JP4662461B2 - Electric shock prevention device and power supply box provided with electric shock prevention device - Google Patents

Description

  The present invention relates to an electric shock prevention device that restricts opening and closing or attachment / detachment of an electric shock prevention cover of a wiring connection terminal provided in a power supply box to prevent electric shock, and a power supply box including the same.

  The power supply box and power panel that are installed on the work site to supply power to the equipment and tools required for work at the work site, or the power supply box and power supply panel for supplying power at the factory, etc. are used on a daily basis. in use. FIG. 9 is a part of a perspective view of a power supply box 1 conventionally used.

  The power supply box 1 has a circuit breaker 2 for turning on and off the power, and an electric wire connection part 3 for supplying power to devices and tools, which are housed in a housing 4. An opening / closing door for preventing rainwater from entering is often provided on the front surface of the housing 4. The circuit breaker 2 has a lever 5 for turning the power on and off on the front surface, and the power can be turned on and off by moving the lever up and down. The connecting portion 3 includes a plate-like body 6 made of an electrically insulating material and a wiring connection terminal 7 provided on the plate-like body 6. An electric shock prevention cover 8 is provided on the front surface of the wiring connection terminal 7 to prevent contact with the wiring connection terminal 7 and electric shock. The electric shock prevention cover 8 is often formed of a transparent material so that the wiring connection terminal 7 can be visually recognized, has a hinge 9 at one end, and can be rotated in the horizontal direction around the hinge 9.

  When connecting a tool or equipment, the circuit breaker 2 is turned off, the electric shock prevention cover 8 is opened, and the electrical cord of the tool or equipment is connected to the wiring connection terminal 7. After the electrical cord of the tool or device is connected to the wiring connection terminal 7, the electric shock prevention cover 8 is closed and the circuit breaker 2 is turned on, and then the tool or device is used. When removing the electrical cord of the tool or device from the wiring connection terminal 7, after turning off the circuit breaker 2, the electric shock prevention cover 8 is opened, and the electrical cord of the tool or device connected to the wiring connection terminal 7 is removed.

  As described above, the power supply box 1 is provided with the electric shock prevention cover 8 for preventing the electric shock due to contact with the wiring connection terminal 7. When connecting or removing the electrical cord of a tool or equipment to or from the wiring connection terminal 7, the circuit breaker 2 can be turned off to prevent an electric shock. In some cases, an electric shock accident may occur due to opening of the electric shock prevention cover 8 and contact with the wiring connection terminal 7.

As a technique for preventing electric shock, the device has an externally detachable member at the opening of the device housing and a circuit breaker attached in the vicinity of the member. When the member is removed from the device housing, the member is a lever of the circuit breaker. A technique is disclosed in which the circuit breaker is cut off by touching the lever and pushing down the lever (see, for example, Patent Document 1). Further, in a disconnector used in a substation facility or the like, a technology is disclosed in which a safety cover that covers an input terminal portion when a disconnector is disconnected is provided to prevent electric shock (see, for example, Patent Document 2).
JP 10-116532 A JP-A-10-144184

  The technique described in Patent Document 1 is a technique in which when a member is removed from the apparatus housing, the member contacts the lever of the circuit breaker and pushes down the lever to cut off the circuit breaker. It is not a technology that can be applied to prevent electric shock. Similarly, the technique described in Patent Document 2 is not a technique that can be applied to prevent electric shock of the power supply box and the wiring connection terminals of the power supply panel.

  As described above, no technology has been developed or disclosed to prevent an electric shock due to a power box having a circuit breaker and a wiring connection terminal, a misidentification of the power panel, or an erroneous operation. The development of a power supply box and power supply panel having a structure that cannot be performed is awaited. In addition, there is an awaited development of an electric shock prevention device that can reliably prevent an electric shock due to contact with the wiring connection terminal and can be attached to an existing power supply box or power supply panel.

An object of the present invention is to provide an electric shock prevention device for a power supply box that has a simple structure and can prevent electric shock due to erroneous operation and misidentification. Another object of the present invention is to provide an electric shock prevention device that can be mounted on an existing power supply box, and a power supply box using the same.

The present invention, breaker housing, to limit the wiring connecting terminals, and the opening and closing of the electric shock prevention cover of the power supply box with a shock prevention cover openable wire connection terminal, an electric shock preventing device for preventing electric shock ,
Is detachably mounted on the lever of the circuit breaker, a connection member that moves in conjunction with the turning on or off of the lever,
The fixed to the connecting body motion in conjunction with the turning on or off of the lever, viewed including the opening and closing limit member for limiting the opening and closing of the electric shock prevention cover,
When the electric shock prevention cover is open, if the circuit breaker is to be turned on, the open / close restrictor comes into contact with the electric shock prevention cover, and the electric circuit breaker is not turned on. Device.

In the present invention, the electric shock prevention cover opening and closing possible wiring connection terminals is rotated around the one side,
The opening limit member, said when breaker enters the is located within a range in which the electric shock prevention cover is rotated, the to prevent rotation of the electric shock prevention cover, when the previous SL breaker off, the electric shock 2. The electric shock prevention device according to claim 1, wherein the electric shock prevention cover is located outside a range in which the prevention cover rotates and does not block the rotation of the electric shock prevention cover.

In the present invention, the electric shock prevention cover opening and closing possible wiring connection terminal is a plate-like body has a hinge at one end, rotates in a horizontal direction around the hinge,
The open / close restriction body has a slight gap with the electric shock prevention cover when the circuit breaker is turned on , is in the rotation direction of the electric shock prevention cover, and is located in front of the electric shock prevention cover, the prevents the rotation of the electric shock prevention cover, when the cut is pre-Symbol breaker located below the electric shock prevention cover, claim 2, characterized in that does not prevent the rotation of the electric shock prevention cover It is an electric shock prevention apparatus as described in above.

The present invention, breaker housing, to limit the wiring connecting terminals, and the opening and closing of the electric shock prevention cover of the power supply box with a shock prevention cover openable wire connection terminals, there in electric shock prevention device for preventing electric shock And
A closing limit member fixed to the housing,
The breaker lever detachably mounted on the, seen including and a connecting member that moves in conjunction with the turning on or off of the lever,
The electric shock prevention cover is openably secured to the connecting member, the motion in conjunction with the turning on or off of the lever,
Prior Symbol opening limiter, the when breaker enters the becomes a range that the electric shock prevention cover is opened and closed, the electric shock prevention cover is opened and closed is prevented, the when breaker off of the electric shock prevention cover is opened and closed The electric shock prevention device is characterized in that the electric shock prevention cover is rotatable.

The present invention, breaker housing, to limit the wiring connection terminals, and a removable wiring connections the electric shock prevention cover detachable power box with a shock prevention cover of the terminal, there by electric shock prevention device for preventing electric shock And
Is detachably mounted on the lever of the circuit breaker, a connection member that moves in conjunction with the turning on or off of the lever,
The fixed to the connecting body motion in conjunction with the turning on or off of the lever, and detachable limiter for limiting detachment of the electric shock prevention cover,
It is an electric shock prevention device characterized by including.

In the present invention, the electric shock prevention cover of the detachable wiring connection terminal is detachably fixed in the housing with a fixing screw,
The detachable limiter, said when breaker enters of the located to a range to remove the fixing screws impossible, to prevent removal of the electric shock prevention cover, when the cut is pre-Symbol breaker the fixing screw The electric shock prevention device according to claim 5 , wherein the electric shock prevention device is located in a range in which the electric shock prevention cover can be removed and does not block the removal of the electric shock prevention cover.

The present invention includes a circuit breaker for turning on and off electricity,
A wiring connection terminal to which electrical wiring can be connected;
And prevent electric shock cover reclosable wiring connection terminals,
And electric shock prevention device as claimed in any one of 4,
The breaker, the wiring connecting terminals, and the electric shock prevention cover, and the electric shock prevention device capable of housing enclosure,
It is a power supply box characterized by including.
The present invention also includes a circuit breaker for turning on and off electricity,
A wiring connection terminal to which electrical wiring can be connected;
An electric shock prevention cover for the removable wiring connection terminal,
The electric shock prevention device according to claim 5 or 6,
A housing capable of housing the circuit breaker, the wiring connection terminal, the electric shock prevention cover, and the electric shock prevention device;
It is a power supply box characterized by including.

The present invention is an electric shock prevention device for preventing the electric shock by restricting the opening and closing of the electric shock prevention cover of the wiring connection terminal in the power supply box. The electric shock prevention device is detachably attached to the lever of the circuit breaker and interlocks with the turning on and off of the lever. It includes a moving connecting body and an opening / closing restricting body that is fixedly attached to the connecting body and moves in conjunction with turning on and off of the lever to restrict the opening and closing of the electric shock prevention cover. be able to. The electric shock prevention device of the present invention has a simple structure and can be used by being mounted on an existing power supply box . Also, if you try to turn on the circuit breaker when the electric shock prevention cover is open, the switchgear will come into contact with the electric shock prevention cover and the circuit breaker will not enter the state. Can do.

  Further, according to the present invention, the electric shock prevention cover of the wiring connection terminal that can be opened and closed rotates around one side, and the open / close restriction body is positioned within a range in which the electric shock prevention cover rotates when the circuit breaker is turned on. However, when the circuit breaker is turned off and the circuit breaker is turned off, it is located outside the range of rotation and does not block the rotation of the cover. The electric shock prevention cover cannot be opened, and electric shock due to contact with the wiring connection terminals can be reliably prevented.

  Further, according to the present invention, the electric shock prevention cover of the wiring connection terminal that can be opened and closed is a plate-like body, has a hinge at one end, rotates in the horizontal direction around the hinge, and the opening and closing restriction body is cut off. When the device is turned on, it has a slight gap with the electric shock prevention cover, is in the direction of rotation of the electric shock prevention cover and is located in front of the electric shock prevention cover. Since it is located below the electric shock prevention cover, it can be used by being mounted on a power supply box having an electric shock prevention cover that can be rotated in the horizontal direction. Moreover, the electric shock by contact can be prevented reliably.

  The present invention also provides an electric shock prevention device for preventing the electric shock by restricting the opening and closing of the electric shock prevention cover of the wiring connection terminal in the power supply box, and is attached to the open / close restrictor fixed in the housing and the lever of the circuit breaker. The electric shock prevention cover is fixed to the connecting body so as to be openable and closable, moves in conjunction with the turning on and off of the lever, and the circuit breaker is turned on. Sometimes, the open / close restriction body is within the range where the electric shock prevention cover opens and closes, the electric shock prevention cover is blocked from opening and closing, and when the circuit breaker is off, the open / close restriction body is out of the range where the electric shock prevention cover opens and closes. Since the cover is rotatable, the structure is simple, and the cover can be used by being mounted on an existing power supply box. Furthermore, electric shock due to contact can be reliably prevented.

  In addition, the present invention is an electric shock prevention device for preventing electric shock by restricting the attachment and detachment of the electric shock prevention cover of the wiring connection terminal in the power supply box. And a connecting / removing restricting body that is fixed to the connecting body and moves in conjunction with turning on / off of the lever and restricts attachment / detachment of the electric shock prevention cover. Can be used in a box. Furthermore, electric shock due to contact can be reliably prevented.

  Further, according to the present invention, the electric shock prevention cover of the detachable wiring connection terminal is detachably fixed in the housing with the fixing screw, and the detachment restricting body makes it impossible to remove the fixing screw when the breaker enters. Located in the range, prevents the removal of the electric shock prevention cover, and when the circuit breaker is cut off, it is located in the range where the fixing screw can be removed and does not block the removal of the electric shock prevention cover. can do. By this invention, it can be used also for a power supply box provided with the electric shock prevention cover fixed with a fixing screw.

According to the present invention, the power supply box, the breaker turns on and off the electricity and connectable wiring connecting terminals electrical wiring, and electric shock prevention cover reclosable wiring connection terminals, of claims 1 to 4 Since it is configured to include the electric shock prevention device according to any one of the above, a circuit breaker, a wiring connection terminal, an electric shock prevention cover, and a housing that can accommodate the electric shock prevention device, it is possible to reliably prevent electric shock due to contact. Can do.
Moreover, according to this invention, this power supply box is the circuit breaker which turns on and off electricity, the wiring connection terminal which can connect an electrical wiring, the electric shock prevention cover of a detachable wiring connection terminal, and Claim 5 or 6 The electric shock prevention device, the circuit breaker, the wiring connection terminal, the electric shock prevention cover, and the housing that can accommodate the electric shock prevention device are included, so that electric shock due to contact can be reliably prevented.

  FIG. 1 is a perspective view of a power supply box 20 equipped with an electric shock prevention device 10 as a first embodiment of the present invention. FIG. 2 is a partial cross-sectional view showing a part of the cross-sectional view taken along the cutting line II-II in FIG. The power supply box 20 is for supplying electricity to an electric device, an electric tool, etc., and a circuit breaker 22 for turning on and off the power source and an electric cord of the device or tool are connected to the device or tool. A wiring connection portion 23 for supplying power is provided.

  The circuit breaker 22 has a lever 24 for turning on and off the power supply on the front surface, and is fixed to the housing 21 via a circuit breaker fixing base 25. The power can be turned on and off by moving the lever 24 up and down. The wiring connection portion 23 includes a plate-like body 26 made of an electrically insulating material and a wiring connection terminal 27 provided on the plate-like body 26. The wiring connection terminal 27 has a screw structure and is fixed to the plate-like body 26 with nuts 28a and 28b. The wiring connection terminal 27 is electrically connected to the circuit breaker 22 by an electric wire 29.

  The connection between the electric wire 29 and the wiring connection terminal 27 is performed by holding the connection member 30 fixed to the electric wire 29 with a nut 28a. Further, the wiring connection terminal 27 is detachably connected to an electric cord 32 (32a, 32b, 32c) such as an electric tool introduced from the lower opening 31 of the housing 21 by a nut 33. The electrical cord 32 and the wiring connection terminal 27 are connected by sandwiching a connection member 34 fixed to the electrical cord 32 with a nut 33.

  On the front surface of the wiring connection portion 23, an electric shock prevention cover 40 is provided for preventing an electric shock by contacting the wiring connection terminal 27. The electric shock prevention cover 40 is often formed of an electrically insulating transparent resin so that the connection state of the wiring connection terminals 27 can be visually recognized. The electric shock prevention cover 40 has a rectangular shape and includes a hinge 41 on one side. One end of the hinge 41 is fixed to a hinge fixing base 42 fixed to the casing 21 of the power supply box 20, and the electric shock prevention cover 40 can rotate in the horizontal direction around the hinge 41. The electric shock prevention cover 40 can rotate in the direction A in FIG. 1, but cannot rotate in the opposite direction.

  The electric shock prevention device 10 is attached to the lever 24 of the circuit breaker 22. The electric shock prevention device 10 includes a connecting rod mounting plate 11 that can be attached to and detached from the lever 24, a connecting rod 12 (12a, 12b) that is fixed to the connecting rod mounting plate 11, and a cross-sectional shape that is fixed to the connecting rod 12 is concave. And a concave body 13. In the present embodiment, the connecting rod mounting plate 11 and the connecting rod 12 are constituted by separate members, but it goes without saying that these can be formed integrally. In the present embodiment, the connecting rod mounting plate 11 and the connecting rod 12 correspond to a connecting body. Further, as will be described later, in this embodiment, the concave body 13 fixed to the connecting rod corresponds to the opening / closing restriction body.

  The material of the connecting rod mounting plate 11 and the connecting rod 12 that are detachably attached to the lever 24 of the circuit breaker 22 is not particularly limited, but the weight of the connecting body and the opening / closing limiter 13 is received by the lever 24. Therefore, it is desirable that the material is lightweight. Further, for safety reasons, it is more desirable to use an electrically insulating material. The shape of the coupling body may be a shape that can support the opening / closing restriction body 13 without deformation in consideration of the weight.

  The concave body 13 having a concave cross-sectional shape is configured such that the plate-like portion 14 on the front side among the plate-like portions forming the concave body 13 rotates when the concave body 13 is lifted as will be described later. And is disposed on the front side of the electric shock prevention cover 40 so as to overlap in plan view.

Next, an electric shock prevention mechanism of the electric shock prevention device 10 will be described. When the lever 24 of the circuit breaker 22 is lowered to turn off the power, the coupling bodies 11 and 12 attached to the lever 24 are also lowered in conjunction with the lever. The concave body 13 fixed to the coupling bodies 11 and 12 is also lowered integrally with the coupling bodies 11 and 12. When the lever 24 of the circuit breaker 22 is lowered, the plate-like portion 14 on the front side of the concave body 13 is disposed.
Is at a position lower than the lower end 43 of the electric shock prevention cover 40. Therefore, when the circuit breaker 22 is in the cut-off state, the electric shock prevention cover 40 can be opened (turned). At this time, since no electricity is conducted to the wiring connection terminal 27, no electric shock is caused even if it contacts the wiring connection terminal 27.

  On the other hand, when the lever 24 of the circuit breaker 22 is raised and the power is turned on, the coupling bodies 11 and 12 attached to the lever 24 are also raised in conjunction with the lever 24. The concave body 13 fixed to the coupling bodies 11 and 12 is also lifted together with the coupling bodies 11 and 12. The plate-like portion 14 on the front side among the plate-like portions that form the concave body 13 is a direction in which the electric shock prevention cover 40 rotates when the concave body 13 is lifted, and is on the front side of the electric shock prevention cover 40. These are arranged so as to overlap in plan view. That is, when the lever 24 of the circuit breaker 22 is raised, the upper end 15 of the plate-like portion 14 on the front side of the concave body 13 is higher than the lower end 43 of the electric shock prevention cover 40.

  As a result, when the circuit breaker 22 is in the on state, the electric shock prevention cover 40 cannot be opened (turned). When the circuit breaker 22 is in the on state, electricity is conducted to the wiring connection terminal 27, but since the electric shock prevention cover 40 cannot be opened, there is no electric shock due to contact with the wiring connection terminal 27.

  As described above, the concave body 13 functions as an opening / closing restricting body that restricts the opening / closing of the electric shock prevention cover 40 in conjunction with the coupling bodies 11 and 12. When the width of the lower plate-like portion 16 of the concave body 13 having a concave cross-sectional shape is large and the concave body 13 is lifted, the plate-like portion 14 on the front side of the concave body 13, the electric shock prevention cover front portion 44, If the distance between the two is large, even if it is impossible to completely open the electric shock prevention cover 40, it is possible to open it somewhat, so that the plate-like shape on the front side of the concave body 13 when the concave body 13 is lifted up. It is desirable that the distance δ between the portion 14 and the electric shock prevention cover front surface portion 44 is small. This distance is a distance that cannot contact the distribution connection terminal 27 even if the electric shock prevention cover 40 is slightly opened.

  As described above, the electric shock prevention device 10 of the present invention has a very simple structure and can reliably prevent an electric shock from coming into contact with the wiring connection terminal 27. Moreover, since the electric shock prevention apparatus 10 of this invention has a structure which can be attached or detached to the lever 24 of the circuit breaker 22, it can be used also for the existing power supply box. In the first embodiment shown in FIG. 1 and FIG. 2, an example in which the electric shock prevention cover 40 rotates in the horizontal direction is shown. However, a hinge is provided at the upper end of the electric shock prevention cover, and the electric shock prevention cover 40 is vertically Needless to say, the present invention can also be applied to a type that rotates in the direction.

  FIG. 3 is a perspective view of the power supply box 20 equipped with the electric shock prevention device 10 as the first embodiment of the present invention, and shows a state where the electric shock prevention cover 40 is open. In this embodiment, portions corresponding to those in FIG. 1 or FIG. 2 are denoted by the same reference numerals, and redundant description is omitted. As shown in FIG. 3, in the power supply box 20 provided with the electric shock prevention device 10, when the lever 24 of the circuit breaker 22 is lifted to turn on the power when the electric shock prevention cover 40 is open, it opens and closes in conjunction with the lever 24. The restricting body 13 is also lifted. As a result, the open / close restriction body 13 is prevented from coming into contact with the electric shock prevention cover 40 and the lever 24 is prevented from being lifted continuously, so that the power cannot be turned on.

  Thus, in the power supply box 20 equipped with the electric shock prevention device 10, when the electric shock prevention cover 40 is open, the circuit breaker 22 cannot be turned on. There is no electric shock when touched. Needless to say, even when the opening / closing restriction body 13 comes into contact with the electric shock prevention cover 40, the opening / closing restriction body 13 and the coupling bodies 11 and 12 need to have a strength that does not deform or break.

  FIG. 4 is a partial cross-sectional view of the power supply box 20 equipped with the electric shock prevention device 50 according to the second embodiment of the present invention. In this embodiment, portions corresponding to those in FIG. 1 or FIG. 2 are denoted by the same reference numerals, and redundant description is omitted. The electric shock prevention device 50 shown in FIG. 4 is a partial cross-sectional view cut at the same position as the cutting line II-II in FIG. FIG. 4 shows a state where the lever 24 of the circuit breaker 22 is raised, that is, a state where electricity is connected to the wiring connection terminal 27. The difference from the first embodiment shown in FIG. 1 is the shape of the opening / closing restrictor, and other configurations are the same as those of FIG.

  Similarly to the electric shock prevention device 10 shown in FIG. 1, the electric shock prevention device 50 includes the coupling bodies 11 and 12 that can be attached to the lever 24 of the circuit breaker 22, and the opening / closing restriction body 51. The opening / closing restriction body 51 shown in the present embodiment is obtained by fixing the plate-like body 51 to the connecting rod 12 and has a rectangular cross-sectional shape. Even if the opening / closing restricting body is a plate-like body 51 as shown in the present embodiment, an electric shock can be reliably prevented, as in the case of the recessed body 13 having a concave cross-sectional shape.

  The electric shock prevention mechanism of the electric shock prevention device 50 is the same as the electric shock prevention mechanism of the electric shock prevention device 10 shown in FIG. When the lever 24 of the circuit breaker 22 is raised and the power is turned on as shown in FIG. 4, the opening / closing restriction body 51, which is a plate-like body, is also lifted in conjunction with the connecting body 12, and the upper end 52 of the opening / closing restriction body 51. However, since the position is higher than the lower end 43 of the electric shock prevention cover 40, the electric shock prevention cover 40 can be prevented from being opened. When the lever 24 of the circuit breaker 22 is lowered, the electric shock prevention cover 40 can be opened in the same manner as the electric shock prevention device 10 shown in FIG. In the electric shock prevention device 50 shown in FIG. 4, a plate-like body is used for the opening / closing restriction body 51, but a rod-like body can be used instead of the plate-like body.

  As shown in FIG. 4, the opening / closing restriction body can use a plate-like body 51 or a rod-like body, but the opening / closing restriction body 51 needs to have a predetermined length. FIG. 5A and FIG. 5B are diagrams showing an example in which an opening / closing restriction body 60 (60a, 60b) having a short length is used as an opening / closing restriction body as a comparative example of the embodiment of the present invention. FIG. 5A is a perspective view showing the relationship between the electric shock prevention cover 40 and the opening / closing restriction body 60, and FIG. 5B is a plan view showing the relationship between the electric shock prevention cover 40 and the opening / closing restriction body 60. In this comparative example, the same reference numerals are given to portions corresponding to the embodiment of FIG. 1 or FIG.

  The opening / closing restriction body 60 (60a, 60b) shown in FIGS. 5 (a) and 5 (b) is a plate-like body having a rectangular cross section like the opening / closing restriction body 51 shown in FIG. There are no plate-like bodies, and plate-like bodies 60a, 60b having a short length on both sides are fixed to the connecting rods 12a, 12b. When the opening / closing restriction bodies 60a and 60b having such a shape are used, when the circuit breaker 22 is turned on (indicated by a two-dot chain line) as shown in FIG. Cannot be opened from a closed position.

  However, when the electric shock prevention cover 40 is open, the circuit breaker 22 may be turned on. As shown in FIGS. 5A and 5B, since there is no member at the center of the opening / closing restriction body, the opening / closing restriction bodies 60 a and 60 b can be lifted without contacting the electric shock prevention cover 40. If such a state occurs, the power connection may be in contact with the wiring connection terminal 27 while the power is on, so that an electric shock may occur, so that the function of the electric shock prevention device is incomplete.

  In order to prevent this, the opening / closing restriction body may be made longer than the length of the electric shock prevention cover 40. When a space is provided at the center of the opening / closing restriction body, or when the opening / closing restriction body is provided only on the hinge 41 side, the electric shock prevention cover 40 is in a predetermined position, that is, the electric shock prevention cover 40 is temporarily opened. However, if the electric shock prevention cover is not closed to a position where it cannot contact the wiring connection terminal 27, when the lever 24 of the circuit breaker 22 is turned on, the opening / closing restrictor contacts the electric shock prevention cover 40, and the circuit breaker 22 is It is necessary that the opening / closing restriction body has a length that cannot be entered.

  FIG. 6 is a front view of the power supply box 20 equipped with the electric shock prevention device 70 as the third embodiment of the present invention. FIG. 6 shows a state in which the electric shock prevention cover 40 cannot be opened with the circuit breaker 22 turned on. In this embodiment, parts corresponding to those in FIG. 1 or FIG. 2 are denoted by the same reference numerals, and redundant description is omitted. Similarly to the first and second embodiments, the electric shock prevention device 70 shown in FIG. 6 includes the coupling bodies 11, 12 that can be attached to the lever 24 of the circuit breaker 22, and the opening / closing restriction body 71.

  The electric shock prevention device 70 of the third embodiment shown in FIG. 6 is different from the electric shock prevention device 10 shown in FIG. 1 in that the electric shock prevention cover 40 moves up and down in conjunction with the lever 24 of the circuit breaker 22, 71 is fixed to the casing 21. The connecting rods 12 a and 12 b have a hinge fixing base 42, and the electric shock prevention cover 40 is attached to the hinge fixing base 42 through a hinge 41 so as to be opened and closed. Therefore, when the lever 24 of the circuit breaker 22 is moved up and down, that is, when the power is turned on and off, the coupling bodies 11 and 12 and the electric shock prevention cover 40 are moved up and down in conjunction with the lever 24. Since the electric shock prevention cover 40 has a hinge 41 on one side and is fixed to the hinge fixing base 42 via the hinge 41, the electric shock prevention cover 40 can be rotated in the horizontal direction around the hinge 41. On the other hand, the opening / closing restricting body 71 is a rotation direction of the electric shock prevention cover 40, and when the electric shock prevention cover 40 is lifted, a slight gap is formed on the front side of the electric shock prevention cover 40 from the front portion of the electric shock prevention cover 40. Is fixed to the housing 21.

  An electric shock prevention mechanism of the electric shock prevention device 70 will be described. When the lever 24 of the circuit breaker 22 is lowered to turn off the power, the coupling bodies 11 and 12 attached to the lever 24 are also lowered in conjunction with the lever 24. The electric shock prevention cover 40 fixed to the coupling bodies 11 and 12 is also lowered integrally with the coupling bodies 11 and 12. In a state where the lever 24 of the circuit breaker 22 is lowered, the upper end 45 of the electric shock prevention cover 40 is located at a position lower than the lower end 72 of the opening / closing restriction body 71. Therefore, when the circuit breaker 22 is in the cut-off state, the electric shock prevention cover 40 can be opened (turned). At this time, since no electricity is conducted to the wiring connection terminal 27, no electric shock is caused even if it contacts the wiring connection terminal 27.

  On the other hand, when the lever 24 of the circuit breaker 22 is raised and the power is turned on, the coupling bodies 11 and 12 attached to the lever 24 are also raised in conjunction with the lever 24. The electric shock prevention cover 40 fixed to the connection body is also lifted together with the connection bodies 11 and 12. In the state where the lever 24 of the circuit breaker 22 is raised, the upper end 45 of the electric shock prevention cover 40 is located higher than the lower end 72 of the opening / closing restriction body 71 as shown in FIG. Further, similarly to the first embodiment, the opening / closing restriction body 71 is positioned in the direction in which the electric shock prevention cover 40 rotates when the electric shock prevention cover 40 is lifted, and on the front side of the electric shock prevention cover 40. Therefore, when the circuit breaker 22 is in the on state, the electric shock prevention cover 40 cannot be opened (turned). When the circuit breaker 22 is in the on state, electricity is conducted to the wiring connection terminal 27, but since the electric shock prevention cover 40 cannot be opened, there is no electric shock due to contact with the wiring connection terminal 27.

  FIG. 7 is a front view of the power supply box 20 equipped with the electric shock prevention device 80 as the fourth embodiment of the present invention. FIG. 7 shows a state where the electric shock prevention cover cannot be removed with the circuit breaker turned on. 8 is a partial cross-sectional view taken along the cutting line VIII-VIII in FIG. In this embodiment, portions corresponding to those in the embodiment of FIGS. 1, 2, and 6 are denoted by the same reference numerals, and redundant description is omitted.

  The electric shock prevention device 80 of the fourth embodiment shown in FIGS. 7 and 8 is similar to the electric shock prevention device 70 shown in FIG. 6, and the coupling bodies 11 and 12 that can be attached to the lever 24 of the circuit breaker 22 and the attachment / detachment restriction body. 83 is the main configuration. In the present embodiment, similarly to the electric shock prevention device 70 shown in the third embodiment, the electric shock prevention cover 40 moves up and down in conjunction with the lever 24 of the circuit breaker 22. However, in the present embodiment, the electric shock prevention cover 40 is the first electric shock prevention cover 40. Unlike the third embodiment, it does not have a rotating structure. Instead, the electric shock prevention cover 40 is detachably fixed.

  In the fourth embodiment, electric shock prevention cover attaching members 81a and 81b for attaching the electric shock prevention cover 40 to the connecting rods 12a and 12b are fixed. The electric shock prevention cover 40 is detachably attached to the electric shock prevention cover attaching members 81a and 81b using fixing screws 82a and 82b. Therefore, when the lever 24 of the circuit breaker 22 is moved up and down, that is, when the power is turned on and off, the coupling bodies 11 and 12 and the electric shock prevention cover 40 are moved up and down in conjunction with the lever 24. Since the electric shock prevention cover 40 is fixed to the electric shock prevention cover mounting member 81 with the fixing screw 82, the electric shock prevention cover 40 can be removed by removing the fixing screw 82. On the other hand, the attachment / detachment restricting body 83 is fixed to the housing 21 at a position on the front side of the fixing screw 82 that fixes the electric shock prevention cover 40 when the electric shock prevention cover 40 is lifted.

  The electric shock prevention mechanism of the electric shock prevention device 80 will be described. When the lever 24 of the circuit breaker 22 is lowered to turn off the power, the coupling bodies 11 and 12 attached to the lever 24 are also lowered in conjunction with the lever 24. The electric shock prevention cover 40 fixed to the coupling bodies 11 and 12 is also lowered integrally with the coupling bodies 11 and 12. When the lever 24 of the circuit breaker 22 is lowered, the upper end 45 of the electric shock prevention cover 40 is at a position lower than the lower end 84 of the attachment / detachment restricting body 83. Therefore, when the circuit breaker 22 is in a cut-off state, the fixing screw 82 for fixing the electric shock prevention cover 40 can be removed, and the electric shock prevention cover 40 can be removed. At this time, since no electricity is conducted to the wiring connection terminal 27, no electric shock is caused even if it contacts the wiring connection terminal 27.

  On the other hand, when the lever 24 of the circuit breaker 22 is raised and the power is turned on, the coupling bodies 11 and 12 attached to the lever 24 also move up in conjunction with the lever. The connected electric shock prevention cover 40 is also lifted together with the connecting bodies 11 and 12. When the lever 24 of the circuit breaker 22 is raised, the attachment / detachment restricting body 83 is located on the front surface of the fixing screw 82 for fixing the electric shock prevention cover 40 as shown in FIGS. 7 and 8. For this reason, the fixing screw 82 for fixing the electric shock prevention cover 40 cannot be removed, and the electric shock prevention cover 40 cannot be removed. When the circuit breaker 22 is in the on state, electricity is connected to the wiring connection terminal 27, but the electric shock prevention cover 40 cannot be removed, so that the electric shock does not come into contact with the wiring connection terminal 27.

  As described above, in the first to fourth embodiments, as the connecting rod mounting member 11 to be attached to the lever 24 of the circuit breaker 22, the opening is provided in the center of the plate-like body, and the plate-like body 11 is inserted into the lever 24. Although an example is shown, a string may be used instead of the plate-like body 11. A configuration in which a string is attached to the lever 24 and the connecting rod 12 is attached to the string may be employed. In short, it is only necessary to be able to move the opening / closing restriction bodies 13, 51, 71 or the electric shock prevention cover 40 in conjunction with the lever 24 of the circuit breaker 22. Further, in the electric shock prevention device of the present invention including the first to fourth embodiments, it is preferable to take measures to prevent the electric shock prevention device from falling off while operating the lever 24 of the circuit breaker 22. . Furthermore, it is preferable to provide a guide for smoothly moving the electric shock prevention device.

It is a perspective view of the power supply box 20 with which the electric shock prevention apparatus 10 as the 1st Embodiment of this invention was mounted | worn. It is the fragmentary sectional view cut | disconnected by the cutting line II-II of FIG. It is the perspective view of the power supply box 20 which mounted | wore with the electric shock prevention apparatus 10 as the 1st Embodiment of this invention, Comprising: It is the figure which showed the state with the electric shock prevention cover 40 opened. It is a fragmentary sectional view of the power supply box 20 with which the electric shock prevention apparatus 50 as the 2nd Embodiment of this invention was mounted | worn. FIG. 5A and FIG. 5B are diagrams showing an example in which an opening / closing restriction body 60 (60a, 60b) having a short length is used as an opening / closing restriction body as a comparative example of the embodiment of the present invention. It is a front view of the power supply box 20 with which the electric shock prevention apparatus 70 as the 3rd Embodiment of this invention was mounted | worn. It is a front view of the power supply box 20 with which the electric shock prevention apparatus 80 as the 4th Embodiment of this invention was mounted | worn. It is the fragmentary sectional view cut | disconnected by the cutting line VIII-VIII of FIG. It is a part of perspective view of the conventional power supply box 1. FIG.

Explanation of symbols

10, 50, 70, 80 Electric shock prevention device 11 Connecting rod mounting member 12 Connecting rod 13, 51, 71 Opening / closing restricting body 14 Plate-like portion on the front side of the recessed portion 15 Upper end of the plate-like portion on the front side of the recessed portion 16 Recessed portion Plate-like part at the bottom of the body 20 Power supply box 21 Housing 22 Circuit breaker 23 Wiring connection part 24 Lever 27 Wiring connection terminal 40 Electric shock prevention cover 41 Hinge 43 Electric shock prevention cover lower end 44 Electric shock prevention cover front part 45 Electric shock prevention cover upper end 72 Opening and closing Limit member lower end 82 Fixing screw 83 Detachment restriction body 84 Detachment restriction body lower end

Claims (8)

Breaker in the enclosure, the wiring connecting terminals, and to limit the opening and closing of the electric shock prevention cover of the power supply box with a shock prevention cover openable wire connection terminal, an electric shock preventing device for preventing electric shock,
Is detachably mounted on the lever of the circuit breaker, a connection member that moves in conjunction with the turning on or off of the lever,
The fixed to the connecting body motion in conjunction with the turning on or off of the lever, viewed including the opening and closing limit member for limiting the opening and closing of the electric shock prevention cover,
When the electric shock prevention cover is open, if the circuit breaker is to be turned on, the open / close restrictor comes into contact with the electric shock prevention cover, and the electric circuit breaker is not turned on. apparatus. Open the electric shock prevention cover closed possible wiring connection terminals is rotated around the one side,
The opening limit member, said when breaker enters the is located within a range in which the electric shock prevention cover is rotated, the to prevent rotation of the electric shock prevention cover, when the previous SL breaker off, the electric shock The electric shock prevention device according to claim 1, wherein the electric shock prevention cover is located outside a range in which the prevention cover rotates and does not block the rotation of the electric shock prevention cover. Open the electric shock prevention cover closed possible wiring connection terminal is a plate-like body has a hinge at one end, rotates in a horizontal direction around the hinge,
The open / close restriction body has a slight gap with the electric shock prevention cover when the circuit breaker is turned on , is in the rotation direction of the electric shock prevention cover, and is located in front of the electric shock prevention cover, the prevents the rotation of the electric shock prevention cover, when the cut is pre-Symbol breaker located below the electric shock prevention cover, claim 2, characterized in that does not prevent the rotation of the electric shock prevention cover The electric shock prevention device described in 1. Breaker in the enclosure, the wiring connecting terminals, and to limit the opening and closing of the electric shock prevention cover of the power supply box with a shock prevention cover openable wire connection terminal, an electric shock preventing device for preventing electric shock,
A closing limit member fixed to the housing,
The breaker lever detachably mounted on the, seen including and a connecting member that moves in conjunction with the turning on or off of the lever,
The electric shock prevention cover is openably secured to the connecting member, the motion in conjunction with the turning on or off of the lever,
Prior Symbol opening limiter, the when breaker enters the becomes a range that the electric shock prevention cover is opened and closed, the electric shock prevention cover is opened and closed is prevented, the when breaker off of the electric shock prevention cover is opened and closed An electric shock prevention device, wherein the electric shock prevention cover is rotatable. Breaker in the enclosure, the wiring connecting terminals, and limits the detachable wiring connection the electric shock prevention cover detachable power box with a shock prevention cover terminals, an electric shock preventing device for preventing electric shock,
Is detachably mounted on the lever of the circuit breaker, a connection member that moves in conjunction with the turning on or off of the lever,
The fixed to the connecting body motion in conjunction with the turning on or off of the lever, and detachable limiter for limiting detachment of the electric shock prevention cover,
A device for preventing electric shock, comprising: The electric shock prevention cover of the detachable wiring connection terminal is detachably fixed in the housing with a fixing screw,
The detachable limiter, said when breaker enters of the located to a range to remove the fixing screws impossible, to prevent removal of the electric shock prevention cover, when the cut is pre-Symbol breaker the fixing screw The electric shock prevention device according to claim 5 , wherein the electric shock prevention device is located in a range in which the electric shock prevention cover can be removed and does not prevent removal of the electric shock prevention cover. A circuit breaker that turns on and off electricity,
A wiring connection terminal to which electrical wiring can be connected;
And prevent electric shock cover reclosable wiring connection terminals,
The electric shock prevention device according to any one of claims 1 to 4 ,
The breaker, the wiring connecting terminals, and the electric shock prevention cover, and the electric shock prevention device capable of housing enclosure,
Power supply box characterized by including. A circuit breaker that turns on and off electricity,
A wiring connection terminal to which electrical wiring can be connected;
Wear and shock prevention cover detachable wiring connection terminals,
The electric shock prevention device according to claim 5 or 6 ,
The breaker, the wiring connecting terminals, and the electric shock prevention cover, and the electric shock prevention device capable of housing enclosure,
Power supply box characterized by including.

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