor according to any one of claims 1 to 4, wherein the first slide portion includes a first operation protrusion for slide operation, and the second slide. The second operation projection portion for slide operation, and the first slide projection portion and the second slide portion are arranged such that the first operation projection portion is closer to the one end than the second operation projection portion. It is arranged to be located in.

  According to a sixth aspect of the present invention, in the clamp sensor according to the fifth aspect, the second operation protrusion is smaller than the first operation protrusion.

  According to a seventh aspect of the present invention, there is provided a measuring apparatus that measures a measurement amount of the clamp target based on the clamp sensor according to any one of the first to sixth aspects and the detection amount detected by the clamp sensor. Department.

  In the clamp sensor according to claim 1 and the measurement apparatus according to claim 7, when the tip part of each clamp part is closed in a direction to be closed when the slide part is slid to one end part side of the main body part, the clamp part is rotated. A first slide portion to be moved, and a first slide when the first slide portion is slid to either one end or the other end of the main body in a state where the first slide is slid to the one end of the main body The opening / closing mechanism is configured to include a second slide part that regulates the sliding of the part and maintains the closed state of the tip parts. For this reason, according to the clamp sensor and the measuring apparatus, unlike the configuration in which the second slide part that restricts the slide of the first slide part is not provided, for example, during use of the clamp sensor (during detection of the detection amount). Even if the first slide part comes into contact with any object, the first slide part can be maintained in a non-sliding state. Therefore, according to the clamp sensor and the measuring device, the clamped state in which the clamp target is clamped (the closed state in which the tip portions of the clamp portions are closed) is released unexpectedly, and as a result, the detected amount It is possible to surely prevent the situation where the detection and measurement of the measurement amount are interrupted. Moreover, in this clamp sensor and measuring apparatus, the slide direction of the 1st slide part at the time of closing each front-end | tip part of each clamp part, and the slide direction of the 2nd slide part at the time of regulating the slide of a 1st slide part Since both can be made into the direction (namely, the same direction) along the length direction of the main-body part, operativity can fully be improved.

  According to the clamp sensor according to claim 2 and the measuring device according to claim 7, when the second slide portion is slid to either one of the one end portion and the other end portion of the main body portion, the restricting portion. By restricting the sliding of the first slide part by restricting the elastic deformation of the first arm part in a direction that contacts the first arm part of the first slide part and separates from the inner surface of the main surface of the main body part. Although it is a simple configuration, it is possible to reliably switch between an unlocked state in which the slide of the first slide part is allowed and a main lock state in which the slide of the first slide part is restricted.

  Further, according to the clamp sensor according to claim 3 and the measuring device according to claim 7, the second protrusion is formed on the inner surface of the side wall of the first slide portion, and the second contact portion is provided at the tip portion. The second slide part is configured with the elastically deformable second arm part provided on the second slide part main body so as to extend toward the one end side of the main body part. The slide of the second slide part can be prevented. For this reason, according to this clamp sensor and measuring apparatus, the situation where an unlocked state and this lock state are switched unexpectedly by the vibration of a clamp sensor, etc. can be prevented reliably.

  In the clamp sensor according to claim 4 and the measuring apparatus according to claim 7, the slide of the first slide part is restricted when the second slide part is slid to the base end side of the main body part. That is, in this clamp sensor and measuring apparatus, the slide direction of the first slide part when closing the tip parts of the clamp parts and the slide of the second slide part when regulating the slide of the first slide part. The directions can be opposite to each other. For this reason, according to this clamp sensor and measuring apparatus, even if the force which goes to the base end part side of a main-body part which is the direction which cancels | releases a clamp state is added to a 2nd slide part, a slide of a 1st slide part is controlled. As a result of reliably maintaining the locked state, it is possible to more reliably prevent the clamped state from being released unexpectedly.

  According to the clamp sensor of the fifth aspect and the measuring device of the seventh aspect, the first operation protrusion of the first slide part is closer to the body part than the second operation protrusion of the second slide part. By arranging the first slide portion and the second slide portion so as to be located on the one end portion side, for example, when the second slide portion is slid on the one end portion side of the main body portion, the slide of the first slide portion is regulated. In the case where the configuration is adopted, when the clamp sensor is used in a place where there is an obstacle in the front, the contact between the second operation protrusion of the second slide portion and the obstacle is made to the first of the first slide portion. Since it can guard with the operation projection part, the situation where the second slide part slides due to the contact and the locked state is released can be surely prevented.

  According to the clamp sensor described in claim 6 and the measuring device described in claim 7, the second operation protrusion of the second slide portion is formed smaller than the first operation protrusion of the first slide portion. Thus, for example, when a configuration is adopted in which the slide of the first slide part is regulated when the second slide part is slid to the one end side of the main body part, the clamp sensor is located at the front where there is an obstacle. Since the contact between the second operation protrusion of the second slide part and the obstacle can be more reliably guarded by the first operation protrusion of the first slide part when using the It is possible to more reliably prevent a situation in which the sliding portion is slid to release the locked state.

1 is a configuration diagram showing a configuration of a current measuring device 1. FIG. 3 is a perspective view of a clamp sensor 3. FIG. 3 is a front view of the clamp sensor 3. FIG. 4 is a plan view of the clamp sensor 3. FIG. It is sectional drawing of the clamp sensor 3. FIG. 5 is a perspective view of a first slide part 71 and a second slide part 72. FIG. It is the perspective view which looked at the 1st slide part 71 and the 2nd slide part 72 of the unlocked state from the front side. It is the perspective view which looked at the 1st slide part 71 and the 2nd slide part 72 of the unlocked state from the back side. It is the perspective view which looked at the 1st slide part 71 and the 2nd slide part 72 of this lock state from the front side. It is the perspective view which looked at the 1st slide part 71 and the 2nd slide part 72 of this locked state from the back side. It is sectional drawing (sectional drawing cut | disconnected by the BB line in FIG. 3) of the main-body part 21, the 1st slide part 71, and the 2nd slide part 72 in an open state (unlocked state). It is sectional drawing of the main-body part 21, the 1st slide part 71, and the 2nd slide part 72 in a temporary lock state. It is sectional drawing of the main-body part 21, the 1st slide part 71, and the 2nd slide part 72 in this locked state. It is sectional drawing of the clamp sensor 3 in an open state. It is sectional drawing of the clamp sensor 3 in a temporary lock state. It is a perspective view of the 1st slide part 171 and the 2nd slide part 172 in an unlocked state. It is a perspective view of the 1st slide part 171 and the 2nd slide part 172 in this lock state. It is a perspective view of the 1st slide part 271 and the 2nd slide part 272 in an unlocked state. It is a perspective view of the 1st slide part 271 and the 2nd slide part 272 in this locked state. It is a perspective view of the 1st slide part 371 and the 2nd slide part 372 in an unlocked state. It is a perspective view of the 1st slide part 371 and the 2nd slide part 372 in this lock state. It is a perspective view of the 1st slide part 471 and the 2nd slide part 472 in an unlocked state. It is a perspective view of the 1st slide part 471 and the 2nd slide part 472 in this lock state.

  Hereinafter, embodiments of a clamp sensor and a measuring apparatus will be described with reference to the accompanying drawings.

  First, the configuration of a current measuring device 1 as an example of a measuring device will be described with reference to the drawings. The current measuring device 1 illustrated in FIG. 1 is configured to be able to measure, for example, a current (an example of a measured amount) that flows through an electric wire 200 (see FIG. 3) as a clamp target. Specifically, as shown in FIG. 1, the current measuring device 1 includes a device main body 2 and a clamp sensor 3.

  As shown in FIG. 1, the apparatus main body 2 includes a measurement unit 11, an operation unit 12, a display unit 13, and a control unit 14.

  The measurement unit 11 performs measurement processing for measuring the current flowing through the electric wire 200 based on the magnetism (an example of the detection amount) detected by the clamp sensor 3 according to the control of the control unit 14.

  The operation unit 12 includes various switches, and outputs an operation signal when each switch is operated. The display unit 13 displays a measured current value and the like under the control of the control unit 14. The control unit 14 controls each unit constituting the apparatus main body 2 according to an operation signal output from the operation unit 12.

  The clamp sensor 3 is a clamp sensor that detects magnetism as an example of a detection amount in a state in which the electric wire 200 as a clamp target is clamped (enclosed state: see FIG. 3), as shown in FIGS. The main body 21, the first clamp part 31, the second clamp part 32, and the opening / closing mechanism 61 are provided.

  As shown in FIGS. 2 to 4, the main body 21 includes a pair of main surfaces 22 a and 22 b facing each other (hereinafter also referred to as “main surface 22” when not distinguished) and a pair of side surfaces 23 a and 23 b facing each other. It has a box shape in which the distal end portion 21a (corresponding to one end portion) is opened and the proximal end portion 21b (corresponding to the other end portion) is closed.

  Further, as shown in FIGS. 2 and 4, a cutout 24 that exposes a first slide portion 71 and a second slide portion 72 of an opening / closing mechanism 61 described later is formed on the side surface 23 b of the main body portion 21. Further, in the vicinity of the side surface 23b on the inner surface 22c (see FIG. 11) of the main surface 22, as shown in FIG. 4, a guide groove 25 for slidably supporting the first slide portion 71 and the second slide portion 72. (Corresponding to the groove) is formed so as to extend along the length direction of the main body 21 connecting the base end 21b and the front end 21a of the main body 21. Further, as shown in FIG. 11, a protrusion 28 (corresponding to a first protrusion) protrudes from the inner surface 22c at a position of the base end portion 21b rather than a position where the guide groove 25 is formed on the inner surface 22c of each main surface 22. ) Are formed. In this case, a configuration in which the protrusions 28 are formed only on one inner surface 22c of each main surface 22 can also be adopted.

  Further, a plurality of streaky convex portions 26 functioning as slip stoppers are formed on the side surface 23 a of the main body portion 21. Further, as shown in FIG. 5, the main body portion 21 is provided with a support shaft 27 that supports the second clamp portion 32 so as to intersect (is orthogonal to the main surfaces 22 a and 22 b). Yes. In this case, as shown in the figure, the support shaft 27 is located on the side surface 23b side (on the side where the first slide portion 71 is disposed) from the center C of the annular body R formed by the clamp portions 31 and 32. It corresponds to the other side surface 23 side of the side surfaces 23). More specifically, the support shaft 27 is provided closer to the side surface 23b than the position on the straight line A passing through the center C and parallel to the side surface 23b, as shown in FIG.

  As shown in FIG. 5, the first clamp portion 31 includes a first case 41 and a first sensor 51. The first case 41 is formed separately from the main body portion 21. As shown in FIGS. 5 and 14, the first case 41 is formed so as to have a semicircular front view, and has an accommodation space in which the first sensor 51 can be accommodated. As shown in both the drawings, the first sensor 51 is formed in a semicircular shape when viewed from the front, and is accommodated in the accommodating space of the first case 41. The first clamp portion 31 is fixed to the side surface 23a (one side surface 23 of each side surface 23) side of the distal end portion 21a of the main body portion 21 in a non-movable state. In this case, both a configuration in which the first case 41 and the main body portion 21 of the first clamp portion 31 are separated and a configuration in which the first case 41 and the main body portion 21 are integrated can be adopted.

  As shown in FIG. 5, the second clamp portion 32 includes a second case 42 and a second sensor 52. As shown in FIGS. 5 and 14, the second case 42 has a semicircular front view, and an accommodation space in which the second sensor 52 can be accommodated is formed. As shown in both figures, the second sensor 52 is formed in a semicircular shape when viewed from the front, and is accommodated in the accommodating space of the second case 42. The second sensor 52 detects magnetism as a detection amount together with the first sensor 51 of the first clamp part 31.

  In addition, as shown in FIG. 5, the second clamp portion 32 has a base end portion 32 b pivotally supported by a support shaft 27 provided in the main body portion 21, and rotates around the support shaft 27. The side surface 23b (the other side surface 23 of the side surfaces 23) of the front end portion 21a of the main body portion 21 is arranged on the side.

  Further, as shown in FIG. 5, a flat surface portion 42 b is provided on the outer peripheral surface 42 a of the second case 42 on the base end portion 32 b side of the second clamp portion 32. In this case, the flat surface portion 42b of the first slide portion 71 in the opening / closing mechanism 61 is in a state where the tip portions 31a and 32a of the clamp portions 31 and 32 are closed (hereinafter, this state is also referred to as “closed state”). It is formed in the contacted part with which the front end part 71a (see the figure) contacts. Further, as shown in the figure, the flat surface portion 42b is in a closed state with respect to the length direction of the main body portion 21 (the sliding direction of the first slide portion 71: the direction of the arrow X shown in FIGS. 3 to 5). It is formed to be parallel.

  In the clamp sensor 3, the clamp portions 31 and 32 are configured as described above, so that the tip portions 31 a and 32 a of the first clamp portion 31 and the second clamp portion 32 can be opened and closed. . Moreover, in this clamp sensor 3, the annular body R (refer FIG. 5) surrounding the electric wire 200 to be clamped is formed by the clamp portions 31 and 32 in the closed state. In this case, in the clamp sensor 3, the clamp portion is configured such that the opening surface O (see the same figure) of the annular body R formed by the clamp portions 31 and 32 is parallel to the main surfaces 22 a and 22 b of the main body portion 21. 31 and 32 are arranged in the main body 21.

  The opening / closing mechanism 61 is a mechanism that can open and close the tip portions 31a and 32a of the clamp portions 31 and 32 in accordance with a closing operation and can maintain a closed state in which the tip portions 31a and 32a are closed in accordance with a locking operation. As shown in FIGS. 2 to 5, the first slide portion 71, the second slide portion 72, and the spring 73 (see FIG. 5) are provided.

  As shown in FIGS. 2 to 5, the first slide portion 71 is slidably disposed on the side surface 23 b (the other side surface) side of the main body portion 21. Specifically, as shown in FIGS. 6 to 10, the first slide portion 71 includes a slide portion main body 81a (first slide portion main body) and a pair of arm portions 81b (first arm portion). Has been.

  As shown in FIG. 6, the slide portion main body 81 a has a rectangular shape in plan view, and is formed in the vicinity of the side surface 23 b of the main surfaces 22 a and 22 b of the main body portion 21 (see FIGS. 4 and 11). The side part is fitted to the base part 21 and the base part 21b of the main body part 21 is slid along the length direction of the main body part 21 connecting the distal end part 21a (the direction of the arrow X shown in FIGS. 3 to 5). It is possible.

  Also, as shown in FIGS. 8 and 10, a fitting portion 81d capable of fitting a second slide portion 72 (a slide portion main body 82a and an arm portion 82b described later) on the back side (lower surface side) of the slide portion main body 81a. Is formed. As shown in FIGS. 8, 10, and 11, a protrusion 81g (second protrusion) protruding from the inner surface 81f is formed on the inner surface 81f of the side wall 81e of the slide portion main body 81a constituting the fitting portion 81d. ing. Further, as shown in FIG. 6, an operation projection 81h (first operation projection) used when the first slide portion 71 is slid is provided on the front side (upper surface side) of the slide portion main body 81a. Yes.

  As shown in FIGS. 6 and 11, the arm portion 81 b is an end portion of the slide portion main body 81 a that is positioned on the base end portion 21 b (the other end portion) side of the main body portion 21 in the state of being arranged on the main body portion 21 (both figures). The slide portion main body 81a is provided so as to extend from the right end portion) toward the base end portion 21b. Further, as shown in both figures, an abutting part 81c (first abutting part) is formed at the tip of the arm part 81b (the right end in both figures). In this case, the arm portion 81 b can be elastically deformed in a direction in which the abutting portion 81 c comes in contact with and separates from the inner surface 22 c of the main surface 22 in the main body portion 21, and the first slide portion 71 is disposed on the main body portion 21. In this state, the contact portion 81c is configured to press the protrusion 28 by an elastic force.

  The first slide portion 71 is used when the tip portions 31a and 32a of the clamp portions 31 and 32 are opened and closed. Specifically, by sliding the first slide portion 71 toward the distal end portion 21a side of the main body portion 21 (in the direction of the arrow X1 shown in FIG. 15), the distal end portion 71a of the first slide portion 71 is second. Direction of the clamp portions 32 (an example of at least one of the clamp portions 31 and 32) in contact with the outer peripheral surface 42a of the second case 42 and closing the tip portions 31a and 32a of the clamp portions 31 and 32 (in the same figure). The second clamp portion 32 is rotated (moved) in the direction of the arrow R2 shown in FIG. 2, whereby the tip portions 31a and 32a are closed (closed state).

  Further, by sliding the first slide portion 71 toward the base end portion 21b of the main body portion 21 (in the direction of the arrow X2 shown in FIG. 15), the front end portion 71a comes into contact with the outer peripheral surface 42a of the second case 42. Is released, and the second clamp portion 32 rotates in the direction in which the tip portions 31a and 32a of the clamp portions 31 and 32 open by the urging force of the spring 73 (the direction of the arrow R1 shown in FIG. 14). The tip portions 31a and 32a are in an open state (see the same figure: hereinafter, this state is also referred to as “open state”).

  Further, as shown in FIG. 11, the first slide portion 71 is in contact with the arm portion 81 b when being slid to the base end portion 21 b (the other end portion) side of the main body portion 21. The portion 81c is configured to be located on the base end portion 21b side (right side in the figure) of the projection portion 28 formed on the inner surface 22c of the main surface 22 of the main body portion 21. 12 and 13, when the first slide portion 71 is slid from the proximal end portion 21b side to the distal end portion 21a (one end portion) side of the main body portion 21, the arm portion 81b is elastically deformed. Thus, the abutting portion 81c is arranged so as to get over the protruding portion 28 and be positioned on the tip end 21a side (left side in both drawings) of the protruding portion 28.

  The second slide portion 72 can slide relative to the first slide portion 71 along the length direction of the main body portion 21 (the slide direction of the first slide portion 71). Specifically, as shown in FIGS. 6 to 10, the second slide portion 72 includes a slide portion main body 82a (second slide portion main body), a pair of arm portions 82b (second arm portions), and a restricting portion 82d. It is prepared for.

  As shown in FIG. 6, the slide portion main body 82a has a rectangular shape in plan view, and is fitted into a fitting portion 81d formed on the back surface side of the first slide portion 71 as shown in FIGS. In this state, it is possible to slide along the length direction of the main body portion 21 (the slide direction of the first slide portion 71) with respect to the first slide portion 71. Further, as shown in FIG. 6, an operation projection 82e (second operation projection) used when sliding the second slide portion 72 is provided on the front side (upper surface side) of the slide portion main body 82a. Yes. In this case, the operation protrusion 82 e of the second slide portion 72 is formed to be smaller than the operation protrusion 81 h of the first slide portion 71. It is also possible to adopt a configuration in which the operation projection 81h is formed smaller than the operation projection 82e, or a configuration in which both the operation projections 81h and 82e are formed in the same size. Further, in the clamp sensor 3, as shown in FIG. 7, the first protrusion is such that the operation protrusion 81h is positioned closer to the distal end 21a side (left side in the figure) of the main body 21 than the operation protrusion 82e. A slide part 71 and a second slide part 72 are arranged on the main body part 21.

  As shown in FIGS. 6 and 11, the arm portion 82 b extends from the slide portion main body 82 a toward the distal end portion 21 a side of the main body portion 21. At the left end). Further, an abutting portion 82c (second abutting portion) is formed at the distal end portion (left end portion in both drawings) of the arm portion 82b. In this case, the arm portion 82b can be elastically deformed in a direction in which the abutting portion 82c comes in contact with and separates from the inner surface 81f of the side wall 81e of the first slide portion 71, and the fitting portion 81d of the first slide portion 71 is provided. The protrusion 81g is configured to be pressed by an elastic force in a state where the protrusion 81g is fitted.

  The restricting portion 82d restricts elastic deformation of the arm portion 81b in a direction approaching (or contacting) the arm portion 81b of the first slide portion 71 and moving away from the inner surface 22c of the main surface 22 of the main body portion 21. A member having a function of regulating the slide of the first slide portion 71, as shown in FIGS. 6 and 11, a base in the slide portion main body 82 a so as to extend toward the base end portion 21 b side of the main body portion 21. It is provided at the end on the end 21b side.

  The second slide portion 72 has a function of regulating the sliding of the first slide portion 71 with respect to the main body portion 21 and maintaining the closed state of the tip portions 31 a and 32 a of the clamp portions 31 and 32. Specifically, as shown in FIGS. 7, 8, 11, and 12, the second slide portion 72 has a front end portion 21 a (one end portion) side (one end portion and others) of the main body portion 21 with respect to the first slide portion 71. When being slid (relatively slid) on one of the end portions), the restricting portion 82d is maintained in a state where it does not approach or abut against the arm portion 81b (non-abutting state). Thus, the first slide portion 71 is allowed to slide by allowing elastic deformation of the arm portion 81b in a direction away from the inner surface 22c of the main surface 22 in the main body portion 21 (hereinafter, this state is referred to as “unlocked state”). ”). Further, as shown in FIGS. 9, 10, and 13, the second slide portion 72 is in a state where the first slide portion 71 is slid to the distal end portion 21 a side of the main body portion 21, and the base end portion 21 b of the main body portion 21. When it is slid (slid relative to the first slide portion 71) to the (other end) side (an example of the other end of the one end and the other end) (when the lock operation is performed), the arm The restricting portion 82d approaches (or abuts) the portion 81b, thereby restricting the elastic deformation of the arm portion 81b in the direction away from the inner surface 22c of the main surface 22 in the main body portion 21 to thereby restrict the first slide portion 71. The slide is restricted (see FIGS. 9, 10, and 13: hereinafter, this state is also referred to as “main locked state”).

  Further, as shown in FIGS. 8, 11, and 12, the second slide portion 72 is formed on the arm portion 82 b when the second slide portion 72 is slid toward the distal end portion 21 a side of the main body portion 21 with respect to the first slide portion 71. The abutting portion 82c is configured to be positioned on the tip 21a side (left side in the figure) of the protruding portion 81g formed on the first slide portion 71. Further, as shown in FIGS. 10 and 13, the second slide portion 72 is slid from the distal end portion 21 a side of the main body portion 21 to the proximal end portion 21 b side (right side in the figure) with respect to the first slide portion 71. When this is done, the arm portion 82b is elastically deformed so that the contact portion 82c gets over the projection 81g and is positioned on the proximal end 21b side of the projection 81g.

  The spring 73 is an example of a biasing member, and biases the second clamp portion 32 in a direction in which the tip portions 31a and 32a of the clamp portions 31 and 32 open. In this case, as an example, the spring 73 is constituted by a torsion coil spring (torsion spring). As shown in FIG. 5, the coil portion 73 a is supported by the support shaft 27 and one arm portion 73 b is attached to the main body portion 21. The other arm portion 73 c is engaged with the base end portion 32 b of the second clamp portion 32.

  Next, a method for using the current measuring device 1 will be described with reference to the drawings.

  First, the operation unit 12 of the apparatus main body 2 is operated to turn on the power, and then the electric wire 200 to be clamped is clamped by the clamp units 31 and 32 of the clamp sensor 3. Specifically, the body part 21 of the clamp sensor 3 (see FIG. 14) in the open state is grasped, and the clamp parts 31 and 32 are brought close to the electric wire 200.

  In this case, in the clamp sensor 3 in the open state, as shown in FIG. 11, the first slide portion 71 of the opening / closing mechanism 61 is located on the base end portion 21b side (right side in the figure) of the main body portion 21, and the second The slide portion 72 is located on the distal end portion 21a side (left side in the figure) of the main body portion 21 with respect to the first slide portion 71. Further, in this state, as shown in the figure, the contact part 81c of the arm part 81b in the first slide part 71 is located on the base end part 21b side (right side in the figure) of the protrusion part 28 in the main body part 21. The abutment portion 82c of the arm portion 82b in the second slide portion 72 is located on the tip end portion 21a side (left side in the figure) of the projection 81g in the first slide portion 71.

  Furthermore, in this state, as shown in FIG. 11, the restricting portion 82 d of the second slide portion 72 is maintained in a state where it does not approach and abut against the arm portion 81 b of the first slide portion 71, thereby the main body portion 21. As a result of allowing the elastic deformation of the arm portion 81b in the direction away from the inner surface 22c of the first slide portion 71, the first slide portion 71 is allowed to slide.

  Further, as shown in FIG. 14, the distal ends 31a and 32a of the clamp portions 31 and 32 are opened by the biasing force of the spring 73 in the opening / closing mechanism 61 (the second direction in the direction of the arrow R1 shown in FIG. 14). The clamp portion 32 is in a rotated state).

  Subsequently, the electric wire 200 is passed through the gap between the tip portions 31a and 32a in the clamp portions 31 and 32, and the electric wire 200 is located in a space sandwiched between the opposing clamp portions 31 and 32 as shown in FIG. Thus, the clamp sensor 3 is moved.

  Next, an operation (slide operation) is performed in which the fingertip is pressed against the operation protrusion 81 h of the first slide portion 71 and the first slide portion 71 is pushed toward the distal end portion 21 a of the main body portion 21. 71 and the second slide portion 72 are slid along the length direction of the main body portion 21 toward the distal end portion 21a side of the main body portion 21 (in the direction of the arrow X1 shown in FIG. 15). In this case, as described above, the abutting portion 82c of the arm portion 82b in the second slide portion 72 is located on the distal end portion 21a side of the protruding portion 81g in the first slide portion 71 (see FIG. 11). Further, the arm portion 82b presses the protruding portion 81g by elastic force. For this reason, the movement of the second slide portion 72 toward the base end portion 21b with respect to the first slide portion 71 is restricted to some extent. As a result, as shown in FIG. 12, the first slide portion 71 and the second slide portion 72 The first slide portion 71 and the second slide portion 72 are slid toward the distal end portion 21a in a state where the positional relationship is maintained (the second slide portion 72 is not slid with respect to the first slide portion 71).

  In this case, as described above, the elastic deformation of the arm portion 81b in the first slide portion 71 in the direction away from the inner surface 22c of the main body portion 21 is allowed. For this reason, when the first slide portion 71 is slid from the proximal end portion 21b side to the distal end portion 21a side of the main body portion 21, the arm portion 81b is elastically deformed so that the contact portion 81c gets over the protruding portion 28, As shown in FIGS. 12 and 13, the protrusion 28 is located on the tip 21 a side.

  Subsequently, as shown in FIG. 15, the slide of the first slide portion 71 toward the tip portion 21 a causes the tip portion 71 a of the first slide portion 71 to be the outer peripheral surface 42 a of the second case 42 in the second clamp portion 32. , The second clamp portion 32 rotates in a direction in which the tip portions 31a and 32a of the clamp portions 31 and 32 are closed (in the direction of the arrow R2 shown in the figure).

  Here, in the clamp sensor 3, the first clamp part 31 is disposed at the distal end part 21 a of the main body part 21 in a non-movable state, and the second clamp part 32 is rotatable so that the distal end of the main body part 21 can be rotated. When the first slide portion 71 is slid toward the tip end portion 21 a of the main body portion 21, the tip end portion 71 a of the first slide portion 71 is placed on the outer peripheral surface 42 a of the second clamp portion 32. The second clamp portion 32 is rotated in a direction in which the tip portions 31a and 32a of the clamp portions 31 and 32 are closed in contact with each other. For this reason, in the clamp sensor 3, the tip portions 31a, 32a of the clamp portions 31, 32 are not moved (moved along the length direction of the main body portion 21) with respect to the main body portion 21. It is possible to perform a closing operation to close each other. Therefore, in the clamp sensor 3, unlike the configuration in which the clamp portion moves with respect to the main body portion 21 in accordance with the closing operation, the electric wire 200 is prevented from being detached from the clamp portions 31 and 32 during the closing operation. Since it is not necessary to perform an operation of adjusting the position of the clamp sensor 3 with respect to 200 (moving the clamp sensor 3), it is possible to improve the operability accordingly.

  Further, in the clamp sensor 3, the support shaft 27 is provided on the side surface 23b side with respect to the center C of the annular body R formed by the clamp portions 31 and 32, so that the side surface 23a side with respect to the center C of the annular body R is provided. Compared with the configuration in which the support shaft 27 is provided, the point of action of the force applied from the first slide portion 71 to the outer peripheral surface 42a of the second clamp portion 32 and the rotation center (support shaft) 27 position) can be shortened. For this reason, in the clamp sensor 3, the second clamp part 32 can be largely rotated with a small slide amount of the first slide part 71.

  Next, as shown in FIG. 15, the first slide portion 71 is slid until the tip portions 31 a and 32 a of the clamp portions 31 and 32 are closed (abut each other). In this case, in the clamp sensor 3, a force for sliding the first slide portion 71 is applied to the outer peripheral surface 42 a of the second clamp portion 32 to rotate the second clamp portion 32, thereby the clamp portions 31, 32 is in a closed state. For this reason, in this clamp sensor 3, the biasing force of the spring is applied in the direction in which the tip portions 31a and 32a are closed, and the tip portions 31a and 32a are closed only by the spring biasing force. A situation in which the tip portions 31a and 32a are not completely closed due to a lack of the biasing force of the spring is avoided, and the tip portions 31a and 32a can be reliably closed.

  In this case, as described above, when the first slide portion 71 is slid to the distal end portion 21a side, the contact portion 81c of the arm portion 81b is positioned on the distal end portion 21a side of the projection portion 28 (FIG. 12). reference). Further, the contact portion 81c presses the protrusion 28 by the elastic force of the arm portion 81b. For this reason, the slide of the 1st slide part 71 of the direction (direction of arrow X2 shown to the figure) which goes to the base end part 21b side of the main-body part 21 will be in the temporary lock state which is regulated to some extent (temporarily regulated).

  Further, in the clamp sensor 3, in the closed state, the flat surface portion 42b parallel to the length direction of the main body portion 21 (the slide direction of the first slide portion 71) and the tip end portion 71a are in contact (FIG. 5). reference). For this reason, in the clamp sensor 3, in the closed state, the pressing force that acts on the distal end portion 71a of the first slide portion 71 from the flat portion 42b of the second clamp portion 32 by the biasing force of the spring 73 is the first slide portion. It is acting in a direction orthogonal to the slide direction of 71 (or a direction substantially orthogonal). That is, it is possible to eliminate (or reduce) the pressing force from the second clamp portion 32 in the sliding direction of the first slide portion 71 (direction in the direction of the arrow X2 shown in FIG. 15). Therefore, in this clamp sensor 3, even if the fingertip is released from the first slide portion 71 in the temporarily locked state, the first slide portion 71 slides toward the base end portion 21 b side of the main body portion 21 to release the temporarily locked state. It is possible to prevent the situation with certainty.

  Subsequently, as shown in FIG. 12, the second slide unit 71 is slid in the state in which the first slide unit 71 is slid to the distal end portion 21 a side of the main body unit 21 (while maintaining the temporary lock state of the first slide unit 71). 72 is slid to the base end 21b side of the main body 21 (the direction of the arrow X2 shown in the figure). At this time, the arm portion 82b of the second slide portion 72 is elastically deformed so that the contact portion 82c gets over the projection portion 81g of the first slide portion 71, and as shown in FIG. 13, the base end portion of the projection portion 81g. Located on the 21b side.

  Further, as shown in FIG. 13, as the second slide portion 72 slides toward the base end portion 21 b, the restricting portion 82 d of the second slide portion 72 approaches (or comes into contact with) the arm portion 81 b of the first slide portion 71. Thus, elastic deformation of the arm portion 81b in a direction away from the inner surface 22c of the main body portion 21 is restricted. In this state, even if a force toward the base end portion 21 b is applied to the first slide portion 71, the elastic deformation of the arm portion 81 b is restricted, and the contact portion 81 c of the arm portion 81 b Since it is difficult to get over the protruding portion 28, the sliding of the first slide portion 71 toward the base end portion 21b is reliably restricted. Thereby, the 1st slide part 71 transfers to the full lock state from which the slide to the direction of arrow X2 is reliably controlled from a temporary lock state.

  Thus, the clamping of the electric wire 200 is completed. Next, the clamp portions 31 and 32 (the first sensor 51 and the second sensor 52) of the clamp sensor 3 detect magnetism generated by the current flowing through the electric wire 200 and output a detection signal.

  Subsequently, the operation unit 12 is operated to instruct the start of measurement. At this time, the control unit 14 controls the measurement unit 11 to execute measurement processing. In this measurement process, the measurement unit 11 calculates the current (measurement amount for the clamp target) flowing in the electric wire 200 based on the detection signal output from the clamp sensor 3 (magnetism as a detection amount detected by the clamp sensor 3). taking measurement. Next, the control unit 14 controls the display unit 13 to display the value of the current measured by the measurement unit 11. Thus, the measurement of the current flowing through the electric wire 200 is completed.

  Here, the clamp sensor 3 includes a second slide portion 72 that regulates the slide of the first slide portion 71, in addition to the first slide portion 71 that rotates the second clamp portion 32, and the opening / closing mechanism 61 is provided. It is configured. For this reason, even if the 1st slide part 71 contacts a certain object during use of the clamp sensor 3 (detection of a detection amount), the 1st slide part 71 is maintained in the state which does not slide. Therefore, in the clamp sensor 3 and the current measuring device 1, the clamped state in which the clamp target (the electric wire 200) is clamped is released unexpectedly, and as a result, the detection of magnetism as the detection amount and the current as the measurement amount The situation where the measurement is interrupted is prevented.

  On the other hand, when the measurement is completed and the clamp of the electric wire 200 is released, as shown in FIG. 12, the second slide portion 72 is moved to the distal end portion 21a side of the main body portion 21 (the direction of the arrow X1 shown in the figure). Slide to. At this time, as shown in the figure, the restricting portion 82d of the second slide portion 72 is brought into a state in which it does not approach and abut against the arm portion 81b of the first slide portion 71, and thereby, from the inner surface 22c of the main body portion 21. As a result of allowing the elastic deformation of the arm portion 81b in the separating direction, the first slide portion 71 is allowed to slide (the first slide portion 71 cannot be slid (the locked state is released)).

  Subsequently, as shown in FIG. 11, the first slide portion 71 is slid together with the second slide portion 72 toward the base end portion 21 b of the main body portion 21 (in the direction of the arrow X <b> 2 shown in FIG. 11). At this time, the distal end portion 71a of the first slide portion 71 that is in contact with the outer peripheral surface 42a of the second case 42 is separated from the outer peripheral surface 42a. At this time, due to the biasing force of the spring 73, the second clamp portion 32 rotates in a direction in which the tip portions 31a and 32a of the clamp portions 31 and 32 are separated from each other (direction of arrow R1 shown in FIG. 14). Thereby, as shown to the figure, the clamp parts 31 and 32 will be in an open state. Next, the clamp sensor 3 (clamp portions 31, 32) is separated from the electric wire 200 so that the electric wire 200 is released from the gap between the tip portions 31 a, 32 a of the clamp portions 31, 32. Thus, measurement of the current flowing through the electric wire 200 is completed.

  As described above, in the clamp sensor 3 and the current measuring device 1, the second tip end portions 31 a and 32 a of the clamp portions 31 and 32 are closed in the second direction when they are slid to the tip end portion 21 a side of the main body portion 21. A first slide portion 71 that rotates the clamp portion 32, and a slide of the first slide portion 71 when the first slide portion 71 is slid toward the proximal end portion 21b while being slid toward the distal end portion 21a. The opening / closing mechanism 61 is configured to include a second slide portion 72 that regulates and maintains the closed state of the tip portions 31a and 32a. For this reason, according to the clamp sensor 3 and the current measuring device 1, unlike the configuration in which the second slide portion 72 that restricts the slide of the first slide portion 71 is not provided, for example, the clamp sensor 3 is being used (detected) Even if the first slide portion 71 comes into contact with any object during the amount detection), the first slide portion 71 can be maintained in a non-sliding state. Therefore, according to the clamp sensor 3 and the current measuring device 1, the clamp state in which the clamp target is clamped (the closed state in which the tip portions 31a and 32a of the clamp portions 31 and 32 are closed) is contrary to the intention. As a result, it is possible to reliably prevent a situation where the detection of magnetism as a detection amount and the measurement of current as a measurement amount are interrupted. Further, in the clamp sensor 3 and the current measuring device 1, the sliding direction of the first slide portion 71 and the sliding of the first slide portion 71 when the tip portions 31a and 32a of the clamp portions 31 and 32 are closed are restricted. Since both of the sliding directions of the second slide part 72 at the time can be made the direction along the length direction of the main body part 21 (that is, the same direction), the operability can be sufficiently improved.

  Further, according to the clamp sensor 3 and the current measuring device 1, when the second slide portion 72 is slid to the base end portion 21 b side, the regulating portion 82 d comes into contact with the arm portion 81 b of the first slide portion 71. By restricting the sliding of the first slide portion 71 by restricting the elastic deformation of the arm portion 81b in the direction away from the inner surface 22c, an unallowable sliding of the first slide portion 71 is possible with a simple configuration. It is possible to reliably switch between the locked state and the main locked state that restricts the sliding of the first slide portion 71.

  Further, according to the clamp sensor 3 and the current measuring device 1, the protrusion 81 g is formed on the inner surface 81 f of the side wall 81 e of the first slide portion 71, and the abutment portion 82 c is provided at the distal end portion. Since the second slide portion 72 is configured by including an elastically deformable arm portion 82b provided on the slide portion main body 82a so as to extend toward the portion 21a side, the second slide portion due to vibration of the clamp sensor 3 or the like. 72 slides can be prevented. For this reason, according to the clamp sensor 3 and the current measuring device 1, it is possible to reliably prevent a situation where the unlocked state and the locked state are unexpectedly switched by vibration of the clamp sensor 3 or the like.

  Further, in the clamp sensor 3 and the current measuring device 1, the slide of the first slide portion 71 is restricted when the second slide portion 72 is slid to the base end portion 21 b side of the main body portion 21. That is, in the clamp sensor 3 and the current measuring device 1, the slide direction of the first slide portion 71 and the slide of the first slide portion 71 when the tip portions 31a and 32a of the clamp portions 31 and 32 are closed with each other are determined. The direction of the slide of the second slide part 72 at the time of regulation can be made opposite to each other. For this reason, according to the clamp sensor 3 and the current measuring device 1, even if a force toward the base end portion 32b, which is a direction to release the clamped state, is applied to the second slide portion 72, the first slide portion 71 As a result of surely maintaining the main lock state that regulates the slide, it is possible to more reliably prevent a situation where the clamp state is released unexpectedly.

  Further, according to the clamp sensor 3 and the current measuring device 1, the operation protrusion 81 h of the first slide portion 71 is positioned closer to the distal end portion 21 a side of the main body portion 21 than the operation protrusion 82 e of the second slide portion 72. Since the first slide portion 71 and the second slide portion 72 are arranged in such a manner, for example, when the second slide portion 72 is slid toward the distal end portion 21a side of the main body portion 21, the slide of the first slide portion 71 is performed. In the case of adopting the restricting configuration, when the clamp sensor 3 is used in a place where an obstacle exists in front, the first slide portion 71 makes contact between the operation projection 82e of the second slide portion 72 and the obstacle. Since this can be guarded by the operation projection 81h, it is possible to reliably prevent a situation in which the second slide portion 72 is slid by contact and the main lock state is released. Door can be.

  Further, according to the clamp sensor 3 and the current measuring device 1, the operation protrusion 82e of the second slide portion 72 is formed smaller than the operation protrusion 81h of the first slide portion 71. The clamp sensor 3 is used in a place where there is an obstacle ahead when a configuration is adopted in which the slide of the first slide portion 71 is restricted when the second slide portion 72 is slid toward the distal end portion 21a side of the portion 21. In this case, the contact between the operation protrusion 82e of the second slide portion 72 and the obstacle can be more reliably guarded by the operation protrusion 81h of the first slide portion 71. The situation where 72 is slid and this lock state is cancelled | released can be prevented more reliably.

  Note that the configurations of the clamp sensor and the measuring apparatus are not limited to the above configurations. For example, instead of the first slide part 71 and the second slide part 72 described above, a configuration including a first slide part 171 and a second slide part 172 shown in FIGS. In this configuration, as shown in FIG. 16, the first slide is performed when the second slide portion 172 is slid to the base end portion 21 b side (one end portion or the other end portion) of the main body portion 21. The sliding of the portion 171 is allowed, and as shown in FIG. 17, the first sliding portion 172 is slid to the distal end portion 21 a side (the other end side of the one end portion and the other end portion) of the main body portion 21. The slide of the slide part 171 is regulated. Further, in this configuration, similarly to the above configuration including the first slide portion 71 and the second slide portion 72, the operation projection portion 181 h of the first slide portion 171 is the operation projection portion of the second slide portion 172. The 1st slide part 171 and the 2nd slide part 172 are arrange | positioned so that it may be located in the front-end | tip part 21a side rather than 182e. In this configuration, the operation protrusion 182e is formed smaller than the operation protrusion 181h. However, the operation protrusion 181h is formed smaller than the operation protrusion 182e. A configuration in which the protrusions 181h and 182e are formed to have the same size may be employed.

  Moreover, the structure provided with the 1st slide part 271 and the 2nd slide part 272 shown to FIG. 18, 19 is also employable. In this configuration, as shown in FIG. 18, when the second slide part 272 is slid to the tip part 21 a side (one end part or the other end part) of the main body part 21, the first slide part 271 is allowed to slide, and as shown in FIG. 19, the first slide portion 272 is slid to the base end 21 b side (the other end of the one end and the other end) of the main body 21. The slide of the slide part 271 is regulated. Further, in this configuration, the first slide portion 271 and the second slide are arranged such that the operation projection portion 281 h of the first slide portion 271 is positioned closer to the base end portion 21 b than the operation projection portion 282 e of the second slide portion 272. A portion 272 is disposed. Further, in this configuration, the operation protrusion 282e is formed smaller than the operation protrusion 281h.

  Moreover, the structure provided with the 1st slide part 371 and the 2nd slide part 372 shown to FIG. 20,21 is also employable. In this configuration, as shown in FIG. 20, when the second slide portion 372 is slid to the distal end portion 21 a side (one end portion or the other end portion) of the main body portion 21, the first slide portion is provided. When the slide 371 is allowed and the second slide portion 372 is slid to the base end 21b side (the other end of the one end and the other end) of the main body 21 as shown in FIG. The slide of the slide part 371 is regulated. Further, in this configuration, the first slide portion 371 and the second slide are arranged such that the operation projection portion 381h of the first slide portion 371 is positioned closer to the base end portion 21b than the operation projection portion 382e of the second slide portion 372. A portion 372 is disposed. Further, in this configuration, the operation protrusion 382e of the second slide portion 372 is larger than the operation protrusion 381h of the first slide portion 371 (or both protrusions 382e and 381h have the same size). ), And when the first slide portion 71 is slid toward the distal end portion 21a, the operation projection portion 382e of the second slide portion 372 can be used.

  Moreover, the structure provided with the 1st slide part 471 and the 2nd slide part 472 shown to FIG. 22, 23 is also employable. In this configuration, as shown in FIG. 22, the first slide is performed when the second slide portion 472 is slid to the base end portion 21 b side (one end portion or the other end portion) of the main body portion 21. The slide of the portion 471 is allowed, and the first slide portion 472 is slid to the distal end portion 21a side (the one end portion and the other end portion of the other end portion) of the main body portion 21 as shown in FIG. The slide of the slide part 471 is regulated. In this configuration, the first slide portion 471 and the second slide are arranged such that the operation projection portion 481h of the first slide portion 471 is positioned closer to the base end portion 21b than the operation projection portion 482e of the second slide portion 472. A portion 472 is disposed. In this configuration, the operation protrusion 482e is formed smaller than the operation protrusion 481h. However, the operation protrusion 481h is formed smaller than the operation protrusion 482e. A configuration in which the protrusions 481h and 482e are formed in the same size may be employed.

  Further, the configuration example in which the first slide portion 71 (and the first slide portions 171, 271, 371, 471) rotates the second clamp portion 32 has been described above, but the first slide portion 71 (and the first slide portion 71) The slide portions 171, 271, 371, 471) rotate the first clamp portion 31, and the first slide portion 71 (and the first slide portions 171, 271, 371, 471) are clamp portions 31, 32. It is also possible to adopt a configuration in which both of these are rotated. In addition, the configuration example in which the second clamp portion 32 rotates is described above. However, the second clamp portion 32 slides in the same direction as the slide direction of the first slide portion 71, and the electric wire 200 together with the first clamp portion 31. It is also possible to adopt a configuration that clamps.

  In addition, the clamp sensor 3 that detects magnetism as a detection amount has been described as an example, but the detection amount is not limited to magnetism. As an example, the present invention can be applied to a clamp sensor that detects the flow rate and temperature of water flowing in the water pipe and the flow rate and temperature of gas flowing in the gas pipe as detection amounts, with water pipes and gas pipes being clamped.

  In addition, the current measuring device 1 that measures the current as an example of the measurement amount based on the detection amount (magnetism in the above example) detected by the clamp sensor 3 has been described as an example. The present invention can be applied to a measuring apparatus that measures various measurement amounts other than current based on various detection amounts other than.

DESCRIPTION OF SYMBOLS 1 Current measuring device 3 Clamp sensor 11 Measuring part 21 Main body part 21a Tip part 21b Base end part 22a, 22b Main surface 22c Inner surface 25 Guide groove 28 Projection part 31 1st clamp part 31a, 32a Tip part 32 2nd clamp part 61 Opening / closing mechanism 71, 171, 271, 371, 471 First slide part 72, 172, 272, 272, 472 Second slide part 81a Slide part body 81b, 82b Arm part 81c, 82c Abutting part 81d Fitting part 81e Side wall 81f Inner surface 81g Protrusion part 81h to 481h, 82e to 482e Operation protrusion part 82a Slide part main body 82d Restriction part 200

Claims (7)

A main body having a pair of main surfaces facing each other, and at least one of the main bodies is configured to be movable, and the respective front ends are disposed at one end of the main body so as to be opened and closed, and the front ends are closed. A pair of clamp parts configured to be capable of clamping a clamp object in a closed state, and opening and closing each tip part of each clamp part in accordance with an operation and capable of maintaining the closed state between the tip parts A clamp sensor configured to detect a detection amount for the clamp target,
When the opening / closing mechanism is slidably disposed along the length of the main body connecting the other end of the main body and the one end, and is slid to the one end A first slide part that moves at least one of the clamp parts in a direction in which the tip parts of the clamp parts are closed by pressing at least one of the clamp parts;
The first slide portion is configured to be slidable along the length direction, and allows the first slide portion to slide when being slid to either one of the one end portion and the other end portion. When the slide part is slid to the one end part side and is slid to the other side of the one end part and the other end part, the slide of the first slide part is regulated and the tip parts are closed. The clamp sensor provided with the 2nd slide part which maintains a state. A groove portion extending along the length direction is formed on the inner surface of the main surface of the main body portion,
A first protrusion protruding from the inner surface is formed on at least one inner surface of each main surface of the main body,
The first slide part includes a first slide part main body which can be slid along the groove part by fitting the side part to the groove part, and a first contact part is formed at a tip part and the other end part side. The first abutting portion is provided in the first slide portion main body so as to extend toward the inner surface and is elastically deformable in a direction in which the main surface is in contact with or separated from the inner surface, and the first abutment portion is elastically deformed by the first contact portion. A first arm portion that presses the portion, and the first abutment portion is located on the other end portion side of the first projection portion in a state where the first slide portion is slid to the other end portion side. At the same time, when the first slide portion is slid from the other end side to the one end portion side, the first arm portion is elastically deformed, and the first contact portion gets over the first protrusion and It is configured to be located on the one end side of the first protrusion,
The second slide part is configured to be slidable along the length direction in a state of being fitted into a fitting part formed in the first slide part body, and the second slide part. A restricting portion provided so as to extend from the main body to the other end portion side, and when the second slide portion is slid to the one side, the restricting portion is the first portion. While allowing the first slide portion to slide by allowing elastic deformation of the first arm portion in a direction away from the inner surface of the main surface while being maintained in a non-contact state with respect to the one arm portion, When the second slide portion is slid to the other side, the restricting portion approaches or contacts the first arm portion and elastically deforms the first arm portion in a direction away from the inner surface of the main surface. Of the first slide part by regulating Clamp sensor of claim 1, wherein regulating the ride. A second protrusion protruding from the inner surface of the side wall is formed on the inner surface of the side wall constituting the fitting portion of the first slide portion,
The second slide portion has a second abutting portion formed at a tip portion and is provided on the second slide portion main body so as to extend toward the one end portion side and is in contact with the inner surface of the side wall. A second arm portion that is elastically deformable in a separating direction and that presses the second projecting portion with an elastic force, and the second sliding portion is slid toward the other end portion; The contact portion is located on the other end side of the second protrusion, and the second arm portion is elastically deformed when the second slide portion is slid from the other end side to the one end side. The clamp sensor according to claim 2, wherein the second abutting portion is configured to be positioned on the one end side of the second projecting portion over the second projecting portion.   The second slide portion allows the slide of the first slide portion when being slid to the one end side as the one side, and is slid to the other end side as the other side. The clamp sensor according to any one of claims 1 to 3, wherein the clamp sensor regulates the slide of the first slide portion when it is pressed. The first slide portion includes a first operation protrusion for slide operation,
The second slide portion includes a second operation protrusion for slide operation,
The said 1st slide part and the said 2nd slide part are any one of Claim 1 to 4 arrange | positioned so that the said 1st operation protrusion part may be located in the said one end part side rather than the said 2nd operation protrusion part. The clamp sensor according to crab.   The clamp sensor according to claim 5, wherein the second operation protrusion is smaller than the first operation protrusion.   A measuring apparatus comprising: the clamp sensor according to claim 1; and a measurement unit that measures a measurement amount of the clamp target based on the detection amount detected by the clamp sensor.

Images