JP2011085461A - Clamp sensor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reliably keep a connection state between tips during measurement, and also release the connection state by simple operation. <P>SOLUTION: The clamp sensor includes: a first sensor 2 having a first coil housing section 21 and a grip 22; a second sensor 3 which has a second coil housing section 31 and a lever 32 and is turnably connected to the first sensor 2; and a locking mechanism 4 for locking the second sensor 3 in a rotation-restricted manner. The locking mechanism 4 includes: a locking member 33 which is turnably arranged with a support shaft 34 provided in the lever 32 as the center; a recess 23b for restricting the rotation of the locking member 33 by fitting one end 33a of the locking member 33 in the connection state between tips 21a, 31a of the coil housing sections 21, 31; a spring member 24 for biasing the one end 33a toward the bottom of the recess 23b; and a locking release button 36 for releasing the rotation-restricted state of the locking member 33 by drawing the one end 33a fit into the recess 23b out of the recess 23b. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a clamp sensor including a first sensor and a second sensor rotatably connected to the first sensor.

  As this type of clamp sensor, a clamp sensor disclosed by the applicant in Japanese Patent Laid-Open No. 10-213598 is known. This clamp sensor includes a movable side sensor and a fixed side sensor having a core holder in which a magnetic core is accommodated, two torsion coil springs, and the like. In this case, both sensors are pivotally supported by a pivot inserted into the bearing portion so as to be freely opened and closed. Each torsion coil spring has a coil spring portion fitted into the bearing portion, and an open one end portion and an open other end portion are respectively hooked by the movable side sensor and the fixed side sensor to urge both sensors. . For example, this sensor is connected to a current measuring device and used to measure the current flowing through the cable in a non-contact manner by clamping the cable so as to surround the cable.

JP-A-10-213598 (page 3, Fig. 1-2)

  However, the above clamp sensor has the following problems to be improved. That is, in this clamp sensor, only the urging force of the torsion coil spring is maintained so that the distal ends of the movable side sensor and the fixed side sensor are joined to each other (the clamp sensor is closed). However, for example, when clamping a large-diameter cable or a hard cable, when these cables come into contact with both sensors, a large force is exerted in the direction in which the tips of both sensors are separated from each other (the direction in which both sensors are opened). In such a case, it is difficult to maintain the tip portions of both sensors in a joined state with only the urging force of the torsion coil spring, and as a result, accurate measurement values may be difficult. is there. Further, when the clamp is increased in size, the weight of the sensor also increases, and in this case as well, there is a possibility that it is difficult to maintain the joined state between the tip portions of the sensor only by the urging force of the torsion coil spring. .

  The present invention has been made in view of such a problem to be improved, and provides a clamp sensor that can reliably maintain the joined state between the tips during measurement and can release the joined state with a simple operation. The main purpose.

  In order to achieve the above object, a clamp sensor according to claim 1 includes a first coil housing portion in which a substantially arc-shaped coil is housed and a grip portion that is continuously provided on the base end side of the first coil housing portion. 1 sensor, the 2nd coil accommodating part in which the substantially arc-shaped coil was accommodated, and the lever part connected in the base end part side of the said 2nd coil accommodating part, and the base end part of the said lever part, and the said grip A second sensor coupled to the first sensor so as to be rotatable about a coupling shaft inserted through a base end of the component, and for gripping the grip part and the lever part and releasing the grip A clamp sensor in which the tip portions of the two coil receiving portions come into contact with and away from each other as the second sensor rotates in response, and includes a lock mechanism that locks the second sensor in a rotation restricted state; One end of the lock mechanism is A locking member that is disposed on the support portion and is pivotable about a support shaft provided on the lever portion in a state where the other end portion is located on the distal end side of the lever portion, and the grip portion A recess formed to fit the one end of the lock member to restrict the rotation of the lock member in the joined state of the tip portions of the two coil housing portions; A spring member that biases the one end of the lock member toward the bottom of the recess, and the one end of the lock member that is disposed at the other end of the lock member and is fitted in the recess. And a release member that is pulled out from the recess and releases the rotation restricted state of the lock member.

  The clamp sensor according to claim 2 is the clamp sensor according to claim 1, wherein the one end portion of the lock member is configured by a sliding member, and the concave portion is capable of fitting the sliding member as the one end portion. It is configured.

  The clamp sensor according to claim 3 is the clamp sensor according to claim 1 or 2, wherein the one end portion of the lock member pulled out from the concave portion is provided in the grip portion. A guide surface that guides the one end portion is formed to be connected to the edge portion between a standby position where the front end portions are separated from each other and a standby position side edge portion of the opening of the concave portion.

  According to a fourth aspect of the present invention, in the clamp sensor according to the third aspect, the guide surface is formed such that a distance from the connecting shaft is constant at any position of the guide surface. .

  The clamp sensor according to claim 5 is the clamp sensor according to claim 3 or 4, wherein the grip portion has a virtual extension surface of the guide surface at the end of the guide surface on the standby position side. A support surface that supports the one end of the lock member is connected to the end of the guide surface in a state in which the tip ends of the two coil housing portions are separated from each other in a direction away from the connection shaft. Is formed.

  According to the clamp sensor of the first aspect, the lock member disposed so as to be rotatable about the support shaft provided in the lever portion and the one end portion of the lock member are fitted to restrict the rotation of the lock member. A recess that urges one end of the lock member toward the bottom side of the recess, and a lock that releases the one end of the lock member fitted in the recess from the recess to release the rotation restriction state of the lock member For example, in a state where the electric wire is clamped, one end of the lock member is fitted into the recess to restrict the rotation of the lock member, and thereby the rotation of the lock member is restricted via the support shaft. Therefore, the movement of the lever portion supporting the lock member toward the first sensor, that is, the rotation of the second sensor in the direction in which the tip portions of both coil housing portions are separated from each other can be reliably restricted. Therefore, according to this clamp sensor, unlike the conventional configuration in which the tip portions of both coil housing portions are joined only by the urging force of the spring, the tip portions are separated from each other in a state where the electric wire is clamped. Even if force is applied in the direction, as long as the force is not large enough to deform or break the recess or lock member, it is possible to reliably prevent the tip portions from separating from each other and to ensure the joining state between the tip portions. Can be maintained. Moreover, according to this clamp sensor, the joining state of each front-end | tip part of both coil accommodating parts can be cancelled | released by simple operation which only presses the lock release button arrange | positioned at the other end part of the lock member. . Further, according to this clamp sensor, after the operation of pressing the lock release button, the grip operation for gripping the grip portion and the lever portion can be continuously performed in that state, so that the operability is sufficiently improved. Can be improved.

  According to the clamp sensor of the second aspect, since the one end portion of the lock member is formed of the sliding member, the sliding member is fitted into the concave portion, and the sliding member is pulled out from the concave portion, that is, the second sensor is locked. And unlocking can be performed smoothly.

  According to the clamp sensor of the third aspect, one end of the lock member that moves with the rotation of the second sensor when releasing the gripping operation and joining the tip portions of the two coil housing portions together. Since the portion can be guided along the guide surface to the recess reliably and smoothly, the second sensor can be reliably locked in the rotation restricted state.

  Further, according to the clamp sensor of the fourth aspect, the guide member is formed so that the distance from the connecting shaft is constant at any position, so that the lock member rotates as the second sensor rotates. Since the distance between the one end of the lock member pressed against the guide surface by the biasing force of the spring member and the connecting shaft can be kept constant, the lock member and the second sensor can be smoothly rotated. Can do. In addition, since the distance between the one end of the lock member and the connecting shaft is kept constant during the rotation of the lock member accompanying the rotation of the second sensor, the lock member relative to the second sensor at this time is maintained. Rotation (movement) is avoided. For this reason, it is possible to reliably prevent a situation in which the release member disposed at the other end portion of the lock member is pushed back due to the relative rotation of the lock member and the user feels uncomfortable.

  According to the clamp sensor of the fifth aspect of the present invention, the support surface that is inclined in the direction away from the connecting shaft with respect to the virtual extension surface at the end portion on the standby position side of the guide surface is connected to the end portion of the guide surface. As a result of the formation, the one end of the lock member is supported by the support surface in a state where the tips of the two coil housing portions are separated from each other, and all or part of the urging force of the spring member is received by the support surface. Since the gripping state can be canceled or the gripping force can be loosened by the amount of the urging force to be encircled and the work to be clamped can be performed, the operability can be further improved.

2 is a plan view of the clamp sensor 1. FIG. 2 is a plan view showing a configuration of a clamp sensor 1. FIG. FIG. 6 is a perspective view showing configurations of a lock member 33 and a support portion 23. FIG. 5 is a first explanatory diagram illustrating the operation of the clamp sensor 1. It is the 2nd explanatory view explaining operation of clamp sensor 1. FIG. 6 is a third explanatory diagram for explaining the operation of the clamp sensor 1. FIG. 6 is a fourth explanatory view for explaining the operation of the clamp sensor 1. 2 is a plan view showing a configuration of a clamp sensor 101. FIG. 5 is a perspective view showing a configuration of a support portion 123. FIG. FIG. 6 is a first explanatory diagram for explaining the operation of the clamp sensor 101. FIG. 6 is a second explanatory diagram explaining the operation of the clamp sensor 101.

  Embodiments of a clamp sensor according to the present invention will be described below with reference to the accompanying drawings.

  First, the configuration of the clamp sensor 1 will be described with reference to the drawings. A clamp sensor 1 shown in FIG. 1 is, for example, a clamp-type sensor used when measuring the current flowing through the electric wire 100 in a non-contact manner, and includes a first sensor 2, a second sensor 3, and a lock mechanism 4 (FIG. 2). Reference) is configured. In addition, the clamp sensor 1 is configured so that the second sensor 3 is operated in accordance with an operation for gripping the grip portion 22 of the first sensor 2 and a lever portion 32 of the second sensor 3 and an operation for releasing the grip state. 2, and with the rotation of the second sensor 3, the distal end portion 21 a of the first coil housing portion 21 in the first sensor 2 and the distal end portion 31 a of the second core housing portion 31 in the second sensor 3. It is comprised so that and may touch.

  As shown in FIG. 1, the first sensor 2 includes a first case 11 and a coil 12. The first case 11 is composed of a pair of case halves (only one of them is shown in FIGS. 2 to 11) that can be fitted to each other, and accommodates the coil 12 in the fitted state of both case halves. A first coil housing portion 21 having a substantially arcuate space in plan view and a grip portion 22 connected to the base end portion 21b side of the first coil housing portion 21 are configured.

  Further, as shown in FIG. 2, a support portion 23 and a spring member 24 that constitute a part of the lock mechanism 4 are disposed on the grip portion 22 of the first sensor 2. The support portion 23 is formed with a recess portion 23b for fitting a bearing 35 of a lock member 33 (to be described later) to restrict the rotation of the lock member 33 in a joined state between the tip portions 21a and 31a of the coil housing portions 21 and 31. (See FIGS. 5 and 7). In this case, the recess 23b is formed in a semicircular shape (U-shape) in plan view that is recessed toward the tip 22a side (see FIG. 2) of the grip portion 22. Further, as shown in FIG. 5, a guide surface 23a for guiding is formed on the support portion 23. In this case, the guide surface 23a has a standby position P (see FIG. 6) in which the bearing 35 pulled out from the recess 23b waits in a state in which the tip portions 21a and 31a of the coil housing portions 21 and 31 are separated from each other. It has a function of guiding the bearing 35 between the opening and the edge on the standby position P side, and is formed so as to be connected to the edge on the standby position P side in the opening of the recess 23b. Further, the guide surface 23a is arranged so that the distance from the connecting shaft 5 that connects the first sensor 2 and the second sensor 3 is constant at any position, that is, a circle in plan view with the connecting shaft 5 as the center. It is formed in an arc shape.

  The spring member 24 is an example of a spring member that constitutes a part of the lock mechanism 4, and is configured by a coil spring. As shown in FIG. 2, the one end 24 a is engaged with one end 33 a of the lock member 33. At the same time, the other end 24b is engaged with the tip 22a of the grip 22 and the one end 33a of the lock member 33 faces the bottom of the recess 23b (that is, the tip 22a of the grip 22). Energize (pull).

  As an example, the coil 12 includes a coil main body in which a winding is wound around a core, an insulating case (none of which is shown) that covers the outside of the coil main body, and a shield 12a that is attached to the outer side of the insulating case. (See FIG. 2) and the plan view is formed in a substantially arc shape (substantially arc shape). Moreover, the coil 12 is accommodated in the 1st coil accommodating part 21 of the 1st case 11, as shown in the figure, detects magnetism, and outputs a detection signal.

  As shown in FIG. 1, the second sensor 3 includes a second case 13 and a coil 14. The second case 13 is composed of a pair of case halves (only one of them is shown in FIGS. 2 to 11) that can be fitted to each other, and accommodates the coil 14 in the fitted state of both case halves. A second coil housing part 31 having a substantially arcuate space in plan view and a lever part 32 connected to the base end part 31 b side of the second coil housing part 31 are configured. The second sensor 3 is connected to the first sensor 2 so as to be rotatable about a connecting shaft 5 inserted through the base end portion 32b of the lever portion 32 and the base end portion 22b of the grip portion 22 of the first sensor 2. Has been.

  Further, as shown in FIGS. 2 and 3, the lever portion 32 of the second sensor 3 is provided with a lock member 33 that is composed of two plate members and constitutes a part of the lock mechanism 4. In this case, as shown in FIG. 2, the lock member 33 is formed in an M shape in plan view as an example, and one end portion 33 a (the right end portion in the figure) is formed on the grip portion 22 of the first sensor 2. In the state where the other end portion 33b is located on the distal end portion 32a side of the lever portion 32 of the second sensor 3, the lever portion 32 (specifically, the connection shaft 5 and the distal end portion 32a of the lever portion 32) The second sensor 3 is supported via the support shaft 34 so as to be rotatable about the support shaft 34 provided in the middle. As shown in FIGS. 2 and 5, a pair of bearings 35 serving as sliding members are rotatably disposed at one end 33 a on the connecting shaft 5 side of the lock member 33. That is, the one end portion 33a of the lock member 33 is constituted by a sliding member. As shown in FIG. 2, an unlock button (release member) 36 constituting a part of the lock mechanism 4 is disposed at the other end 33 b of the lock member 33. In this case, the lock release button 36 rotates the lock member 33 and pulls out the bearing 35 fitted in the concave portion 23b of the support portion 23 of the first sensor 2 from the concave portion 23b, thereby restricting the rotation of the lock member 33. Used when canceling. Further, as shown in the figure, the lock release button 36 is exposed to the outside of the lever part 32 from an opening part 32c formed in the tip part 32a of the lever part 32 at the tip part (the upper left part in the figure). is doing.

  For example, the coil 14 includes a coil body in which a winding is wound around a core, an insulating case (none of which is shown) that covers the outside of the coil body, and a shield 14a that is attached to the outside of the insulating case. (See FIG. 2) and the plan view is formed in a substantially arc shape (substantially arc shape). Moreover, the coil 14 is accommodated in the 2nd coil accommodating part 31 of the 2nd case 13, as shown in the figure, detects a magnetism, and outputs a detection signal.

  The lock mechanism 4 includes the support portion 23, the spring member 24, the lock member 33, the support shaft 34, the bearing 35, and the lock release button 36, and the tip portions 21a and 31a of the coil receiving portions 21 and 31 are connected to each other. In the joined state, the second sensor 3 has a function of locking in the rotation restricted state.

  Next, the usage method of the clamp sensor 1 is demonstrated with reference to drawings.

  For example, when measuring the current value of the current flowing through the electric wire 100 shown in FIG. 6 using the clamp sensor 1, the cable of the clamp sensor 1 is connected to a measuring device (none of which is shown), Next, a predetermined operation is performed on the measuring device side. In this clamp sensor 1, as shown in FIG. 2, the one end 33 a of the lock member 33 is pulled toward the distal end 22 a side of the grip portion 22 by the contraction force of the spring member 24. It is biased in the direction of arrow A (the direction of turning clockwise about the connecting shaft 5). For this reason, in the state which is not holding the grip part 22 of the 1st sensor 2, and the lever part 32 of the 2nd sensor 3, as shown in the figure, the front-end | tip of the 1st coil accommodating part 21 in the 1st sensor 2 The portion 21a and the distal end portion 31a of the second coil housing portion 31 in the second sensor 3 are joined to each other. Further, in this state, the one end portion 33a of the lock member 33 is pulled toward the tip end portion 22a side of the grip portion 22, so that the bearing 35 disposed at the one end portion 33a of the lock member 33 as shown in FIG. However, it fits into the recess 23b of the support 23.

  Next, an opening operation for separating the distal end portion 21 a of the first coil housing portion 21 in the first sensor 2 from the distal end portion 31 a of the second coil housing portion 31 in the second sensor 3 is performed. Specifically, first, a finger is put on the grip portion 22 of the first sensor 2 and the lever portion 32 of the second sensor 3, and then, as shown in FIG. 4, the other end portion 33 b of the lock member 33 is disposed. The unlocking button 36 is pressed (pushed) in the direction of arrow C (direction toward the grip portion 22). At this time, as shown in the figure, the lock member 33 is rotated in the direction of arrow E (counterclockwise about the support shaft 34) by pressing the lock release button 36. Further, as shown in FIG. 5, as the lock member 33 rotates, the bearing 35 disposed at the one end portion 33 a of the lock member 33 is pulled upward against the contraction force of the spring member 24.

  Next, when the lock release button 36 is further pressed, the lock member 33 is further rotated, and accordingly the bearing 35 is pulled out from the recess 23 b of the support portion 23. Thereby, the rotation restricting state (locked state) of the second sensor 3 is released. Subsequently, the grip portion 22 and the lever portion 32 are gripped while the pressed state with respect to the lock release button 36 is maintained. At this time, as shown in FIG. 6, the second sensor 3 rotates in the direction of arrow B (direction rotating counterclockwise about the connecting shaft 5) against the contraction force of the spring member 24, As the second sensor 3 rotates, the tip portions 21a and 31a of the coil housing portions 21 and 31 are separated from each other. In this case, the lock member 33 rotates with the rotation of the second sensor 3, and as a result, the bearing 35 disposed on the lock member 33 guides the support portion 23 as shown in FIG. 7. Guided by the surface 23a, the second sensor 3 (lock member 33) moves in the rotational direction.

  Subsequently, as shown in FIG. 6, in a state where the electric wire 100 is surrounded by both the sensors 2 and 3, the gripping state between the grip portion 22 and the lever portion 32 is released (the gripping force is loosened) and the lock is applied. The press on the release button 36 is released. At this time, the second sensor 3 is rotated in the direction of arrow A shown in FIG. Further, the lock member 33 is rotated with the rotation of the second sensor 3, and the bearing 35 of the lock member 33 is guided by the guide surface 23 a of the support portion 23 along with the rotation of the second sensor 3, and directed toward the opening of the recess 23 b. Move. Next, when the second sensor 3 is further rotated and the tip portions 21a and 31a of the coil housing portions 21 and 31 are joined to each other, as shown in FIG. 5, the bearing 35 is positioned at the opening of the recess 23b. To do. Thereby, the electric wire 100 is clamped by the first sensor 2 and the second sensor 3. Next, the one end 33a of the lock member 33 is pulled toward the bottom of the recess 23b by the contraction force of the spring member 24, so that the bearing 35 is fitted into the recess 23b as shown in FIG. Is restricted. In this case, the lock member 33 is supported by the second sensor 3 (lever part 32) via a support shaft 34 provided on the lever part 32 of the second sensor 3. Therefore, the movement of the lever portion 32 supporting the lock member 33 toward the first sensor 2, that is, the direction in which the tip portions 21 a and 31 a of the coil housing portions 21 and 31 are separated from each other (arrows shown in FIG. 2). The rotation of the second sensor 3 in the direction (B) is restricted. Therefore, in a state where the electric wire 100 is clamped, the second sensor 3 is locked in the rotation restricted state by the lock mechanism 4.

  Here, in the conventional configuration in which the tip portions 21a and 31a of the coil housing portions 21 and 31 are joined only by the urging force of the spring, the tip portion 21a is clamped when a large-diameter cable or a hard cable is clamped. , 31a may be easily separated from each other when a force greater than the biasing force of the spring is applied in a direction in which the two members 31a separate from each other. On the other hand, in the clamp sensor 1, as described above, in the state where the electric wire 100 is clamped, the bearing 35 of the lock member 33 is fitted into the recess 23b, and the rotation of the lock member 33 is restricted. 2 The sensor 3 is locked in the rotation restricted state. For this reason, in this clamp sensor 1, even if a force is applied in a direction in which the tip portions 21a and 31a are separated from each other, unless the force is large enough to deform or destroy the recess 23b or the lock member 33, Separation between the tip portions 21a and 31a is reliably prevented, and the joined state between the tip portions 21a and 31a is reliably maintained.

  Next, both the sensors 2 and 3 detect the magnetism generated from the electric wire 100 by the current flowing through the electric wire 100 and output a detection signal. Next, the measuring device measures the current value of the current flowing through the electric wire 100 based on the detection signal. In this case, as described above, since the joining state of the tip portions 2a and 3a in the two coil housing portions 21 and 31 is reliably maintained, the clamp sensor 1 reliably detects the magnetism. Is measured accurately.

  As described above, according to the clamp sensor 1, the lock member 33 disposed so as to be rotatable about the support shaft 34 provided in the lever portion 32 and the one end portion 33 a (bearing 35) of the lock member 33 are provided. A recess 23b that is fitted to restrict the rotation of the lock member 33, a spring member 24 that biases one end 33a of the lock member 33 toward the bottom side of the recess 23b, and a lock member 33 that is fitted in the recess 23b. Since the lock mechanism 4 including the lock release button 36 for releasing the rotation restriction state of the lock member 33 by pulling the one end portion 33a from the recess 23b is provided, the lock member 33 can be One end 33a is fitted into the recess 23b, and the rotation of the lock member 33 is restricted, thereby supporting the lock member 33 via the support shaft 34. The movement of the lever portion 32 toward the first sensor 2, that is, the rotation of the second sensor 3 in the direction in which the tip portions 21 a and 31 a of the coil housing portions 21 and 31 are separated from each other can be reliably restricted. . Therefore, according to the clamp sensor 1, unlike the conventional configuration in which the tip portions 21a and 31a of the coil receiving portions 21 and 31 are joined only by the urging force of the spring, the electric wire 100 is clamped. Even if a force is applied in the direction in which the tip portions 21a and 31a are separated from each other, as long as the force is not large enough to deform or destroy the recess 23b or the lock member 33, the tip portions 21a and 31a Separation can be reliably prevented, and the joined state between the tip portions 21a and 31a can be reliably maintained. Moreover, according to this clamp sensor 1, each front-end | tip part 21a, 31a of both the coil accommodating parts 21 and 31 is easy by only pressing the lock release button 36 arrange | positioned at the other end part 33b of the lock member 33. The joint state between each other can be released. Further, according to the clamp sensor 1, after the operation of pressing the lock release button 36, the gripping operation for gripping the grip portion 22 and the lever portion 32 can be continuously performed in that state. Can be sufficiently improved.

  Further, according to the clamp sensor 1, since the one end portion 33a of the lock member 33 is configured by the bearing 35 as an example of the sliding member, the bearing 35 is fitted into the recess 23b and the bearing 35 is pulled out from the recess 23b. That is, the second sensor 3 can be smoothly locked and unlocked.

  Moreover, according to this clamp sensor 1, in the state where each front-end | tip part 21a and 31a of both the coil accommodating parts 21 and 31 is separated, the standby position P and the recessed part 23b where the one end part 33a (bearing 35) of the lock member 33 waits. By forming the guide surface 23a for guiding the one end portion 33a between the opening and the edge on the standby position P side, the gripping operation is released and both the coil housing portions 21, 31 are formed. When the tip portions 21a and 31a are joined together, the one end portion 33a that moves as the second sensor 3 rotates can be reliably and smoothly guided to the recess portion 23b along the guide surface 23a. Therefore, the second sensor 3 can be reliably locked in the rotation restricted state.

  Further, according to the clamp sensor 1, the guide surface 23 a is formed so that the distance from the connecting shaft 5 is constant at any position, so that the lock member 33 can be moved along with the rotation of the second sensor 3. During rotation, the distance between the one end portion 33a (bearing 35) of the lock member 33 pressed against the guide surface 23a by the biasing force of the spring member 24 and the connecting shaft 5 can be maintained constant. 33 can be smoothly rotated. In addition, since the distance between the one end portion 33a of the lock member 33 and the connecting shaft 5 is kept constant when the lock member 33 is rotated along with the rotation of the second sensor 3, the second sensor 3 at this time is maintained. The relative rotation (movement) of the lock member 33 with respect to is avoided. For this reason, it is reliably prevented that the lock release button 36 disposed at the other end portion 33b of the lock member 33 is pushed back due to the relative rotation of the lock member 33 and the user feels uncomfortable. can do.

  In addition, the clamp sensor 101 shown in FIGS. 8-11 is also employable. The clamp sensor 101 includes a support portion 123 instead of the support portion 23 described above. As shown in FIG. 9, the support portion 123 is formed with a recess 23 b similar to the above-described support portion 23. In addition, the support portion 123 is formed with a guide surface 23a that is connected to an edge portion on the standby position P (see FIG. 8) side in the opening of the recess 23b. In this case, the guide surface 23 a of the support portion 123 is defined such that the length along the moving direction of the bearing 35 is shorter than the guide surface 23 a of the support portion 23 described above. Further, a support surface 23c is formed on the support portion 123 so as to be connected to an end portion on the standby position P side of the guide surface 23a (upper right end portion in FIG. 9). In this case, as shown in the figure, the support surface 23c is inclined in a direction away from the connecting shaft 5 with respect to the virtual extension surface 23d of the guide surface 23a at the end of the guide surface 23a on the standby position P side. Is formed.

  In the clamp sensor 101, as described above, the rotation restricting state of the second sensor 3 is released by pressing the lock release button 36, and then the grip portion 22 is maintained while maintaining the pressed state with respect to the lock release button 36. And the lever portion 32, the lock member 33 is rotated with the rotation of the second sensor 3, and the bearing 35 of the lock member 33 is guided to the guide surface 23 a of the support portion 23 with this rotation. The second sensor 3 moves in the rotational direction. Next, when the grip portion 22 and the lever portion 32 are further gripped and the tip portions 21a and 31a of the coil housing portions 21 and 31 are separated from each other to the maximum extent, as shown in FIG. Located above the guide surface 23a.

  Here, when the pressing on the lock release button 36 is released in this state, only the lock member 33 is rotated in the direction of the arrow F shown in FIG. 10 by the contraction force of the spring member 24, as shown in FIG. The bearing 35 abuts on the support surface 23c of the support portion 23 and is supported by the support surface 23c. In this state, since the rotation of the lock member 33 in the direction of the arrow F is restricted, the rotation of the second sensor 3 in the direction of the arrow A is also restricted. For this reason, each front-end | tip part 21a, 31a of both the coil accommodating parts 21 and 31 is maintained in the separated state.

  Subsequently, in a state where the electric wire 100 is surrounded by the sensors 2 and 3, the lock release button 36 is pressed again to rotate the lock member 33 in the direction of arrow E (see FIG. 8), and the bearing 35 is moved to the guide surface 23a. Located above. Subsequently, the gripping state between the grip portion 22 and the lever portion 32 is released while maintaining the pressed state with respect to the lock release button 36. At this time, the second sensor 3 is rotated in the direction of the arrow A shown in the figure by the contraction force of the spring member 24, and the lock member 33 is also rotated accordingly.

  Next, the pressure on the lock release button 36 is released in a state where the bearing 35 is in contact with the guide surface 23 a of the support portion 23. At this time, when the bearing 35 is guided by the guide surface 23a of the support portion 23 and moves toward the opening portion of the recess 23b, and the tip portions 21a and 31a of the coil receiving portions 21 and 31 are joined together, The bearing 35 is fitted into the recess 23b. Thereby, while the electric wire 100 is clamped by the 1st sensor 2 and the 2nd sensor 3, the 2nd sensor 3 is locked to a rotation control state. As described above, in the clamp sensor 101, one end of the lock member 33 is released by releasing the pressure on the lock release button 36 in a state in which the distal end portions 21a and 31a of the coil housing portions 21 and 31 are separated from each other to the maximum extent. The portion 33a is supported by the support surface 23c, and the urging force (contraction force) of the spring member 24 is received by the support surface 23c. Therefore, even if the gripping state is released (or even if the gripping force is loosened), the distal end portions 21a and 31a of the two coil housing portions 21 and 31 can be maintained in a separated state. Since the operation | work which surrounds the electric wire 100 in a state can be performed, operativity can further be improved.

  In the description of the usage method of the clamp sensor 101 described above, the distal end portions 21a and 31a of both the coil housing portions 21 and 31 are maintained apart from each other (the bearing 35 is brought into contact with the support surface 23c of the support portion 23). ) After that, the example in which the lock release button 36 is pressed to release the state (separation maintaining state) and the tip portions 21a and 31a are joined is described above, but the separation maintaining state is released by other methods. You can also. Specifically, the lever portion 32 is rotated in the direction opposite to the direction of the arrow E (see FIG. 8) to release the separation maintaining state. In this case, when the lock member 33 is rotated in accordance with the rotation of the lever portion 32 in this direction, the bearing 35 in contact with the support surface 23 c of the support portion 23 resists the contraction force of the spring member 24. Then, it is moved along the support surface 23c toward the end portion (joint portion with the guide surface 23a) of the support surface 23c. Next, when the bearing 35 is moved to the guide surface 23a side over the joint portion with the guide surface 23a, the bearing 35 is guided to the guide surface 23a of the support portion 23 and moves toward the opening portion of the recess 23b. To do. Then, when each front-end | tip part 21a and 31a joins, the bearing 35 is engage | inserted by the recessed part 23b, and the 2nd sensor 3 is locked to a rotation control state.

  Moreover, although it described above about the example which comprised the spring member 24 with the coil spring, it can replace with a coil spring and the structure which uses a torsion coil spring is also employable. Further, the example in which the bearing 35 is disposed on the one end portion 33a of the lock member 33 (the one end portion 33a is configured by the bearing 35) has been described above, but instead of the bearing 35, for example, a columnar non-rotating body is replaced with the one end portion 33a. It is also possible to employ a configuration in which the one end portion 33a itself is formed of a material having a small friction coefficient. Further, the shape of the lock member 33 can be arbitrarily defined.

DESCRIPTION OF SYMBOLS 1,101 Clamp sensor 2 1st sensor 3 2nd sensor 4 Connecting shaft 12, 14 coils 21 1st coil accommodating part 21a, 31a Tip part 21b, 31b Base end part 22 Grip part 23, 123 Support part 23a Guide surface 23b Recessed part 23c Support surface 23d Virtual extension surface 24 Spring member 31 2nd coil accommodating part 32 Lever part 33 Lock member 33a One end part 33b Other end part 34 Support shaft 35 Bearing 36 Lock release button P Standby position

Claims (5)

A first sensor having a first coil housing part in which a substantially arc-shaped coil is housed and a grip part connected to the base end side of the first coil housing part, and a second coil in which the substantially arc-shaped coil is housed It has a lever portion connected to the base end side of the housing portion and the second coil housing portion, and rotates around a connecting shaft inserted through the base end portion of the lever portion and the base end portion of the grip portion. A second sensor movably connected to the first sensor, and the coils as the second sensor is rotated in response to gripping of the grip portion and the lever portion and release of the grip. It is a clamp sensor in which each tip part of a storage part contacts and separates,
A lock mechanism for locking the second sensor in a rotation-restricted state;
The lock mechanism is disposed so as to be rotatable about a support shaft provided in the lever portion in a state where one end portion is located on the grip portion and the other end portion is located on the distal end side of the lever portion. A locking member, and a recess that is formed in the grip portion and that fits the one end portion of the locking member in a joined state between the tip portions of the two coil housing portions to restrict the rotation of the locking member; A spring member disposed on the grip portion and biasing the one end portion of the lock member toward the bottom side of the recess portion, and disposed on the other end portion of the lock member and fitted into the recess portion. A clamp sensor comprising: a release member that pulls out the one end portion of the lock member from the recess and releases the rotation restricted state of the lock member. The one end portion of the lock member is constituted by a sliding member,
The clamp sensor according to claim 1, wherein the recess is configured to be capable of fitting the sliding member as the one end.   The grip portion includes a standby position where the one end portion of the lock member pulled out from the recess waits in a state where the tip portions of the two coil housing portions are separated from each other, and the standby position side of the opening of the recess. The clamp sensor according to claim 1, wherein a guide surface that guides the one end portion between the edge portion is connected to the edge portion.   The clamp sensor according to claim 3, wherein the guide surface is formed so that a distance from the connecting shaft is constant at any position of the guide surface.   The grip portions are inclined in a direction away from the connection shaft with respect to a virtual extension surface of the guide surface at an end portion of the guide surface on the standby position side, and the tip portions of the coil housing portions are in contact with each other. The clamp sensor according to claim 3, wherein a support surface that supports the one end portion of the lock member in a separated state is connected to the end portion of the guide surface.

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