JP2014157696A - Terminal Block device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a terminal block device capable of improving working efficiency at the time of electric wire connection or the like.SOLUTION: Disclosed is a terminal block device 1 which includes: a base 2; a conductive member 4 which is held on this base with insulation and in which a terminal seat part 41 is formed on one end part side and the other end part side 42 extends to a prescribed part; and a lock member 5 which achieves electrical connection with wiring by fastening a terminal part 3a of the wiring to the terminal seat part. In the conductive member, a disconnection part 43 is provided between the terminal seat part and the other end part side, and the base is equipped with a contact member 6 which is supported so as to be moved following movement in the fastening direction of the lock member to make the disconnection part conductive.

Description

  The present invention relates to a terminal block device used for connecting, branching, or relaying external wiring in a panel such as a switchboard or a control panel.

Since many electric wires are usually connected to the terminal block device installed in the panel, various proposals for improving the efficiency of connection work have been made. For example, in order to reduce the trouble of checking the terminal connection part when wiring to the terminal block device and after wiring, the terminal connection part should be installed without increasing the volume of the terminal block body in a place where it is not hidden by the wires wired to the terminal block. There is one in which a terminal identification number can be easily identified by displaying for identification (see, for example, Patent Document 1).
In addition, as a technique for detecting looseness of a screw after fastening, when the terminal is normally tightened with a screw, the tip of the screw is screwed into contact with an isolated conductor to form an electrical closed circuit. In some cases, the signal from the alarm circuit is not output, and when the screw is loosened, the tip of the screw is separated from the conductor, and the relay contact of the alarm circuit is closed to generate an alarm signal (see, for example, Patent Document 2). ).

JP 2012-33380 A (first page, FIG. 1) Japanese Patent Laid-Open No. 1-289075 (first page, FIG. 1)

  For example, there are a large number of terminal block devices attached to a panel in plant electrical equipment, and terminal screws are frequently tightened in order to connect electric wires to the terminal block device at the time of manufacturing and testing the panel. When manually connecting to the terminal block device while the power is on, the wire terminal is in an unstable state until the terminal screw is completely tightened. Due to repeated contact and separation, there is a problem that an erroneous ON / OFF repeated signal is input to cause malfunction. Furthermore, it is necessary to check whether the terminal screws of the terminal block device are sufficiently tightened when connecting the wires or during inspection, but in the conventional terminal block device as described above, the terminal screw tightening condition is visually confirmed. It is difficult to do this, and there are problems such as wiring failure due to check omission and unexpected malfunction.

  This invention was made to eliminate the problems that occur when connecting wires to the terminal block device as described above, and it is possible to suppress the occurrence of wiring failures and unexpected malfunctions due to check leakage, and work when connecting wires, etc. It aims at providing the terminal block apparatus which can improve efficiency.

  The terminal block device according to the present invention includes a base, a conductive member that is insulated and held by the base, a terminal seat is formed on one end, and the other end extends to a predetermined portion; A terminal block device including a locking member that is electrically connected to the wiring by tightening to a seat portion, wherein the conductive member includes a disconnecting portion between the terminal seat portion and the other end side. The base is provided with a contact member that is supported by the movement of the locking member in the tightening direction so as to conduct the disconnecting portion.

  According to the terminal block device of the present invention, in the state where the fastening of the terminal portion of the wiring by the locking member is incomplete, the energization to the other end side is interrupted by the disconnecting portion, and thus malfunction due to an unexpected contact. Such problems as above can be solved, and the efficiency of wiring connection work can be improved.

It is a perspective view which shows the principal part of the terminal block apparatus by Embodiment 1 of this invention. It is sectional drawing which shows the principal part structure of the terminal block apparatus shown by FIG. It is a top view which shows the external appearance of a general terminal block apparatus. It is sectional drawing which shows the state which the connection of the terminal part of the wiring with respect to the terminal seat part of the terminal block apparatus shown by FIG. 2 was completed. It is a perspective view which shows the principal part of the terminal block apparatus by Embodiment 2 of this invention. It is sectional drawing which shows the principal part structure of the terminal block apparatus shown by FIG. It is sectional drawing which shows the state of a detection means when the connection of the terminal part of the wiring with respect to the terminal seat part of the terminal block apparatus shown by FIG. 6 is completed. It is a perspective view which shows the principal part of the terminal block apparatus by Embodiment 3 of this invention. It is sectional drawing which shows the principal part structure of the terminal block apparatus by Embodiment 4 of this invention. It is a block diagram which shows the principal part structure of the terminal block apparatus by Embodiment 5 of this invention. It is sectional drawing which shows the principal part structure of the terminal block apparatus by Embodiment 6 of this invention. It is principal part sectional drawing which shows the state by which the terminal screw shown by FIG. 11 was tightened to some extent and the switch was pushed in about half. FIG. 12 is a cross-sectional view illustrating a state where the terminal screw illustrated in FIG. 11 is completely tightened and the switch is completely pushed in. It is sectional drawing which shows the principal part structure of the switch shown by FIG.

Embodiment 1 FIG.
1 is a perspective view showing a main part of a terminal block device according to Embodiment 1 of the present invention, FIG. 2 is a cross-sectional view showing a main part structure of the terminal block device shown in FIG. 1, and FIG. 3 is a general terminal. It is a top view which shows the external appearance of a stand apparatus. In the figure, the terminal block device 1 of the first embodiment is formed on a base 2 made of an insulating material and one end of a conductive member 4 insulated and held on the base 2, and electrically connects the terminal 3 a of the wiring 3. A terminal seat 41 provided with a screw hole 41a to be connected and fixed, a terminal screw 5 as a locking member for fastening and fixing the terminal 3a of the wiring 3 to the terminal seat 41, Tightening with the washer 51 mounted between the head and the terminal portion 3a, the disconnecting portion 43 provided on the other end portion side 42 of the conductive member 4 extending from the terminal seat portion 41 to a predetermined portion, and the terminal screw 5 is completed. It is comprised using the contact member 6 which makes the disconnection part 43 conduct | electrically connected.

  A switch 60 is constituted by the disconnecting portion 43 and the contact member 6. The overall configuration of the terminal block device 1 is substantially the same as that of a general terminal block device in which terminal connection portions 1a having terminal screws 5 are arranged symmetrically as shown in FIG. No special installation method or work is required. For convenience, the conductive member 4 is electrically connected to the wiring (not shown) connected to the right terminal connection portion 1a facing the wiring (not shown) connected to the left terminal screw 5 in FIG. However, the connection destination on the other end portion side 42 of the conductive member 4 is not limited to this. Moreover, although the example in which the disconnection part 43 and the switch 60 were each provided corresponding to the terminal screw 5 on either side is demonstrated, it is not limited to this.

  The contact member 6 constituting the switch 60 is provided on the conductive member 4 which is fixed to the lower end portion of the moving element 61 and the moving element 61 which is held so as to be movable in the vertical direction of FIG. A disconnecting portion conducting member 62 for opening and closing the disconnecting portion 43, a compression spring 63 as an elastic body that constantly biases the moving element 61 in a direction away from the disconnecting portion 43 (upward direction in FIG. 2), The spring holding portion 61b is integrally formed so as to partially penetrate the central portion of the compression spring 63. The upper end 61a of the mover 61 protrudes from an insertion hole 41b provided in the vicinity of the screw hole 41a of the terminal seat 41 and is engaged with the terminal screw 5, and is driven by movement of the terminal screw 5 in the tightening direction. Is configured to do.

  The upper end portion of the compression spring 63 is locked to the moving element 61, and the lower end portion is locked to a spring locking portion (not shown) of the base 2 or the conductive member 4. Note that the compression spring 63 may be an elastic body having the same action, or may be changed to a configuration using a tension spring. The moving element 61 is disconnected when the upper end 61a protruding from the terminal seat 41 is directly or indirectly engaged with the head of the terminal screw 5 and pushed in by the tightening operation, and the tightening is completed. The part conducting member 62 is configured to have a dimensional relationship that allows the disconnecting part 43 to be conducted. When the terminal screw 5 is loosened, the part conducting member 62 is lifted by the compression spring 63 to be in the state shown in FIGS.

  Next, the operation will be described with reference to FIGS. 4 is a cross-sectional view showing a state where the connection of the terminal portion of the wiring to the terminal seat portion of the terminal block device shown in FIG. 2 is completed. As shown in FIG. 2, in a state where the terminal screw 5 is not tightened, the moving element 61 is pushed up by the compression spring 63 in a direction opposite to the tightening direction of the terminal screw 5, and the terminal seat portion 41 has an upper end portion 61 a. As shown in FIG. 1, it is in a protruding state. Since the disconnecting portion conducting member 62 is also pushed up together with the moving element 61 and is separated from the disconnecting portion 43, the energization between the terminal seat portion 41 and the other end side 42 of the conductive member 4 is interrupted. That is, energization with the terminal connecting portion 1a provided on the opposite side is cut off.

  When the terminal screw 5 is tightened, the moving member 61 is in the same direction as the tightening direction of the terminal screw 5 because the washer 51 or the terminal portion 3a of the wiring 3 is engaged with the projected upper end portion 61a. It is pushed down. When the moving element 61 moves in the direction of the disconnecting portion 43, the disconnecting portion conducting member 62 is also moved to the disconnecting portion 43 side, and when the terminal screw 5 is completely tightened, the disconnecting portion conducting member 62 is electrically connected to the disconnecting portion 43. The terminal connection 41 is in contact with the member 4 and the terminal seat 41 and the other end side 42 are electrically connected through the disconnecting portion conducting member 62, and the terminal connection on the opposite side of the terminal block device (not shown) with respect to the terminal portion of FIG. Energization to the part is performed. With the structure described above, the state of conduction and interruption can be changed according to the tightening state of the terminal screw 5.

  As described above, according to the terminal block device of the first embodiment, energization is not performed between the corresponding terminal connection portions on the left and right sides of the terminal block device 1 until the terminal screw 5 is completely tightened. When wiring is already connected to one of the terminal connection portions facing each other and electricity is flowing, when wiring is connected to the terminal connection portion on the opposite side, both of the wirings 3 not shown in the figure are erroneously shown. Even if the terminal portion 3a is brought into contact with the terminal screw 5, no power is supplied, and no malfunction occurs. Therefore, it is possible to prevent malfunctions and improve work efficiency in wire connection work.

Embodiment 2. FIG.
5 is a perspective view showing a main part of a terminal block device according to Embodiment 2 of the present invention, FIG. 6 is a cross-sectional view showing a main part structure of the terminal block device shown in FIG. 5, and FIG. 7 is shown in FIG. It is sectional drawing which shows the state of a detection means when the connection of the terminal part of the wiring with respect to the terminal seat part of the made terminal block apparatus is completed. 5 corresponds to FIG. 1 of the first embodiment, and FIG. 6 also corresponds to FIG. Throughout the drawings, the same or corresponding parts are denoted by the same reference numerals, and the description thereof is omitted. The description will focus on the differences. As shown in FIG. 5, the terminal block device 1 </ b> A according to the second embodiment is recessed in the frame wall 2 a of the base 2 that protrudes upward so as to surround three sides of the terminal seat 41. 5 is formed integrally with a display unit 71 constituted by a window-hole shaped display window for displaying the tightening state of 5 and a moving element 61 as a detector for detecting the tightening state of the terminal screw 5. The detecting means 7 for detecting the tightening state of the terminal portion 3a of the wiring 3 composed of the tightening state display member 72 configured to be visible and hidden according to the position of the moving element 61 is provided.

  The display unit 71 and the tightening state display member 72 are colored with different colors such as a combination in which the boundary portion stands out, for example, in order to easily determine the state. In the second embodiment, the moving state includes a tightening state display member 72 colored in a hatched area, which serves as a display mechanism for causing the operator to accurately recognize the tightening state of the terminal screw 5. When the terminal screw 5 is not tightened, the tightening state display member 72 is visible at the position of the display unit 71. When the terminal screw 5 is completely tightened, the tightening state display member 72 is also lowered as the moving element 61 is lowered, and is moved below the lower limit position of the display unit 71 to a position where it cannot be seen from the outside. The operator can easily determine whether 5 has been completely tightened. Other configurations are the same as those of the first embodiment.

  As described above, according to the terminal block device according to the second embodiment, the tightening state in which the terminal screw 5 is completely tightened or not completely tightened is screw tightened to the operator. Displayed by the display unit 71 for displaying the state and the detection means 7 including the tightening state display member 72, it becomes easy for the operator to confirm the tightening state of the terminal screw 5, and at the same time, the first embodiment shows The state of conduction and interruption of the conductive member 4 at the terminal seat 41 due to the tightened state of the terminal screw 5 can also be confirmed at the same time.

  In addition, this structure can provide an effect that the terminal screw 5 can be easily checked for tightening not only during work but also during testing and inspection. The structure shown in the second embodiment is realized without greatly changing the structure in the first embodiment, and these functions can be implemented with a relatively simple structure as shown in the second embodiment. Therefore, it is possible to realize a function with lower cost and resource saving than a terminal block device capable of detecting the tightening state of the terminal screw.

Embodiment 3 FIG.
FIG. 8 is a perspective view showing the main part of the terminal block device according to the third embodiment of the present invention, which corresponds to FIG. 1 of the first embodiment. As shown in FIG. 8, the terminal block device 1 </ b> B according to the third embodiment has a position where the upper end portion 61 a of the mover 61 constituting the contact member 6 protrudes from the rear side of the terminal seat portion 41 as compared with the first embodiment. The point that changed from side to side is different. Other configurations are the same as those of the first embodiment.

  As described above, the third embodiment shows an example of changing the protruding position of the upper end portion 61 a of the moving element 61. The protruding position of the upper end portion 61a of the movable element 61 is, in short, directly or indirectly engaged with the terminal screw 5 as a locking member, and the movable element shown in FIG. It is sufficient if 61 can move in the direction of the disconnecting portion 43. Therefore, the position is not limited to the positions illustrated in FIGS. 1 and 8. For example, the screw shape or the situation may be such that the terminal screw 5 is installed at the bottom of the screw hole 41 a and the terminal screw 5 detects the tightening state of the terminal screw. It can be changed as appropriate.

Embodiment 4 FIG.
FIG. 9 is a sectional view showing an outline of the terminal block device according to the fourth embodiment of the present invention, and corresponds to FIG. 2 of the first embodiment. In the figure, the terminal block device 1C according to the fourth embodiment includes a detection switch 81 in a separate circuit that is electrically independent from the conductive member 4, and a light emitting element or lamp connected to the detection switch 81 (not shown). The detection means 8 which consists of the light emission part 82 as a display part using the above is provided. The detection switch 81 includes a pair of contacts 81a and 81b and a contact 81c that short-circuits the contacts 81a and 81b. The contact 81c is insulated and held by the same moving element 61 as in the first embodiment, and the contacts 81a and 81b are connected to the light emitting portion 82 by wires 83a and 83b. When the terminal screw 5 is completely tightened, the contacts 81a and 81b It is configured to be closed and the light emitting unit 82 is lit. Since other configurations are the same as those of the first embodiment, description thereof is omitted.

  Next, the operation will be described. When the terminal screw 5 is tightened, the mover 61 is pushed in similarly to the first embodiment, the disconnection portion 43 is closed, and the terminal seat portion 41 and the other end portion 42 are energized. In addition, the contact 81a, 81b is short-circuited by the contact 81c in a state where the detection switch 81 attached to the mover 61 is interlocked with the operation of the mover 61 and the terminal screw 5 is completely tightened. 82 switches on. When the light emitting unit 82 is switched on, a lamp provided corresponding to the terminal seat 41 is turned on, and the operator can confirm the tightening state of the terminal screw of the circuit.

  In the fourth embodiment configured as described above, when a terminal screw 5 is completely tightened, an unillustrated lamp in the light emitting unit 82 is turned on so that the operator can easily know the tightening state. By using a light emitting element such as a lamp or LED, for example, the tightening state can be confirmed even in a dark place, so that it is possible to make the determination easier. Note that the lamp may be simply lit continuously, but may be blinked repeatedly. Further, not only the lamp circuit but also an alarm circuit for alarming with a buzzer or a voice may be used in combination. In that case, the configuration can be simplified by installing a lamp for each terminal and providing one alarm means such as a buzzer or sound for each terminal block device.

Embodiment 5 FIG.
FIG. 10 is a plan view showing a configuration of a terminal block device according to Embodiment 5 of the present invention. The fifth embodiment uses the configuration of the fourth embodiment shown in FIG. 9, and will be described below with reference to FIG. 9 together with FIG. In FIG. 10, the terminal block device 1D has a plurality of terminal connection portions 1a provided symmetrically in the drawing, and each terminal connection portion 1a includes a detection switch 81 similar to that of the fourth embodiment shown in FIG. A detection means 8 including a light emitting unit 82 connected to the detection switch 81 is provided. Of the pair of contacts 81a and 81b of each switch, the first common conductive member 9a electrically connected to the wiring 83a connected to one contact 81a and the wiring 83b connected to the other contact 81b are electrically connected to each other. A second common conductive member 9b connected to each other, and a tightening state for outputting a tightening state as a signal to the end portions of the first common conductive member 9a and the second common conductive member 9b. Detection terminals 9A and 9B are provided. Other configurations are the same as those in the fourth embodiment.

  In the fifth embodiment configured as described above, the output of the detection switch 81 according to the tightening state of the terminal screw 5 of the terminal connecting portion 1a is tightened by the first and second common conductive members 9a and 9b. Since it is output to the output detection terminals 9A and 9B, it is possible to detect the state of conduction and interruption of the terminal connection portion 1a. That is, any of the detection switches 81 in each terminal connection portion 1a comes into contact with the terminal screw 5 being tightened, and when the connection is established, the first and second common conductive members 9a and 9b are also conducted through the switch. Therefore, the tightening state detection detection terminals 9A and 9B, to which the first and second common conductive members 9a and 9b are directly connected, also become conductive. On the other hand, when the detection switches 81 of all the terminal connection portions 1a are cut off, the first and second common conductive members 9a and 9b are also cut off, so that the tightening state detection detection terminals 9A and 9B. Is also cut off.

  As described above, according to the fifth embodiment, the conduction state and the interruption state of the tightening state detection terminals 9A and 9B vary depending on the tightening state of the terminal screw 5 in each terminal connecting portion 1a. By using the tightening state output detection terminals 9A and 9B, for example, by connecting an external alarm circuit or monitoring device to the terminals of the tightening state output detection terminals 9A and 9B, the target terminal block device can be directly connected. Without confirmation, it is possible to confirm the tightening state of the terminal screw of the terminal block device. For example, it is expected to improve the efficiency of work in the inspection of the terminal block device.

Embodiment 6 FIG.
FIG. 11 is a cross-sectional view showing the structure of a main part of a terminal block device according to Embodiment 6 of the present invention, and FIG. 12 is a main part showing a state in which the terminal screw shown in FIG. FIG. 13 is a cross-sectional view showing a state in which the terminal screw shown in FIG. 11 is completely tightened and the switch is fully pushed in, and FIG. 14 is a cross-sectional view showing the structure of the switch shown in FIG. . In the figure, in the terminal block device 1E, a disconnecting portion conducting member 62A for opening and closing the disconnecting portion 43 is fixed to the lower end portion of the rod-like holding member 64, and the holding member 64 is in the direction of the disconnecting portion 43 with respect to the moving element 61A. It is supported to be able to advance and retreat. And the holding member 64 is always urged | biased by the direction of the disconnection part 43 by the compression spring 65 as an urging means. In place of the compression spring 65, an elastic body having the same effect can be used.

  As shown in FIG. 14, one end portion (lower end portion in the figure) of the compression spring 65 is locked to a flange portion 64a fixed to a predetermined portion of the holding member 64, and the other end portion is locked to the moving element 61A. Has been. The range of movement of the holding member 64 in the downward direction in the figure is restricted by the flange portion 64a. As shown in FIG. 11, in a state where the terminal screw 5 is loosened and the moving element 61 </ b> A is raised by the compression spring 63, the upper end 61 a of the moving element 61 </ b> A protrudes from the surface of the terminal seat 41, and the holding member The disconnecting portion conducting member 62 </ b> A attached to 64 is separated from the disconnecting portion 43. During the process of moving the terminal screw 5 in the direction of tightening the terminal portion 3a, the disconnecting portion conducting member 62A is brought into contact with the disconnecting portion 43 as shown in FIG. The spring 65 is gradually compressed, and when the tightening is completed, the compression spring 65 is most compressed and pressed against the disconnecting portion 43 with a predetermined contact pressure as shown in FIG.

  It should be noted that the display unit 71 shown in FIGS. 11 to 13 and the moving element 61A are integrally formed, and the tightening state display configured to be visible and hidden from the display unit 71 according to the position of the moving element 61A. The detecting means 7 similar to that of the second embodiment for detecting the tightening state of the terminal portion 3a of the wiring 3 made of the member 72 is not necessarily provided. The disconnection portion 43, the disconnection portion conducting member 62A, the holding member 64, the compression spring 65, and the mover 61A constitute a switch 60A. Since other configurations are the same as those of the first and second embodiments, the description thereof is omitted.

  Next, the operation will be described. In a state where the terminal screw 5 is not tightened, as shown in FIG. 11, the mover 61 </ b> A of the switch 60 </ b> A is pushed up by the compression spring 63 in the direction opposite to the tightening direction of the terminal screw 5. Accordingly, the holding member 64 supported by the moving element 61 </ b> A is similarly pushed up, and the disconnecting portion conducting member 62 </ b> A is pulled away from the disconnecting portion 43 of the conductive member 4. Therefore, in the state of FIG. 11, current is not supplied from the terminal seat portion 41 of the conductive member 4 to the other end portion side 42 of the conductive member 4.

  When the terminal screw 5 is tightened to a certain extent, as shown in FIG. 12, the terminal screw 5, the moving member 61 </ b> A by the washer 51, the holding member 64 held by the moving member 61 </ b> A, and the disconnecting portion conducting member 62 </ b> A It is pushed in the same direction as the tightening method. When the terminal screw 5 is tightened to some extent, the disconnecting portion conducting member 62A conducts the disconnecting portion 43, and energization from the terminal seat portion 41 of the conductive member 4 to the other end portion side 42 of the conductive member 4 is performed. Compared to the first embodiment, since the disconnecting portion conducting member 62A is brought closer to the disconnecting portion 43 by the holding member 64, the disconnecting portion 43 is conducted even if the terminal screw 5 is not completely tightened, that is, the right and left shown in FIG. Energization is performed between the terminal connecting portions 1a. At this time, as shown in FIG. 12, the terminal portion 3a of the wiring 3 is sandwiched between the head of the terminal screw 5 and the upper end portion of the moving element 61A via a washer 51 made of a good metal conductor, and the moving element 61A is a compression spring. Since 63 is compressed by an amount corresponding to the initial interval between the disconnection portion 43 and the disconnection portion conducting member 62A, the wiring 3 is electrically connected to the conductive member 4 via the washer 51 and the terminal screw 5. . The degree of tightening of the terminal screw 5 that is energized in the state of FIG. 12 is determined by the length of the holding member 64.

  When the terminal screw 5 is further tightened from the state of FIG. 12, the mover 61 </ b> A is pushed down in the same direction as the tightening direction of the terminal screw 5. At this time, the holding member 64 and the disconnecting portion conducting member 62A are already in contact with the disconnecting portion 43, but the holding member 64 and the disconnecting portion are provided by the compression spring 65 provided inside the moving element 61A as shown in FIG. Since the conducting member 62A can push only the moving element 61A without being pushed further, the terminal screw 5 can be completely tightened. For this reason, even in the process in which the terminal screw 5 is further tightened from the state of FIG. 12, the closed state of the disconnecting portion 43 by the disconnecting portion conducting member 62 </ b> A continues to be maintained. The other end side 42 is energized. In short, the disconnecting portion conducting member 62A is electrically connected to the disconnecting portion 43 during the stroke from the tightening start position by the terminal screw 5 to the tightening completion position.

  In the sixth embodiment configured as described above, when the terminal screw 5 is loosened from the tightening completion state, the terminal screw 5 is not loosened to the other end side 42 until the terminal screw 5 is loosened to a certain extent. It is possible to have a grace period until the energization is interrupted and the energization is maintained until then. Furthermore, the effects of the sixth embodiment can be applied to the structure for detecting the tightening state of the terminal screw shown in the second and fourth embodiments. For example, in the state where the terminal screw 5 of FIG. 12 is energized such that the terminal screw 5 is tightened to some extent, but the terminal screw 5 is insufficiently tightened, the terminal block device according to the sixth embodiment also performs the process shown in FIG. By leaving a state of insufficient tightening as in the state display unit 17, the operator can check the state. The same applies to the case where the insufficient tightening of the terminal screw according to the fourth embodiment is electrically indicated.

  Moreover, as shown in FIGS. 11-12, the detection means 7 which consists of the display part 71 and the clamping | tightening state display member 72 is attached, so that the terminal screw 5 is slightly loosened as described above. Since the shortage of tightening is displayed, it is possible to confirm the shortage of tightening even if the power supply to the other end portion 42 is maintained.

  It should be noted that within the scope of the present invention, a part or all of each embodiment can be freely combined, or each embodiment can be appropriately modified or omitted.

  1, 1A, 1B, 1C, 1D, 1E Terminal block device, 1a Terminal connection part, 2 Base, 2a Frame wall part, 3 Wiring, 3a Terminal part, 4 Conductive member, 41 Terminal seat part, 41a Screw hole, 41b Insertion hole, 42 other end side, 43 disconnection part, 5 terminal screw (locking means), 51 washer, 6 contact member, 60, 60A switch, 61, 61A moving element, 61a upper end part, 61b spring holding part, 62 , 62A disconnection portion conducting member, 63 compression spring (elastic member), 64 holding member, 64a flange portion, 65 compression spring (biasing means), 7 detection means, 71 display portion, 72 tightening state display member, 8 detection means 81 detection switch, 81a, 81b contact, 81c contact, 82 light emitting part (display part), 83a, 83b wiring, 9a first Tsushirubeden member, 9b second common conductive member, 9A, 9B state detecting terminal tightening.

Claims (7)

  A base, an insulating member held on the base, a terminal seat is formed on one end, and the other end extends to a predetermined portion; and a wiring terminal is fastened to the terminal seat A terminal block device provided with a locking member for electrical connection, wherein the conductive member is provided with a disconnection portion between the terminal seat portion and the other end side, A terminal block device comprising: a contact member that is supported by the movement of the locking member in the tightening direction to be conducted through the disconnecting portion.   The contact member is a disconnecting portion provided at a facing portion of the movable element that is engaged with the locking member and is held by the base so as to be movable in the tightening direction, and the disconnecting part of the movable element. 2. The terminal block device according to claim 1, wherein the terminal block device is provided with an elastic member that is constantly connected in a direction of retreating the moving element from the disconnection portion.   The disconnecting portion conducting member held to be movable in the direction of the disconnecting portion with respect to the moving element, and the disconnecting portion conducting member interposed between the moving element and the disconnecting portion conducting member. A biasing means that constantly biases in the direction of, and the disconnecting portion conducting member conducts the disconnecting portion in the middle of the stroke from the tightening start position by the locking member to the tightening completion position. The terminal block device according to claim 2, wherein   The detector according to claim 2 or 3, further comprising: a detector for detecting a tightening state of the locking member constituted by the movable element; and a display unit for displaying a detection result by the detector. Terminal block device.   The display unit includes a display window in which a predetermined portion of the moving element provided corresponding to the terminal seat of the base is made visible and hidden according to the movement of the moving element. Item 5. The terminal block device according to Item 4.   5. The terminal block according to claim 4, further comprising a detection switch that is electrically independent from the conductive member and is provided to operate when the fastening of the locking member by the detector is completed. apparatus.   A plurality of pairs of terminal connection portions are provided so as to face each other with respect to the base, and the terminal connection devices that face each other when the terminal portions of the wirings are tightened by the locking member are mutually connected. The first common conductive member electrically connected to one of the pair of contacts constituting each detection switch, and the second common electrically connected to the other contact, respectively. The terminal block device according to claim 6, further comprising a common conductive member, wherein the first common conductive member and the second common conductive member serve as a pair of tightening state detection terminals.

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