JP4749293B2 - Terminal block for testing - Google Patents

Description

  The present invention relates to a test terminal block for electrical connection / disconnection between two independent wires, and particularly suitable for use as a trip lock terminal block attached to a power protection control panel such as a power generation substation. It relates to a terminal block for testing.

  As a power protection control system for a power generation substation or the like, a power protection control system including a protection relay and a circuit breaker as shown in FIG. 9 is adopted. In the system shown in FIG. 9, the power supplied to the supply side electric circuit 70 is supplied from the node N <b> 1 to the load side device 86 via the load side electric circuit 71. A circuit breaker 82 whose contact is opened by an electromagnetic force generated by a current flowing in the trip coil 85 is attached to the load side electric circuit 71. Further, a transformer PT for measuring a voltage applied to the supply side circuit 70 is attached to the node N2 of the supply side circuit 70, and the voltage data of the transformer PT is attached to the power protection control panel 81. To be input. On the other hand, a current transformer CT for measuring the current flowing through the load-side circuit 71 is attached to the load-side circuit 71, and the current data is also input to the protective relay 83 attached to the power protection control panel 81. It has become.

  When the protection relay 83 finds an abnormality in the data of the transformer PT or the data of the current transformer CT, the protection relay 83 extends to the first wiring 72 and the trip coil 85 extending from the protection relay 83. A current is passed through the trip coil 85 via the wiring 73 to operate the circuit breaker 82, and the connection of the load side circuit 71 to the load side device 86 is cut off.

  A trip lock terminal block 84 as a test terminal block is attached to the power protection control panel 81 together with the protective relay 83 between the first wiring 72 and the second wiring 73. FIG. 10 is an explanatory view showing an example of the trip lock terminal block 84 incorporated in the power protection control panel 81, FIG. 10 (a) is a perspective view of the main part, and FIG. 10 (b) is a pair of terminals. It is sectional drawing which looked at the cross section cut | disconnected by the plane containing the axis | shaft of a stand. FIG. 11 shows a state in which a conventional trip lock terminal block 84 is arranged on a power protection control panel 81 such as a power generation substation.

  10 and 11, reference numeral 81 a denotes a front panel of a power protection control panel (entire drawing is omitted), and 84 is a trip lock terminal block 84 arranged in parallel with the power protection control panel 81.

  The trip lock terminal block 84 includes a pair of terminal blocks 94 and 95 and a short-circuit plug 96 straddling the terminal blocks 94 and 95, as shown in the perspective view of FIG. The terminal blocks 94 and 95 have the same structure here, and extend from the protective relay 83 located on the inner surface side of the front panel 81a as shown in the sectional view of FIG. Conductors 94a and 95a to which the wiring 73 extending to the wiring 72 and the trip coil 85 are connected, insulating mounting bases 94b and 94c and mounting bases 95b and 95c for sandwiching the front panel 81a between the front and back, and a conductor Insulating tightening screws 94a and 95a that are threadedly engaged with male screws (not shown) formed on the portions protruding from the mounting bases 94b and 95b to the outside and that move forward and backward on the conductors 94a and 95a. 94d and 95d, and insulating protection portions 94e and 95e that protect the exposed ends of the conductors 94a and 95a.

  The short-circuit plug 96 includes a plug body 96c made of a conductive material having both ends of substantially C-shaped coupling portions 96a and 96b opened in the same direction, and a knob made of an insulating material provided in the center of the plug body 96c. Part 96d.

  In such a configuration, the shorting plug 96 loosens the fastening screws 94d and 95d of the terminal blocks 94 and 95 to separate the mounting bases 94b and 95b from the fastening screws 94d and 95d, and the shorting plug 96 therebetween. After the coupling portions 96a and 96b are inserted, the fastening screws 94d and 95d are tightened again to bring the mounting bases 94b and 95b close to the fastening screws 94d and 95d, thereby sandwiching the coupling portions 96a and 96b. Thus, the terminal blocks 94 and 95 are attached.

  By this attachment, the first wiring 72 and the second wiring 73 are brought into conduction through the short-circuit plug 96 and the terminal blocks 94 and 95 to enter a power monitoring state. Further, by removing the short-circuit plug 96 from the terminal blocks 94 and 95, a trip lock state is established in which the continuity of the wirings 72 and 73 is released. The reason why the short-circuit plug 96 of the trip lock terminal block 84 is detachable is that the circuit breaker 82 is erroneously operated during the operation of checking whether or not the protective relay 83 is operating normally. This is because it is necessary to electrically disconnect the first wiring 72 and the second wiring 73 so as not to occur.

  In a power protection control panel 81 in a facility that uses a large number of circuit breakers 82 such as a power generation substation, a trip lock terminal block 84 has a circuit breaker 82 corresponding to the power protection control panel 81 as shown in FIG. Many trip lock terminal blocks 84 are attached according to the number, and each trip lock terminal block 84 is always covered with a cover 93 for the purpose of avoiding an electric shock accident and adhesion of conductive material. In many cases, the distance between adjacent trip lock terminal blocks 84 is as close as 4 cm.

  Further, as such a trip lock terminal block, there is also known a unit in which a connection portion is unitized in order to facilitate the connection state between the shorting plug and the terminal block (for example, Japanese Patent Laid-Open No. 2002-334742 (Patent) Reference 1)).

JP 2002-334742 A

  In the trip lock terminal block 84 shown in FIGS. 10 and 11, since many trip lock terminal blocks 84 are generally attached to the power protection control panel 81 in close proximity, the adjacent terminal block becomes a short circuit and becomes a short circuit. There was a problem that it was difficult to attach and remove the plug 96. Further, when the short-circuit plug 96 is removed from the terminal blocks 94 and 95 and then mounted again, the trip lock terminal blocks 84 are arranged in close proximity so that they may be attached to the wrong terminal block 84, Since the tightening screws 94d and 95d are not sufficiently tightened, the short-circuit plug 96 may be detached from the terminal blocks 94 and 95. Further, after the operation after removing the shorting plug 96 from the terminal blocks 94, 95, it is necessary to manage the shorting plug 96 so that it is not lost until the shorting plug 96 is mounted again. According to the technique disclosed in Patent Document 1, although the operation of attaching and detaching the shorting plug becomes easy, the risk of attaching the shorting plug to the wrong terminal block and the problem of losing the shorting plug are the same. Existing.

  Therefore, in consideration of the above circumstances, the present invention is a test terminal block that can be used for electrical connection / disconnection between two independent wires, for example, a trip lock terminal block as described above. This is a test terminal block that can be used suitably, and there is no risk of losing the short-circuit plug, and electrical connection / disconnection operation between the two wires can be performed quickly, easily, and reliably without erroneous operation. An object of the present invention is to provide a test terminal block.

  The object includes a first terminal block and a second terminal block that are arranged across the back surface of the substrate and are connected to two independent wires on the back surface side of the substrate. The terminal block 1 includes a first wiring connection portion to which a first wiring arranged on the back side of the substrate is connected, a conductive shaft, and a storage portion that stores the conductive shaft. However, the conductive shaft has a housing state in which the whole is housed in the housing portion, and protrudes from the housing portion on the surface side of the substrate so that only the base end portion is housed in the housing portion and is the first. A protruding state electrically connected to the wiring connection portion can be taken, and the second terminal block is connected to the second wiring arranged on the back side of the substrate. 2 wiring connection portions and electrically connected to the second wiring connection portions and on the surface side of the substrate A shaft receiving portion engageable with a tip end portion of the conductive shaft of the terminal block, and in the projecting state, the tip end portion of the conductive shaft of the first terminal block is a shaft of the second terminal block. The test terminal block is characterized in that the first wiring and the second wiring are electrically connected by engaging with the receiving portion.

  According to the test terminal block of the present invention, when the first wiring and the second wiring are to be electrically connected, only the base end portion is connected to the conductive shaft from the storage portion of the first terminal block. It is left and pulled out, and in this state, the tip of the conductive shaft is engaged with the shaft receiving portion of the second terminal block. At this time, the conductive shaft is in a “protruding state” in which it is electrically connected to the first wiring connecting portion and also electrically connected to the shaft receiving portion of the second terminal block.

  When the first wiring and the second wiring are to be electrically disconnected, the conductive shaft of the first terminal block and the shaft receiving portion of the second terminal block are disengaged, What is necessary is just to make the property shaft shift to the “storing state” in which substantially the entire shaft is housed in the housing part.

  Therefore, the electrical connection / disconnection operation between the first wiring and the second wiring can be performed very quickly and easily without any erroneous operation, and the first wiring and the second wiring can be connected. In the state of being electrically disconnected, the conductive shaft of the first terminal block is housed in the housing portion, so that the configuration necessary for electrical connection between the first wiring and the second wiring There is no need to manage the components separately to prevent their loss.

  In the test terminal block according to the present invention, the storage portion of the first terminal block is electrically connected to the first wiring connection portion and is disposed so as to extend substantially perpendicular to the substrate. A contact portion which is formed as a cylindrical body, and the conductive shaft accommodated in the conductive cylindrical body is in contact with the inner surface of the conductive cylindrical body provided at a base end thereof; And a shaft portion extending in parallel with the axis of the conductive cylinder in the storage state, and the conductive shaft in the storage state is connected to the contact portion of the conductive shaft. While maintaining contact with the inner surface of the body, the shaft portion of the conductive shaft is pulled out from the conductive cylinder in a direction substantially perpendicular to the substrate, and the shaft portion of the conductive shaft is pulled out to the second terminal block. Tilt in the direction of the By engaging with the shaft receiving portion of the terminal block, the test terminal block having a simple and compact structure can be obtained, and the first wiring can be obtained. A large space is not required for the electrical connection / disconnection operation between the second wiring and the second wiring, and a large number of test terminal blocks can be arranged close to each other. Even if they are arranged close to each other, there is no erroneous operation in the operation of electrical connection / disconnection between the first wiring and the second wiring.

  At this time, if the conductive cylinder is cylindrical and the connection portion of the conductive shaft is spherical, the connection portion of the conductive shaft and the inner surface of the conductive cylinder contact in an arc shape in the protruding state of the conductive shaft. As a result, the reliability of electrical connection between the first wiring and the second wiring is increased.

  In the test terminal block of the present invention, the conductive cylindrical body of the first terminal block is provided with a biasing means for biasing the contact portion of the conductive shaft toward the second terminal block in the protruding state. It is preferred that Even if the contact between the connecting portion of the conductive shaft and the inner surface of the conductive cylinder becomes insufficient due to wear, the contact portion of the conductive shaft securely contacts the inner surface of the conductive cylinder in the protruding state by the action of the biasing means. Therefore, the reliability of electrical connection between the first wiring and the second wiring is further increased.

  In the test terminal block of the present invention, the conductive cylinder and / or the conductive shaft is provided with a fixing means for fixing the conductive shaft to the conductive cylinder in the housed state. preferable. By this fixing means, it is possible to prevent the conductive shaft in the “storing state” from unexpectedly popping out.

  In the test terminal block of the present invention, the first terminal block and the second terminal block may be configured as separate bodies. However, the first terminal block and the second terminal block are connected and integrated. It is preferable to be configured because it becomes easy to attach and manage the entire test terminal block to the substrate. Further, since a large space is not required for the operation of electrical connection / disconnection between the first wiring and the second wiring, the first terminal block and the second terminal block are connected and integrated. The test terminal block configured as described above can be formed extremely small.

  Further, at least when the conductive shaft is in the “projecting state”, the first terminal block and the second terminal block are used for the purpose of avoiding an electric shock accident and adhesion of the conductive material to the conductive shaft. It is preferable that the part located in the surface side of is covered with a cover. Therefore, the test terminal block of the present invention further includes a cover covering the first terminal block and the second terminal block on the surface side of the substrate, and the first terminal block and / or the second terminal block substrate. It is preferable that a cover attaching means for detachably attaching the cover is provided at a position arranged on the surface side of the cover.

  The test terminal block of the present invention can be widely used for applications in which electrical connection / disconnection between the first wiring and the second wiring is repeatedly performed. One of the second wiring connection portions is connected to the wiring extending from the protective relay, and the other of the first wiring connection portion and the second wiring connection portion is connected to the wiring extending from the trip coil for the circuit breaker, and trip lock It can be suitably used as a terminal block.

  According to the test terminal block of the present invention, the operation of electrical connection / disconnection between the first wiring and the second wiring can be performed quickly and easily without failing. There is no need to separately manage components necessary for electrical connection between the first wiring and the second wiring in order to prevent loss of the structural members.

  Hereinafter, a test terminal block according to an embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 shows a state in which the test terminal block according to the present embodiment is attached to the front panel (substrate) of the power protection control panel in order to use it as a trip lock terminal block. However, FIG. 1 shows that the test terminal block of this embodiment is used to electrically separate two independent wires (a wire extending from the protective relay and a wire extending to the trip coil). FIG. 2 is a cross-sectional view of the two terminal blocks 10 and 20 corresponding to FIG. 1 and viewed from a plane passing through the axes of the two terminal blocks. In these figures, 2 is a front panel of a power protection control panel (entire figure is omitted), 1 is a plurality of test terminals arranged in parallel with the front panel 2 (only one is shown in the figure). The table is shown.

  A test terminal block according to an embodiment of the present invention includes a first terminal block 10 and a second terminal block 20 that are arranged from the rear surface to the front surface of the front panel 2, and these terminal blocks. A wiring extending from the protective relay is connected to one of the terminals 10 and 20, and a wiring extending to the trip coil is connected to the other of the terminal blocks 10 and 20, and electrical connection / disconnection between these wirings is made. Therefore, the test terminal block 1 of the present embodiment is used.

  The first terminal block 10 includes a cylindrical conductive cylinder 11 penetrating the front panel 2 and a conductive columnar first wiring integrally formed on the proximal end side of the conductive cylinder 11. The connection part 12 and the electroconductive shaft 13 accommodated in the inside of the electroconductive cylinder 11 so that a movement is possible are included as a main component.

  An insulating front side mounting base 14 and a rear side mounting base 15 are provided on the outer surface of the conductive cylinder 11 of the first terminal block 10. The front-side mounting base 14 includes an insertion portion 14a having a male screw 14aa on the outer surface to be inserted into the hole of the front panel 2, and an engagement protrusion 14b for attaching a cover 30 described later disposed on the front side of the front panel 2. The back surface side mounting base 15 has a receiving portion 15a having an internal thread 15aa on the inner surface for receiving the insertion portion 14a of the front surface side mounting base 14, and the screws (14aa, 15aa) are screwed together. Thus, the first terminal block 10 extends to the front panel 2, the conductive cylinder 11 extends substantially perpendicular to the front panel 2, the cover engaging portion 14b is disposed on the opposite side of the second terminal block 20, and the first 1 wiring connection part 12 is attached so that it may be arrange | positioned at the back surface side of the front panel 2. As shown in FIG.

  A male screw (not shown) is formed on the outer surface of the conductive first wiring connection portion 12, and after the first terminal block 10 is attached to the front panel 2, an independent wiring 18 (from the protective relay) The connection is fixed by being sandwiched between nuts 12 a that are threadedly engaged with male screws formed on the outer surface of the first wiring connection portion 12.

  The conductive shaft 13 extends in parallel to the axis of the conductive cylinder 11 from the contact portion 13a and a spherical contact portion 13a that is in contact with the inner surface of the conductive cylinder 11 provided at the base end. And a cylindrical shaft portion 13b. The diameter of the shaft portion 13b of the conductive shaft 13 is set shorter than the diameter of the connection portion 13a. An insulating gripping body 16 for an operator to grip the conductive shaft 13 is attached to the tip of the shaft portion 13b.

  The conductive cylinder 11 is set to a length that can accommodate substantially the entire conductive shaft 13, and the substantially entire conductive shaft 13 as shown in FIGS. The conductive shaft 13 is said to be in the “stored state” when it is in the stored state.

  FIG. 3 shows an enlarged perspective view of the vicinity of the tip of the conductive cylinder 11. However, for ease of understanding, the conductive shaft 13 and the gripping body 16 are omitted. On the side facing the second terminal block 20 at the tip of the conductive shaft 13, the width d1 is slightly longer than the diameter of the cylindrical shaft portion 13b of the conductive shaft 13 and shorter than the diameter of the spherical connection portion 13a. A U-shaped cylindrical groove 11a is formed. The length h1 from the open end of the cylindrical groove 11a to the deepest part is set to be approximately equal to the sum of the radius of the spherical connecting portion 13a of the conductive shaft 13 and the radius of the cylindrical shaft portion 13b.

  A concave portion 11b is provided at a position facing the cylindrical groove portion 11a on the inner surface of the conductive cylindrical body 11, and a leaf spring 11c as an urging means is welded and fixed in the concave portion 11b. Contained. The leaf spring 11 c is inclined toward the central axis of the conductive cylinder 11 as it goes toward the distal end side of the conductive cylinder 11 when no load is applied.

  The leading end of the conductive cylinder 11 is covered with an insulating cap 17 for protecting the exposed end of the conductive cylinder 11 and preventing the conductive shaft 13 from falling off the conductive cylinder 11. ing. In the center of the cap 17, a hole 17 a for allowing the shaft portion 13 b of the conductive shaft 13 to pass therethrough is provided. The diameter of the hole 17a is set slightly longer than the diameter of the cylindrical shaft portion 13b of the conductive shaft 13 and shorter than the diameter of the spherical connection portion 13a. The gripping body 16 attached to the tip of the shaft portion 13b of the conductive shaft 13 is engaged with the tip of the hole 17a. For this engagement, a female screw 17aa is formed on the distal end side of the hole 17a, and a male screw 16aa is formed on the proximal end side of the gripping body 16. These screws (17aa, 16aa) serve as a fixing means for fixing the conductive shaft 13 to the conductive cylinder 11.

  Further, a U-shaped cap groove portion 17b having a width d2 that is the same as the diameter of the hole 17a is formed on the distal end side of the cap 17. The width d1 of the cylindrical groove 11a and the width d2 of the cap groove 17b are formed to be substantially equal. The length h2 from the opening of the cap groove part 17b to the deepest part is such that when the cap 17 is attached to the tip of the conductive cylinder 11, the deepest part 11aa of the cylinder groove part 11a and the deepest part 17ba of the cap groove part 17b overlap. Set to

  When assembling the conductive cylinder 11 and the conductive shaft 13 of the first terminal block, the conductive shaft 13 is located in the conductive cylinder 11 and the base end portion 13a thereof is on the first wiring connection portion 12 side. The shaft 17 b of the conductive shaft 13 is inserted into the hole 17 a of the cap 17 and then the cap 17 is fitted into the tip of the conductive cylinder 11. At this time, it arrange | positions so that the cylinder groove part 11a and the cap groove part 17b may overlap. Finally, the gripping body 16 is fitted into the tip of the shaft portion 13b of the conductive shaft 13, and the gripping body 16 and the cap 17 are connected and fixed by screws (16aa, 17aa).

  The second terminal block 20 includes a cylindrical conductive column 21 penetrating the front panel 2 and a conductive cylindrical second formed integrally with the base end side of the conductive column 21. The wiring connection part 22 and the shaft receiving part 23 which can be engaged with the front-end | tip part of the electroconductive shaft 13 of the 1st terminal block 10 attached to the front end side of the electroconductive column 21 are included as a main component. It is out.

  An insulating front side mounting base 24 and a back side mounting base 25 are provided on the outer surface of the conductive column 21 of the second terminal block 20. The front surface side mounting base 24 has an insertion portion 24 a having a male screw 24 aa on the outer surface to be inserted into the hole of the front panel 2, and the back side mounting base 25 receives the insertion portion 24 a of the front surface side mounting base 24. A receiving portion 25a having a female screw 25aa is provided on the inner surface, and the second terminal block 20 is brought into contact with the front panel 2 and the conductive column 21 is brought into contact with the front panel 2 by screwing of the screws (24aa, 25aa). The second wiring connection portion 22 is attached so as to extend substantially vertically and to be disposed on the back surface side of the front panel 2. However, the second terminal block 20 is attached at a position where the distance between the first terminal block 10 and the second terminal block 20 is sufficiently shorter than the length of the shaft portion 13 b of the conductive shaft 13.

  A male screw (not shown) is formed on the outer surface of the conductive second wiring connection portion 22, and after the second terminal block 20 is attached to the front panel 2, an independent wiring 19 (from the protective relay) The wire extending to the trip coil or the wire extending to the trip coil is sandwiched between the nuts 22a screwed into the male screw, thereby being connected and fixed to the second wiring connecting portion 22.

  The conductive shaft receiving portion 23 is formed integrally with the conductive column 21 or is fixed in an electrically connected state by welding or the like, and can be elastically deformed. The conductive shaft receiving portion 23 is open on the opposite side of the front panel 2, and has a bearing portion 23a having a C-shaped cross section and a shaft extending in a direction away from the front panel 2 from both ends of the bearing portion 23a. Insertion parts 23b and 23c are provided. The tip of the shaft portion 13b of the conductive shaft 13 of the first terminal block 10 is engaged with the bearing portion 23a (see FIG. 4). Accordingly, the diameter of the C-shaped cross section is set slightly shorter than the diameter of the shaft portion 13b of the conductive shaft 13, so that the bearing portion 23a and the shaft portion 13b of the conductive shaft 13 can be in close contact with each other. It has become. The interval between the shaft insertion portions 23b and 23c is set to be shorter than the diameter of the bearing portion 23a, so that the shaft portion 13b of the conductive shaft 13 engaged with the bearing portion 23a does not accidentally fall off from the bearing portion 23a. It has become. An insulating covering 26 is provided so as to surround the bearing portion 23a and the shaft insertion portions 23b and 23c.

  FIG. 4 shows that the test terminal block 1 of the present embodiment is used to electrically connect two independent wires (a wire extending from the protective relay and a wire extending to the trip coil). 5 is a schematic perspective view showing a state in which the two terminal blocks 10 and 20 corresponding to FIG. 4 are cut along a plane passing through the axes of the two terminal blocks. .

  In this state, the conductive shaft 13 of the first terminal block 10 is pulled out from the conductive cylinder 11 until the base end portion 13a contacts the cap 17, and the shaft portion 13b of the conductive shaft 13 is conductive. The cylindrical body 11 is fitted into the cylindrical groove 11 a and the cap groove 17 b of the cap 17, and the tip of the shaft 13 b is fitted into the bearing 23 a of the shaft receiving portion 23 of the second terminal block 20. The leaf spring 11 c of the conductive cylinder 11 acts as a biasing means that biases the base end portion 13 a of the conductive shaft 13 in the direction of the second terminal block 20.

  As shown in FIGS. 4 and 5, the conductive shaft 13 protrudes from the conductive cylinder 11 electrically connected to the first wiring connection portion 12, and only the base end portion 13 a is the conductive cylinder 11. The conductive shaft 13 is said to be in the “projecting state” when the tip end portion of the shaft portion 13b is engaged with the shaft receiving portion 23 of the second terminal block 20.

  FIG. 6 is an explanatory diagram of a method of using the test terminal block 1 of the present embodiment.

  FIG. 6C shows a form in which the conductive shaft 13 is in a protruding state. In this embodiment, the first terminal block 10 and the second terminal block 20 are covered with a cover 30. FIG. 7 is a schematic perspective view of the cover 30. In this embodiment, the cover 30 is formed of a transparent acrylic resin or the like, and is fitted to the engagement protrusion 14b of the surface-side mounting base 14 of the first terminal block on the inner surface side of one end side of the cover 30. An engagement groove 30a is provided, and the cover 30 is slid to the front panel 2 side while the engagement protrusion 14b is inserted into the engagement groove 30a, whereby the first terminal block 10 and the second terminal block 10 are moved by the cover 30. The terminal block 20 can be covered. In this state, the wiring extending from the protective relay and the wirings 18 and 19 extending to the trip coil include the first wiring connecting portion 12, the conductive cylinder 11, the conductive shaft 13, the shaft receiving portion 23, the conductive property. It is electrically connected via the column 21 and the second wiring connection part 22, and it is possible to operate the circuit breaker through the trip coil by an electric signal from the protective relay.

  When it is desired to prevent the electrical signal from the protective relay from being transmitted to the trip coil for the operation test of the protective relay, the worker removes the cover 30 and holds the grip 16 at the tip of the conductive shaft 13. The shaft portion 13b of the conductive shaft 13 is removed from the shaft receiving portion 23, and the shaft portion 13b of the conductive shaft 13 is arranged to extend in parallel with the axis of the conductive cylinder 11 as shown in FIG. After that, the conductive shaft 13 is pushed into the conductive cylinder 11, the female screw 17aa of the cap 17 and the male screw 16aa of the gripping body 16 are screwed together, and as shown in FIG. 13 is shifted to an “accommodated state” in which substantially the whole is accommodated in the conductive cylinder 11. By this operation, the wiring extending from the protective relay and the wirings 18 and 19 extending to the trip coil can be electrically disconnected. Unexpected jumping out of the conductive shaft 13 is prevented by screwing the female screw 17aa of the cap 17 and the male screw 16aa of the gripping body 16.

  When the operation test of the protective relay is completed, the operator again grips the gripping body 16 at the tip of the conductive shaft 13, unscrews the female screw 17aa of the cap 17 and the male screw 16aa of the gripping body 16, and conducts. After the shaft 13 is pulled out and the shaft portion 13b is arranged so as to extend in parallel with the axis of the conductive cylinder 11 (FIG. 6B), the shaft portion 13b of the conductive shaft 13 is oriented in the direction of the second terminal block 20. The shaft portion 13b is fitted into the cylindrical groove portion 11a, the cap groove portion 17b, and the bearing portion 23a of the shaft receiving portion 23 of the second terminal block 20, and the conductive shaft 13 is shifted to the “projecting state”. Then, the cover 30 is attached (FIG. 6C). In the “protruding state”, the leaf spring 11c in the conductive cylinder 11 urges the base end portion 13a of the conductive shaft 13 toward the second terminal block 20, so that the wiring and trip extending from the protective relay are tripped. Via the first wiring connection portion 12, the conductive cylinder 11, the conductive shaft 13, the shaft receiving portion 23, the conductive column body 21, and the second wiring connection portion 22 with the wirings 18 and 19 extending to the coil. Electrical connection is ensured.

  The test terminal block of the present invention is not limited to the above-described embodiment, and can be changed without departing from the gist of the present invention. For example, in the above-described embodiment, the conductive cylindrical body is used as the storage portion for storing the conductive shaft. However, it is not necessary to form the entire storage portion in a cylindrical shape with a conductive material. When in the “state”, it is sufficient that the first wiring connection portion and the proximal end portion of the conductive shaft are in a conductive state. For example, an insulating cylinder may be used as the storage portion, a conductive film may be formed on the inner surface of the tip, and the conductive film may be electrically connected to the first wiring connection portion.

  Further, in the above-described embodiment, the first terminal block and the second terminal block are configured separately, but the two terminal blocks may be connected and configured integrally. FIG. 8 shows an example of an integrally configured test terminal block. In this test terminal block 1, the conductive cylinder 11 and the conductive column 21 are respectively accommodated at both ends of a connecting portion 31 disposed on the front side of the front panel 2, and the connecting portion 31 is on the front side. It also functions as a mounting base. In this embodiment, since the first terminal block 10 and the second terminal block 20 can be handled substantially integrally, when the first terminal block 10 and the second terminal block 20 are attached to the front panel 2. In addition, it is not necessary to consider the distance between the first terminal block 10 and the second terminal block 20, and the entire test terminal block 1 can be easily attached. Moreover, since the 1st terminal block 10 and the 2nd terminal block 20 are united, it is not necessary to manage each separately. Moreover, since a large space is not required for the operation of electrical connection / disconnection between the first wiring and the second wiring, the integrally formed test terminal block 1 is formed extremely small. For example, the distance between the first terminal block 10 and the second terminal block 20 can be about 2 cm (thus the length of the conductive shaft 13 is also about 2 cm).

It is a schematic perspective view which shows the state which is using in order to electrically isolate | separate two independent wirings the test terminal block which concerns on one Embodiment of this invention. It is sectional drawing which looked at the cross section which cut | disconnected the 1st terminal block and the 2nd terminal block by the plane which passes along the axis | shaft of two terminal blocks corresponding to FIG. FIG. 2 is a schematic enlarged perspective view of a tip portion of a first terminal block 10 in the test terminal block shown in FIG. 1. FIG. 2 is a schematic perspective view showing a state in which the test terminal block shown in FIG. 1 is used to electrically connect two independent wires. It is sectional drawing which looked at the cross section which cut | disconnected the 1st terminal block and the 2nd terminal block by the plane which passes along the axis | shaft of two terminal blocks corresponding to FIG. It is explanatory drawing which shows the usage method of the terminal block for a test shown in FIG. It is a schematic perspective view which shows the cover with which the test terminal block shown in FIG. 1 is equipped. It is the schematic which shows the terminal block for a test which concerns on another embodiment of this invention. It is explanatory drawing which shows an example of a power protection control system. The schematic of the conventional trip lock terminal block is shown, (a) is a perspective view of the principal part, (b) is sectional drawing which looked at the cross section cut | disconnected by the plane containing the axis | shaft of a pair of terminal block. It is explanatory drawing of the conventional trip lock terminal block.

Explanation of symbols

1. Test terminal block 2. Power protection control device front panel (board)
DESCRIPTION OF SYMBOLS 10 ... 1st terminal block 11 ... Conductive cylinder (accommodating part)
11a: cylindrical groove 11c: leaf spring (biasing means)
DESCRIPTION OF SYMBOLS 12 ... 1st wiring connection part 13 ... Conductive shaft 13a ... Base end part 13b ... Shaft part 14 ... Surface side mounting base 14b ... Engagement protrusion (cover attachment means)
15 ... back side mounting base 16 ... gripping body 16aa ... male screw (fixing means)
17 ... Cap 17aa ... Female screw (fixing means)
17b: Cap groove 18 ... First wiring 19 ... Second wiring 20 ... Second terminal block 21 ... Conductive column 22 ... Second wiring connection portion 23 ... Shaft receiving portion 24 ... Front side mounting base 25 ... Back surface Side mount 26 ... cover 30 ... cover 31 ... connecting part

Claims (5)

Including a first terminal block and a second terminal block which are disposed across the surface from the back surface of the substrate and are connected to two independent wires on the back surface side of the substrate;
The first terminal block includes a first wiring connection portion to which a first wiring arranged on the back side of the substrate is connected, a conductive shaft, and a storage portion for storing the conductive shaft. However, the conductive shaft has a storage state in which the whole is stored in the storage portion, and a base end portion that protrudes from the storage portion on the surface side of the substrate and is stored in the storage portion. It is possible to take a protruding state electrically connected to one wiring connection part,
The second terminal block has a second wiring connection portion to which a second wiring arranged on the back surface side of the substrate is connected, and is electrically connected to the second wiring connection portion and on the front surface side of the substrate. A shaft receiving portion engageable with the tip of the conductive shaft of the first terminal block,
In the protruding state, the first wiring and the second wiring are electrically connected by engaging the tip of the conductive shaft of the first terminal block with the shaft receiving portion of the second terminal block. A test terminal block characterized by being configured as described above. The storage portion of the first terminal block is formed as a conductive cylinder that is electrically connected to the first wiring connection portion and arranged to extend substantially perpendicular to the substrate,
The conductive shaft accommodated in the conductive cylindrical body is in contact with the inner surface of the conductive cylindrical body provided at a base end portion thereof, and the conductive shaft is in the retracted state from the contact portion. Including a shaft portion extending in parallel with the axis of the cylindrical tube,
The conductive shaft in the housed state, with the contact portion of the conductive shaft maintained in contact with the inner surface of the conductive cylindrical body, the shaft portion of the conductive shaft from the conductive cylindrical body to the substrate The shaft portion of the conductive shaft is tilted in the direction of the second terminal block, and the tip portion of the shaft portion of the conductive shaft is connected to the shaft receiving portion of the second terminal block. The test terminal block according to claim 1, wherein the test terminal block is configured to shift to the protruding state by being engaged.   The urging means for urging the contact portion of the conductive shaft toward the second terminal block in the projecting state is provided on the conductive cylindrical body. Terminal block for testing.   The fixing means for fixing the conductive shaft to the conductive cylinder in the storage state is provided on the conductive cylinder and / or the conductive shaft. Test terminal block as described.   The test terminal block according to any one of claims 1 to 4, wherein the first terminal block and the second terminal block are connected and integrally configured.

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