JP2002305811A - Connection changer and distribution board using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a connection changer which is put between electric wire conductors and an insertion-connecting type circuit breaker, and connects the wire conductors and the insertion-connecting type circuit breaker electrically, and to provide a distribution board for housing which uses the connection changer. SOLUTION: Holding grooves 70b opened in the left side surfaces are formed in a base 70a of the connection changer 70 for inserting and holding terminal boards 71, 71. The connection changer has terminal blocks 72a, 72b on both longitudinal end parts of the base 70a. For the terminal boards 71, 71, terminal areas 71b fitted with terminal screws for connecting the wire conductors and arranged on the terminal blocks 72a, 72b, and inserting blades 71a, which are for insertion-connecting terminal areas of a primary feed switch composed of a circuit-breaker and arranged projecting from one transverse side surface of the base 70a, are provided with stepped parts 71c between into a continuous united body. The terminal areas 71b, 71b are screwed by driving terminal screws 73a, 73b into terminal holes 76, 76.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connection conversion device interposed between a wire conductor and a plug-in type (plug-in type) circuit breaker for electrically connecting the wire conductor and the circuit breaker. It relates to a distribution board for a house using the same.

[0002]

2. Description of the Related Art Generally, a distribution board for a house used for each customer such as an apartment house or a condominium is used for an emergency device such as a fire alarm or a fire extinguisher provided in each customer. An emergency power supply system is provided to obtain emergency power from the primary side (power supply side) of the main switch to ensure power supply.
A primary feed switch is inserted in the emergency power supply system. Here, the input side of the primary feed switch is connected to the primary side of the main switch via a feed line.

In recent years, the present applicant has proposed a power supply side connection system as a branch switch connected to the secondary side (load side) of a main switch for the purpose of shortening the installation time of a distribution board. A distribution board using a plug-in type (so-called plug-in type) circuit breaker (see, for example, JP-A-11-187517) has been proposed. In such a plug-in type circuit breaker, an electric wire conductor can be connected to the power supply side without using a terminal screw, so that the construction time can be reduced.

[0004]

By the way, in order to make the circuit breaker common to the disassembly switch and the primary feed switch,
It is conceivable to use a plug-in circuit breaker as the primary feed switch, but the feed line is simply a covered wire, and the primary feed switch is a screw-type circuit that connects the wire conductor at the end of the feed line. Must use circuit breakers,
The primary feed switch could not be a plug-in type circuit breaker.

The present invention has been made in view of the above circumstances, and has as its object to interpose a wire conductor and a plug-in type circuit breaker interposed between the wire conductor and the plug-in type circuit breaker. It is an object of the present invention to provide a connection conversion device capable of electrically connecting the same and a power distribution board for houses using the same.

[0006]

According to a first aspect of the present invention, in order to achieve the above object, an electric wire is interposed between a wire conductor and a plug-in type circuit breaker to electrically connect the wire conductor and the circuit breaker. A connection conversion device for electrically connecting, a base having terminal blocks at both ends in a longitudinal direction, a terminal portion provided with the terminal screw and having a terminal screw for connecting an electric wire conductor, and a short direction of the base. And two terminal plates of the same shape, which are provided so as to protrude from one side surface and are connected and connected to the circuit breaker, are formed integrally and continuously through a stepped portion. Are arranged so that the insertion blades face each other and the thickness direction of the insertion blades is reversed, and the base is opened to the other side in the short direction and accommodates at least the step portion of the terminal plate. Characterized in that a groove is formed, the end being provided on the terminal block and connecting the electric wire conductor. Two identical shapes in which a threaded terminal portion and an insertion blade projecting from one side surface of the base in the short direction and inserted and connected to a circuit breaker are formed continuously and integrally via a step portion. With the terminal board of the above, a plug-in type circuit breaker can be used as the primary feed switch, so that the branch switch and the primary feed switch can use the same circuit breaker of the same configuration. In addition, each terminal plate is arranged so that the insertion blades face each other and the front and back sides of the insertion blade in the thickness direction are reversed, so that the two terminal plates are shared and the terminal portion is formed. The insulation distance between the insertion blades can be increased compared to the case where the insertion blades are formed on the same surface, and the common use of two terminal plates facilitates the terminal plate manufacturing work and reduces cost. And parts management becomes easy. In addition, the terminal portion of each terminal plate and the insertion blade are continuously and integrally formed via the step portion, and the base has a storage groove for storing at least the step portion. The movement of the terminal board to the terminal can be restricted.

According to a second aspect of the present invention, in the first aspect of the invention, the front surfaces of the terminal blocks are formed at different positions from the mounting surface, so that the distance between the terminal plates is further increased. And the insulation distance can be increased.

According to a third aspect of the present invention, in the first or second aspect of the present invention, a cover made of an insulating material covering at least the front side and the other side of the base is attached to the base. The terminal board can be insulated.

According to a fourth aspect of the present invention, in the third aspect of the invention, a hooking projection is provided on the other side and the front surface of the base in the short side direction, and a hooking hole hooked on the hooking projection is provided in the cover. Therefore, the work of attaching the cover is facilitated.

According to a fifth aspect of the present invention, in the invention of the fourth aspect, the hooking projection provided on the other side surface of the base has a front end portion extending toward the other side surface and provided on a front surface of the base. Since the leading end of the hooking projection extends in the projecting direction of the insertion blade, the cover is interposed between the hooking projection provided on the other side of the base and the other side of the base. And the cover is less likely to come off.

According to a sixth aspect of the present invention, there is provided a box main body having a front opening which is entirely surrounded by a side plate, and a handle which is operated up and down, and is disposed in the box main body with the handle as a front side. A main switch, a conductive bar electrically connected to the load-side terminal of the main switch, and disposed in the box main body so as to extend in the left-right direction, and a handle having a vertically operated handle Branch switch consisting of a plurality of circuit breakers, which are arranged in two upper and lower stages in the box body with the front side as the front side, and the power supply side terminal section is inserted and connected to the conductive bar, and an electric circuit on the power supply side with respect to the main switch The base is disposed in the box main body so that one side of the base is opposite to the main switch in the left-right direction and is opposite to the branch switch in the left-right direction. 6. The connection conversion device according to claim 1, wherein the connection conversion device is operated up and down. From the two circuit breakers which are arranged in the upper and lower two stages in the box body on the opposite side of the main switch in the left and right direction with respect to the main switch and are connected to the insertion blades from above and below respectively. And a primary feed switch that is located between the main switch and the connection conversion device in the left-right direction, so that the connection conversion is performed in the left-right direction. Since the base of the device is located outside the primary feed switch, the work of connecting the wire conductor to the terminal of the connection conversion device is facilitated.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In this embodiment, as shown in FIGS. 4 to 6, a main body switch 31, a plurality of branch switches 32, and two primary feed switches 33 are used as inner units. 1
A distribution board for a house arranged in a branch switch 32
Are arranged in two upper and lower stages. The box 1 is a synthetic resin molded product, and includes a box body 10 having a rectangular frame shape, and a lid 20 coupled to the front side (the right side in FIG. 5) of the box body 10.

The box body 10 includes a back plate 1 formed in a rectangular frame shape.
A side plate 12 is formed so as to protrude forward over the entire outer peripheral edge of the outer peripheral edge 1, and an opening window 13 opened in a rectangular shape is formed in the back plate 11. Two upper and lower support bases 14a, 15a are respectively protruded from both left and right end portions of the back plate 11, and each of the support bases 14a, 15a has an L-shaped cross section and forms a corner of a rectangular area. Guide walls 14 arranged in
b and 15b are formed. A retaining boss 14c is formed on the upper support base 14a, adjacent to the lower side, and whose protrusion from the back plate 11 is slightly larger than the support base 14a. A lower half of the receiving piece 15c is formed continuously and integrally on the front end face of the guide wall 15b provided around the lower support 15a. The size from the back plate 11 to the receiving piece 15c is the back plate 11
Is set slightly larger than the dimension from to the tip end surface of the support base 15a. A large number of through holes 16 are formed on the upper and lower peripheral edges of the opening window 13 of the back plate 11 at equal pitches in the left-right direction. A middle rail 17 is attached to a middle part of the opening window 13 in the left-right direction by using a fixing screw 17a screwed into the upper and lower through holes 16. Upper and lower two mounting tables 18a, 19a are formed on the middle crosspiece 17, and a lower receiving table 19a is formed with a receiving piece 19 having an L-shaped cross section similarly to the receiving piece 15c.
b is provided.

On the other hand, the outer peripheral surface of the rear end of the lid 20
0, four window holes 21a to 21d, which are substantially coincident with the outer peripheral surface of the front end of the side plate 12 and are formed in a rectangular shape, are opened.
a to 21c are handles 31 of a main switch 31, a branch switch 32, and a primary feed switch 33 housed in the box body 10.
a, 32a, and 33a are provided to expose the front side.

The support stands 14a, 15a on the left side of the opening window 13 formed in the back plate 11 of the box body 10 and the middle rail 17
The main switch 3 is located between the mounting tables 18a and 19a.
A first frame 40 for mounting the branch switch 32 is provided between the support tables 14a and 15a on the right side of the opening window 13 and the mounting tables 18a and 19a provided on the middle crosspiece 17. It will be erected. First frame 40 and second frame 5
0 is connected and integrated with each other.

When the first frame 40 and the second frame 50 are connected to each other, they form a rectangular shape as a whole, and support pieces 41, 41 project from the upper and lower ends of the left edge, respectively. Each has a shape in which support pieces 51, 51 are protruded. Each of the support pieces 41 and 51 is attached to a part of the upper edge of a large-diameter portion having a round hole shape larger than the diameter of the head of the mounting screw 25 (see FIG. 6) screwed into the support bases 14a and 15a. Mounting holes 41a and 51a are respectively formed in a keyhole shape in which a groove portion narrower than the diameter of the screw 25 is continuous. Therefore, with the mounting screw 25 loosely screwed into each of the supports 14a, 15a, the mounting holes 41a, 5
1a, the first mount 40 and the second mount 50 are easily attached to the box body 10 by sliding the head of the mounting screw 25 to a portion corresponding to the groove, and then tightening the mounting screw 25. Can be. Further, as described above, the guide walls 14 are provided around the support bases 14a and 15a.
Since the b and 15b are formed, the first gantry 40 can be easily positioned by adjusting the mounting position to the guide walls 14b and 15b. Furthermore, since the receiving pieces 15c and 19b are formed on the lower guide wall 15b and the middle crosspiece 17, respectively, a part of the first and second pedestals 40 and 50 is overlapped on the rear side of the receiving pieces 15c and 19b. By doing so, even if the mounting screw 25 is removed, the load of the first mount 40 and the second mount 50 can be received by the receiving pieces 15c and 19b.

The mounting screws 2 are provided in the grooves of the mounting holes 41a and 51a.
5, the position of the retaining boss 14c is set so that the retaining boss 14c is inserted into the large-diameter portion of the mounting hole 41a, 51a, and after the mounting screw 25 is tightened, the support piece 41, Reference numeral 51 denotes a stopper for the box body 10. Further, by inserting the retaining boss 14c into the large-diameter portion of the mounting holes 41a, 51a, it is possible to prevent the support pieces 41, 51 from rattling with respect to the box body 10 even if the mounting screw 25 is slightly loosened. For example, even if the mounting screw 25 is loosened due to an external vibration such as an earthquake,
It is possible to prevent the first frame 40 and the second frame 50 from moving or dropping with respect to the box body 10.

As shown in FIGS. 6 to 8, the first mount 40 is a vertically long rectangular sheet metal (iron plate) whose upper and lower widths are smaller than the upper and lower widths of the opening window 13 formed in the box body 10. Is formed. A pair of upper and lower support pieces 41 protrude from the left side edge of the first gantry 40, and a pair of upper and lower connection pieces 42 protrude from the right side edge. The connecting piece 42 has a supporting piece 41
A keyhole-shaped connection hole 42a similar to that of FIG.
A stop hole 42b is formed adjacent to the right side of a.

On the left side of the first base 40, two connecting holes 4 are provided.
0a is formed. In the present embodiment, the main switch 3
A power supply system is provided to obtain power from the power supply side (primary side) of the main switch 31 without passing through the main switch 31 so that power to the fire alarm and the like can be secured even when the power switch 1 is shut off. In this power supply system, a primary feed switch 33 as an internal unit housed in the box body 10 is inserted. The primary feed switch 33 has the same configuration as the branch switch 32, and is provided with three slit-shaped terminal portions 34a to 34c into which a conductive bar (described later) is inserted and connected. In the primary feed switch 33, the central terminal portion 34b
Is not provided with a member (receiving blade) for connecting the conductive bar, and only the terminal portions 34a and 34c are used. Further, a mounting groove 35 is formed on one end face in the longitudinal direction of the body of the primary feed switch 33.

An auxiliary mounting plate 60 is used as a member for mounting the primary feed switch 33 to the box body 10. The auxiliary mounting plate 60 is formed in a rectangular shape that is long in the vertical direction, and has two connecting pieces 62 extending at both upper and lower ends via step portions 61. A connection hole 62a is formed in each connection piece 62, and a connection screw 63 is screwed into the connection hole 40a provided in the first gantry 40 through the connection hole 62a, whereby the auxiliary mounting plate 60 is connected to the first gantry 40. You. Here, the provision of the stepped portion 61 absorbs a difference in height between the main switch 31 and the primary feed switch 33, and the main switch 31 has a surface on which the handle 31a is formed and a primary feed switch. The surface on which the handle 33a is formed in the switch 33 can be made substantially flush with the surface.

The width of the auxiliary mounting plate 60 in the left-right direction is substantially equal to that of the primary feed switch 33.
On the front surface of the upper end portion of the upper side, a mounting locking piece 64 inserted into the mounting groove 35 of the upper primary feed switch 33 is cut and raised. Further, a fixing hole 69 for mounting a mounting locking plate 67 inserted into the mounting groove 35 of the lower primary feed switch 33 is formed on the front surface of the lower end portion of the auxiliary mounting plate 60. The locking mounting plate 67 is fixed by being inserted into an insertion hole 67 a formed in the mounting locking plate 67 and screwed into the fixing hole 69.

An auxiliary piece 65 for mounting the base 70a of the connection conversion device 70 extends from a left end edge of an intermediate portion in the longitudinal direction of the auxiliary mounting plate 60, and is provided at both ends of the auxiliary piece 65 in the longitudinal direction. Each has a fixing hole 65a.

As shown in FIGS. 1 to 3 and 8, the connection conversion device 70 has two terminal plates 71 inserted and held in a base 70a of a synthetic resin molded product. Connection conversion device 7
0 is the box body 10 with the longitudinal direction of the base 70a as the vertical direction.
Terminal blocks 72a,
72b. The terminal blocks 72a and 72b are formed so as to have different protrusion dimensions from the mounting surface (the front surface of the auxiliary piece 65), and the distance from the mounting surface to the front surface of the terminal block 72a is greater than the distance from the mounting surface to the front surface of the terminal block 72b. It is longer than the distance.

The terminal plates 71, 71 are connected to terminal blocks 72a, 72, respectively.
b, and a primary feed switch 33 composed of a circuit breaker and protruding from the right side of the base 70a in the left-right direction (transverse direction). The insertion blade 71a into which the terminal portions 34a and 34c are inserted from above and below is formed continuously and integrally via the stepped portion 71c. Insertion grooves 78, 78 through which the terminal screws 73a, 73b are inserted are formed in the front walls of the terminal blocks 72a, 72b, and the terminal screws 73a, 73b are formed in the terminal portions 71b, 71b.
Terminal holes 76, 76 into which the screws 73b are screwed are formed. The base 70a is formed with a storage groove 70b opened on the left side for inserting and holding the terminal plates 71, 71. Stopping pieces 70c, which hold the terminal plates 71, 71, are formed at the opening edges of the storage grooves 70b, 70b. 70c are formed. The insertion blades 71a, 7
Insertion holes 70f, 70f into which 1a is inserted are formed. Here, each storage groove 70b, 70b is connected to the terminal plate 71,
71 and the base of the insertion blades 71a, 71a and the stepped portion 7
1, 71 are opened in an L-shape so as to be accommodated therein, and the dimension in the front-rear direction of the portion in which the step portions 71, 71 are accommodated is set to the same value. Also, the step portions 71, 71
Is formed along the direction in which the distance between the insertion blades 71a, 71a increases in the thickness direction of the insertion blades 71a, 71a.

The terminal portions 71b, 71 of the terminal plates 71, 71
The wire conductors of the two connection wires 84 are connected to the terminal b by using the respective terminal screws 73a and 73b. Each of the terminal plates 71 and 71 is connected to one of the power supply terminals 31b of the main switch 31 via the connection wires 84. Connected to the voltage pole and the neutral pole, respectively. In addition, terminal portions 71b,
Since the upright walls 72c and 72d abut on a part of the periphery of the 71b, the rattle of the terminal plates 71 and 71 can be prevented when the terminal screws 73a and 73b are tightened.

Further, two mounting pieces 74 corresponding to the fixing holes 65a of the auxiliary pieces 65 extending from the auxiliary mounting plate 60 are formed on the base 70a, and are inserted through the insertion grooves 74a of the mounting pieces 74. By screwing the fixing screw 75 into the fixing hole 65a, the base 70a is fixed to the auxiliary piece 65 (that is, fixed to the auxiliary mounting plate 60). On the front and left side surfaces of the base 70a, hooking projections 70d and 70e are projected, and hooking projections 70d and 70e are formed on hooking holes 77a and 77b of a cover 77 formed of an insulating material having a U-shaped cross section.
e, the cover 77 covers the front and left side surfaces of the base 70a and the terminal portions 34a to 34c in the vertical direction of the primary feed switch 33 so as to cover the base 70a.
a, and the terminal plates 71 can be insulated.

Here, the hooking projection 70e has a portion projecting from the front surface of the base 70a, and the insertion blade 71
a is formed in an inverted L-shape having a portion extending in the protruding direction of a. Also, the hooking projection 70d is
a is formed in an L-shape having a portion projecting from the left side surface and a portion projecting forward from the tip of the portion,
Further, a portion extending from the tip of the L-shaped portion in the projecting direction of the insertion blade 71a is formed. That is, the hooking projection 70d has a portion protruding toward the left side surface of the base 70a. Here, the projecting dimension of the portion of the hooking projection 70d projecting in the projecting direction of the insertion blade 71a is set smaller than the projecting dimension of the portion of the hooking projection 70e projecting in the projecting direction of the insertion blade 71a.

Accordingly, the cover 77 is provided with the hooking projection 70e.
Is slid leftward from the state where it is inserted into the hooking hole 77b, so that the hooking projection 70e is overlapped on the periphery of the hooking hole 77b, and the hooking projection 70d is inserted into the hooking hole 77b.
The cover 77 is held on the base 70 a of the connection conversion device 70 by being inserted into the hook a. In short, the hooking projection 70d projecting from the left side of the base 70a and the hooking projection 70e projecting from the front face have the same hooking direction,
Since a part of the cover 77 can be hooked so as to be sandwiched between the hooking projection 70d and the left side surface of the base 70a, the cover 77 does not easily come off. Note that the cover 77 has four insertion holes 77c into which two binding projections 39, which are provided at the ends on the side of the terminal portions 34a to 34c on the front surface of the primary feed switch 33, respectively, are inserted. Is formed.

In the connection conversion device 70, the terminal portions 71b, 71b provided with the terminal screws for connecting the electric wire conductors, which are disposed on the terminal blocks 72a, 72b, and protrude from one side in the short direction of the base 70a. The insertion blades 71a, 71a, which are provided in the manner described above and which insert and connect the circuit breaker, have step portions 71c, 71c.
Two terminal plates 7 of the same shape formed continuously and integrally through
1 and 71, the primary feed switch 33
Can be used as the connection breaker, so that the branch switch 32 and the primary feed switch 33 can use the same circuit breakers, and the terminal board 7
Since the insertion blades 71a, 71a face each other and the insertion blades 71a, 71a are arranged such that the front and back sides in the thickness direction of the insertion blades 71a, 71a are reversed, the two terminal plates 71, 71 are shared. However, the terminal portions 71b, 71b and the insertion blades 71a, 71a
Are formed on the same surface, the insertion blades 71a, 71
a can be increased, and the two terminal plates 71, 71
Is common, the work of manufacturing the terminal plates 71, 71 is facilitated, the cost can be reduced, and the parts management becomes easy.

The terminal portions 71 of each terminal plate 71, 71
b, 71b and the insertion blades 71a, 71a are stepped portions 71c,
The storage groove 70 is formed integrally and continuously through the base 71a, and at least the step portions 71c, 71c are stored in the base 70a.
b, 70b are formed, so that the steps 71c, 71
The movement of the terminal plates 71 in the thickness direction of c can be restricted.

The second frame 50 for mounting the branch switch 32
Is formed of a sheet metal (iron plate), and has a support piece 51 protruding from an upper end and a lower end of a right edge, and a connecting piece 52 protruding from an upper end and a lower end of a left end.
The support piece 51 is formed with the keyhole-shaped mounting hole 51a as described above. The connection piece 52 is provided with a connection protrusion 52a, and a set screw hole (not shown) is provided near the right side of the connection protrusion 52a. Are formed. The connection protrusion 52a is provided on the first frame 40.
The connection screw 53 is inserted into the large diameter portion of the connection hole 42a provided in the connection piece 42, and the connection screw 53 is screwed into the above-mentioned set screw hole through the stop hole 42b.

Accordingly, the connecting piece 42 of the first gantry 40 is superimposed on the front side of the connecting piece 52 of the second gantry 50, the connecting projection 52a is inserted into the connecting hole 42a, and the connecting screw 53 is inserted through the stopper hole 42b. The first mount 40 and the second mount 50 are coupled by screwing into the set screw holes. With this configuration, even if the connection screw 53 is slightly loosened, the first frame 40 and the second frame 50 do not come off.

On the front side of the second gantry 50, a bar support member 80 made of a synthetic resin molded product is attached. The bar supporting member 80 includes three conductive bars 90a, that is, a neutral conductive bar 90a and two voltage conductive bars 90b and 90c.
~ 90c are supported. The conductive bars 90a to 90c attached to the bar support member 80 are electrically connected to the load-side terminals 31c, 31c, 31c of the main switch 31. Load-side terminals 31c, 31c, 31c and conductive bar 90
The terminals a, 90b, and 90c are connected using terminal screws 93, 96, and 96 so as not to come off.

The conductive bars 90a to 90c are connected to the branch switch 32.
Are connected to each other, as described above.
Eight branch switches 32 are arranged in stages. The branch switch 32 has the same shape as the primary feed switch 33,
On the power supply side, three slit-shaped terminals (not shown) are provided. Each branch switch 32 is connected to each conductive bar 90.
a, 90b, and 90c are electrically connected to only two of them, and the other is treated as a dummy. The branch switch 32 is fixed to the bar support member 80.

When the branch switch 32 is fixed to the bar support member 80, a gap is formed between the upper and lower branch switches 32. A binding member 100 is attached to the front surface of the branch switch 32 so as to cover this gap. The binding member 100 is fixed to the conductive bar 90a. A bundling piece 103 is formed on the bundling member 100 and extends to a position overlapping the front surface of each of the upper and lower branching switches 32. A cutout groove 104 provided at the tip of the bundling piece 103 protrudes from the front side of the branching switch 32. The upper and lower branch switches 32 are connected to the binding pieces 103 by engaging with the formed binding projections 39.

As described above, the main switch 31 and the primary feed switch 33 are attached to the first gantry 40, and the branch switch 32 is attached to the second gantry 50.
The branch switch 32 and the primary feed switch 33 have the same configuration. The main switch 31, the branch switch 32, and the primary feed switch 33 are all disposed such that the handles 31a to 33a are on the front side, and the moving direction at the time of opening and closing the handles 31a to 33a is the vertical direction. It is arranged so that it becomes. The two-stage branch switch 32 is arranged such that the upper and lower positional relationship between the open and closed operating positions of the handle is reversed.

Also, in the residential distribution board of this embodiment, the primary feed switches 33, 33 are located between the main switch 31 and the base 70a of the connection converter 70 in the left-right direction. The base 70a of the connection conversion device 70 is located outside (to the left of) the primary feed switches 33, 33 in the left-right direction, and the terminal portions 71b, 71 of the connection conversion device 70.
The work of connecting the wire to b becomes easy.

[0038]

According to the first aspect of the present invention, there is provided a connection conversion device interposed between an electric wire conductor and a plug-in type circuit breaker for electrically connecting the electric wire conductor and the circuit breaker. A base having terminal blocks at both ends in the direction, a terminal portion provided on the terminal block and having a terminal screw for connecting an electric wire conductor, and a circuit disposed so as to protrude from one side in the short direction of the base. An insertion blade that inserts and connects the circuit breaker includes two identically shaped terminal plates that are continuously and integrally formed via a stepped portion, and each terminal plate has the insertion blades facing each other and the insertion blades The terminal base is arranged in a manner that the front and back in the thickness direction are reversed, and the base is formed with a storage groove which is opened on the other side surface in the short direction and in which at least a step portion of the terminal plate is stored. Terminals with terminal screws connected to the wire conductors and protruding from one side in the short direction of the base The insertion blade, which is arranged in the form and inserts and connects the circuit breaker, has two identically shaped terminal plates that are continuously and integrally formed through the stepped portion, so that the insertion connection is made as a primary feed switch Since a circuit breaker of the type can be used, a circuit breaker having the same configuration can be used for the branch switch and the primary feed switch. The insertion blade is arranged so that the front and back in the thickness direction of the insertion blade are reversed, so that the terminal blade and the insertion blade are formed on the same surface while the two terminal boards are shared. Since the insulation distance between them can be increased and the two terminal boards are shared, there is an effect that the work of manufacturing the terminal boards becomes easy, the cost can be reduced, and the parts management becomes easy. In addition, the terminal portion of each terminal plate and the insertion blade are continuously and integrally formed via the step portion, and the base has a storage groove for storing at least the step portion. This has the effect of restricting the movement of the terminal plate to the terminal.

According to a second aspect of the present invention, in the first aspect of the present invention, the front surfaces of the terminal blocks are formed at different positions from the mounting surface, so that the distance between the terminal plates is further increased. This has the effect that the insulation distance can be increased.

According to a third aspect of the present invention, in the first or second aspect of the present invention, a cover made of an insulating material covering at least the front side and the other side of the base is attached to the base. This has the effect that the terminal board can be insulated.

According to a fourth aspect of the present invention, in the third aspect of the present invention, a hooking projection is provided on the other side and the front surface of the base in the short side direction, and a hooking hole hooked on the hooking projection is provided in the cover. Therefore, there is an effect that the work of attaching the cover is facilitated.

According to a fifth aspect of the present invention, in the invention of the fourth aspect, the hooking projection provided on the other side surface of the base has a tip portion extending toward the other side surface and provided on a front surface of the base. Since the leading end of the hooking projection extends in the projecting direction of the insertion blade, the cover is interposed between the hooking projection provided on the other side of the base and the other side of the base. And the cover is less likely to come off.

According to a sixth aspect of the present invention, there is provided a box body having a front opening with the entire periphery of the back plate being surrounded by a side plate, and a handle which is operated up and down and disposed inside the box body with the handle as a front side. A main switch, a conductive bar electrically connected to the load-side terminal of the main switch, and disposed in the box main body so as to extend in the left-right direction, and a handle having a vertically operated handle Branch switch consisting of a plurality of circuit breakers, which are arranged in two upper and lower stages in the box body with the front side as the front side, and the power supply side terminal section is inserted and connected to the conductive bar, and an electric circuit on the power supply side with respect to the main switch The base is disposed in the box main body so that one side of the base is opposite to the main switch in the left-right direction and is opposite to the branch switch in the left-right direction. 6. The connection conversion device according to claim 1, wherein the connection conversion device is operated up and down. From the two circuit breakers which are arranged in the upper and lower two stages in the box body on the opposite side of the main switch in the left and right direction with respect to the main switch and are connected to the insertion blades from above and below respectively. And a primary feed switch which is located between the main switch and the connection converter in the left-right direction, so that the base of the connection converter in the left-right direction is It is located outside the primary feed switch and has the effect that the work of connecting the wire conductor to the terminal of the connection converter is facilitated.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a connection conversion device according to the present invention.

FIG. 2 is a front view of the same.

FIG. 3 is a side view of the same.

FIG. 4 is a front view of a residential power distribution panel using the same as above.

FIG. 5 is an exploded perspective view of a residential distribution board using the above.

FIG. 6 is a partially cutaway front view showing a state where a cover of the residential distribution board using the above is removed.

FIG. 7 is a front view of an essential part of a residential distribution board using the above.

FIG. 8 is an exploded perspective view of a main part of a residential distribution board using the above.

[Explanation of symbols]

 70 Connection Conversion Device 70a Base 70b Storage Groove 71 Terminal Plate 71a Insert Blade 71b Terminal 72a, 72b Terminal Block 73a, 73b Terminal Screw 76 Terminal Hole

 ────────────────────────────────────────────────── ─── Continuing from the front page (72) Inventor Hideki Yoshida 55th Haruki-La part, Toya-cho, Kashima-gun, Ishikawa Prefecture F-term in Hita Electric Co., Ltd. 5G016 AA03 DA24 DA26

Claims (6)

[Claims] 1. A connection converter interposed between an electric wire conductor and a plug-in type circuit breaker for electrically connecting the electric wire conductor and the circuit breaker, wherein terminals are provided at both ends in the longitudinal direction. A base having a base, a terminal part with terminal screws provided on the terminal base for connecting the electric wire conductor, and a circuit breaker arranged in a manner protruding from one side in the short direction of the base for plug-in connection. The insertion blade is provided with two identically shaped terminal plates formed continuously and integrally via a stepped portion, and each terminal plate has its insertion blades facing each other and the front and back in the thickness direction of the insertion blades are reversed. A connection conversion device, wherein the base is provided with a storage groove which is opened on the other side surface in the short direction direction and in which at least a step portion of the terminal plate is stored. 2. The connection conversion device according to claim 1, wherein a front surface of each of the terminal blocks is formed at a position different in distance from a mounting surface. 3. The connection conversion device according to claim 1, wherein a cover made of an insulating material that covers at least a front surface side and the other side surface of the base is attached to the base. . 4. The connection conversion device according to claim 3, wherein a hooking projection is provided on the other side surface and the front surface of the base, and a hooking hole hooked on the hooking projection is provided in the cover. 5. A hook projection provided on the other side surface of the base has a tip portion extending toward the other side surface, and a hook projection provided on the front surface of the base has a tip portion of the insertion blade. 5. The connection conversion device according to claim 4, wherein the connection conversion device extends in a protruding direction. 6. A main body switch having a box body having a front opening which is entirely surrounded by a side plate, and a handle which is operated up and down, and disposed in the box body with the handle as a front side. A conductive bar that is electrically connected to the load-side terminal of the main switch and is disposed in the box body so as to extend in the left-right direction;
A branch switch comprising a plurality of circuit breakers having a handle operated up and down and arranged in two stages in the box body with the handle as a front side, and a power supply side terminal portion inserted and connected to a conductive bar; The main switch is connected to an electric circuit on the power supply side via a wire conductor with respect to the main switch, and one side of the base is opposite to the main switch in the left-right direction and opposite to the branch switch with respect to the main switch. A connection switching device according to any one of claims 1 to 5, which is disposed in the box body, and has a handle operated up and down, and is opposite to a branch switch with respect to the main switch in the left-right direction. And a primary feed switch comprising two circuit breakers, which are arranged in the upper and lower stages in the box body and connected to the insertion blade from above and below, respectively. .