JP6054204B2 - clip - Google Patents

Description

  The present invention relates to a clip for tightly attaching to a member to be measured. More specifically, the present invention is specified as a member to be measured this time, for example, among a bundle of covered cables as active members composed of a plurality of wires. This is a technique related to a clip used when narrowly arranged in one to obtain necessary electrical data.

  Field measuring instruments that are used for electrical measurement work by bringing them to the measurement site include testers, insulation resistance meters, ground resistance meters, phase detectors, voltage detectors, and clamp ammeters that are prepared according to the purpose. and so on.

  Among these, electrostatic induction detectors such as phase detectors and voltage detectors are provided with sensor electrodes as detectors for detecting electric charge by electrostatic induction from an AC circuit as a charged body to be inspected. In particular, the phase detector is used as a detector for displaying the phase sequence (phase rotation) of an AC three-phase circuit when operating or installing a three-phase device such as an electric motor, a generator, or a relay. .

  That is, for example, when operating a three-phase dielectric motor such as a fan or pump, the phase sequence of the AC three-phase circuit is detected in advance using a phase detector to know in advance whether or not the correct connection has been made. In this way, it is possible to prevent in advance problems caused by reverse rotation.

  In this case, the phase sequence of the AC three-phase circuit by the phase detector is such that, for example, a clip having a structure as shown in FIG. This makes it possible to capture necessary data.

JP 2006-30141 A

  FIG. 9 shows the clip shown in FIG. 6 of Patent Document 1 again. The upper clip piece 2 and the lower clip piece 4 are provided via a support shaft 9 having a torsion coil spring 8 interposed therebetween. As a result, the curved holding portions 3 and 5 that are opened and closed to hold the AC electric circuit as a charged body are normally closed and are pivotally supported in an integral manner, and conductive inside the curved holding portions 3 and 5. The entire clip 1 is configured by including a detector 6 composed of a layer 7. That is, the clip 1 is provided with a non-contact type structure having a shed shape in which the outer side of the detector is covered with an insulating synthetic resin case so as to be covered, and the entirety thereof is formed.

  In this case, since the clip 1 incorporates a torsion coil spring 8 that urges the curved holding portions 3 and 5 to be in a normally closed state, each clip 1 is provided on the side of one covered cable that is being opened. After the curved holding portions 3 and 5 are sent in, the opening operation is canceled, so that the curved holding portions 3 and 5 can be tightly attached to the covered cable.

  However, normally, in the vicinity of the covered cable as the measurement target member at the measurement site, although other covered cables different from the current measurement target member are adjacent to each other, as shown in FIG. In the case of the clip 1 having a simple structure, since the guard electrode for preventing the electrical influence from the other adjacent coated cable side is not provided, the influence wraps around to the detector 6 side. There is a disadvantage that an error occurs in the measured value.

  In the present invention, in view of the above-described problems of the prior art, measurement error does not occur by making it less likely to be electrically influenced by other covered cables when measuring a covered cable specified as a member to be measured this time. An object of the present invention is to provide such a clip.

  The present invention has been made to achieve the above-described object, and each of the tip end portions in which the guard electrode is incorporated is a sandwiching piece portion that can be tightly attached to the covered cable that is a member to be measured. The rear end side is an opening operation piece part, and a spring material is interposed on a support shaft that is rotatably connected to each other at a substantially central position, and the clamping piece parts are urged together in a normally closed direction. A pair of clip pieces made of an insulating resin material disposed opposite each other, and a detector for detecting electric charge by electrostatic induction is provided inside the guard electrode of at least one of the sandwiching piece portions on the lead cord side. In the clip formed by being connected to the bending piece portion provided with the detector, the bending extending portion which is wound around so as to cover the front end surface side of the other holding piece portion when closed, and the bending Incorporate along the extension direction of the extension part The most important feature that is provided with said guard electrode having an extended guard portion.

  In this case, the sandwiching piece portion including the curved extending portion can be provided with a widened portion having a wider lateral width than that of the other sandwiching piece portion. In this case, it is preferable that the guard electrode includes an extended guard portion that is included in the widened portion.

  Moreover, the said clamping piece part containing the said curved extending | stretching part can also be equipped with the 1 or more row | line | column raised part protruded along the length direction of the outer surface.

  Further, the holding piece portion on the side not provided with the detector can be formed to have a width wider than the width on the opening operation piece side, and the guard electrode can be made wider and included. In this case, the holding piece portion may have a width equal to the width of the holding piece portion on the side including the detector.

  According to the invention of claim 1, when the clip is tightly attached to the covered cable that is the member to be measured this time, the sandwiching piece portion including the curved extension portion and the guard electrode including the extension guard portion rotate around the clip. Since it can be arranged so as to be enclosed in a substantially circular shape, it is possible to prevent the detector side from being electrically exposed by the guard electrode including the extension guard portion, thereby reaching an electrical disturbance to the detector. This can reduce the cause of measurement error.

  Further, in this case, the sandwiching piece portion including the curved extension portion can also function as an obstacle that prevents the covered cable other than the measurement target member from approaching the detector from the tip direction of the clip. By physically separating the coated cables other than those from the detector side, it is possible to reduce the influence of electrical disturbance.

  According to the second aspect of the present invention, the sandwiching piece portion including the curved extending portion includes the widened portion that extends wider than the lateral width of the other sandwiched piece portion. Occasionally functioning as an obstacle to the covered cable other than the member to be measured that is approaching from both sides of the clip, to physically separate the covered cable from approaching the detector from the side of the clip. Thus, the influence of the electrical disturbance that the detector tends to receive from the side of the clip can be suppressed to such a low level. Moreover, since the contact area with respect to a measurement object member can be increased by providing the widening part in the holding piece part including the curved extension part, the clip can be narrowed under a more stable state.

  According to the invention of claim 3, since the guard electrode is also provided with the extended guard part built in the widened part, it is possible to secure a wide guard area as a result, and as a result, electric disturbance reaches the detector. This can reduce the cause of measurement error more effectively.

  According to invention of Claim 4, since the clamping piece part containing a curved extending part is equipped with the protruding part in the length direction of the outer surface, coating | cover other than the measuring object member which is going to approach from this outer surface direction By functioning as an obstacle to the cable, the coated cable can be physically prevented from approaching from the outer surface direction of the sandwiching piece portion provided with the detector, and the detector can be pulled away from the outer surface direction of the sandwiching piece portion. Therefore, it is possible to reduce the influence of electrical disturbances that tend to be received from the sound.

  According to the invention of claim 5, the holding piece portion on the side not provided with the detector is formed so as to have a width wider than the width on the opening operation piece portion side, and the guard electrode is also formed so as to be embedded therein. Therefore, it is possible to reduce the influence of disturbance by securing a large guard area by the guard electrode.

  In addition, by forming the sandwiching piece portion on the side not provided with the detector wider than the opening operation piece portion, the surface is in wide contact with the covered cable as the measurement target member. As a result of being able to narrow the clip, it is possible to secure a more stable narrowed state by making it difficult for the clip to fall off when subjected to an impact or load.

  According to the invention of claim 6, the holding piece portion on the side not provided with the detector is formed so that the lateral width thereof is equal to the width of the holding piece portion on the side provided with the detector. In addition to the above effects produced by the present invention, a more stable appearance impression rich in robustness can be imparted to the entire clip.

The whole perspective view which shows the 1st example of this invention. Explanatory drawing which shows the cross-section of the principal part of the 1st example shown in FIG. 1 with three covered cables. It is the whole perspective view which shows the 2nd example of this invention, (a) of them shows the case seen from the front, (b) shows the case seen from the back, respectively. Explanatory drawing which shows the principal part structure inside the 2nd example shown in FIG. The whole perspective view which shows the modification of the 2nd example of this invention. The whole perspective view which shows the 3rd example of this invention in the state looked up from the downward direction. Explanatory drawing which shows the cross-section of the principal part of the 3rd example shown in FIG. 6 with one covered cable. The whole perspective view which shows the 4th example of this invention. Explanatory drawing which re-displayed the clip of the half state shown by FIG. 3 of patent document 1. FIG.

  Embodiments of the present invention will be specifically described below in relation to first to fourth examples with reference to the drawings. First, according to FIG. 1 and FIG. 2, the clip 11 of the first example of the present invention is tightly attached to the covered cable A, which is a member to be measured, at the respective distal end side where the guard electrodes 14 and 24 are incorporated. Spring members (not shown) on the support shaft 20 that can be pivotally connected to each other at a substantially central position. The sandwiching piece portions 13 and 23 are urged toward the normally-closed direction by interposing them, and are constituted by a pair of clip pieces 12 and 22 made of an insulating resin material that are integrally disposed to face each other.

  In this case, each of the one clip piece 12 and the other clip piece 22 is formed by being divided in two in the vertical direction, and when they are integrated with each other facing each other, a space portion (FIG. 2) is formed. Then, it is formed as a space portion 31 in the other clip piece 22 located on the lower side.).

  In addition, one clip piece 12 located on the upper side in FIG. 1 is formed with a guard electrode 14 in the space part on the sandwiching piece part 13 side, and is formed at a substantially central part that is a position near the front side of the barrier part 19. In addition to the shaft support holes 16 disposed opposite to both side surfaces, the clamping piece portion 13 is provided in a sawtooth shape on a slightly recessed surface that is the facing surface of the other clip piece 22 to the clamping piece portion 23. The tooth portion 17 is formed, and a plurality of rows of step portions 18 provided on the finger contact surface side of the opening operation piece portion 15 are formed.

  On the other hand, the other clip piece 22 positioned on the lower side in FIG. 1 is formed with the guard electrode 24 in the space 31 positioned on the sandwiching piece portion 23 side, and also in the vicinity of the front side of the barrier portion 29. And a pair of bearing portions 26 disposed opposite to both side surfaces located at a substantially central portion. Each bearing portion 26 includes a through hole (not shown) provided at a position facing the shaft support hole 16 when combined with the other clip piece 12.

  Further, the other clip piece 22 includes a tooth portion 27 provided in a sawtooth shape on a slightly recessed surface that is a surface facing the sandwiching piece portion 13 of the one clip piece 12 in the sandwiching piece portion 23, and an opening operation. A plurality of step portions 28 provided on the finger contact surface side of the one portion 25 are provided.

  For this reason, the pair of clip pieces 12 and 22 are used as the clip 11 by being combined together via the support shaft 20 in a state where the sandwiching piece portions 13 and 23 are urged toward the normally closed direction. Be able to.

  In addition, at least the other clip piece in the clip 11, that is, the clip piece 22 positioned on the lower side in the illustrated example, has a detector 30 that detects charges by electrostatic induction inside the guard electrode 24 in the holding piece portion 23. It is configured by being arranged so as to be electrically connected to the drawing cord 51 side through the substrate 50 on which the detector 30 is mounted.

  Moreover, the clamping piece portion 23 in the clip piece 22 has a curved extending portion 33 that is wound around so as to cover the distal end surface 13a side of the clamping piece portion 13 in one clip piece 12 positioned on the upper side in the illustrated example when the clip piece 22 is closed. I have.

  That is, as is clear from FIG. 1, the curved extending portion 33 is extended from the holding piece portion 23 side so as to protrude from the front end surface 13 a of the holding piece portion 13 in one clip piece 12, and the extension By curving the portion toward the distal end surface 13a, it is formed in a shape that looks like a receiving port.

  In addition, the guard electrode 24 included in the sandwiching piece portion 23 is formed to include an extension guard portion 24 a that is included along the extending direction of the curved extending portion 33. The guard electrodes 14 and 24 are made of a suitable conductive member formed in a thin plate shape, such as a conductive film-like metal material, a conductive sponge material, or a conductive plastic material. Can do. Further, the guard electrodes 14 and 24 may be made to exist by pushing a cushion material such as a sponge material having a rectangular parallelepiped shape into a space (for example, the space 31 shown in FIG. 2).

  3 and 4 show a clip 11 according to a second example of the present invention. The clip 11 of the second example differs from the clip 11 of the first example of the present invention shown in FIG. 1 in the specific configuration of the curved extending portion 33 provided in the holding piece portion 23 of the other clip piece 22. Therefore, only the differences in configuration will be described. Corresponding parts of the same configuration will be denoted by the same reference numerals, and description thereof will be omitted.

  That is, the holding piece part 23 including the curved extending part 33 provided in the clip piece 11 of the second example of the present invention is opposed to the base end 17a side of the tooth part 17 provided in the holding piece part 13 in the one clip piece 12. It is formed with widened portions 34, 34 that are extended in a fan shape so as to be wider than the lateral width of one sandwiching piece portion 13 in the left-right direction from the portion located on the surface.

  And the whole curved extending | stretching part 33 including the widened parts 34 and 34 is extended | stretched from the clamping piece part 23 side so that it may protrude from the front end surface 13a of the clamping piece part 13 in one clip piece 12, and the extension part Is curved to the tip surface 13a side, so that it is formed in a shape that looks like a wide receiving port.

  In addition, it is desirable that the guard electrode 24 in this case is disposed by including the extended guard portion 24b also on the widened portions 34 and 34 side of the curved extending portion 33.

  FIG. 5 shows a clip 11 of a modification of the second example of the present invention. The clamping piece portion 23 including the curved extending portion 33 in this example has a step 36 in the left-right direction from a portion located on the surface facing the proximal end 17a side of the tooth portion 17 provided in the clamping piece portion 13 in one clip piece 12. The widened portions 34, 34 projecting from the lateral width of one sandwiching piece 13 are formed by projecting in a rectangular shape.

  6 and 7 show a clip 11 of a third example of the present invention. The clip 11 of the third example includes the clip 11 of the first example shown in FIG. 1 and the clip 11 of the second example shown in FIG. Since only specific configurations are different, only differences in configuration will be described, and corresponding portions of the same configuration will be denoted by the same reference numerals and description thereof will be omitted.

  That is, according to FIG. 6 and FIG. 7, the clamping piece portion 23 including the curved extending portion 33 provided in the clip 11 of the third example of the present invention is located at the center position in the length direction of the outer surface 23a. A row of raised portions 35 protruding from the surface 23a is provided.

  In this case, the raised portion 35 protrudes in a row on both side edges along the length direction of the outer surface 23a of the sandwiching piece portion 23 including the curved extending portion 33, or in the length direction of the outer surface 23a. It is also possible to project a plurality of rows of three or more rows.

  FIG. 8 shows a clip 11 according to a fourth example of the present invention. Note that the clip 11 of the fourth example is different from the clip 11 of the second and third examples in the specific configuration of the clamping piece 13 in the clip piece 12 located on the upper side in the illustrated example. Therefore, only differences in configuration will be described, and corresponding parts of the same configuration will be denoted by the same reference numerals and description thereof will be omitted.

  In other words, the holding piece 13 on the side of the clip piece 12 that does not include the detector 30 is formed with a width wider than the width on the opening operation piece 15 side. In this case, the sandwiching piece 13 can be formed to be slightly narrower than the lateral width of the sandwiching piece 23 on the side including the detector 30, but the side including the detector 30 as shown in FIG. 8. It is preferable to form it with the same length as the lateral width of the sandwiching piece 23.

  Next, of the present invention configured as described above, first, the operation and effect of the first example will be described. When the clip 11 is not used, one clip piece 12 and the other clip piece 22 are used. Is urged by a spring material (not shown), and the sandwiching pieces 13 and 23 are closed as shown in FIG. 1, for example.

  On the other hand, during use, the operator pushes the opening operation piece portion 15 of one clip piece 12 and the opening operation piece portion 25 of the other clip piece 22 against the biasing force of the spring material, thereby The pieces 13 and 23 can be expanded to the required opening.

  With respect to the covered cable A that is a measurement target member, the sandwiching piece portions 13 and 23 are sandwiched from a direction substantially orthogonal to the length direction in a state where the sandwiching piece portions 13 and 23 are expanded in this manner. Then, by releasing the pushing force on the opening operation pieces 15 and 25, the holding pieces 13 and 23 can be tightly attached to the covered cable A as shown in FIG. The narrowing operation process described above is the same in the second to fourth examples of the present invention, and hence the operation and effect of these second to fourth examples will be described below in order to avoid redundant description. I will omit it from the explanation.

  In addition, at this time, in FIG. 2, the holding piece portion 23 side including the curved extending portion 33 in the other clip piece 22 located on the lower side is the holding piece portion 13 of the one clip piece 12 located on the upper side. As a result of being arranged in the shape of a receptacle, for example, an extension guard portion 24a included in the holding piece portion 23 including the curved extending portion 33 is included in relation to the covered cable B other than the measurement target member shown in FIG. By suppressing the state where the detector 30 is electrically exposed by the guard electrode 24, it is possible to reduce the arrival of an electrical disturbance to the detector 30 and to reduce the cause of the measurement error. .

  In addition, the sandwiching piece portion 23 including the curved extending portion 33 can also function as an obstacle that prevents the covered cable C other than the measurement target member from approaching the detector 30 from the distal end direction of the clip 11. By physically separating the covered cable C from the detector 30 side, it is possible to reduce the influence of the electrical disturbance.

  Next, the operation and effect of the second example of the present invention will be described. In FIG. 3, the holding piece portion 23 side including the curved extending portion 33 in the other clip piece 22 located on the lower side is shown. Is arranged in the shape of a receptacle with respect to the sandwiching piece portion 13 of the one clip piece 12 located on the upper side, and as a result, the curve is similar to the relationship with the covered cable B other than the member to be measured shown in FIG. By suppressing the detector 30 side from being electrically exposed by the guard electrode 24 including the extended guard portion 24a included in the holding piece portion 23 including the extending portion 33, the electrical connection to the detector 30 can be prevented. It is possible to reduce the arrival of disturbance and to reduce the cause of measurement error.

  In addition, by providing the sandwiching piece portion 23 including the curved extending portion 33 with the widened portions 34, 34, for example, the contact area with the covered cable A as the measurement target member in FIG. The clip 11 can be narrowed under the state.

  Further, when the widened portions 34 and 34 are fanned out as shown in FIG. 3, when narrowing the covered cable A that is the measurement object is released and it is going to be pulled back from the measurement position. It can be pulled back smoothly without being caught by a covered cable other than the object to be measured.

  Further, as shown in FIG. 5, when the widened portions 34, 34 are projected in a rectangular shape through the step 36, the narrowing of the covered cable A as the measurement object is released and the front side from the measurement position is released. When trying to pull back, it can be pulled back smoothly without being caught by a covered cable other than the object to be measured.

  Further, these widened portions 34, 34 function as an obstacle of the covered cable D other than the member to be measured that approaches the both sides 11a, 11b of the clip 11 when tightly attached, so that the covered cable D is shown in FIG. As shown in FIG. 3 (a), the approach to the detector 30 from the side surface direction of the clip 11 can be physically blocked and separated, and the detector 30 tends to be received from both side surfaces 11a and 11b of the clip 11. The influence of electrical disturbance can be kept low.

  In addition, when the guard electrode 24 is also provided with the extended guard portions 24b and 24b provided in the widened portions 34 and 34, a wide guard area can be ensured as a result, and as a result, It is possible to reduce the arrival of disturbance and to reduce the cause of measurement error more effectively.

  Further, the operation and effect of the third example of the present invention will be described. In FIG. 6, the holding piece portion 23 side including the curved extending portion 33 in the other clip piece 22 located on the lower side is As a result of being arranged in the shape of a receptacle with respect to the sandwiching piece portion 13 of the one clip piece 12 located on the upper side, the curved extension as in the relationship with the covered cable B other than the measurement target member shown in FIG. An electrical disturbance to the detector 30 is suppressed by preventing the detector 30 side from being electrically exposed by the guard electrode 24 including the extended guard portion 24a included in the holding piece portion 23 including the portion 33. Therefore, the cause of measurement error can be reduced accordingly.

  When the clip 11 of the third example includes the widened portions 34 and 34 shown in FIGS. 3 and 5, as shown in FIG. By causing the covered cable D to function as an obstacle of the covered cable D other than the measurement target member to be approached from the both side surfaces 11a and 11b, the detector can be detected from the side of the clip 11 as shown in FIG. Therefore, the influence of the electrical disturbance that the detector 30 tends to receive from the direction of the both side surfaces 11a and 11b of the clip 11 can be kept low.

  In addition, in the third example, the sandwiching piece portion 23 including the curved extending portion 33 in the clip piece 22 positioned on the lower side in FIG. 6 includes a raised portion 35 in the length direction of the outer surface 23a. Therefore, as shown in FIG. 7, it can be made to function as an obstacle of the covered cable E other than the member to be measured that is going to approach from the direction of the outer surface 23a.

  Therefore, the raised portion 35 can physically prevent the covered cable E from approaching from the direction of the outer surface 23a of the sandwiching piece portion 23 including the detector 30, so that the detector 30 can be separated from the sandwiching piece portion. It is possible to suppress the influence of electrical disturbance that tends to be received from the outer surface direction.

  Finally, the operation and effect of the fourth example of the present invention will be described. The holding piece 13 on the side not provided with the detector 30 located on the upper side in FIG. Since the guard electrode 14 is formed so as to be wider than the width of the guard electrode 14 and the guard electrode 14 is formed so as to be embedded therein, the influence of the disturbance can be reduced by securing a large guard area by the guard electrode 14. .

  Moreover, by forming the lateral width of the holding piece portion 13 on the side not provided with the detector 30 wider than the lateral width on the opening operation piece portion 15 side, for example, wider than the covered cable A as the measurement target member shown in FIG. As a result of the clip 11 being able to be tightly attached under surface contact, it is possible to ensure a more stable tightly attached state by making it difficult to drop off when subjected to an impact or load.

  Further, when the width of the holding piece 13 on the side not provided with the detector 30 is set to be equal to the width of the holding piece 23 on the side provided with the detector 30, the clip 11 is robust against the entire clip 11. A more stable appearance impression rich in nature can be given.

11 Clip 11a, 11b Side surface 12 Clip piece 13 Holding piece portion 13a Front end surface 14 Guard electrode 15 Opening operation piece portion 16 Shaft support hole 17 Tooth portion 18 Step portion 19 Barrier portion 20 Support shaft 22 Clip piece 23 Holding piece portion 23a Outer surface 24 guard electrode 24a extension guard part 24b extension guard part 25 opening operation piece part 26 bearing part 26a through hole 27 tooth part 28 step part 29 barrier part 30 detector 31 space part 33 bending extension part 34 widening part 35 protuberance part 36 step part 50 Substrate 51 Lead cord A Coated cable (Measuring member)
B, C, D, E Coated cable (non-measurement target member)

Claims (6)

The front end side where the guard electrode is embedded is the clamping piece that can be tightly attached to the covered cable that is the member to be measured, and the rear end side is the opening operation piece, so that they are in the substantially central position. From a pair of clip pieces made of an insulating resin material that are arranged to face each other by interposing a spring material on a pivot shaft that is pivotally connected and urging the clamping pieces in a normally closed direction. In the clip formed by electrically connecting the detector for detecting the electric charge by electrostatic induction to the inside of the guard electrode of either one of the sandwiching piece portions on the lead cord side,
The sandwiching piece portion including the detector is made to exist along the extending direction of the curved extending portion, and a curved extending portion that is wrapped around to cover the tip surface side of the other sandwiching piece portion at the time of closing. And a guard electrode having an extended guard portion. 2. The clip according to claim 1, wherein the sandwiching piece portion including the curved extending portion includes a widened portion having a lateral width that is wider than a lateral width of the other sandwiching piece portion. The clip according to claim 2, wherein the guard electrode includes an extended guard portion that is embedded in the widened portion. The clip according to any one of claims 1 to 3, wherein the sandwiching piece portion including the curved extension portion includes one or more raised portions protruding along the length direction of the outer surface thereof. 5. The sandwiching piece portion on the side not provided with the detector is formed to have a width wider than that of the opening operation piece side, and the guard electrode is also made wider and included. The clip of crab. The clip according to claim 5, wherein the holding piece portion on the side not provided with the detector has a width equal to a width of the holding piece portion on the side provided with the detector.

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