Electrical Equipment

Abstract

To avoid sacrificing the ease of work of a user in tightening a conductive member and a terminal block together, while suitably maintaining the contact state of both.SOLUTION: There is provided an electrical apparatus for supplying electric power to a target device. The electrical appropriately comprises: a level device which is operated for fastening a bus bar to a terminal block or releasing the fastened state; and a cover member which covers a fastening region of the terminal block where the bus bar is fastened. The lever device includes a lever unit which is constituted so as to be rotatable around the axis of rotation between a fastening position and a release position, a cam unit which is constructed so as to be displaced in accordance with the rotational motion of the lever unit, and a pressure unit with which the force of fastening the bus bar to the terminal block is adjusted in accordance with the displacement of the cam unit. The lever device and the cover member are constructed so that when the lever unit is not located at the fastening position within its movable range, a part of the lever unit comes into contact with the cover member, causing the displacement of the cover member to a closed state to be obstructed.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to an electrical device that supplies power to a target device. [Background technology]

[0002] In electrical equipment that receives a relatively large amount of power, a poor connection between a conductive member on the supply side and a terminal block on the electrical equipment side can undesirably cause abnormal heat generation at the connection point. Patent Document 1, for example, discloses a technology in which the open / closed state of a cover protecting the terminal block changes depending on the tightness of a fastening screw that secures the conductive member to the terminal block, allowing for visual confirmation of insufficient fastening torque of the fastening screw based on the open / closed state of the cover. Specifically, a restricting member is disposed between the conductive portion of the terminal block and the fastening screw, and a main portion of the restricting member is inclined upward from the fixed portion relative to the conductive portion. The correlation between the terminal block and the cover is specified so that, if the fastening torque of the fastening screw does not reach a predetermined value, the open end of the driven piece of the restricting member presses against the back surface of the cover, urging the cover in a direction that prevents the cover from closing.

[0003] Furthermore, as another technology that enables the user to recognize insufficient tightening of a fastening screw in a terminal block, for example, Patent Document 2 discloses a technology that utilizes the fact that the position of the screw head changes depending on the fastening state of the fastening screw, making it possible to visually check for insufficient fastening torque through the open / closed state of the cover of the terminal block, which changes due to interference between the protrusion on the back surface of the cover and the fastening screw. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2014-143043 [Patent Document 2] Japanese Patent Application Publication No. 9-97555 Summary of the Invention [Problem to be solved by the invention]

[0005] In conventional terminal blocks, fastening screws are widely used to prevent the connection between a conductive member such as a cable and the terminal block from coming loose. When a specified fastening torque is applied, the fastening screws are unlikely to cause poor contact between the terminal block and the conductive member. However, fastening or removing the conductive member requires the work of tightening or loosening the fastening screws. Generally, the work load of tightening screws is time-consuming, and it can be said that the user's workability is sacrificed in order to ensure contact between the conductive member and the terminal block.

[0006] The present invention has been made in consideration of such problems, and aims to provide a technology that enables the conductive member and the terminal block to be maintained in a favorable contact state without sacrificing the user's workability in fastening the two. [Means for solving the problem]

[0007] According to one aspect of the present disclosure, an electrical device supplies power to a target device, the electrical device comprising: a terminal block to which power is input from another adjacent device via a metal bus bar; a lever device that is operated to fasten the bus bar to the terminal block or release the fastened state; and a cover member that is openable and closable to expose or cover a fastening area of ​​the terminal block to which the bus bar is fastened. The lever device has a lever portion that is rotatable about a rotation axis between a fastening position and a release position, a cam portion that is configured to displace in response to the rotation of the lever portion, and a pressing portion that adjusts the fastening force of the bus bar to the terminal block in accordance with the displacement of the cam portion, and when the lever portion is not positioned at the fastening position within its movable range, the lever portion The lever device and the cover member are configured so that a portion of the lever device contacts the cover member, inhibiting displacement of the cover member to the closed state.

[0008] The electrical device may be any device configured to supply power to a target device. The target device may be any device that performs a predetermined driving operation using the supplied power, that stores the supplied power, or that supplies all or part of the supplied power to another device. In addition, the power input to the terminal block via the bus bar in the electrical device may be either DC power or AC power. The electrical device is configured such that the fastening of the bus bar used to input power to the electrical device to the terminal block is adjusted by operating a lever device. The fastening area between the bus bar and the terminal block is covered with a cover member, preventing external access to the fastening area and reducing the risk of electric shock.

[0009] Here, the lever device is configured such that, when the lever portion rotates around the rotation axis, the cam portion is displaced in response to the rotational movement, and this displacement adjusts the external force (fastening force) that the bus bar receives from the pressing portion, thereby changing the fastening state between the bus bar and the terminal block. For the lever portion to rotate, a cover member covering a fastening area on the terminal block must be opened to expose the fastening area. In other words, in order for a user to operate the lever device to fasten a bus bar to the terminal block or release a bus bar fastened to the terminal block, it is necessary to open the cover member to ensure space for the rotational movement of the lever portion.

[0010] In an electrical device configured as described above, when the lever is not positioned in the fastening position within its movable range, i.e., when the bus bar and the terminal block are not fastened together, a portion of the rotating lever comes into contact with the cover member that opens and closes, preventing the cover member from reaching the closed state, i.e., preventing the cover member from properly covering the fastening area. As a result, a user rotating the lever device can easily visually see that the cover member is not completely closed and can quickly recognize that the bus bar is not properly fastened to the terminal block. Furthermore, because the user operates the lever device by rotating the lever, the user's work is extremely simple, and the time required to fasten or unfasten the bus bar is extremely short.

[0011] In this way, by using the lever device in the electrical equipment, the user can easily fasten the bus bar to the terminal block, and the contact state between the bus bar and the terminal block is also maintained, thereby ensuring the safety of the power supply. When the lever portion reaches the fastening position, the contact between the lever portion and the cover member is released, and the cover member is preferably closed.

[0012] In the electrical device, the cover member may be configured to be rotatably attached to the main body of the electrical device so as to expose or cover the fastening area, and the lever device and the cover member may be configured so that when the lever portion is rotated from the release position to the fastening position, an end of the lever portion approaches a rotation axis of the cover member.

[0013] In the rotational movement for opening and closing the cover member, the closer to the axis of rotation the smaller the amount of movement during rotation, but by contacting the area of ​​the cover member where the amount of movement is small, the rotational movement of the cover member can be appropriately affected. In other words, during the rotational movement of the lever portion, the end of the lever portion comes into contact with the cover member near the axis of rotation of the cover member at a position immediately before the fastening position that is important for fastening the bus bar and the terminal block, thereby effectively inhibiting the cover member from being closed, and until the contact position is reached, the end of the lever portion The rotation direction of the lever portion and the rotation direction of the cover member may be the same or different.

[0014] Alternatively, in the above-described electrical device, the cover member may be configured to be rotatably attached to the main body of the electrical device so as to expose or cover the fastening area. The lever device and the cover member may be configured so that, when the lever portion is in the released position, an end of the lever portion reaches a position beyond a predetermined area corresponding to the closed state of the cover member, thereby causing contact between the lever portion and the cover member, and, when the lever portion is in the fastened position, an end of the lever portion reaches a position inside the predetermined area, thereby preventing contact between the lever portion and the cover member.

[0015] The cover member is in a closed state to eliminate the risk of electric shock caused by the fastening area between the bus bar and the terminal block being exposed to the outside. Here, the predetermined area corresponding to the closed state of the cover member is a closed space that is covered by the cover member and restricts access to the terminal block from the outside. Therefore, if the end of the lever portion reaches a position beyond the predetermined area within its range of rotation, the lever portion will interfere with the opening and closing of the cover member, preventing the cover member from being fully closed. Therefore, as described above, by allowing the end of the lever portion to reach a position beyond the predetermined area when the lever portion is in the released position and, on the other hand, allowing the end of the lever portion to reach a position within the predetermined area when the lever portion is in the fastened position, the fastened state of the bus bar and the terminal block is communicated to the open / closed state of the cover member, allowing the user to recognize the fastened state.

[0016] In the electronic device described above, a protrusion may be provided on the back side of the cover member that can come into contact with the lever portion when the lever portion is not positioned at the fastened position within its movable range. By adjusting the shape and position of the protrusion, it is possible to adjust the timing of contact between the lever portion and the cover member during the rotation of the lever portion, thereby making it possible to preferably form a state in which the cover member does not reach the closed state due to the lever portion not reaching the fastened position, and to preferably form the closed state when the lever portion reaches the fastened position.

[0017] The above-described electrical device may further include a detector that detects contact between a first portion of the lever portion and a second portion on the back surface of the cover member when the lever portion is in the fastening position, thereby detecting the closed state of the cover member. The detector allows the user to check the open / closed state of the cover member, i.e., whether the cover member has reached the closed state, by a method other than visual confirmation. This allows the user to more easily recognize whether the bus bar and the terminal block are properly fastened to each other. The second portion located on the back surface of the cover member may be provided on the protrusion or may be provided on a portion on the back surface different from the protrusion. The detector may detect the closed state of the cover member by detecting electrical current passing between the first portion and the second portion, or by other methods.

[0018] In the electrical device provided with the detector as described above, a display may be provided on the front side of the electrical device, and when the detector detects that the cover member is in the closed state, the display may indicate the closed state. By adopting such a configuration, it is possible to more accurately realize recognition by the user. [Effects of the Invention]

[0019] The connection between the conductive material and the terminal block can be achieved without sacrificing the user's workability in fastening the two. The contact state can be maintained favorably. [Brief explanation of the drawings]

[0020] [Figure 1] FIG. 1 is a diagram showing a schematic configuration of a system using a driver that supplies driving power to a motor. [Figure 2] 1 is a diagram showing a schematic configuration of a lever device for fastening a bus bar and a terminal block in a driver. FIG. [Figure 3] 10A and 10B are diagrams illustrating an operation of attaching a bus bar to a terminal block. [Figure 4] 10 is a first diagram showing the correlation between the rotational movement of the lever portion of the lever device and the opening and closing movement of the cover member. FIG. [Figure 5] 10 is a second diagram showing the correlation between the rotational movement of the lever portion of the lever device and the opening and closing movement of the cover member. FIG. [Figure 6] 10 is a third diagram showing the correlation between the rotational movement of the lever portion of the lever device and the opening and closing movement of the cover member. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0021] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings. In the drawings, identical or corresponding parts are designated by the same reference numerals, and their description will not be repeated. In this disclosure, a driver that supplies drive power to a motor is shown as one example of an electrical device, but devices equivalent to electrical devices are not limited to this driver.

[0022] First Embodiment Figure 1 is a diagram showing the schematic configuration of a power supply system that supplies drive power to a motor. The power supply system is composed of a converter 10 and two drivers 20 and 30. The converter 10 receives AC power from an AC power source 7 and outputs DC power. The output DC power is supplied to the drivers 20 and 30, which are arranged adjacent to the converter 10, via a DC bus. This DC bus is physically formed by placing a metal bus bar 50, which will be described later, between the converter 10 and driver 20 and between the drivers 20 and 30.

[0023] The drivers 20 and 30 each perform servo control of the motors 2 and 3 based on commands from a PLC (Programmable Logic Controller) (not shown). The control unit receives an operation command signal related to the operation (motion) of the motor from a higher-level device via the network and a detection signal from the encoder mounted on each motor, and calculates a command value related to servo control for driving each motor. Then, drivers 20 and 30 supply drive power for driving the corresponding motor to each motor via power lines 2a and 3a according to the calculated command value. In addition, the control unit of each servo driver is configured to also manage control other than the servo control for the corresponding motor.

[0024] The motors 2 and 3 are driven and controlled by drivers 20 and 30 to drive specific equipment. As an example of the equipment, various mechanical devices (such as the arms of industrial robots or conveying devices) can be exemplified, and the motors 2 and 3 are incorporated into the devices as actuators that drive the equipment. The motors 2 and 3 are AC servo motors. Alternatively, the motors 2 and 3 may be induction motors or DC motors. The motors 2 and 3 each have a detection disk that rotates in conjunction with the rotation of their rotors, and are equipped with an encoder that can detect the rotation state of the rotor.

[0025] 1, a DC bus is formed by a bus bar 50 so as to extend across the upper portion 12 of the converter 10 and the upper portions 22 and 32 of the drivers 20 and 30. In the DC bus, the DC power output from the converter 10 is supplied to each of the drivers 20 and 30. , 30. The bus bar 50 is made of metal, and because DC power flows through the DC bus, in order to avoid the risk of electric shock, the DC bus is not left exposed, and cover members 11, 21, 31 are provided in the converter 10 and the drivers 20, 30 so as to cover the DC bus portion. The cover members 11, 21, 31 are attached to the main body of the converter 10 and the drivers 20, 30 so as to be rotatable. Rotation shafts are provided in the main body of the converter 10 and the drivers 20, 30 so that the direction of rotation of the cover members is the vertical direction of the converter 10 and the drivers 20, 30 (the up-down direction in FIG. 1) (see the upper part (a) of FIG. 4, which will be described later, for the rotation shafts).

[0026] 2 and 3, the formation of the DC bus in this embodiment will be described. Specifically, in the converter 10 and the drivers 20 and 30, a terminal block 80 for inputting or outputting DC power is provided on the upper portion 12, 22, and 32, respectively. That is, the terminal block 80 is an input or output port for power to each electrical device, and the terminal block 80 of one electrical device (e.g., the converter 10) is connected to the terminal block 80 of an adjacent electrical device (e.g., the driver 20) by a metal bus bar 50, thereby transmitting and receiving power between the devices. The driver 20 receives DC power via the terminal block 80, and a power converter (inverter) provided therein generates drive power for the motor 2, which is then supplied to the motor 2 via a power line 2a.

[0027] In this embodiment, the lever device 40 shown in FIG. 2 fastens the terminal block 80 and the bus bar 50. The lever device 40 shown on the left side (a) of FIG. 2 is in an unlocked state in which no fastening force is applied to the bus bar 50, while the lever device 40 shown on the right side (b) of FIG. 2 is in a locked state in which a fastening force is applied to the bus bar 50. The lever device 40 has a lever portion 41 that rotates, a cam portion 43, and a pressing portion 45 that displaces in response to the movement of the cam portion 43. Note that FIG. 2 is a side view of the lever device 40, and the up-down direction in FIG. 2 coincides with the normal direction to the front surfaces of the converter 10 and drivers 20 and 30. The lever device 40 is attached to the terminal block 80 in an insulated state via a mounting shaft 47.

[0028] Lever portion 41 is configured to rotate about rotation shaft 44. The rotation direction is clockwise or counterclockwise on the plane of FIG. 2 and corresponds to the up-and-down direction on the front surface of converter 10, drivers 20, and 30. A cam portion 43 is provided on the end of lever portion 41 on the rotation shaft 44 side, i.e., the end opposite to end portion 42 on the tip side. Because cam portion 43 is integral with lever portion 41, cam portion 43 also rotates as lever portion 41 rotates. However, the outer shape of cam portion 43 is not formed rotationally symmetrically about rotation shaft 44. Therefore, when lever portion 41 rotates from an unlocked position (release position) to a locked position (fastened position), pressing portion 45, which is in contact with the outer shape of cam portion 43, is pressed downward in FIG. 2 (in the direction toward the front surface of converter 10, drivers 20, and 30). Tip portion 46 of pressing portion 45 is the portion that comes into contact with bus bar 50, and lever device 40 is configured so that tip portion 46 is pressed down by Δd when lever portion 41 rotates from the release position to the fastening position. The amount of pressing down of tip portion 46 is the source of the force that presses bus bar 50 against terminal block 80, i.e., the force that fastens bus bar 50 to terminal block 80.

[0029] Next, the bus bar 50 will be described with reference to Fig. 3. Fig. 3 is a diagram showing how the bus bar 50, which connects the terminal blocks 80 of two adjacent electrical devices (for example, the converter 10 and the driver 20), is fastened to each terminal block. Note that Fig. 3 does not show the cover members (for example, the cover members 11, 21) of each electrical device. In the upper diagram (a) of Fig. 3, the two terminal blocks 80 on the left side are terminal blocks for the output of one electrical device (for example, the converter 10), and the two terminal blocks 80 on the right side are terminal blocks for the output of the other electrical device (for example, the driver 20). ) terminal block 80. Bus bar 50 has a horizontally long rectangular shape and has two connection grooves, each consisting of groove 51 opening at a portion of its long side and groove 52 extending along the long side at the end opposite to the opening of groove 51. The width of this connection groove is wider than the diameter of mounting shaft 47 of lever device 40 installed on the terminal block 80 side.

[0030] First, as shown in FIG. 3( a), the bus bar 50 is placed in the unlocked lever device 40 so that the mounting shaft 47 of the lever device 40 fits into the groove 51 of the bus bar 50. Once the mounting shaft 47 contacts the back of the groove 51, the bus bar 50 is shifted laterally to move the mounting shaft 47 into the groove 52, as shown in FIG. 3( b). By fitting the mounting shaft of each lever device 40 into the connecting groove of the bus bar 50 in this manner, the bus bar 50 is less likely to fall off accidentally when forming the DC bus. Once the state shown in FIG. 3( b) is reached, the lever portion 41 of each lever device 40 is rotated from the release position to the fastened position, thereby fastening the bus bar 50 to the terminal block 80.

[0031] The movement of the lever device 40 for fastening the busbar 50, particularly the rotational movement of the lever portion 41, and the correlation between the cover members of the electrical devices will now be described with reference to FIG. 4. In FIG. 4, the cover members of the electrical devices are designated by reference numeral 70. Therefore, the cover member 70 refers to the cover member 11 of the converter 10 and the cover members 21 and 31 of the drivers 20 and 30. As shown in FIG. 4(a), the cover member 70 is attached so as to be rotatable about a rotation axis located on the upper portion of the body of each electrical device (e.g., upper portions 12, 22, and 32). The rotation direction of the cover member 70 about the rotation axis is the same as the rotation direction of the lever portion 41 about the rotation axis 44. The rotation axis of the cover member 70 is omitted from FIGS. 4(b) and 4(c).

[0032] Furthermore, a protrusion 71 that protrudes toward the fastening area is provided on the rear surface of the cover member 70, i.e., the surface of the cover member 70 that faces the fastening area between the bus bar 50 and the terminal block 80. The shape of the protrusion 71 may be, for example, columnar, or may be any other shape. Furthermore, the protrusion amount (height) of the protrusion 71 can be designed appropriately so that desired contact with the end 42 of the lever portion 41 occurs, as will be described later.

[0033] The state shown in FIG. 4(a) is a state in which the lever portion 41 is in the released position, which corresponds to the state shown in FIG. 3(b). At this time, when the rotation axis 44 is used as a reference, the end portion 42 of the lever portion 41 is located below the rotation axis 44, and the lever portion 41 is in a state in which it is relatively upright with respect to the terminal block 80. Therefore, the end portion 42 of the lever portion 41 comes into contact with the far end of the cover member 70 (the end portion of the cover member 70 opposite the rotation axis), and the cover member 70 is in a floating state because it cannot sufficiently cover the fastening area between the bus bar 50 and the terminal block 80. Therefore, by visually checking the floating cover member 70, the user can easily recognize that the bus bar 50 and the terminal block 80 are not fastened together.

[0034] When the lever portion 41 is rotated from the release position shown in FIG. 4(a) to the fastened position, the state shown in FIG. 4(b) is reached. At this time, the lever portion 41 rotates so that the end portion 42 of the lever portion 41 approaches the rotation axis of the cover member 70. Note that FIG. 4(b) shows the lever portion 41 not completely reaching the fastened position, but just before reaching the fastened position. In this state, the end portion 42 of the lever portion 41 is in a position where it will come into contact with the protrusion 71 provided on the back surface of the cover member 70. Therefore, the cover member 70 is unable to fully cover the fastening area between the bus bar 50 and the terminal block 80 and is in a floating state. As in FIG. 4(a), the user can recognize that the bus bar 50 and the terminal block 80 are not fastened together.

[0035] In this way, the protrusion 71 is positioned so as to come into contact with the lever portion 41 immediately before it reaches the fastening position. The shape and height (size) of the cover member 70 are designed accordingly. Just before the fastening position is reached, the bus bar 50 and the terminal block 80 appear to be fastened together, but there is a risk that the fastening state is not sufficient, and for safety reasons, the lever portion 41 needs to be turned further. Therefore, as shown in FIG. 4(b), the protrusion 71 notifies the cover member 70 of the immediately preceding state, alerting the user and enabling the bus bar 50 and the terminal block 80 to be fastened together in a more suitable manner.

[0036] When lever portion 41 is further rotated to the fastening position, the state shown in FIG. 4(c) is reached. In this state, end portion 42 of lever portion 41 is no longer in contact with protrusion 71. This eliminates the floating state of cover member 70, and a state is created in which cover member 70 sufficiently covers the fastening area between bus bar 50 and terminal block 80. As a result, the user can recognize that bus bar 50 and terminal block 80 are sufficiently fastened together. At this time, a pressing force is applied to bus bar 50 via tip portion 46 of pressing portion 45, and bus bar 50 and terminal block 80 are suitably fastened together.

[0037] In this way, by using lever device 40 to fasten bus bar 50 to terminal block 80 and suitably designing the contact state between lever portion 41 and cover member 70, the user can ensure that the two are fastened together suitably by simply rotating lever portion 41. Alternatively, lever portion 41 may rotate in a direction along the front surfaces of converter 10 and drivers 20 and 30, with the normal direction of bus bar 50 as its central axis. In this case, the rotation direction of lever portion 41 differs from the rotation direction around the rotation axis of cover member 70.

[0038] <Variation 1> A first modified example of this embodiment will be described with reference to Fig. 5. Fig. 5 shows a state corresponding to Fig. 4(b) above. This modified example employs a configuration in which, when the tip portion 71a of the protrusion 71 comes into contact with the end 42 of the lever portion 41, electricity flows between the cover member 70 and the lever device 40. As a result, when electricity flows due to the contact between the two, this may be detected and a notification may be given to the user that the rotational movement of the lever portion 41 is insufficient and the bus bar 50 and the terminal block 80 are not fastened together. As a means for this notification, various known notification means may be employed, such as lighting up a display (indicator) provided on the front side of the cover member 70 or emitting an alarm sound.

[0039] <Variation 2> A second modified example of the embodiment will be described with reference to FIG. 6. Lever device 400 in this modified example differs from lever device 40 described above in that the rotation direction of lever portion 410 is different. Specifically, lever portion 410 rotates around rotation axis 440 extending in the normal direction of bus bar 50. Cam portion 430 is provided at the end of lever portion 410 on the rotation axis 440 side, and the other end 420 is located at the tip of lever portion 410. Cam portion 430 rotates in conjunction with the rotation of lever portion 410. In the region where cam portion 430 and rotation axis 440 slide against each other, a protrusion is provided on the cam portion 430 side, and a spiral groove is formed on the side surface of rotation axis 440 along which the protrusion can slide. Therefore, when cam portion 430 rotates in accordance with the rotational movement of lever portion 410, the protrusion slides along the spiral groove, and the rotational movement of lever portion 410 is converted into a displacement of the pressing portion (not shown) along the axial direction of rotation shaft 440 (displacement along the side surface of rotation shaft 440). Then, in lever device 400, a fastening force is generated due to this displacement.

[0040] Here, in the upper diagram (a) of Figure 6, the lever part 410 is in the release position, and in the lower diagram (b), the lever part 410 is in the fastened position. Here, attention is focused on the lever device 400 on the driver 20 side (the lever device on the right side in Figure 6), which is covered by the cover member 21 of the driver 20. When the lever portion 410 of the lever device 400 is in the released position, the end portion 420 of the lever portion 410 is located in a region corresponding to the closed state in which the cover member 21 rotates around its rotation axis to cover the fastening region, i.e., beyond the region protected by the cover member 21. Specifically, the end portion 420 of the lever portion 410 protrudes into the region protected by the cover member 11 of the converter 10 adjacent to the driver 20. Therefore, if this state remains, the protruding lever portion 410 will prevent the cover members 11, 21 from being fully closed, and will not be able to fully cover the fastening region between the bus bar 50 and the terminal block 80, resulting in a floating state. Therefore, by visually checking the floating cover members 11, 21, the user can easily recognize that the bus bar 50 and the terminal block 80 are not fastened together.

[0041] 6(b), the lever portion 410 is in the fastened position. In this case, the end portion 420 of the lever portion 410 of the lever device 400 on the driver 20 side is contained within the area protected by the cover member 21. Therefore, the cover member 21 can reach the completely closed state and does not reach the floating state described above. As a result, the user can recognize that the bus bar 50 and the terminal block 80 are properly fastened to each other.

[0042] <Appendix 1> An electric device (10, 20, 30) that supplies power to a target device (2), A terminal block (80) into which power is input from another adjacent device via a metal bus bar (50); a lever device (40) that is operated to fasten the bus bar (50) to the terminal block (80) or to release the fastened state; a cover member (11, 21, 31, 70) configured to be openable and closable so as to expose or cover a fastening area of ​​the terminal block (80) to which the bus bar (50) is fastened; Equipped with The lever device (40) a lever portion (41) configured to be rotatable around a rotation shaft (44) between a fastening position and a release position; a cam portion (43) configured to be displaced in response to the rotational movement of the lever portion (41); a pressing portion (45) for adjusting a fastening force of the bus bar (50) to the terminal block (80) in accordance with a displacement of the cam portion (43); and The lever device (40) and the cover member (11, 21, 31, 70) are configured so that, when the lever portion (41) is not positioned at the fastening position within its movable range, a part of the lever portion (41) comes into contact with the cover member (11, 21, 31, 70), thereby inhibiting the cover member (11, 21, 31, 70) from moving to the closed state. Electrical equipment. [Explanation of symbols]

[0043] 2 motors 10 Converter 11, 21, 31 Cover members 20, 30 drivers 40 Lever device 41 Lever section 42 End 43 Cam section 44 Rotation axis 45 Pressing part 50 busbar 70 Cover member 71 Protrusion 80 terminal block 400 Lever Device 420 End 430 Cam section 440 Rotational Axis

Claims

1. An electrical device that supplies power to a target device, a terminal block through which power is input from other adjacent devices via a metal bus bar; a lever device that is operated to fasten the bus bar to the terminal block or to release the fastened state; a cover member configured to be openable and closable so as to expose or cover a fastening region of the terminal block to which the bus bar is fastened; Equipped with The lever device a lever portion configured to be rotatable about a rotation axis between an engagement position and a release position; a cam portion configured to be displaced in response to a rotational movement of the lever portion; a pressing portion that adjusts a fastening force of the bus bar to the terminal block in accordance with displacement of the cam portion; and The lever device and the cover member are configured so that, when the lever portion is not positioned at the fastening position within its movable range, a part of the lever portion comes into contact with the cover member, thereby inhibiting displacement of the cover member to the closed state. Electrical equipment.

2. The cover member is configured to be rotatably attached to the main body of the electrical device so as to expose or cover the fastening area, The lever device and the cover member are configured so that when the lever portion is rotated from the release position toward the fastening position, an end of the lever portion approaches a rotation axis of the cover member. The electrical device according to claim 1 .

3. The rotation direction of the lever portion and the rotation direction of the cover member are the same. The electrical device according to claim 2.

4. The cover member is configured to be rotatably attached to the main body of the electrical device so as to expose or cover the fastening area, The lever device and the cover member are configured such that, when the lever portion is in the released position, the end of the lever portion reaches a position beyond a predetermined area corresponding to the closed state of the cover member, thereby causing contact between the lever portion and the cover member, and, when the lever portion is in the fastened position, the end of the lever portion reaches a position inside the predetermined area, thereby preventing contact between the lever portion and the cover member. The electrical device according to claim 1 .

5. a protrusion that can come into contact with the lever portion when the lever portion is not positioned at the fastening position within the movable range of the lever portion is provided on the rear surface side of the cover member; The electrical device according to any one of claims 1 to 4.

6. a detection unit configured to detect a closed state of the cover member by detecting contact between a first portion of the lever portion and a second portion on a rear surface of the cover member when the lever portion is in the fastening position; The electrical device according to any one of claims 1 to 5.

7. The detection unit detects the closed state of the cover member based on the conduction of current between the first portion and the second portion.

7. The electrical device according to claim 6.

8. a display unit is provided on the front side of the electrical device, When the detection unit detects that the cover member is in a closed state, the display unit displays the closed state. The electrical device according to claim 6 or 7.

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