JP2007225545A - Auxiliary component for sensor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an auxiliary component for a sensor, which clamps a measuring object surely without lowering detection accuracy, safety and operability. <P>SOLUTION: The component is equipped with a body part 2 constituted mountable on the clip type sensor 100 for clamping the measuring object by a pair of clamping parts 101a, 101b, constituted to assist clamping of the measuring object by the clamping parts 101a, 101b, having a main plate 21 and a pair of side plates 31 erected respectively on both side ends of the main plate 21, and constituted fittable to each tip part 111 of the clamping parts 101a, 101b; and a pair of abutting plates 3a, 3b continuously connected respectively to each edge of both side plates 31 protrusively from both side plates 31 toward the outside. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an auxiliary component for a sensor that is configured to be attachable to a clip-type sensor and assists the holding of a measurement object by the sensor.

A clip disclosed by the applicant in Japanese Patent Application Laid-Open No. 2006-30141 is known as a clip-type sensor that sandwiches a measurement object such as a covered electric wire and detects an electrical parameter in the measurement object. This clip is configured to include a pair of clip portions (one-side clip portion and other-side clip portion) that are coupled via a support shaft and are urged by a torsion coil spring. In this case, each clip portion is formed with a curved holding portion (hereinafter also referred to as “holding portion”), and voltage sensors are respectively disposed inside the holding portions. For example, when measuring a voltage applied to a covered electric wire as a measurement object using this clip, the covered electric wire is held (held) by a holding portion. At this time, a voltage sensor disposed inside the holding unit detects electric charges (electrical parameters). In this case, the voltage applied to the covered electric wire can be measured by causing the voltage measuring device to which the clip (voltage sensor) is connected to perform a measurement process based on the detected value.
JP 2006-30141 A (page 4-5, FIG. 3)

  However, the above clip has the following problems. That is, in this clip, the parameter is detected by the sensor in a state where the measurement object is held by the holding unit. In this case, in order to accurately detect the parameter, it is necessary that the measurement object is securely held by the holding unit and the state is maintained until the detected value of the parameter by the sensor is stabilized. . However, in this clip, since the measurement object is clamped only by the biasing force of the torsion coil spring against the clip portion, when a force is applied from the outside to the clip or the measurement object, the clip is against the measurement object. There is a risk that the detection accuracy of the parameter may be lowered or the detection itself may be difficult due to the displacement or the clip coming off the measurement object.

  In this case, a method of securely holding the measurement object by concentrating the urging force on the holding portion using a strong torsion coil spring is conceivable. However, in this method, there is a possibility that the parameter detection accuracy may be lowered due to deformation of the measurement object due to excessive pressure applied to the measurement object. In addition, in this method, since the urging force is increased, a large force is required when opening the holding portion, so that the operability may be deteriorated.

  Further, it is conceivable to increase the contact resistance between the measurement object and the holding part by increasing the width of the holding part so that the measurement object is securely clamped. However, in this method, for example, when an obstacle exists around the measurement object or the length (width) of the measurement object is short, it is difficult to sandwich the measurement object itself.

  On the other hand, a method of binding the holding unit in a state where the measurement object is sandwiched using a binding band or the like is also conceivable. However, in this method, for example, when measuring a large number of measurement points, it is necessary to perform a bundling operation every time the measurement points are changed, so that the work efficiency decreases. In addition, for example, when this method is used when measuring a covered electric wire in a narrow distribution board, there is a risk of causing an electric shock accident. Therefore, it is difficult to employ the various methods described above, and there is a demand for the development of a means that can securely hold the measurement object without employing these methods.

  The present invention has been made in view of such problems, and a main object of the present invention is to provide an auxiliary component for a sensor that can securely clamp a measurement object without deteriorating detection accuracy, safety, and operability. .

  In order to achieve the above object, the auxiliary component for a sensor according to claim 1 is configured to be attachable to a clip-type sensor that sandwiches a measurement object by a pair of sandwiching parts, and sandwiches the measurement object by the sandwiching part. An auxiliary part for a sensor that has a main plate and a pair of side plates erected on both side ends of the main plate, and a main body configured to be fitted to the tip of the clamping unit; A pair of abutment plates that are connected to the edges of the side plates so as to project outward from the side plates;

  The sensor auxiliary component according to claim 2 is the sensor auxiliary component according to claim 1, wherein the contact plate has an arcuate cross-sectional shape in a plane perpendicular to the extending direction of the contact plate. Is formed. In this case, “arc shape” means not only an arc but also a shape obtained by cutting out a part of a circle or an ellipse.

  According to a third aspect of the present invention, there is provided the sensor auxiliary component according to the first or second aspect. The sensor auxiliary component according to the first or second aspect is configured such that an abutment surface of the abutment plate abuts on the abutment surface of the abutment plate that abuts the measurement object. A streak-like uneven portion extending along the direction is formed.

  A sensor auxiliary component according to a fourth aspect of the present invention is the sensor auxiliary component according to any one of the first to third aspects, wherein an inner surface of the side plate of the main body is provided in the clamping portion of the sensor. A recess that can be fitted to the protruding portion is formed.

  According to the auxiliary component for a sensor according to claim 1, the main body configured to be fitted to the front end of the sandwiching portion of the sensor, and the edges of the both side plates so as to project outward from the both side plates of the main body. By providing a pair of abutting plates connected to the respective parts, the contact area when the measurement object is clamped can be sufficiently widened only by fitting the main body part to the tip part of the clamping part. Therefore, the contact resistance with the measurement object can be sufficiently increased accordingly. For this reason, sensor auxiliary parts can be attached without using means such as increasing the biasing force of the coil spring, increasing the width of the clamping surface of the sensor, or binding the clamping part with a binding band or the like. It is possible to reliably prevent the positional deviation between the sensor and the measurement object and the detachment of the sensor from the measurement object. Therefore, according to this sensor auxiliary component, the measurement object can be securely held without deteriorating the detection accuracy, safety, operability and the like due to the adoption of these means.

  Further, according to the auxiliary component for a sensor according to claim 2, the contact plate is formed so as to have an arcuate cross-sectional shape in a plane orthogonal to the protruding direction of the contact plate. When sandwiching the circular measurement object, the contact area between the contact surface of the contact plate and the outer peripheral surface of the measurement object can be sufficiently widened.

  According to the auxiliary component for a sensor according to claim 3, the streaky uneven portion extending along the protruding direction of the contact plate is formed on the contact surface of the contact plate. It is possible to more reliably prevent the sensor and the auxiliary parts for the sensor from slipping.

  According to the auxiliary component for a sensor according to claim 4, the concave portion that can be fitted to the protrusion provided in the clamping portion of the sensor is formed on the inner surface of the side plate of the main body portion, so that the distal end portion of the clamping portion When the main body portion is fitted to the front end portion, the front end portion and the main body portion can be accurately positioned, and the separation between them can be reliably regulated.

  Hereinafter, the best mode of an auxiliary component for a sensor according to the present invention will be described with reference to the accompanying drawings.

  First, the configuration of the sensor auxiliary component 1 (hereinafter also simply referred to as “auxiliary component 1”) will be described with reference to the drawings. An auxiliary component 1 shown in FIG. 1 is an example of a sensor auxiliary component according to the present invention, and is configured to be attachable to a sensor 100 as shown in FIG.

  Here, the sensor 100 is an example of a clip-type sensor according to the present invention. As shown in FIGS. 1 and 2, a pair of sandwiching portions 101a and 101b (hereinafter referred to as “the sandwiching portion 101” when they are not distinguished from each other). And a voltage applied to the object to be measured (inductive voltage proportional to the voltage) applied to the object to be measured (for example, the covered electric wire 200 shown in FIG. 4). Is configured to be detectable by a voltage sensor (not shown) housed inside the clamping portions 101a and 101b. In this case, as shown in FIGS. 1 and 2, the outer surface of each tip portion 111 in the sandwiching portions 101 a and 101 b (hereinafter, this surface is also referred to as “outer surface 112”) is the width direction of the sandwiching portions 101 a and 101 b. In an orthogonal plane, the tip 111 is formed to have an arcuate cross-sectional shape that curves with a predetermined curvature so as to protrude in the opening direction in the opening / closing direction. In addition, the inner surface of each tip portion 111 that sandwiches the measurement object (hereinafter, this surface is also referred to as “clamping surface 113”) is orthogonal to the width direction of the clamping portions 101a and 101b, as shown in both drawings. In the plane, it is formed to have an arcuate cross-sectional shape that is curved with a predetermined curvature so as to be recessed in the opening direction of the tip end portion 111.

  As shown in FIGS. 1 and 2, the sandwiching portions 101 a and 101 b are not shown in the direction in which the respective central portions are connected by the support shaft 102 and the tips of the tip portions 111 are in contact with each other. It is biased by a coil spring. Further, the both side surfaces 114 of the distal end portion 111 in each of the sandwiching portions 101a and 101b are used to align the center of the measurement target body with the center of the sandwiching surface 113 of the distal end portion 111 when the measurement target body is sandwiched. A projection 115 having a triangular shape in plan view that functions as a mark is formed.

  On the other hand, as shown in FIGS. 1 and 2, the auxiliary component 1 includes a main body 2 and a pair of contact plates 3 a and 3 b (hereinafter, also referred to as “contact plate 3” when not distinguished), and sandwiching portions 101 a, It is configured to be able to assist the holding of the measurement object 101b. The main body portion 2 includes a main plate 21 and a pair of side plates 31 erected on both end portions of the main plate 21, and is configured in a bucket shape (shovel shape) as a whole. Further, the main body 2 is configured to be able to be fitted to the distal end portion 111 by fitting the distal end portions 111 of the sandwiching portions 101a and 101b in the sensor 100 into a space 2a formed by the main plate 21 and the side plate 31.

  In this case, as shown in FIGS. 1 and 2, the front end portion 22 of the main plate 21 is formed in a curved surface curved with substantially the same curvature as the outer surface 112 of the front end portion 111 in the sandwiching portions 101 a and 101 b of the sensor 100. . Further, a slit 23 for facilitating the fitting of the main body 2 with the front end portion 111 of the sandwiching portions 101a and 101b is provided along the longitudinal direction of the main plate 21 at the center portion in the width direction of the front end portion 22 of the main plate 21. It is formed to extend.

  On the other hand, the side plate 31 is formed in substantially the same shape as the side surface 114 of the distal end portion 111 in the clamping portion 101 of the sensor 100. Further, a convex portion 32 having a triangular shape in a plan view is formed on the outer surface of the side plate 31, and a concave portion 33 having a triangular shape in a plan view is formed on the back side of the convex portion 32 on the inner surface (the surface on the space 2 a side) of the side plate 31. Has been. In this case, the convex portion 32 aligns the center of the measurement object and the center of the clamping surface 113 in the clamping portions 101a and 101b when the measurement object is clamped with the auxiliary component 1 attached to the sensor 100. It functions as a mark for this purpose, that is, similar to the projection 115 of the sensor 100. Further, the recess 33 is formed so as to be able to be fitted to the protrusion 115 of the sensor 100, and when the main body 2 is fitted to the front end 111 of the sandwiching portions 101a and 101b, the front end 111 and the main body 2 Has a function of positioning the head and a function of regulating the separation between the two.

  In this case, as described above, the distal end portion 22 of the main plate 21 in the main body 2 is formed in a curved shape that is curved with substantially the same curvature as the outer surface 112 of the distal end portion 111 in the sandwiching portion 101, and the side plate 31 is in the sandwiching portion 101. It is formed in substantially the same shape as the side surface 114 of the tip portion 111. For this reason, the above-described space 2 a is formed by the main plate 21 and the side plate 31 in substantially the same shape as the distal end portion 111 of the sandwiching portion 101.

  As shown in FIGS. 1 and 2, the abutting plates 3 a and 3 b are formed in a plate shape and project from the side plate 31 in the main body portion 2 toward the outside so as to extend to the edge of the side plate 31 on the opening surface side. Each one is connected. Further, the contact plates 3a and 3b are substantially the same as the sandwiching surface 113 of the sandwiching portion 101 in the sensor 100 so as to protrude toward the main plate 21 side of the main body 2 in a plane orthogonal to the extending direction of the contact plates 3a and 3b. It is formed to have an arcuate cross-sectional shape that curves with the same curvature.

  Further, when the auxiliary component 1 is attached to the sensor 100, the inner surfaces of the contact plates 3a and 3b that contact the measurement object when the measurement object is held (hereinafter, this surface is also referred to as the “contact surface 41”). A plurality of concavo-convex portions 42 having a mountain-shaped cross section (triangular cross section) extending along the extending direction of the contact plates 3a and 3b. The concavo-convex portion 42 functions as an anti-slip when the measurement object is sandwiched with the auxiliary component 1 attached to the sensor 100. In this case, as described above, the side plate 31 is formed in substantially the same shape as the side surface 114 of the tip portion 111 in the sandwiching portion 101, so that the distance from the outer surface 112 of the tip portion 111 to the sandwiching surface 113, The distance from the inner surface to the contact surface 41 of the contact plates 3a, 3b is substantially the same distance.

  Next, a method for measuring the voltage applied to the covered electric wire 200 as the measurement object using the auxiliary component 1 and the sensor 100 will be described with reference to the drawings.

  First, the auxiliary component 1 is attached to the sensor 100. Specifically, as shown in FIGS. 1 and 2, the auxiliary component 1 is configured such that the tip end portion 111 of one of the sandwiching portions 101 a and 101 b (for example, the sandwiching portion 101 a) of the sensor 100 is fitted into the space 2 a of the main body portion 2. Is pressed against the sandwiching portion 101a. At this time, since the slit 23 is formed at the distal end portion 22 of the main plate 21 in the main body 2, the main plate 21 of the main body 2 is bent by the pressing of the main body 2. For this reason, as a result of the side plate 31 being spread outward, the front end portion 111 of the sandwiching portion 101 a is smoothly fitted into the space 2 a of the main body portion 2.

  Next, the auxiliary component 1 is further pressed against the sandwiching portion 101a. At this time, the protrusion 115 formed on the side surface 114 of the front end portion 111 of the sandwiching portion 101 a is fitted into the recess 33 formed on the inner surface of the side plate 31 of the main body portion 2. Thereby, the main-body part 2 is fitted to the front-end | tip part 111 of the clamping part 101a, and the attachment of the auxiliary component 1 with respect to the clamping part 101a is completed. Next, the auxiliary component 1 is attached to the other of the sandwiching portions 101a and 101b in the sensor 100 (in this case, the sandwiching portion 101b) by the same attachment method as described above.

  In this case, since the space 2a of the main body 2 is substantially the same shape as the front end 111 of the sandwiching section 101, the outer surface 112 of the front end 111 and the main plate 21 of the main body 2 are in close contact with each other, and both side surfaces 114 of the front end 111 are placed. And the side plate 31 of the main body 2 are in close contact with each other, and rattling between the tip 111 and the main body 2 is prevented. Further, since the projection 115 of the tip 111 and the recess 33 of the main body 2 are fitted, the tip 111 and the main body 2 are accurately positioned and their separation is reliably regulated. Further, since the distance from the outer surface 112 of the tip 111 to the clamping surface 113 and the distance from the inner surface of the main plate 21 to the abutting surface 41 of the abutting plates 3a and 3b are substantially the same, as shown in FIG. The clamping surface 113 of the part 101 and the contact surfaces 41 of the contact plates 3a and 3b are substantially flush with each other.

  Next, the lead wire of the sensor 100 is connected to the measuring device. Next, the proximal end portions (the right end portion in FIG. 3) of both the sandwiching portions 101a and 101b are squeezed. At this time, as shown in FIG. 3, both sandwiching portions 101 a and 101 b rotate around the support shaft 102 as a fulcrum, and are attached to the tip portions 111 of the both sandwiching portions 101 a and 101 b and to the tip portion 111, respectively. The auxiliary components 1 are separated from each other (the sensor 100 is in a closed state).

  Next, alignment is performed so that the center of the contact surface 41 of the auxiliary component 1 and the sandwiching surface 113 of the sensor 100 coincides with the center of the covered electric wire 200. In this case, since the convex portion 32 for alignment is formed on the side plate 31 of the main body 2 in the auxiliary component 1, alignment can be easily performed even when the auxiliary component 1 is attached to the sensor 100. It has become. Subsequently, the clamped state of the base end portions of the both sandwiching portions 101a and 101b is released. At this time, both the clamping portions 101a and 101b are rotated in the direction in which the tip portions 111 of the both clamping portions 101a and 101b are close to each other by the urging force of the coil spring not shown in the drawing, as shown in FIG. In addition, the covered electric wire 200 is clamped by the clamping surfaces 113 of the both clamping parts 101a and 101b and the contact surfaces 41 of both auxiliary parts 1.

  Next, a voltage sensor (not shown) in the sensor 100 detects the voltage applied to the covered electric wire 200 and outputs an inspection signal, and the measuring device measures the voltage applied to the covered electric wire 200 based on the detection signal. . In this case, since the contact surface 41 of the auxiliary component 1 is in contact with the covered electric wire 200 in addition to the holding surface 113 of the sensor 100, compared with the case where the covered electric wire 200 is held only by the holding surface 113. As a result of sufficiently widening the area in contact with the electric wire 200, the contact resistance with the covered electric wire 200 is sufficiently large. Therefore, in the sensor 100 to which the auxiliary component 1 is attached, the positional deviation between the covered electric wire 200 and the sensor 100 and the detachment of the sensor 100 from the covered electric wire 200 are reliably prevented. Further, in the auxiliary component 1, the contact plates 3a and 3b are formed so as to have an arcuate cross-sectional shape, and the line-shaped uneven portion 42 extending along the protruding direction of the contact plates 3a and 3b is provided. The contact surface 41 is formed. For this reason, even when a measurement object having a circular cross section such as the covered electric wire 200 is sandwiched, it is possible to reliably prevent the sensor 100 and the auxiliary component 1 from slipping. Therefore, by using the auxiliary component 1, the voltage is accurately detected by the sensor 100.

  As described above, according to the auxiliary component 1, the main body 2 configured to be fitted to the front end portions 111 of the sandwiching portions 101 a and 101 b in the sensor 100 and the both side plates 31 of the main body 2 are stretched outward. By providing the contact plates 3a and 3b connected to the edge portions of the side plates 31 so as to protrude, it is possible to measure only by fitting the main body 2 to the distal end portion 111 of the sandwiching portions 101a and 101b. Since the contact area when sandwiching the body can be sufficiently widened, the contact resistance with the measurement object can be sufficiently increased accordingly. For this reason, without using means such as increasing the urging force of the coil spring, increasing the width of the clamping surface 113 of the sensor 100, or binding the clamping portions 101a and 101b using a binding band or the like. It is possible to reliably prevent the positional deviation between the sensor 100 to which the component 1 is attached and the measurement object and the sensor 100 from being detached from the measurement object. Therefore, according to the auxiliary component 1, the measurement object can be securely held without causing deterioration in detection accuracy, safety, operability, and the like due to the adoption of these means.

  Further, according to the auxiliary component 1, the contact plates 3a and 3b are formed so as to have an arcuate cross-sectional shape in a plane orthogonal to the projecting direction of the contact plates 3a and 3b. When a measurement object having a circular cross section is sandwiched, the contact area between the contact surfaces 41 of the contact plates 3a and 3b and the outer peripheral surface of the measurement object can be sufficiently increased.

  In addition, according to the auxiliary component 1, the streak-like uneven portion 42 extending along the protruding direction of the contact plates 3a and 3b is formed on the contact surface 41, so that the sensor 100 and the auxiliary for the measurement object are formed. The sliding of the component 1 can be prevented more reliably.

  Further, according to the auxiliary component 1, the concave portion 33 that can be fitted to the protruding portion 115 provided in the clamping portions 101 a and 101 b of the sensor 100 is formed on the inner surface of the side plate 31 of the main body portion 2. When the main body portion 2 is fitted to the tip portions 111 of the 101a and 101b, the tip portion 111 and the main body portion 2 can be accurately positioned, and the separation between the two can be reliably controlled.

  In addition, this invention is not limited to said structure. For example, although the example in which the contact surface 41 is formed in a curved surface has been described above, a configuration in which the contact surface 41 is formed in a flat shape may be employed. In addition, although the example in which the uneven portion 42 is formed on the contact surface 41 has been described above, a configuration in which the uneven portion 42 is not formed may be employed. In addition, the example in which the auxiliary component 1 is attached to the sensor 100 configured to be able to detect the voltage has been described above, but it is needless to say that the auxiliary component 1 can be attached to various sensors such as a sensor that detects current and a sensor that detects power. .

FIG. 3 is a perspective view of the auxiliary component 1 and the sensor 100 as viewed from the side plate 31 side of the auxiliary component 1. FIG. 3 is a perspective view of the auxiliary component 1 and the sensor 100 as viewed from the other side plate 31 side of the auxiliary component 1. 2 is a perspective view of the auxiliary component 1 and the sensor 100 in a state where the auxiliary component 1 is attached to the sensor 100. FIG. It is a perspective view of auxiliary component 1 and sensor 100 in the state where covering electric wire 200 was clamped.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Auxiliary part for sensors 2 Main-body part 3a, 3b Contact plate 21 Main plate 31 Side plate 41 Contact surface 42 Concavity and convexity part 100 Sensor 101a, 101b Nipping part 111 Tip part 200 Covered electric wire

Claims (4)

A sensor auxiliary component configured to be attachable to a clip-type sensor that clamps a measurement object by a pair of clamping parts, and assisting the clamping of the measurement object by the clamping part,
A main body having a main plate and a pair of side plates standing on both side ends of the main plate and configured to be fitted to the front end of the clamping portion, and projecting outward from the both side plates And a pair of abutting plates connected to the edges of the both side plates respectively.   The sensor auxiliary component according to claim 1, wherein the contact plate is formed to have an arcuate cross-sectional shape in a plane orthogonal to a protruding direction of the contact plate.   3. The sensor according to claim 1, wherein the contact surface of the contact plate that comes into contact with the measurement object has a streak-like uneven portion extending along a protruding direction of the contact plate. Auxiliary parts.   The sensor auxiliary component according to any one of claims 1 to 3, wherein a concave portion that can be fitted to a protrusion provided in the clamping portion of the sensor is formed on an inner surface of the side plate of the main body portion. .

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