JP5159282B2 - Voltage test plug - Google Patents

Description

  The present invention relates to a voltage test plug used for a function test and a maintenance check of a voltage circuit of an electric device.

  Voltage test terminals and voltage test plugs are used to perform function tests and maintenance / inspection of voltage circuits of electrical devices such as devices and protective relays arranged on switchboards, etc. Is used to apply the test input using a test device or the like instead. By inserting the voltage test plug into the voltage test terminal, the internal circuit of the electrical device is disconnected from the external voltage circuit, and the test circuit corresponding to the intended functional test and maintenance / inspection is connected to the voltage test plug. .

  As shown in FIG. 10, the conventional voltage test plug 31 includes a plurality of pairs (four pairs in FIG. 10) of contacts 34 provided with an insulating plate 33 protruding from an insulating base 32. A plurality of terminal towers 35 corresponding to the contacts 34 are provided on the surface of the base 32. Each terminal tower 35 includes a base end side terminal 36 in addition to a pair of terminals arranged coaxially including a base end side terminal (power source side terminal) 36 and a tip end side terminal (load side terminal) 37. A proximal end side fastening tool 38 for connecting and fixing the wiring to the distal end side terminal 37 and a distal end side fastening tool 39 for connecting and fixing the wiring to the distal end side terminal 37 are provided. The proximal end side terminal 36 and the distal end side terminal 37 are respectively connected to the corresponding contacts 34 via conductive wires (not shown) embedded in the base body 32.

  When performing a functional test or maintenance / inspection of the voltage circuit of the electric device, an appropriate test circuit is connected to the proximal terminal 36 and the distal terminal 37 according to the purpose, as shown in FIG. A process of connecting the conduction angle 41 having a U-shaped longitudinal section is performed. By fitting the proximal end side terminal 36 and the distal end side terminal 37 into the slit portions 41aa and 41ba of the fixing portions 41a and 41b of the conduction angle 41 and fixing them by the proximal end side fastening tool 38 and the distal end side fastening tool 39. The proximal terminal 36 and the distal terminal 37 are short-circuited.

  On the other hand, a current test plug is used for the function test and maintenance check of the current circuit of the electric device. This current test plug has substantially the same structure as the voltage test plug mainly for economic reasons. . When performing a functional test and maintenance inspection of the current circuit of the electric device, an appropriate test circuit is connected according to the purpose, and the conduction angle 41 shown in FIG. 11 is connected to the proximal end terminal and the distal end side terminal. In addition, a substantially U-shaped short circuit bar 42 for preventing circuit opening shown in FIG. 12 is connected between the proximal terminals of a pair of terminal towers. The short-circuit bar 42 is pushed from one end of the pair of terminal towers facing each other toward the other terminal tower, and the other terminal tower is interposed between the two legs 42a and 42b arranged in parallel with the short-circuit bar 42. By fitting these terminals, the proximal terminals of the pair of terminal towers facing each other are short-circuited.

  By the way, as described above, the voltage test plug and the current test plug have substantially the same structure and are difficult to distinguish from each other in appearance. There is a risk of inserting a voltage test plug subjected to wiring processing for the test plug into the voltage test terminal. When such an error occurs, there is a possibility that inconveniences such as damage to the electric device and power failure occur. In addition, an error is noticed after the wiring process, and the wiring process has to be performed again from the beginning, which sometimes wastes labor. Therefore, in order to avoid such mistakes, the voltage test plug and current test plug have measures such as sticking a plate with precautions to prevent mistakes, but workers have Because of oversight, etc., it could not be said that the accident was completely prevented.

  Therefore, Japanese Patent Laid-Open No. 9-113570 (Patent Document 1) discloses a wiring process such as a predetermined short-circuit process between eight terminals (contacts) of a voltage test plug for a four-pole and a current test plug. A continuity inspection device for inspecting whether there is no error in wiring processing is disclosed. In this apparatus, the presence or absence of conduction between the eight contact points can be confirmed by lighting the LED lamp.

  On the other hand, Japanese Utility Model Laid-Open No. 63-183558 (Patent Document 2) proposes a voltage test plug shown in FIG. 13 in which convex portions higher than the height of the base end side terminal are provided between the terminal towers. In this voltage test plug 51, a cross-shaped convex portion 54 is provided between four terminal towers 53A, 53B, 53C, 53D arranged on a base 52. Due to the cross-shaped convex portion 54 higher than the base end side terminals of the terminal towers 53A, 53B, 53C, 53D, the shorting bar 42 is connected between the terminal towers 53A and 53B, between 53B and 53D, between 53C and 53D, 53A. It becomes impossible to mount between 53B and 53C. Therefore, an accident in which the voltage test plug is erroneously recognized as a current test plug is avoided.

JP-A-9-113570 Japanese Utility Model Publication No. 63-183558

  However, since the continuity testing device in Patent Document 1 is a continuity testing device for a voltage test plug and a current test plug after performing a predetermined wiring process, the voltage test plug and the current test plug are erroneously recognized and wired. Even if the processing is performed, the error is noticed before inserting the test plug into the test terminal, and damage to the electrical equipment, power failure, etc. are avoided, but the wiring processing must be restarted from the beginning, so the wiring processing labor is wasted. It will not be avoided.

  In addition, according to the voltage test plug of Patent Document 2, the U-shaped shorting bar for preventing circuit opening is completely prevented, so that the voltage test plug and the current test plug are clearly distinguished before wiring processing is performed. However, because the volume of the cruciform protrusion higher than the base terminal is relatively large, the amount of material used for forming the protrusion is large, the manufacturing cost is high, and the large protrusion There is a problem that the unit becomes an obstacle to wiring processing such as mounting of the above-described test apparatus and mounting of a conduction angle.

  Accordingly, an object of the present invention is to provide a voltage test plug that can be clearly distinguished from a current test plug before wiring processing, and that can be easily processed at low cost. is there.

  The voltage test plug according to claim 1, which achieves the above-mentioned object, is a voltage test in which a plurality of terminal towers provided with terminals for wiring processing are provided on the surface of an insulating substrate. A plug, having a pair of legs arranged in parallel longer than between the pair of terminal towers, inserted from one terminal tower side of the pair of opposing terminal towers toward the other terminal tower; Lead the tip of the U-shaped shorting bar for the current test plug in which the inner edges of the legs are spaced apart from the diameter of the terminal of the terminal tower in the direction of non-fitting with the terminal of the other terminal tower The protrusion for preventing short circuit bar mounting is provided on the surface of the substrate.

  The protrusion in the present invention is a protrusion of the voltage test plug of Patent Document 2 when the U-shaped shorting bar for the current test plug is inserted from one terminal tower toward the other terminal tower from the tip opening side. The movement of the shorting bar is not restricted so that the connection between the terminals by the shorting bar is impossible, but the movement of the shorting bar is possible, but the shorting bar is moved from one terminal tower to the other terminal tower. This is a projection that guides the tip of the short-circuit bar so as to be displaced from the direction of fitting to the terminal of the other terminal tower as it is inserted toward the terminal. According to the present invention, if an appropriate shorting bar that fits the terminals of a pair of terminal towers is not fitted between two legs of a U-shaped shorting bar, one of the leg parts of the shorting bar is the other. Even if it reached the terminal of the terminal tower, it was made paying attention to the fact that the operator would not mistakenly recognize the voltage test plug and the current test plug.

  According to the present invention, even if the operator misidentifies the voltage test plug of the present invention as a current test plug and tries to mount the U-shaped current test plug shorting bar, the shorting bar is not properly mounted. You will notice that you misrecognized before. Further, the protrusion in the voltage test plug of the present invention is sufficient if it can be guided in a direction in which the tip of the short-circuit bar is not fitted to the terminal of the other terminal tower, so that the protrusion can be made extremely small.

  According to a second aspect of the present invention, in the voltage test plug according to the first aspect, the terminal tower is formed at each corner of a virtual rhombus whose length of a side line formed on the surface of the base is substantially equal to a length of a short diagonal line. 4 terminal towers arranged at the center, and each of the protrusions is disposed inside each triangle formed by dividing the virtual rhombus by the short diagonal line, and one terminal The tip of the short-circuit bar inserted from the tower side toward the other terminal tower is guided in a direction in which it is not fitted to the terminal of the other terminal tower.

  In this invention, the shorting bar inserted from one terminal tower toward the other terminal tower from the tip opening side is provided with the inner edge and / or the outer edge of the leg of the shorting bar arranged inside each triangle. The direction is changed in contact with the protrusion. Therefore, the tip of the short-circuit bar deviates from the direction in which it is fitted to the terminal of the other terminal tower.

  According to a third aspect of the present invention, in the voltage test plug according to the first aspect, the terminal tower is formed at each corner of a virtual rhombus whose length of a side line formed on the surface of the base is substantially equal to a length of a short diagonal line. 4 terminal towers arranged at the center, and the protrusions are arranged outside the virtual rhombus, one each corresponding to each terminal tower, and between the terminals of the corresponding terminal tower. Provided with a gap allowing insertion of one leg of the shorting bar, and guiding the tip of the shorting bar with one leg inserted into the gap in a direction not mating with the terminal of the other terminal tower It is characterized by doing.

  According to the present invention, the protrusion defines the traveling direction of the short-circuit bar in which one leg is inserted between the one terminal tower and the protrusion arranged close to the terminal tower and is inserted toward the other terminal tower. The other terminal tower is directed in a different direction. Therefore, the tip of the short-circuit bar deviates from the direction in which it is fitted to the terminal of the other terminal tower.

  According to a fourth aspect of the present invention, in the voltage plug according to the first aspect, the terminal tower is centered at each corner of a virtual rhombus whose length of a side line formed on the surface of the base is substantially equal to the length of a short diagonal line. Are four terminal towers arranged at the positions, and the protrusions are protrusions of a circular arc that surrounds the corresponding terminal tower, one corresponding to each terminal tower on the short diagonal line. Then, the projection is characterized in that the tip of the short-circuit bar inserted from one terminal tower side toward the other terminal tower is guided in a direction in which it does not fit with the terminal of the other terminal tower.

  According to the present invention, the shorting bar pushed from one terminal tower toward the other terminal tower from the tip opening side makes the inner edge and / or outer edge of the leg of the shorting bar contact the projection of the cross-section arc. And then turn around. Therefore, the tip of the short-circuit bar deviates from the direction in which the terminal of the other terminal tower is fitted.

  According to a fifth aspect of the present invention, in the voltage test plug according to any one of the first to fourth aspects, the protrusion is attached to an annular member engageable with the terminal tower, and the annular member is connected to the terminal. The protrusion is disposed on the surface of the base body by engaging with a tower. According to the present invention, the voltage test plug of the present invention can be obtained simply by engaging the annular member with a conventional voltage test plug as shown in FIG.

  According to a sixth aspect of the present invention, in the voltage test plug according to any one of the first to fifth aspects, the terminal of the terminal tower disposed so as to protrude from the surface of the base is coaxially disposed. It is comprised from the end side terminal and the front end side terminal, The height of the said protrusion is substantially equal to the height of the said base end side terminal, It is characterized by the above-mentioned. According to the present invention, it is possible to prevent the U-shaped shorting bar from being mounted between the proximal end terminals, and to perform wiring processing such as mounting a conduction angle between the proximal end terminal and the distal end terminal. It becomes easier to do.

  A seventh aspect of the present invention is the voltage test plug according to any one of the first to sixth aspects, wherein the protrusion is made of an insulating material. According to the present invention, current flow through the protrusions during wiring processing or electrical device testing is avoided, and safety is improved.

  According to the voltage test plug of the present invention, even if a voltage test plug is mistakenly recognized as a current test plug and an attempt is made to install a U-shaped shorting bar used in the current test plug, proper mounting of the shorting bar is impossible. Therefore, it can be recognized that the voltage test plug was mistakenly recognized as a current test plug before performing various wiring processes, and it is possible to avoid wasting labor, and the voltage test plug and the current test plug can be avoided. Can be completely distinguished.

  Further, since the protrusion in the voltage test plug of the present invention can be made extremely small, the manufacturing cost is low, and the wiring process to the terminal can be performed without being obstructed by the protrusion.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

(First embodiment)
FIG. 1 is a schematic side view of a voltage test plug according to a first embodiment of the present invention, and FIG. 2 is a schematic plan view of the voltage test plug.

  The voltage test plug 1 includes four pairs of conductive contacts 4 provided with an insulating plate 3 projecting from an insulating base 2 made of resin or the like sandwiched between them. Four terminal towers 5 </ b> A, 5 </ b> B, 5 </ b> C, 5 </ b> D provided corresponding to the contacts 4 are arranged to protrude. As shown in FIG. 2, the terminal towers 5A, 5B, 5C, and 5D are provided at the respective corners of the virtual rhombus 20 with the length of the side formed on the surface 2a of the base 2 being substantially equal to the length of the short diagonal line. The center of the terminal towers 5A, 5B, 5C, 5D is located, the terminal towers 5A and 5D are arranged on the long diagonal line 21, and the terminal towers 5B and 5C are arranged on the short diagonal line 22. Has been.

  The terminal towers 5A, 5B, 5C and 5D projecting from the surface of the base 2 have a conductive proximal terminal 6 close to the surface 2a of the base 2 and a conductive tip far from the surface 2a of the base 2. A pair of terminals arranged coaxially via an insulating layer composed of the side terminals 7 are provided. The proximal end side terminal 6 and the distal end side terminal 7 are respectively connected to the corresponding contacts 4 via conductive wires (not shown) embedded in the base 2.

  The base end side terminal 6 is composed of a circular support portion 6a in contact with the surface 2a of the base 2 and a cylindrical shaft portion 6b extending vertically from the support portion 6a. A male screw (not shown) is integrally formed, and an insulating base end side fastener 8 made of resin or the like is screwed to the male screw. The tip-side terminal 7 is composed of a circular support portion 7a and a cylindrical shaft portion 7b extending perpendicularly from the support portion 7a, and a male screw (not shown) is integrally formed on the tip side of the shaft portion 7b. An insulating distal end side fastener 9 made of resin or the like is screwed onto the male screw. In FIG. 2, other than the support portion 6a and the shaft portion 6b of the base end side terminal 6 are omitted for easy understanding. In addition, the circle | round | yen 27 arrange | positioned coaxially surrounding the support part 6a and the axial part 6b in FIG. 2 is the two leg parts 42a and 42b arranged in parallel of the shorting bar 42 for current test plugs shown in FIG. An imaginary circle having a diameter of the same length as the distance between the outer edges of each other is shown.

  In the voltage test plug 1 of the present embodiment, one each inside the two triangles 28 and 29 formed by dividing the virtual rhombus 20 formed on the surface 2a of the base 2 by a short diagonal line 22, respectively. Cylindrical protrusions 10A and 10B made of an insulating material such as resin are disposed.

  The protrusion 10A is disposed so that the center is located at the center of gravity of the triangle 28, and the peripheral surface 10Aa of the protrusion 10A extends from the sides 22, 23, 25 of the triangle 28 to the two legs 42a, 42b of the short-circuit bar 42. It straddles all of the straight lines 22a ′, 23 ′, 25 ′ moved in parallel to the center of gravity of the triangle 28 by ½ of the length between the outer edges of the triangles 28. That is, the distance between the peripheral surface 10Aa of the protrusion 10A and each side 22, 23, 25 of the triangle 28 is less than ½ of the length between the outer edges of the two legs 42a, 42b of the shorting bar 42. .

  Similarly, the protrusion 10B is arranged with its center located at the center of gravity of the triangle 29, and the peripheral surface 10Ba of the protrusion 10B is formed from the two legs 22, 24, 26 of the triangle 29 and the two legs of the short-circuit bar 42. It straddles all the straight lines 22a ", 24 ', 26' moved in parallel to the center of gravity of the triangle 29 by 1/2 of the length between the outer edges of 42a, 42b. The peripheral surface 10Ba of the protrusion 10B and the triangle The distance between each side 22, 24, and 26 of 29 is less than ½ of the length between the outer edges of the two legs 42 a and 42 b of the short-circuit bar 42.

  Further, the height of the protrusions 10A and 10B (the length between the surface 2a of the base 2 and the tip of the protrusion) L1 is the height of the base terminal 6 (the surface 2a of the base 2 and the tip of the base terminal 6). Is designed to be substantially equal to L2).

  FIG. 3 shows the progress of the shorting bar 42 when the U-shaped shorting bar 42 used for the current test plug is inserted from one terminal tower side of the pair of terminal towers toward the other terminal tower. It shows a state.

  The base end of the terminal tower 5D is interposed between the two legs 42a, 42b of the U-shaped shorting bar 42 so as to connect the terminal tower 5C and the terminal tower 5D arranged on the side 26 by the shorting bar 42. When the shaft portion 6b of the side terminal 6 is inserted and inserted in the direction of the terminal tower 5C, the outer edge of the leg portion 42a on the gravity center side of the triangle 29 of the short-circuit bar 42 comes into contact with the peripheral surface 10Ba of the protrusion 10B. Since the outer edge of the leg portion 42a can only advance toward the projection 5C while contacting the peripheral surface 10Ba, the distal ends of the two leg portions 42a, 42b of the short-circuit bar 42 are the base end side terminals 6 of the terminal tower 5C. The shaft portion 6b cannot be fitted (FIG. 3 (a)).

  Also, the terminal tower 5A is connected between the two leg portions 42a and 42b of the U-shaped shorting bar 42 in an attempt to connect the terminal tower 5A and the terminal tower 5C disposed on the side 25 by the shorting bar 42. When the shaft portion 6b of the end-side terminal 6 is inserted and inserted in the direction of the terminal tower 5C, the outer edge of the leg portion 42a on the gravity center side of the triangle 28 of the short-circuit bar 42 comes into contact with the peripheral surface 10Aa of the protrusion 10A. 42 can only advance toward the projection 5C while the outer edge of the leg 42a is in contact with the peripheral surface 10Aa, so that the distal ends of the two legs 42a and 42b of the short-circuit bar 42 are the base end side terminals of the terminal tower 5C. 6 cannot be fitted into the shaft portion 6b (FIG. 3B).

  Similarly, the terminal tower 5B is interposed between the two legs 42a and 42b of the U-shaped shorting bar 42 in an attempt to connect the terminal tower 5B and the terminal tower 5C disposed on the short diagonal line 22 by the shorting bar 42. When the shaft portion 6b of the base end side terminal 6 is inserted and inserted in the direction of the terminal tower 5C, the tips of the leg portions 42a and 42b of the short-circuit bar 42 come into contact with the peripheral surfaces 10Aa and 10Ba of the protrusions 10A and 10B. Since the bar 42 can only advance to the terminal tower 5C side while the outer edges or inner edges of the legs 42a and 42b are in contact with the peripheral surfaces 10Aa and 10Ba of the protrusions 10A and 10B, the two legs of the short-circuit bar 42 The distal ends of the portions 42a and 42b cannot be fitted into the shaft portion 6b of the base side terminal 6 of the terminal tower 5C (FIG. 3C).

  The operation of the shorting bar 42 when connecting the terminal tower 5A and the terminal tower 5B arranged on the side 23 by the shorting bar 42 is performed between the terminal tower 5C and the terminal tower 5D arranged on the side 26. The operation of the shorting bar 42 when trying to connect between the terminal tower 5B and the terminal tower 5D arranged on the side 24 by the shorting bar 42 is the same as that on the side 25. Since this is the same as the operation when trying to connect between the terminal tower 5A and the terminal tower 5C arranged in FIG.

  Further, when the conduction angle 41 as shown in FIG. 11 is connected to the voltage test plug 1 of the present embodiment, as shown in FIG. 1, the slit portions 41aa of the fixing portions 41a and 41b of the conduction angle 41 are provided. 41ba, the shaft portion 6b of the proximal end side terminal 6 and the shaft portion 7b of the distal end side terminal 7 of each of the terminal towers 5A, 5B, 5C, 5D are fitted, and the proximal end side fastening tool 8 and the distal end side fastening are performed. Tighten with tool 9. As a result, the fixing portions 41a and 41b of the conduction angle 41 are fixed between the support portion 6a and the proximal end side fastening tool 8 and between the support portion 7b and the distal end side fastening tool 9, and the proximal end side terminal is fixed. 6 and the tip-side terminal 7 are short-circuited via the conduction angle 41. At this time, since the height L1 of the protrusions 10A and 10B is designed to be substantially equal to the height L2 of the base end side terminal 6, the tightening operation by the base end side fastener 8 is performed by the protrusions 10A and 10B. Will not be disturbed.

  As described above, according to the voltage test plug 1 of the present embodiment, the voltage test plug 1 is mistakenly recognized as a current test plug and an attempt is made to mount the U-shaped shorting bar 42 used in the current test plug. In addition, proper mounting of the shorting bar 42, that is, mounting so that the shaft portion 6b of the base end side terminal 6 of the pair of terminal towers is fitted between the two leg portions 42a and 42b of the shorting bar 42. Since it is impossible to realize that the voltage test plug 1 is mistakenly recognized as a current test plug before performing various wiring processes, it is possible to avoid wasting labor, and the voltage test plug can be avoided. And current test plug can be completely distinguished. Further, since the protrusions in the voltage test plug 1 according to the present embodiment can be configured to be extremely small as shown in FIGS. 1 to 3, the manufacturing cost is low, and the wiring to the terminals is not obstructed by the protrusions. Processing, for example, mounting of the conduction angle 41 can be performed.

(Second embodiment)
Next, a voltage test plug according to another embodiment of the present invention will be described. Since the voltage test plug according to the present embodiment and the voltage test plug according to the first embodiment described above differ only in the protrusions, the other members are denoted by the same reference numerals as the corresponding members in the first embodiment. Omitted, only the protrusion will be described below. FIG. 4 is a schematic side view of the voltage test plug of the present embodiment, and FIG. 5 is a schematic plan view of the voltage test plug.
In the voltage test plug 1 of the present embodiment, on the surface 2a of the base 2 on the outer side of the virtual rhombus 20, one for each of the terminal towers 5A, 5B, 5C, and 5D, for preventing the shorting bar from being mounted. The protrusions 11A, 11B, 11C, and 11D are provided so as to protrude. The protrusions 11A, 11B, 11C, and 11D are insulating protrusions made of a resin having a semicircular cross section, and have flat surfaces 11Aa, 11Ba, 11Ca, and 11Da that face the corresponding terminal tower. . The distance between the shaft portions 6b of the base end side terminals 6 of the terminal towers 5A, 5B, 5C, 5D corresponding to the flat surfaces 11Aa, 11Ba, 11Ca, 11Da It is slightly longer than the distance between the inner edge and the outer edge, so that one leg portion 42a can be inserted. Further, the height L1 of the protrusions 11A, 11B, 11C, and 11D is designed to be substantially equal to the height L2 of the base end side terminal 6.

  The flat surface 11Aa of the protrusion 11A corresponding to the terminal tower 5A arranged on the long diagonal line 21 of the virtual rhombus 20 has the center of the two terminal towers 5B and 5C arranged on the short diagonal line 22 and the center of the terminal tower 5A. Are extended in the direction of a straight line a1 different from the direction in which the sides 23 and 25 of the virtual rhombus 20 are connected. Similarly, the flat surface 11Da of the protrusion 11D corresponding to the terminal tower 5D arranged on the long diagonal line 21 connects the centers of the two terminal towers 5B and 5C arranged on the short diagonal line 22 with the center of the terminal tower 5D. It extends in the direction of a straight line a4 different from the direction in which the sides 24 and 26 of the virtual rhombus 20 extend.

  The plane 11Ba of the projection 11B corresponding to the terminal tower 5B arranged on the short diagonal line 22 of the virtual rhombus 20 is different from the direction in which the short diagonal line 22 extends, and two terminal towers arranged on the long diagonal line 21 It extends in the direction of a straight line a2 different from the direction in which the sides 23 and 24 of the virtual rhombus 20 connecting the centers of 5A and 5D and the center of the terminal tower 5B extend. Similarly, the plane 11Ca of the projection 11C corresponding to the terminal tower 5C arranged on the short diagonal line 22 is different from the direction in which the short diagonal line 22 extends, and the two terminal towers 5A arranged on the long diagonal line 21 are provided. It extends in the direction of a straight line a3 different from the direction in which the sides 25 and 26 of the virtual rhombus 20 connecting the center of 5D and the center of the terminal tower 5C extend.

  FIG. 6 shows the progress of the shorting bar 42 when the U-shaped shorting bar 42 used for the current test plug is inserted from one terminal tower side of the pair of terminal towers toward the other terminal tower. It shows a state.

  In order to connect between the terminal tower 5C and the terminal tower 5D arranged on the side 26 by the short-circuit bar 42, the short-circuit bar 42 is formed in the gap between the shaft portion 6b of the base-end side terminal 6 of the terminal tower 5D and the flat surface 11Da of the protrusion 11D. Even if one leg portion 42a is inserted and inserted in the direction of the terminal tower 5C, the short-circuit bar 42 can advance only in the direction in which the outer edge of the leg portion 42a advances along the plane 11Da. The tip ends of the two leg portions 42a and 42b of 42 cannot be fitted into the shaft portion 6b of the base end side terminal 6 of the terminal tower 5C (FIG. 6A).

  Further, in order to connect between the terminal tower 5A and the terminal tower 5C arranged on the side 25 by the short-circuit bar 42, the short-circuit bar is provided in the gap between the shaft portion 6b of the base-end side terminal 6 of the terminal tower 5A and the flat surface 11Aa of the protrusion 11A. Even if one leg portion 42a of 42 is inserted and inserted in the direction of the terminal tower 5C, the shorting bar 42 can advance only in the direction in which the outer edge of the leg portion 42a advances along the plane 11Aa. The tip ends of the two leg portions 42a and 42b of the bar 42 cannot be fitted into the shaft portion 6b of the base end side terminal 6 of the terminal tower 5C (FIG. 6B).

  Similarly, in order to connect between the terminal tower 5B and the terminal tower 5C arranged on the short diagonal line 22 by the short-circuit bar 42, the gap between the shaft portion 6b of the terminal 6 on the base end side of the terminal tower 5B and the flat surface 11Ba of the protrusion 11B. Even if one leg portion 42a of the short-circuit bar 42 is inserted and inserted in the direction of the terminal tower 5C, the short-circuit bar 42 can advance only in the direction in which the outer edge of the leg portion 42a advances along the plane 11Ba. The tips of the two leg portions 42a and 42b of the short-circuit bar 42 cannot be fitted into the shaft portion 6b of the base end side terminal 6 of the terminal tower 5C (FIG. 6C).

  The operation of the shorting bar 42 when connecting the terminal tower 5A and the terminal tower 5B arranged on the side 23 by the shorting bar 42 is performed between the terminal tower 5C and the terminal tower 5D arranged on the side 26. The operation of the shorting bar 42 when trying to connect between the terminal tower 5B and the terminal tower 5D arranged on the side 24 by the shorting bar 42 is the same as that on the side 25. Since this is the same as the operation when trying to connect between the terminal tower 5A and the terminal tower 5C arranged in FIG.

  Further, when the conduction angle 41 as shown in FIG. 11 is connected to the voltage test plug 1 of the present embodiment, as shown in FIG. 4, the slit portions 41aa of the fixing portions 41a and 41b of the conduction angle 41 are provided. 42ba, the shaft portion 6b of the base end side terminal 6 and the shaft portion 7b of the tip end side terminal 7 of each terminal tower 5A, 5B, 5C, 5D are fitted to each other, and the base end side clamp 8 and the tip end side tightening are performed. Tighten with tool 9. As a result, the fixing portions 41a and 41b of the conduction angle 41 are fixed between the support portion 6a and the proximal end side fastening tool 8 and between the support portion 7b and the distal end side fastening tool 9, and the proximal end side terminal is fixed. 6 and the tip-side terminal 7 are short-circuited via the conduction angle 41. At this time, since the height L1 of the protrusions 11A, 11B, 11C, and 11D is designed to be substantially equal to the height L2 of the base end side terminal 6, the tightening operation by the base end side tightening tool 8 is performed. The projections 11A, 11B, 11C, and 11D are not obstructed.

  As described above, according to the voltage test plug 1 of the present embodiment, the short-circuit bar 42 is properly attached, that is, the pair of terminal towers facing each other between the two legs 42a and 42b of the short-circuit bar 42. Since it is impossible to mount the shaft portion 6b of the base end side terminal 6 so as to be fitted, it is noticed that the voltage test plug 1 was mistakenly recognized as a current test plug before performing various wiring processes. The waste of labor can be avoided, and the voltage test plug and the current test plug can be completely distinguished. Further, since the protrusions in the voltage test plug 1 of the present embodiment can be made extremely small as shown in FIGS. 4 to 6, the manufacturing cost is low, and the wiring to the terminals without being obstructed by the protrusions. Processing, for example, mounting of the conduction angle 41 can be performed.

(Third embodiment)
Next, a voltage test plug according to still another embodiment of the present invention will be described. Since the voltage test plug according to the present embodiment and the voltage test plug according to the first embodiment described above differ only in the protrusions, the other members are denoted by the same reference numerals as the corresponding members in the first embodiment. Omitted, only the protrusion will be described below. FIG. 7 is a schematic side view of the voltage test plug of the present embodiment, and FIG. 8 is a schematic plan view of the voltage test plug.

  In the voltage test plug 1 of the present embodiment, the two terminal towers 5B and 5C on the short diagonal line 22 of the virtual rhombus 20 formed on the surface 2a of the base 2 are provided with an annular member 12 shown in a circle in FIG. Each is attached.

  The annular member 12 is made of an insulating material having elasticity, such as rubber, and includes a ring portion 12a and a wall portion 12b having a cross-sectional arc extending in a direction perpendicular to the surface of the ring portion 12a. The annular member 12 is pushed toward the surface 2a of the base body 2 from the distal end side fastener 9 side, and the ring member 12 is engaged with the periphery of the support part 6a of the base terminal 6 so that the annular member 12 is connected to the terminal tower 5. It is attached to. The wall portion 12b of the annular member 12 attached to the terminal tower 5 is disposed so as to surround the corresponding terminal tower 5. In the present embodiment, the wall portion 12b acts as the protrusions 13A and 13B.

  The protrusions 13A and 13B are protrusions having a circular arc in cross section, and one end 13Aa of the protrusion 13A formed by the annular member 12 attached to the terminal tower 5B is connected to the side 23 of the virtual rhombus 20 and the shorting bar 42 from the side 23. The other end 13Ab of the projection 13A is located between the straight line 23 'translated to the terminal tower 5C side by a half of the length between the outer edges of the two legs 42a and 42b. Between the side 24 of the virtual rhombus 20 and a straight line 24 ′ translated from the side 24 to the terminal tower 5C side by a half of the length between the outer edges of the two legs 42a and 42b of the shorting bar 42. And the terminal tower 5D from a straight line 22b 'translated from the short diagonal 22 to the terminal tower 5D side by a half of the length between the inner edges of the two legs 42a, 42b of the shorting bar 42. It extends to the side. The distance between both end portions 13Aa and 13Ab is set slightly shorter than the distance between the inner edges of the two leg portions 42a and 42b of the short-circuit bar 42.

  One end portion 13Ba of the projection 13B formed by the annular member 12 attached to the terminal tower 5C includes the side 26 of the virtual rhombus 20 and the outer edges of the two leg portions 42a and 42b of the short-circuit bar 42 from the side 26. The other end portion 13Bb of the projection 13B is short-circuited from the side 25 and the side 25 of the virtual rhombus 20 with the straight line 26 'translated to the terminal tower 5B side by a half of the length between the sides. It is located between the straight line 25 'translated to the terminal tower 5B side by a half of the length between the outer edges of the two legs 42a and 42b of the bar 42, and the shorting bar 22 42 extends from the straight line 22b "translated to the terminal tower 5A side by a half of the length between the inner edges of the two leg parts 42a, 42b to the terminal tower 5A side. The distance between them is the two legs 42a, 42 of the shorting bar 42. It is slightly shorter set than the spacing of the inner edges of each other.

  Further, the height L1 of the protrusions 13A and 13B is designed to be substantially equal to the height L2 of the base end side terminal 6.

  FIG. 9 shows the progress of the short-circuit bar 42 when the U-shaped short-circuit bar 42 used for the current test plug is inserted from one terminal tower side of the pair of terminal towers toward the other terminal tower. It shows a state.

  The base end of the terminal tower 5D is interposed between the two legs 42a, 42b of the U-shaped shorting bar 42 so as to connect the terminal tower 5C and the terminal tower 5D arranged on the side 26 by the shorting bar 42. When the shaft portion 6b of the side terminal 6 is inserted and inserted in the direction of the terminal tower 5C, the tip of the leg portion 42a on the terminal tower 5B side of the shorting bar 42 contacts the peripheral surface 13Bc of the protrusion 13B, and the shorting bar 42 The tip of the two legs 42a and 42b of the short-circuit bar 42 is the axis of the base-side terminal 6 of the terminal tower 5C because the inner edge of the portion 42a can only advance toward the protrusion 5C while contacting the peripheral surface 13Bc. It cannot be fitted into the portion 6b (FIG. 9A).

  Also, the terminal tower 5A is connected between the two leg portions 42a and 42b of the U-shaped shorting bar 42 in an attempt to connect the terminal tower 5A and the terminal tower 5C disposed on the side 25 by the shorting bar 42. When the shaft portion 6b of the end-side terminal 6 is inserted and inserted in the direction of the terminal tower 5C, the outer edge of the leg portion 42a on the terminal tower 5B side of the short-circuit bar 42 contacts the peripheral surface 13Bc of the protrusion 13B, and the short-circuit bar 42 Can only advance toward the projection 5C while contacting the inner edge of the leg portion 42a with the peripheral surface 13Bc, so that the distal ends of the two leg portions 42a and 42b of the shorting bar 42 are at the base terminal 6 of the terminal tower 5C. Cannot be fitted to the shaft portion 6b (FIG. 9B).

  Similarly, the terminal tower 5B is interposed between the two legs 42a and 42b of the U-shaped shorting bar 42 in an attempt to connect the terminal tower 5B and the terminal tower 5C disposed on the short diagonal line 22 by the shorting bar 42. When the shaft portion 6b of the base end side terminal 6 is inserted and inserted in the direction of the terminal tower 5C, the tip of one leg portion 42a of the short-circuit bar 42 contacts the peripheral surface 13Ac of the protrusion 13A, and the short-circuit bar 42 Since the inner edges of the legs 42a and 42b can only be advanced to the terminal tower 5C while contacting the peripheral surface 13Ac of the protrusion 13A, the tips of the two legs 42a and 42b of the shorting bar 42 are connected to the terminal tower 5C. It cannot be fitted to the shaft portion 6b of the base end side terminal 6 (FIG. 9C).

  The operation of the shorting bar 42 when connecting the terminal tower 5A and the terminal tower 5B arranged on the side 23 by the shorting bar 42 is performed between the terminal tower 5C and the terminal tower 5D arranged on the side 26. The operation of the shorting bar 42 when trying to connect between the terminal tower 5B and the terminal tower 5D arranged on the side 24 by the shorting bar 42 is the same as that on the side 25. Since this is the same as the operation when trying to connect between the terminal tower 5A and the terminal tower 5C arranged in FIG.

  Further, when connecting the conduction angle 41 as shown in FIG. 11 to the voltage test plug 1 of the present embodiment, as shown in FIG. 7, the slit portions 41aa of the fixing portions 41a and 41b of the conduction angle 41 are provided. 42ba, the shaft portion 6b of the base end side terminal 6 and the shaft portion 7b of the tip end side terminal 7 of each terminal tower 5A, 5B, 5C, 5D are fitted to each other, and the base end side clamp 8 and the tip end side tightening are performed. Tighten with tool 9. As a result, the fixing portions 41a and 41b of the conduction angle 41 are fixed between the support portion 6a and the proximal end side fastening tool 8 and between the support portion 7b and the distal end side fastening tool 9, and the proximal end side terminal is fixed. 6 and the tip-side terminal 7 are short-circuited via the conduction angle 41. At this time, since the height L1 of the protrusions 13A and 13B is designed to be substantially equal to the height L2 of the base end side terminal 6, the tightening operation by the base end side fastener 8 is performed by the protrusions 13A and 13B. Will not be disturbed.

  As described above, according to the voltage test plug 1 of the present embodiment, the short-circuit bar 42 can be easily attached properly by simply attaching the annular member 12 to the conventional voltage test plug as shown in FIG. Thus, the voltage test plug 1 is obtained that cannot be mounted so that the shaft portion 6b of the base-end-side terminal 6 of the pair of terminal towers is fitted between the two leg portions 42a and 42b of the short-circuit bar 42. In addition, it is possible to avoid wasting labor by recognizing that the voltage test plug 1 was mistakenly recognized as a current test plug before performing various wiring processes. Can be completely distinguished. Further, since the protrusions in the voltage test plug 1 of the present embodiment can be made extremely small as shown in FIGS. 7 to 9, the manufacturing cost is low, and the wiring to the terminals without being obstructed by the protrusions. Processing, for example, mounting of the conduction angle 41 can be performed.

  Although three embodiments have been described above, the present invention is not limited to the above-described embodiments, and modifications can be made without departing from the spirit of the present invention. For example, in the form shown in FIGS. 1 to 3, the cylindrical protrusion may be in the form of a triangular prism, for example, and in the form shown in FIGS. 4 to 6, the protrusion does not need to have a semicircular cross section. The shape of a prism may be sufficient, and the protrusion of the circular arc shown in FIGS. 7 to 9 may be directly disposed on the base of the voltage test plug without being attached to the annular member.

It is a schematic side view of the voltage test plug of one embodiment of the present invention. FIG. 2 is a schematic plan view of the voltage test plug shown in FIG. 1. It is explanatory drawing which shows that mounting | wearing of a short circuit bar is prevented by the voltage test plug shown in FIG. It is a schematic side view of the voltage test plug of another embodiment of the present invention. FIG. 5 is a schematic plan view of the voltage test plug shown in FIG. 4. It is explanatory drawing which shows that mounting | wearing of a shorting bar is prevented by the voltage test plug shown in FIG. FIG. 6 is a schematic side view of a voltage test plug according to still another embodiment of the present invention. FIG. 8 is a schematic plan view of the voltage test plug shown in FIG. 7. It is explanatory drawing which shows that mounting | wearing of a short circuit bar is prevented by the voltage test plug shown in FIG. It is a perspective view of the conventional voltage test plug. It is explanatory drawing of a conduction angle. (A) is a top view, (b) is a side view. It is explanatory drawing of a short circuit bar. (A) is a top view, (b) is a side view. It is a top view of the voltage test plug in a prior art.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Voltage test plug 2 Board | substrate 2a Board | substrate surface 3 Insulation board 4 Contactor 5A, 5B, 5C, 5D Terminal tower 6 Base end side terminal 7 Front end side terminal 8 Base end side clamping tool 9 Front end side clamping tool 10A, 10B Protrusion 11A, 11B, 11C, 11D Protrusion 13A, 13B Protrusion 20 Virtual rhombus 22 Short diagonal line 28, 29 Triangle defined by short diagonal line 41 Conducting angle 42 Shorting bar

Claims (7)

A voltage test plug in which a plurality of terminal towers provided with terminals that are subjected to a wiring process on the surface of an insulating substrate are provided,
The pair of terminal towers have a pair of legs that are inserted from one terminal tower side toward the other terminal tower and that are parallel to each other and longer than the distance between the pair of terminal towers. A shorting bar is mounted to guide the tip of the U-shaped shorting bar for the current test plug whose inner edge is spaced apart from the diameter of the terminal of the terminal tower in the direction of non-fitting with the terminal of the other terminal tower A voltage test plug, wherein a prevention protrusion is provided on the surface of the substrate. The terminal tower is four terminal towers arranged at the center of each corner of a virtual rhombus whose length of a side line formed on the surface of the base is substantially equal to the length of a short diagonal line;
One of the protrusions is arranged inside each triangle formed by dividing the virtual rhombus by the short diagonal line, and a short-circuit bar inserted from one terminal tower side to the other terminal tower. The voltage test plug according to claim 1, wherein the tip is guided in a direction in which the tip is not fitted to a terminal of the other terminal tower. The terminal tower is four terminal towers arranged at the center of each corner of a virtual rhombus whose length of a side line formed on the surface of the base is substantially equal to the length of a short diagonal line;
The projections are arranged outside the virtual rhombus, one each corresponding to each terminal tower, with a gap allowing the insertion of one leg of the shorting bar between the terminals of the corresponding terminal tower. 2. The voltage test plug according to claim 1, wherein the voltage test plug is provided, wherein the tip of the short-circuit bar in which one leg portion is inserted in the gap is guided in a direction in which it is not fitted to a terminal of the other terminal tower. . The terminal tower is four terminal towers arranged at the center of each corner of a virtual rhombus whose length of a side line formed on the surface of the base is substantially equal to the length of a short diagonal line;
Each of the protrusions is a protrusion having a cross-sectional arc surrounding the corresponding terminal tower, one corresponding to each terminal tower on the short diagonal line, and the protrusion is from one terminal tower side to the other. The voltage test plug according to claim 1, wherein the tip of the short-circuit bar inserted toward the terminal tower is guided in a direction in which the tip of the short-circuit bar is not fitted to the terminal of the other terminal tower.   The protrusion is attached to an annular member that can be engaged with the terminal tower, and the protrusion is disposed on the surface of the base body by engaging the annular member with the terminal tower. The voltage test plug according to claim 1.   The terminal of the terminal tower that protrudes from the surface of the base is composed of a proximal terminal and a distal terminal that are coaxially disposed, and the height of the protrusion is the proximal terminal. The voltage test plug according to claim 1, wherein the voltage test plug is substantially equal to a height of the voltage test plug.   The voltage test plug according to claim 1, wherein the protrusion is made of an insulating material.

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