JP2014032874A - Crocodile clip and crocodile clip with cable - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a crocodile clip which does not have continuity between the crocodile clip and a conductive wire, when the crocodile clip does not clamp an object to be clamped.SOLUTION: A crocodile clip comprises a pair of clip pieces elastically energized at tips in a closing direction. A pair of operation input parts are arranged at the opposite end to the tips of the pair of the clip pieces respectively to open the tips against the elastic force, one of the operation input parts are provided with a conductive wire attachment parts for attaching a conductive wire via an insulator so as to interpose a terminal to be connected to one end of the conductive wire between the pair of operation input parts, and the other operation input parts are provided with contact pieces having conductivity so as to be in contact with the terminal when the tips of the clip pieces are opened.

Description

  The present invention relates to an alligator clip and an alligator clip with a cable.

  In factories and power plants, various electrical devices such as switchboards and distance control devices are operating. When inspecting these electrical devices, etc., use alligator clips with cables in which so-called alligator clips are connected to both ends of conductive wires such as cables, and various loads such as motors and lamps in electrical devices are used. The electrodes connected to the power source and the ground are sequentially connected according to a predetermined procedure, thereby confirming the function and operating state of the electrical equipment, the presence or absence of a failure of the display device, and the like.

  However, in such a work, an operator may mistake the electrode for connecting the alligator clip. For example, an operation error such as connecting one alligator clip to the power supply electrode and connecting the other alligator clip to the ground electrode may occur. For this reason, various techniques for detecting such work mistakes quickly and minimizing damage have been developed (see, for example, Patent Document 1).

Japanese Utility Model Publication No. 7-005268

On the other hand, while performing such work, for example, one crocodile clip is connected to the electrode of the power supply, and the other crocodile clip is not connected to any electrode. is there. In this case, the voltage of the power source to which the one alligator clip is connected is applied to the other alligator clip via the cable.
At this time, for example, an operator may accidentally drop the other alligator clip and come into contact with surrounding metal or the like.
For this reason, when the alligator clip does not clamp an object to be clamped such as an electrode, there is a demand for a technique that can prevent the alligator clip and the cable from conducting.

  The present invention has been made in view of the above problems, and when the crocodile clip does not clamp the object to be clamped, the crocodile clip and the crocodile clip capable of preventing electrical connection between the crocodile clip and the cable, and One object is to provide an alligator clip with cable.

  The crocodile clip according to one side is a crocodile clip configured to be elastically biased in a direction in which the tip portions of a pair of clip pieces are closed, in order to open the tip portions against an elastic force. Of the pair of operation input portions provided at the opposite ends to the respective tip portions of the pair of clip pieces, one of the operation input portions has a position sandwiched between the pair of operation input portions, A conductive wire mounting portion for mounting the conductive wire via an insulator is provided so that a terminal connected to one end side of the conductive wire is disposed, and the other operation input portion has a tip of the clip piece. A conductive contact piece is provided so as to come into contact with the terminal when the parts are opened.

  In addition, the problems disclosed by the present application and the solutions thereof will be clarified by the description in the column of the embodiment for carrying out the invention and the description of the drawings.

  When the alligator clip does not clamp the object to be clamped, the alligator clip and the cable can be prevented from conducting.

It is an external appearance side view of the 1st alligator clip of this embodiment. It is a figure which shows the cable mounting part of this embodiment. It is an external appearance side view of the 1st alligator clip of this embodiment. It is an external appearance side view of the 1st alligator clip with a cable of this embodiment. It is an external appearance side view of the 2nd alligator clip with a cable of this embodiment. It is an external appearance side view of the 2nd alligator clip with a cable of this embodiment. It is an external appearance side view of the 2nd alligator clip with a cable of this embodiment. It is an external appearance side view of the 3rd alligator clip with a cable of this embodiment. It is an external appearance side view of the 2nd alligator clip of this embodiment.

  At least the following matters will become apparent from the description of this specification and the accompanying drawings.

== Alligator clip ==
The structure of the alligator clip 100 according to the embodiment of the present invention will be described.
In the following description, the first crocodile clip 101 will be described as an embodiment of the crocodile clip 100 according to the embodiment of the present invention with reference to FIGS. 1 to 3, but the second crocodile clip 102 is also illustrated. This will be described later with reference to FIG.

  The alligator clip 100 can sandwich electrodes arranged on a terminal block connected to a load, a power source, and a ground in an electric device, for example, when inspecting various electric devices operating in a factory or a power plant. It is configured.

  The first alligator clip 101 is attached to one end side of the cable (conductive wire) 200. Although details will be described later, the other first alligator clip 101 or the alligator clip 400 different from the alligator clip 100 of the present embodiment is connected to the other end of the cable 200 so as to be conductive.

  As shown in FIG. 1, the first alligator clip 101 includes a pair of conductive clip pieces (a first clip piece 110 and a second clip piece 120) having conductivity, for example.

  The first clip piece 110 and the second clip piece 120 are connected to each other so as to face each other at a common support shaft (connecting portion) 160. A clip biasing spring 150 that elastically biases the distal end portion of the first clip piece 110 and the distal end portion of the second clip piece 120 in a closing direction is attached to the support shaft 160.

  The first clip piece 110 is formed with a first holding portion 111 for holding an object to be held such as an electrode at a tip portion, and a first operation input portion 112 is provided at an end portion opposite to the tip portion. It is done. The first operation input unit 112 is provided with a first operation input unit cover 116 made of a resin having insulation properties at a portion held by an operator.

  Similarly, the second clip piece 120 has a second holding part 121 for holding an object to be clamped such as an electrode formed at the tip part, and a second operation input part at an end part opposite to the tip part. 122 is provided. The second operation input unit 122 is provided with a resin-made second operation input unit cover 126 having insulating properties at a portion held by the operator.

  The first operation input unit 112 and the second operation input unit 122 are brought close to each other when the gap between the first holding unit 111 and the second holding unit 121 is opened against the elastic force of the clip biasing spring 150. When operated in this manner, the first clip piece 110 and the second clip piece 120 rotate around the support shaft 160 by the action of the lever, and the first holding portion 111 and the second holding portion 121 are separated.

  In addition, the first clamping part 111 and the second clamping part 121 have irregularities for improving the frictional force between the clamped object such as an electrode and preventing the first alligator clip 101 from coming off the clamped object. Is formed.

  As shown in FIG. 2, for example, a resin insulator 130 is attached to the second operation input portion 122 of the second clip piece 120 on the surface facing the first operation input portion 112. The insulator 130 is provided with a cable mounting portion 123 that is detachable by screws 124.

  Then, the cable 200 is inserted between the insulator 130 and the cable mounting portion 123, and the terminal 210 of the cable 200 is disposed at a position sandwiched between the second operation input portion 122 and the first operation input portion 112. The cable 200 is arranged in this manner, and the cable mounting portion 123 is fixed to the second clip piece 120 with the screw 124, so that the insulation between the first alligator clip 101 and the terminal 210 of the cable 200 is secured. It can be attached to the first alligator clip 101.

  On the other hand, as shown in FIG. 1, the first operation input unit 112 of the first clip piece 110 has a first operation input unit 112 and a second operation input unit 122 on the surface facing the second operation input unit 122. When the first holding part 111 and the second holding part 121 are opened, a contact piece 140 having conductivity is provided so as to come into contact with the terminal 210 of the cable 200.

  The contact piece 140 includes a conductive member 141 having conductivity and a contact terminal 142 having conductivity for making contact with the terminal 210 of the cable 200.

  The conductive member 141 is configured by, for example, a conductive spring 141 that spirally extends from the first operation input unit 112 toward the terminal 210 of the cable 200.

  Therefore, as shown in FIG. 3, the first operation input unit 112 and the second operation input unit 122 are brought close to each other, and an object 300 to be held such as an electrode is interposed between the first holding unit 111 and the second holding unit 121. When sandwiched, the contact piece 140 and the terminal 210 of the cable 200 come into contact with each other. Thereby, between the 1st alligator clip 101 and the cable 200 is conducted.

  Further, when the first alligator clip 101 is removed from the object to be clamped 300 and the gap between the first clamping part 111 and the second clamping part 121 is closed, the contact piece 140 becomes the terminal 210 of the cable 200 as shown in FIG. The electrical connection between the first alligator clip 101 and the cable 200 can be interrupted.

  Thus, according to the 1st alligator clip 101 concerning this embodiment, when the 1st alligator clip 101 is not clamping the thing 300 to be clamped, between the 1st alligator clip 101 and the cable 200, It is possible to prevent electrical conduction between them. Conversely, the first crocodile clip 101 and the cable 200 can be made conductive only when the first crocodile clip 101 is holding the object to be clamped 300.

  Note that the cable 200 according to the present embodiment is configured such that the periphery of the conductor is covered with a covering portion 220 having an insulating property, and the inner conductor is exposed from both ends of the covering portion 220. The conductor exposed from both ends of the covering portion 220 may be connected as a terminal 210 with a metal round terminal or Y terminal having conductivity. Further, when a round terminal, a Y terminal, or the like is not connected, an end portion of a conductor inside the covering portion 220 may be used as the terminal 210.

  Specific examples of the cable 200 include a first cable 201 having a configuration in which both ends are directly connected by a single conductor and a covering portion 220, and a second cable 202 having a configuration in which a fuse 230 is interposed on a line between both ends. and so on. Details will be described later.

== Alligator clip with cable ==
Next, an alligator clip with cable 1000 configured by mounting the above-described first alligator clip 101 on at least one end of the cable 200 will be described with reference to FIGS.

  In the following description, a first alligator clip with cable 1001, a second alligator clip with cable 1002, and a third alligator clip with cable 1003 will be described as an example of the alligator clip with cable 1000.

  In the following description, for simplification of description, the same reference numerals are given to the overlapping components, and the description is appropriately omitted.

<First alligator clip with cable>
A first alligator clip 1001 with a cable shown in FIG. 4 is configured by mounting the first alligator clip 101 of this embodiment only on one end side of the first cable 201. An alligator clip 400 different from the alligator clip 100 of this embodiment is attached to the other end of the first cable 201.

  The crocodile clip 400 is different from the crocodile clip 100 of the present embodiment, and the crocodile clip 400 and the cable 200 are always connected to each other regardless of whether the tip of the crocodile clip 400 is open or closed. Yes.

  In the first alligator clip with cable 1001, the alligator clip 400 is connected to the first cable 201 by sandwiching the terminal 210 on the other end side of the first cable 201 with a screw 410. For this reason, the alligator clip 400 and the first cable 201 are always conducted.

  By adopting such a configuration for the first alligator clip 1001 with a cable, for example, the alligator clip 400 holds an electrode connected to a power source, and the first alligator clip 101 is not connected anywhere. Even if it exists, since the contact piece 140 of the 1st alligator clip 101 is separated from the terminal 210 of the 1st cable 201, a power supply voltage is not applied to the 1st alligator clip 101. For this reason, for example, even when the first alligator clip 101 is inadvertently brought into contact with the surrounding metal or the like, it is possible to prevent the occurrence of a short-circuit accident or the like, so that it is possible to improve work safety. Become.

<Second alligator clip with cable>
Next, the second alligator clip 1002 with cable will be described. The second alligator clip 1002 with a cable shown in FIG. 5 includes the first alligator clip 101 and the alligator clip 400 in the same manner as the first alligator clip 1001 with a cable. The mouth clip 101 and the alligator clip 400 are connected by the second cable 202.

  The second cable 202 has a configuration in which a fuse 230 is interposed on a line between both ends with respect to the first cable 201.

  For this reason, the alligator clip 1002 with the second cable shown in FIG. 5 is a case where a current exceeding the rating of the fuse 230 flows between the first alligator clip 101 and the alligator clip 400, for example. By operating the fuse 230, the current between the first alligator clip 101 and the alligator clip 400 can be interrupted. This makes it possible to further improve the safety of work.

  FIG. 6 shows a state where the first crocodile clip 101 is not connected anywhere even though the crocodile clip 400 holds the object 310 such as an electrode.

  In this case, even if the object to be clamped 310 is an electrode connected to a power source, the contact piece 140 of the first alligator clip 101 is separated from the terminal 210 of the second cable 202, so the first alligator A power supply voltage is not applied to the clip 101. Therefore, it is possible to improve the safety of work.

  FIG. 7 shows a state where the first alligator clip 101 holds the object to be clamped 300 and the alligator clip 400 holds the object to be clamped 310.

  In this case, since the contact piece 140 of the first alligator clip 101 is in contact with the terminal 210 of the second cable 202, the object 300 and the object 310 are electrically connected. That is, the operator can establish electrical continuity between the object to be clamped 300 and the object to be clamped 310 by simply clamping the object to be clamped 300 with the first alligator clip 101. For this reason, the worker only needs to perform the work in the same manner as the work using the usual alligator clip, and can perform the work more safely without incurring any other special work load.

  Moreover, since the second cable 202 includes the fuse 230 on the path, it is assumed that the object to be clamped 300 is an electrode connected to the ground, and the object to be clamped 310 is an electrode connected to a power source. Even so, when the fuse 230 is activated, the current between the first alligator clip 101 and the alligator clip 400 can be interrupted.

<Third alligator clip with cable>
Next, the third alligator clip 1003 with cable will be described. A third alligator clip 1003 with a cable shown in FIG. 8 is configured by attaching the first alligator clip 101 to both ends of the second cable 202.

  By configuring the third alligator clip 1003 with a cable in this way, both the first alligator clips 101 can be used only when any of the first alligator clips 101 holds the object 300 or 310 such as an electrode. It becomes possible to conduct between the mouth clips 101.

  For this reason, regardless of which first crocodile clip 101 is connected to any one of the first crocodile clips 101, It is possible not to derive the power supply voltage or the like. Therefore, it is possible to further improve work safety.

== 2nd alligator clip ==
The alligator clip 100 according to the present embodiment can be configured as a second alligator clip 102 as shown in FIG. 9, for example. Similar to the first alligator clip 101, the second alligator clip 102 is also attached to one end of the cable 200 (201, 202).

  In the second alligator clip 102 shown in FIG. 9, for example, a resin insulator 130 is attached to the second operation input portion 122 of the second clip piece 120. Further, the second alligator clip 102 is electrically conductive via the insulator 130. The cable mounting portion 123 is mounted. The second operation input unit 122 and the cable mounting unit 123 are insulated by an insulator 130.

  The cable attachment portion 123 of the second alligator clip 102 is made of a conductive member such as metal, and a cable conduction terminal 125 is formed on one end side, and one end side of the cable conduction terminal 125 is the second operation input portion. It is attached to the second operation input unit 122 so as to be disposed at a position sandwiched between 122 and the first operation input unit 112.

  On the other end side of the cable mounting portion 123, the terminal 210 of the cable 200 is fixed by a screw 124.

  In addition, the first operation input unit 112 of the first clip piece 110 has a first operation input unit 112 and a second operation input unit 122 that are close to the surface facing the second operation input unit 122. A first contact piece 140 </ b> A having conductivity is provided so as to come into contact with one surface of the cable conduction terminal 125 when the holding unit 111 and the second holding unit 121 are opened.

  Similarly, the second operation input unit 122 of the second clip piece 120 has the first operation input unit 112 and the second operation input unit 122 close to each other on the surface facing the first operation input unit 112. A conductive second contact piece 140 </ b> B is provided so as to come into contact with the other surface of the cable conduction terminal 125 when the first clamping unit 111 and the second clamping unit 121 are opened.

  The first contact piece 140 </ b> A includes a conductive member 141 </ b> A having conductivity and a contact terminal 142 </ b> A having conductivity that contacts one surface of the cable conduction terminal 125. The conductive member 141 </ b> A is configured by, for example, a conductive spring 141 </ b> A that spirally extends from the first operation input unit 112 toward one surface of the cable conduction terminal 125.

  The second contact piece 140B includes a conductive member 141B having conductivity, and a contact terminal 142B having conductivity that contacts the other surface of the cable conduction terminal 125. The conductive member 141 </ b> B is configured by, for example, a conductive spring 141 </ b> B that spirally extends from the second operation input unit 112 toward the other surface of the cable conduction terminal 125.

  By configuring the second alligator clip 102 in this way, the first contact piece 140A and the second contact piece 140B can be brought into contact from both sides of the cable conduction terminal 125 that conducts with the cable 200. When the mouth clip 102 clamps the object 300, the second alligator clip 102 and the cable 200 can be more reliably conducted.

  In addition, the second alligator clip 102 and the cable 200 are electrically connected even when the gap between the first holding portion 111 and the second holding portion 121 is not opened as much as in the case of the first alligator clip 101 shown in FIG. It becomes possible to make it. Therefore, even when working in a narrow space with a small work space, or when it is necessary to attach the second alligator clip 102 to a terminal block or the like having a small interval between adjacent electrodes, the work is easy. Can be performed.

  As described above, according to the alligator clip 100 (101, 102) and the alligator clip with cable 1000 (1001, 1002, 1003) according to the present embodiment, when the alligator clip 100 does not sandwich the object to be sandwiched 300. Can prevent conduction between the alligator clip 100 and the cables 200 (201, 202).

  Thereby, it becomes possible to improve the safety of work more. Further, since the worker only has to perform the same work as the work using the usual alligator clip, the safety can be improved without increasing the work load.

  Further, the alligator clip 100 according to the present embodiment has the contact piece 140 connected to the terminals 210 and 125 connected to one end side of the cable 200 when the gap between the first holding part 111 and the second holding part 121 is opened. Although the contact piece 140 is constituted by the spring 141 having conductivity that extends in a spiral shape, even if the thickness of the sandwiched portions 300 and 310 is variously different, The contact state with the cable 200 can be appropriately maintained.

  Further, as the cable 200 to which the alligator clip 100 according to this embodiment is connected and the cable 200 to be used for the alligator clip with cable 1000, the second cable 202 having the fuse 230 on the track is adopted, so that the first It is possible to improve safety when a current exceeding the rating of the fuse 230 flows on the two cables 202.

  These embodiments are for facilitating the understanding of the present invention, and are not intended to limit the present invention. The present invention can be changed and improved without departing from the gist thereof, and equivalents thereof are also included in the present invention.

100 Alligator clip 101 1st alligator clip 102 2nd alligator clip 110 1st clip piece 111 1st clamping part 112 1st operation input part 116 1st operation input part cover 120 2nd clip piece 121 2nd clamping part 122 Second operation input portion 123 Cable attachment tool 124 Screw 125 Cable conduction terminal 126 Second operation input portion cover 130 Insulators 140, 140A, 140B Contact pieces 141, 141A, 141B Conductive members 142, 142A, 142B Contact terminals 150 Clip energizing Spring 160 Spindle 200 Cable 201 First cable 202 Second cable 210 Terminal 220 Cover 230 Fuse 300 First sandwiched object 310 Second sandwiched object 400 Alligator clip 410 Screw 1000 Alligator clip 1001 with cable With first cable Alligator Lip 1002 second alligator clip 1003 third alligator clip with cable with cable

Claims (6)

A crocodile clip configured to be elastically biased in a direction to close ends of a pair of clip pieces,
Of the pair of operation input portions provided at the ends opposite to the tip portions of the pair of clip pieces in order to open the tip portions against the elastic force,
One of the operation input units is a conductive member to which the conductive wire is attached via an insulator so that a terminal connected to one end side of the conductive wire is disposed at a position between the pair of operation input units. A wire mounting part is provided,
The alligator clip, wherein the other operation input portion is provided with a conductive contact piece so as to come into contact with the terminal when the tip ends of the clip pieces are opened. The alligator clip according to claim 1,
The crocodile clip, wherein the contact piece is configured to have a conductive spring that spirally extends from the operation input portion toward the terminal of the conductive wire. The alligator clip according to claim 1 or 2,
The alligator clip, wherein the conductive line is formed by interposing a fuse on the line. A crocodile clip with a cable in which a crocodile clip configured to be elastically biased in a direction to close the tip portions of a pair of clip pieces is attached to both ends of a conductive wire,
At least one of the alligator clips
Of the pair of operation input portions provided at the ends opposite to the tip portions of the pair of clip pieces in order to open the tip portions against the elastic force,
One of the operation input units is a conductive member to which the conductive wire is attached via an insulator so that a terminal connected to one end side of the conductive wire is disposed at a position between the pair of operation input units. A wire mounting part is provided,
A crocodile clip with a cable, wherein the other operation input section is provided with a conductive contact piece so as to come into contact with the terminal when the tip ends of the clip pieces are opened. An alligator clip with a cable according to claim 4,
The alligator clip with a cable, wherein the contact piece includes a spring having conductivity that extends in a spiral shape from the operation input portion toward the terminal of the conductive wire. An alligator clip with a cable according to claim 4 or 5,
The alligator clip with a cable, wherein the conductive wire is formed by interposing a fuse on the track.

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