JP2002291118A - Distribution board for housing - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a distribution board for housing, which facilitates fitting work for a branch switch, and reduces the number of required parts. SOLUTION: A main circuit breaker 31 and a plurality of branch circuit breakers 32 are arranged in a box 10. The box 10 is in the shape having a peripheral wall 12 projecting forwards over the whole periphery of the peripheral brim of a back wall (bottom board) 11 whose outer shape is rectangular. The back wall 11 is fitted to a fitting board 40 for a main to which a main circuit breaker 31 being a main switch, a support member fitting board 50 to which a bar support member 100 which supports conductive bars 110a, 110b, 110c is fitted, and a fitting board 60 for a branch being a branch switch fitting board to which branch circuit breakers 32 being branch switches are fitted, are formed into a continuous united body respectively. The branch circuit breakers 32 have terminal areas 37a-37c being the terminal areas of a power source to be insertion-connected to the conductive bars 110a, 110b, 110c.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a distribution board for a house.

[0002]

2. Description of the Related Art Japanese Patent Laid-Open Publication No.
The thing described in 15211 gazette is known. In the distribution board described in this publication, as shown in FIG. 16 and FIG. 17, a box body having a front opening to a substrate 90 on which a main circuit breaker 31 ′ and a plurality of branch circuit breakers 32 ′ are mounted. It is housed in 10 ', and a cover 20' with a door is connected to the front side of the box 10 '. Here, a conductive bar (not shown) connected to the main circuit breaker 31 'is also attached to the substrate 90, and the branch circuit breaker 32' is connected to one end of the longitudinal direction (vertical direction in FIG. 17). Are connected to the conductive bar using terminal screws (not shown), and the other end is attached to the substrate 90 using fixing screws (not shown). The board 90 is attached to the box 10 ′ using mounting screws 91.

[0003]

However, in the distribution board described in the above publication, the branch circuit breaker 32 ', which is a branch switch, is attached to the substrate 90 using the fixing screw. However, a screw tightening operation for attaching the branch circuit breaker 32 'is required, so that the mounting operation of the branch circuit breaker 32' becomes troublesome, and the number of parts increases.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a residential distribution board which can facilitate the work of installing a branch switch and reduce the number of parts. To provide.

[0005]

According to a first aspect of the present invention, there is provided a main body switch for supporting a main switch and a conductive bar connected to the main switch. And a power supply terminal portion which is inserted and connected to the conductive bar is provided, and a holding groove is formed on one side surface orthogonal to the extending direction of the conductive bar, and is arranged side by side in the extending direction of the conductive bar. A plurality of branch switches are juxtaposed to each other, and a hooking projection is provided on a front surface of the branch switch to engage with a holding groove of the branch switch and regulate movement of the branch switch in a direction away from a back wall. And a branch switch mounting base disposed on the side of the box body, wherein the branch switch mounting base is integrally formed on a back wall of the box body. Since it is integrally formed on the back wall, the branch switch is attached to the board as The number of parts can be reduced as compared with the case where the substrate is mounted on the back wall of the box, and the hooking projection is engaged with the holding groove when the branch switch is plugged into the conductive bar. Can be attached to the branch switch mounting base without using screws, which facilitates the mounting work of the branch switch and furthermore, a force in the thickness direction is applied to the branch switch mounting base integrally formed on the back wall of the box body. Is difficult to add,
The possibility that the branch switch mounting base is damaged can be reduced.

According to a second aspect of the present invention, in the first aspect of the present invention, an electric wire insertion hole is formed in a back wall of the box at a side opposite to a portion where the conductive bar overlaps with the branch switch mounting base. Therefore, the electric wire inserted from the electric wire insertion hole can be easily connected to the branch switch.

According to a third aspect of the present invention, in the second aspect of the present invention, the branch switch mounting base is formed at a position raised above the back wall in front of a portion where the electric wire insertion hole is formed. Therefore, the bending curvature of the electric wire when connecting the electric wire inserted through the electric wire insertion hole to the branch switch can be increased, and the work of connecting the electric wire to the branch switch can be facilitated.

According to a fourth aspect of the present invention, in the second or third aspect of the present invention, the branch switch mounting base is configured to insertly connect the branch switch to the conductive bar and to connect the branch protrusion to the holding groove. Are engaged, the end face on the wire insertion hole side and the end face on the load terminal portion side of the branch switch in the branch switch mounting base are aligned on the same plane, so that the load terminal of the branch switch is Since the end surface of the branch switch can be prevented from protruding to the wire insertion hole side from the branch switch mounting base, the load terminal portion side of the branch switch can be prevented from protruding in front of the wire insertion hole, and The width of the electric wire insertion hole can be sufficiently ensured, and the operation of drawing the electric wire becomes easy.

According to a fifth aspect of the present invention, in the second to fourth aspects of the present invention, a reinforcing rib is formed on a back surface of the branch switch mounting base so as to extend in a direction in which the branch switches are arranged. Therefore, the mechanical strength of the branch switch mount can be improved.

According to a sixth aspect of the present invention, in the fifth aspect of the present invention, the reinforcing rib has a round shape and is formed at an end on the wire insertion hole side on the back surface of the branch switch mounting base. Further, it is possible to prevent the covering of the electric wire connected to the branch switch from being broken by hitting the end of the branch switch mounting base on the side of the electric wire insertion hole.

According to a seventh aspect of the present invention, in accordance with the second to sixth aspects of the present invention, the branch switch mounting base extends in the direction in which the branch switches are juxtaposed and abuts against the back surface of each branch switch. With the iron plate attached to the front side of the switch, the heat generated in the branch switch can be dissipated and the mechanical strength of the branch switch mounting base can be improved.

According to an eighth aspect of the present invention, in accordance with the seventh aspect of the present invention, a mounting groove is formed in the branch switch mounting base so as to run in the direction in which the branch switches are arranged, and the iron plate is provided with a parallel arrangement of the branch switches. Since the reinforcing piece extending in the installation direction and engaging with the mounting groove is provided, in addition to the effect of claim 7, the iron plate is hardly bent, and the mechanical strength of the branch switch mounting base is further increased.

According to a ninth aspect of the present invention, in the invention of the eighth aspect, the reinforcing pieces are provided on both sides in the width direction of the iron plate, and the mounting grooves correspond to the reinforcing pieces in the branch switch mounting base. Since it is formed at each position, in addition to the effect of claim 8, the iron plate is more difficult to bend,
The mechanical strength of the branch switch mount is further increased.

According to a tenth aspect of the present invention, in the invention of the eighth or ninth aspect, a hook portion is provided on one of the mounting groove and the reinforcing piece, and the hooked portion hooked on the hook portion is provided on the other. With this arrangement, it is possible to prevent the iron plate from dropping from the branch switch mounting base when all the branch switches are removed from the branch switch mounting base.

According to an eleventh aspect of the present invention, in the first to tenth aspects of the present invention, a thin portion is formed to connect a side edge of the hooking projection to a front surface of the branch switch mounting base. And the hooking projection is less likely to break.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIGS. 1 to 6, a distribution board for a house according to this embodiment has one main circuit breaker 31. FIG.
And a plurality of branch circuit breakers 32 disposed in the box body 10, wherein the plurality of branch circuit breakers 32 are arranged side by side in a row. The box 10 is a synthetic resin molded product, is formed in a rectangular parallelepiped shape with an open front surface, and a cover 20 of the synthetic resin molded product is coupled to the front surface side.

The box 10 is formed in a shape in which a peripheral wall 12 protrudes forward over the entire periphery of a back wall 11 having a rectangular outer periphery. The back wall 11 has a main mounting base 40 to which a main circuit breaker 31 serving as a main switch is mounted continuously and integrally formed at a left central portion, and a branch switch at a right central portion of the back wall 11. A branch mount 60 to which the branch circuit breaker 32 is mounted is formed continuously and integrally. Further, the back wall 11 is attached to the branch mount 6.
0 above conductive bars 110a, 110b, 110
The supporting member mounting base 50 to which the bar supporting member 100 supporting the member c is mounted is formed continuously and integrally. In addition,
In the present embodiment, the branch mounting base 60 constitutes a branch switch mounting base.

Here, a part of the outer peripheral edge of the main mounting plate 40a having a rectangular outer peripheral shape is connected to the back wall 11 via a step portion 41.
The support member mounting base 50 is connected to the back wall 11 via stepped portions 51 at both side edges in the longitudinal direction (left-right direction) of the support member mounting plate 50a having a rectangular outer peripheral shape.
In the branch mounting base 60, both side edges in the longitudinal direction (left-right direction) of a branch mounting plate 60 a having a rectangular outer peripheral shape are connected to the back wall 11 via step portions 61 respectively. Further, the branch attachment plate 60a is formed at a position where the distance from the surface including the back surface of the back wall 11 is larger than that of the support member attachment plate 50a, and the upper end edge of the branch attachment plate 60a has a stepped portion 62a. Is connected to the lower end edge of the support member mounting plate 50a through the support member.

The back wall 11 has an electric wire insertion hole 13 opened above the main mounting base 40, and a support member mounting base 50.
The wire insertion hole 14 is opened on the upper side of the
An electric wire insertion hole 15 is opened on the lower side. The electric wire insertion holes 13 to 15 are formed in the back wall 11 by the electric wire insertion holes 1.
A cutout knockout portion may be formed in advance at a portion corresponding to each of 3 to 15, and the knockout portion may be cut off as appropriate.

The outer peripheral surface of the rear end of the cover 20 substantially coincides with the outer peripheral surface of the front end of the peripheral wall 12 of the box 10 (see FIGS. 5 and 6). The cover 20 is formed with a window hole 25 for exposing a part of the main circuit breaker 31 and a window hole 26 for exposing a part of each branch circuit breaker 32 at a time.

By the way, the main circuit breaker 31 has a handle 31a on the front side capable of opening and closing a contact portion housed in the body 3, but is provided with the above-mentioned step portion 41. As shown in FIG. 5, the main circuit breaker 31
Since the front surface of the portion exposed in the above and the periphery of the window hole 25 in the cover 20 are aligned on the same plane, and when the contact portion is closed, the handle 31a is at a position not protruding to the front surface side of the cover 20, In addition to providing a good-looking appearance, it is possible to reduce the risk that the handle 31a is operated by mistake when the contact portion of the main circuit breaker 31 is in the closed state. It is possible to prevent a burden on the connected load. The branch circuit breaker 32 is provided with a handle 32a on the front side capable of opening and closing a contact portion housed in the body, but as shown in FIG. The front surface of the portion exposed in the branch circuit breaker 32 and the periphery of the window hole 26 in the cover 20 are aligned on the same plane, and the handle 32a projects toward the front surface of the cover 20 when the contact portion is closed. The position of the branch circuit breaker can provide a good-looking appearance, and can reduce the risk of the handle 32a being erroneously operated when the contact portion of the branch circuit breaker 32 is closed. It is possible to prevent a load from being applied to the load connected to the circuit breaker 32.

The window hole 26 in the front of the cover 20
On both sides in the direction orthogonal to the juxtaposition direction of the branch circuit breakers 32 (that is, above and below the window 26), a load (used load) connected to the branch circuit breaker 32 is distinguished. A sticker 24 (see FIGS. 1 and 2) provided with an indication to be displayed is attached.

The body 3 of the main circuit breaker 31 is made of a synthetic resin and is formed in a rectangular parallelepiped shape.
Are provided, and three power-supply-side terminal pieces 33, 33, 33 are arranged in the left-right direction on the front side of the terminal block 4 as power-supply-side terminals. Here, a terminal hole 33a into which a terminal screw (not shown) is inserted is formed in each power supply side terminal piece 33. Further, the terminal mounting portion 5 continuously and integrally protrudes upward from the upper right end of the housing 3, and three load-side terminal pieces 34 a, 34 b, and 34 c serve as load-side terminals from the right side of the terminal mounting portion 5. It is arranged so as to protrude in a direction perpendicular to the right side surface. Here, the load-side terminal pieces 34a, 34b,
Terminal holes (not shown) through which terminal screws 35, 36, 36 are inserted are formed in 34c. in short,
The body 3 of the main circuit breaker 31 has three power supply-side terminal pieces 33, 33, 33 and three load-side terminal pieces 34a, 34.
b, 34c are exposed. Power supply side terminal pieces 33, 3
3, 33 and the load-side terminal pieces 34a, 34b, 34c
The power supply side terminal strips 33, 33,
A power supply line (not shown) introduced into the box 10 through the electric wire insertion hole 13 is connected to the terminal 33 by using the above-mentioned terminal screw, and the load-side terminal strips 34a, 34b, and 34c are connected to the power supply terminal as shown in FIG. Conductive bars 110a, 110b, 110 respectively
c is directly connected using the terminal screws 35, 36, 36. The main circuit breaker 31 is attached to the main mount 40 using the mounting screws 30, and the right side surface of the body 3 is a conductive bar 110 a, 1 supported by the bar support member 100.
It is orthogonal to the longitudinal direction of 10b, 110c. Further, since the main mounting plate 40a of the main mounting base 40 is formed with the opening window 42 at the center, the heat generated in the main circuit breaker 31 can be radiated.

Each of the load-side terminal pieces 34b, 34a, 3
4c are arranged side by side in the vertical direction when viewed from the front, and the load-side terminal strip 34a at the center in the vertical direction is
5 are electrically and mechanically connected to the conductive bar 110a of the neutral electrode, and the upper and lower load terminals 34b, 34c are connected to the conductive bar 1 of the voltage electrode by using the terminal screws 36, 36, respectively.
10b and 110c are electrically and mechanically connected. It should be noted that the positional relationship between the load-side terminal pieces 34a, 34b, 34c in the up-down direction and the front-back direction and the conductive bars 110a,
The positional relationship between the vertical direction and the longitudinal direction of 10b and 110c is set to correspond one-to-one.

The bar support member 100 is placed on the front side of the support member mounting base 50. The left-right width of the bar support member 100 is formed slightly smaller than the left-right width of the support member mounting base 50, and the vertical width of the bar support member 100 is slightly larger than the vertical width of the support member mounting plate 50a. Is formed.

As shown in FIG. 8, the bar supporting member 100 has a left-right partition wall 101 protruding forward at the center in the up-down direction. Supporting posts 102 and 103 are formed. Recesses 102a and 103a are formed on the front surfaces of the support posts 102 and 103, and a nut (not shown) is held at the bottom of the recess 102a. Bar support member 1
The partition wall 101a is formed integrally with the partition wall 101, and the partition wall 101 is divided into eight sections.

The bar support member 100 has a mounting piece 10 on the top and bottom.
A recess 104a is formed at one end where the support post 102 is provided in the left and right direction of each mounting piece 104, and a recess 104a which is recessed rearward is formed at the bottom of each recess 104a. Is held.

An engaging portion 105 is provided at an intermediate portion of each mounting piece 104.
Is erected in front. On the upper and lower edges of the bar support member 100, that is, on one end of each of the mounting pieces 104, an upright wall 106 erected from the mounting piece 104 is formed. Here, the standing wall 106 erected from the upper edge of the bar support member 100 is so formed that the protrusion dimension from the mounting piece 104 is larger on the upper side than on the lower side as shown in FIGS. The front end surface (front end surface) is inclined, and two locking grooves 106b running in the left-right direction are formed on the front end surface. The locking groove 106b is partitioned by a partition wall 106c formed at an intermediate portion of the standing wall 106 in the left-right direction. The locking groove 106b will be described later. Further, hook claws 101b projecting toward the opposing standing wall 106 are formed on every other four separation walls 101a. Also,
A hook 106a (see FIGS. 8 and 13) protruding toward the partition wall 101 is formed at two places on the standing wall 106.

The bar supporting member 100 is a neutral conductive bar 1.
The configuration is such that three conductive bars 110a to 110c of 10a and conductive bars 110b and 110c of two voltage poles can be simultaneously held.

The neutral conductive bar 110a is installed between the two support posts 102 and 103. Conductive bar 110
In a, insertion holes 111 are formed at equal pitches in the longitudinal direction. A terminal strip 112 extends from one end of the conductive bar 110a in the longitudinal direction (the left end in FIG. 3).
14 and locking portion 1 protruding from the front surface of support post 102
A positioning hole 117 into which the second 02b is inserted is formed. A fixing screw 120 (see FIG. 11) is provided on the locking portion 102b.
Are formed. Also, conductive bar 1
At the other end of 10a, a mounting piece 113 that fits into the recess 103 of the support post 103 extends. Therefore, the conductive bar 110a is formed by screwing the fixing screw 120 into the screw hole of the locking portion 102b with the mounting piece 113 fitted into the recess 103 and the locking portion 102b inserted through the positioning hole 117. The conductive post 110a is the support post 1
02 is fixed. In addition, the terminal screw 35 described above is
02a is screwed into a nut provided at the bottom.

On the other hand, the two conductive bars 110b,
110c are mounted on the front surface of the mounting piece 104 so as to overlap each other. An insertion hole 115 is formed in the conductive bar 110b, 110c at an intermediate portion in the longitudinal direction.
Terminal holes 116 are formed at one longitudinal end (left end in FIG. 3) of 110c. Terminal hole 11
The terminal screw 36 described above is inserted into 6, and the terminal screw 36 is screwed into a nut held at the bottom of the recess 104 a provided on the mounting piece 104. A binding member 130 described later is attached to the front side of the conductive bar 110a. The binding member 130 has a dimension slightly longer than the width dimension of the eight branch circuit breakers 32. The binding member 130 is a conductive bar 1
A press-fit projection 132 (see FIG. 7) is inserted into the insertion hole 111 of every other press-fitting hole 111, and an engaging leg 135 (see FIG. 7) projecting rearward from the rear surface of the upper end portion is provided.
A hook 35a (see FIG. 7), which is locked to the rear surface side of the conductive bar 110a, is formed at the distal end of 35. Therefore, the binding member 130 is fixed to the conductive bar 110a by the press-fitting projection 132 being pressed into the insertion hole 111 and the hook 135a being locked to the rear surface of the conductive bar 110a.

Further, a connecting piece 118 is provided to protrude forward from one side edge of the conductive bars 110b and 110c in the short direction. Two connecting terminal pieces 118a and 118b extend from the connecting piece 118 of the conductive bar 110c, and insert terminal pieces 118a and 118b extend alternately from the connecting piece 118 of the conductive bar 110b. ing. Each of the insertion terminal strips 118a and 118b is connected to the conductive bar 1
It extends in the direction orthogonal to the connection piece 118 so as to face 10c. The distance from the conductive bar 110c to the insertion terminal strip 118b is larger than the distance from the insertion terminal strip 118a. Therefore, the insertion terminal piece 1
18b and 118a will be located back and forth. Further, in a state where the conductive bars 110b and 110c are attached to the respective mounting pieces 104, the other conductive bars 110b and 110c are connected to each other.
The insertion terminal pieces 118b and 118a provided in 10c are located in front and rear, and the positions of the tip edges of both insertion terminal pieces 118b and 118a are aligned so as to be aligned vertically and horizontally. With such an arrangement, the two insertion terminal strips 118 arranged in front and rear are
b and 118a are mutually different conductive bars 110b and 110c.
Connected. Here, the support post 10
The position in the vertical direction of the short-side end of the conductive bar 110a of the neutral pole provided between the two terminals 103 also coincides with the front end of the insertion terminal pieces 118b, 118a. The connecting pieces 118 provided on the different conductive bars 110b and 110c are insulated by the partition wall 101.

By the way, in the insertion holes 115 provided in the conductive bars 110b and 110c, the locking portions 1 provided in the mounting piece 104 are provided.
05 is inserted. Also, the conductive bars 110b, 110c
A notch 119 having a shape matching the corner of the support post 102 is formed at one end (left end) in the longitudinal direction.
Therefore, the locking portion 105 is inserted into the insertion hole 115,
The engagement between the notch 119 and the support post 102 causes the conductive bars 110b and 110c to be positioned in the left-right direction with respect to the bar support member 100.
One ends of the conductive bars 110b and 110c in the short direction are connected to hooks 101b provided on the separation wall 101a and the mounting pieces 10b.
4 and the other end is held between a hook 106a provided on the standing wall 106 and the mounting piece 104. Therefore, the conductive bars 110b and 110c are connected to the bar support member 1.
00, the ends of the conductive bars 110b and 110c are inserted between the hook 106a and the mounting piece 104,
With the insertion hole 115 aligned with the locking portion 105,
When the conductive bars 110b and 110c are pressed against the mounting piece 104, the standing wall 106 bends and the conductive bars 110b and 110c are bent.
c is over the hooking claw 101b and the hooking claw 101
b and the mounting bar 104 between the conductive bars 110b and 110c.
Is held at the other end. Therefore, the hooking claw 101b is formed such that the protrusion dimension from the separation wall 101a increases toward the rear, and the portion that comes into contact when the conductive bars 110b and 110c are attached is an inclined surface.

A groove 136 (see FIG. 7) for holding one end in the width direction (transverse direction) of the rectangular plate-shaped protective cover 141 made of an insulating elastic material is provided on the rear side of the upper end of the binding member 130. ) Are formed in the left-right direction, and the other end of the protective cover 141 is held by locking grooves 106b, 106b formed on the end surface of the standing wall 106 erected on the mounting piece 104 described above. That is, the protective cover 141 is provided so as to cover the conductive bar 110b of the voltage electrode. In addition,
At the other end of the protective cover 141, a cutout 141a is formed at a position corresponding to the partition wall 106c of the standing wall 106.

As shown in FIG. 7, the upper end surface of the binding member 130 is formed with an inclined surface 130a in which the width of the binding member 130 in the vertical direction becomes larger toward the back wall 11, and the inner peripheral surface of the groove 136 is formed. Is a guide surface 136a along the upper surface of the engagement leg 135 and a contact surface 136b substantially parallel to the inclined surface 130a.
Are connected at the bottom of the groove 136.

Therefore, in order to mount the protective cover 141 on the bar support member 100, the other end of the protective cover 141 is inserted into the locking groove 106b, and the one end is brought into contact with the inclined surface 130a. When the one end side of the protective cover 141 is pressed, the protective cover 141 bends over the inclined surface 130a, and the upper surface of the engaging leg 135 and the guide surface 136a are locked so that the one end is locked in the groove 136.
And finally the upper surface of the one end portion comes into contact with the contact surface 136b.
Can be attached to the bar support member 100 relatively easily.

The load-side terminal strips 34a, 34b, 34c of the main circuit breaker 31 and the conductive bars 110a, 110
A protective cover 142 (see FIG. 4) made of an insulating material is mounted in front of a portion overlapping with b and 110c. At one end in the longitudinal direction of the binding member 130, a mounting claw 121 for attaching the protective cover 142 is protruded.

As shown in FIG. 10, a portion protruding from the rear surface of the mounting piece 104 and a portion protruding outward from the front end of the mounting portion 104 are formed on the rear surface of the bar support member 100 at the right end. L-shaped locking projections 107 are formed vertically. On the other hand, at the right end of the support member mounting plate 50, holding holes 52 in which the locking projections 107 are hooked are formed vertically. On the upper and lower surfaces of the left end portion of the bar support member 100, hooked pieces 108, 108 are respectively protruded, and the hooked pieces 108, 108 are located near the left end of the support member mounting base 50 in the back wall. 11 is hooked and locked to a holding projection 16 which is continuously and integrally provided. The holding projection 16
A guide wall 16a having an L-shaped cross section, and a guide wall 1
6a and a receiving piece 16b formed continuously and integrally with the front end face.

Therefore, when the bar support member 100 is mounted on the support member mounting base 50, the locking projection 107 is inserted from the front into the holding hole 52 of the support member mounting base 50, as shown in FIGS. From the state shown in (a), the bar support member 100 is attached to the support member mounting plate 50.
A along the front of a (that is, along the front of the back wall 11)
By sliding in the rightward direction in FIG. 11, the locking projection 107 is overlapped with the periphery of the holding hole 52 and hooked, as shown in FIGS. 13, 14, and 15 (b). The bar support member 100 is held by the support member mounting base 50 by hooking the piece 108 so as to overlap the receiving piece 16b of the holding projection 16. In short, the bar support member 100 is attached to the box 10 by sliding the bar support member 100 rightward in a plane parallel to the back wall 11 of the box 10. If the bar projection 100 does not overlap the periphery of the holding hole 52 and the bar support 100 slides to a position where the hooked piece 108 does not overlap the receiving piece 16b, the bar support 100 is attached to the support member. It can be removed from the base 50.

A retaining groove 108a is formed on the front surface of the hook 108 provided on the bar support member 100 along a direction perpendicular to the sliding direction of the bar support member 100. When the bar support member 100 is slid to a fixed position at the time of attachment when the bar supporting member 100 is slid to the fixed position at the time of attachment, the hooked piece 108 comes off from the holding projection 16 on the rear surface of the receiving piece 16 b of the holding projection 16 protruding from A protrusion 17 is provided to prevent this. Therefore, when the bar support member 100 is slid to the home position, the retaining groove 108a formed on the hooked piece 108 and the retaining projection 17 formed on the holding projection 16 engage with each other, and Since it is possible to prevent the bar support member 100 from coming off, the possibility that the bar support member 100 comes off the box body 10 is reduced.

According to the present embodiment, the bar support member 100 is attached to the box 10 by sliding the bar support member 100 in a predetermined direction (rightward) along the front surface of the back wall 11 of the box 10. Can be. The locking projection 107 and the hooked piece 108 are provided so as to be visible when the bar support member 100 is viewed from the front of the back wall 11 when the bar support member 100 is not hooked on the holding hole 52 and the holding projection 16, respectively. So that the box 1
The work of attaching the bar support member 100 to the support member 100 becomes easy.

As shown in FIG. 10, guide projections 109 projecting rearward are provided on the rear surfaces of both ends in the longitudinal direction of the bar support member 100, and the guide projections 109 are mounted on the support member mounting plate 50a. Since the elongated hole 53 for guiding the member 100 along the sliding direction is provided, the work of attaching the bar support member 100 to the box body 10 becomes easy.

Here, the elongated hole 53 is provided with the locking projection 10.
7 and the hooked piece 108 are the holding hole 52 and the holding projection 1
6 are not caught on the guide projections 1 respectively.
A groove 53b for guiding the guide projection 109 along the sliding direction in a part of the large-diameter portion 53a having a round hole into which the reference numeral 09 is loosely inserted.
Are formed in a continuous keyhole shape. Therefore, when attaching the bar support member 100 to the box body 10, the bar support member 100 is attached to the front side of the support member mounting base 50 such that the guide projection 109 is loosely inserted into the large diameter portion 53 a of the long hole 53. The bar support member 100 can be attached to the box body 10 by sliding the bar support member 100 in the sliding direction at the time of mounting so that the guide projection 109 enters a portion corresponding to the groove 53b. , Bar support member 1
The positioning of the bar support member 100 when the bar support member 100 is placed on the support member mounting base 50 before the 00 is slid is facilitated, and the work of attaching the bar support member 100 to the box body 10 is facilitated. The guide projection 109 has a columnar shape, and the vertical width of the groove 53b of the elongated hole 53 is set to be substantially equal to the diameter of the guide projection 109, so that the groove 53b is in contact with the inner peripheral surface of the groove 53b. The outer peripheral surface of the guide projection 109 contacts (see FIG. 14).

The conductive bars 110a to 110c are provided for connecting the branch circuit breakers 32. In the present embodiment, eight branch circuit breakers 32 are arranged in one horizontal row. In this embodiment, the above-mentioned branch mounting base 60 is provided to mount the branch circuit breaker 32. As shown in FIGS. 1, 7 and 9, an iron plate 70, which will be described later, is mounted on the lower front side of the branch mount 60.
0 allows heat from the branch circuit breaker 32 to be radiated. Two reinforcing ribs 63, 63 running in the left-right direction are provided on the rear (rear) side of the lower portion of the branch attachment plate 60a so as to project in the vertical direction. Each reinforcing rib 63 has a center in the up-down direction more than the both ends and a branch mounting plate 60a.
Is formed so that the protrusion dimension from the rear surface gradually increases, and is rounded. By providing the reinforcing rib 63, the branch mounting base 60 can enhance the mechanical strength.

On the front side of the branch mounting plate 60a,
Mounting grooves 64 running in the left-right direction are formed at portions corresponding to the reinforcing ribs 63, respectively. Further, a holding projection 66 (see FIG. 9) is protruded from an inner surface of the upper mounting groove 64. The function of the holding projection 66 will be described later. Iron plate 7
As shown in FIG. 9, 0 is open rearward and is formed in a U-shaped cross section, and rectangular insertion holes 72 are formed at an equal pitch in the longitudinal direction. The iron plate 70 has a locking hole 73 for locking the above-mentioned holding projection 66 formed at a position corresponding to the above-mentioned holding projection 66 on the upper leg 71, and protrudes from the lower front surface of the branch attachment plate 60 a. When the breaker holding projection 65 as a hooking projection provided is inserted into the insertion hole 72 and the two leg pieces 71, 71 are inserted into the mounting grooves 64, 64 formed on the front side of the lower part of the branch mounting base 60, the above-described holding is performed. Protrusion 6
6 is mounted on the front side of the branch mounting plate 60a by being inserted and locked in the holding hole 73. Therefore, the iron plate 7
0 can be prevented from dropping from the branch mount 60. Here, in the present embodiment, both leg pieces 7 of the iron plate 70 are used.
1 and 71 constitute reinforcing pieces, respectively, and the two leg pieces 7
By providing the first and the first 71, the bending of the iron plate 70 can be prevented, and the mechanical strength of the branch mount 60 can be increased.

Incidentally, seven insertion holes 72 are formed in the iron plate 70, and a cutout 74 is formed in a portion corresponding to the circuit breaker holding protrusion 65 on the leftmost side of the branch mounting plate 60a.

On the front surface of one end (lower end) of the branch mounting plate 60a, there are provided eight inverted L-shaped circuit breaker holding protrusions 65 projecting forward and extending forward. Is formed. Circuit breaker support pieces 66 are formed at the same pitch in the horizontal direction on the front surface of the other end (upper end) of the branch mounting plate 60a, and a circuit breaker support piece 67 is formed on the front surface of the central part of the branch mounting plate 60a. They are formed at equal pitches in the left-right direction. Here, nine breaker support pieces 66 and 67 are formed respectively. The side edge of the circuit breaker holding protrusion 65 is connected to the front surface of the branch mounting plate 60a by a thin wall portion 65a. In addition, the thickness of the thin portion 65a is formed to be substantially the same as the thickness of the circuit breaker support pieces 66 and 67.

Up to eight branch circuit breakers 32 can be mounted on the front side of the branch mount 60. The branch circuit breaker 32 includes three slit-shaped terminal portions 37a on the power supply side.
To 37c are provided. Among the terminal portions 37a to 37c, a neutral conductive bar 110a is inserted into the terminal portion 37a,
The terminal portions 37b and 37c have conductive bars 110b for voltage electrodes,
Insertion terminal strips 118b and 118a of 110c are inserted. However, each branch circuit breaker 32 is electrically connected to only two of the conductive bars 110a, 110b, 110c, respectively, and the other one is treated as a dummy. For example, the conductive bar 110a is electrically connected to the terminal part 37a, and the insertion terminal piece 118a is electrically connected to the terminal part 37c. However, the insertion terminal piece 118b is electrically connected only by being inserted into the terminal part 37b. No connection is made. Here, in the present embodiment, the terminal portions 37a to 37c are connected to the conductive bars 110a.
To 110c, and two of the terminal portions 37a to 37c are connected to the conductive bars 11a to 11c.
A receiving blade (not shown) made of a conductive material to which the plugs 0a to 110c are inserted and connected is provided. In short, the branch circuit breaker 32 in the present embodiment slides the body to insert and connect the receiving blade to the conductive bars 110a to 110c, and the connection method on the power supply side does not use the terminal screw. (So-called plug-in system).

The branch circuit breaker 32 is provided with an electric wire insertion port (not shown) on the load side, and the terminal board accommodated in the housing is simply inserted into the housing through the electric wire insertion port. An electric wire is connected to a load terminal portion including a well-known quick-connecting terminal constituted by a not-shown and a locking spring (not shown).

On one side surface (left side surface) of the body of the branch circuit breaker 32, a holding groove 38 for engaging with a breaker holding protrusion 65 provided on the branch mounting base 60 is opened. Here, the holding groove 38 inserts the branch circuit breaker 32 in the insertion direction (FIG. 6).
(Upward in the figure), the breaker holding protrusion 65 is engaged. Further, two bundling projections 39 are protrudingly provided on the front surface of the branch circuit breaker 32 at the end near the partition wall 101.

When the branch circuit breaker 32 is mounted on the branch mount 60, the conductive bar 110a is inserted into the terminal portion 37a, and the insertion terminal pieces 118a and 118b are not inserted into the terminal portions 37b and 37c. The circuit breaker holding projection 65 is inserted into the holding groove 38 of the branch circuit breaker 32 while the branch circuit breaker 32 is shifted in the width direction of the insertion terminal pieces 118b and 118a.
When the branch circuit breaker 32 is slid so that the circuit breakers 8b and 118a are inserted into the terminal portions 37b and 37c, the holding groove 3 is formed between the front surface of the branch mount 60 and the circuit breaker holding protrusion 65.
8 is pinched. At this time, the breaker support pieces 66 and 67 and the thin portion 65a are connected to the branch circuit breaker 3.
The position of the branch circuit breaker 32 in the left-right direction is prevented by contacting the side surface of the second circuit breaker 32. The support member mounting plate 50a
Are provided with two opening windows 54, and the conductive bars 11
The heat from 0a, 110b, and 110c can be radiated.

The above-described binding member 130 has a binding piece 133 extended to a portion overlapping the front surface of each branch circuit breaker 32.
Are formed, and the notch groove 13 provided at the tip of the binding piece 133 is formed.
The branch circuit breaker 32 is connected to the bundling pieces 133 by engaging the binding projections 39 projecting from the front surface of the branch circuit breaker 32. By providing this binding member 130, each branch circuit breaker 32
Are connected via the binding member 130. Although not described in detail, the binding piece 1 of the binding member 130 is not described in detail.
Reference numeral 33 denotes a configuration in which the engagement state between the cutout groove 134 and the binding projection 39 can be released for each branch circuit breaker 32.

In this embodiment, however, the branch mounting base 60, which is the branch switch mounting base, is formed integrally with the back wall 11 of the box 10, so that the conventional configuration shown in FIGS. The number of components can be reduced as compared with the case where the branch circuit breaker 32 'is attached to the substrate 90 and the substrate 90 is further attached to the box 10'. Moreover, when the branch circuit breaker 32 is plugged into the conductive bars 110a to 110c, the breaker holding projection 65 is engaged with the holding groove 38, so that the branch circuit breaker 32 can be mounted without using screws. The attachment to the branch circuit breaker 32 is facilitated because it can be attached to the branch circuit breaker 32. Further, since a force in the thickness direction is hardly applied to the branch mounting base 60 formed integrally with the back wall 11 of the box body 10, the risk of the branch mounting base 60 being damaged can be reduced.

The wire insertion hole 15 formed on the back wall 11 of the box 10 below the branch mounting base 60 is located on the opposite side of the branch mounting base 60 from the portion where the conductive bars 110a to 110c overlap. So that the wire insertion hole 1
5 can easily be connected to the branch circuit breaker 32. In addition, since the branch mounting base 60 is formed at a position on the back wall 11 of the box body 10 which is raised forward from a portion where the electric wire insertion hole 15 is formed, the electric wire inserted from the electric wire insertion hole 15 can be removed. The bending curvature of the electric wire when connecting to the branch circuit breaker 32 can be increased, and the work of connecting the electric wire to the branch circuit breaker 32 becomes easy. The branch mount 60 is attached to the branch circuit breaker 32 by inserting the branch circuit breaker 32 into the conductive bars 110a to 110c and engaging the breaker holding protrusion 65 with the holding groove 38. Wire insertion hole 15 in plate 60a
End surface 60b (see FIG. 7) and end surface 32b (see FIG. 7) of branch circuit breaker 32 on the load terminal side are aligned on the same plane, so that end surface of branch circuit breaker 32 on the load terminal side. 3
2b can be prevented from protruding to the wire insertion hole 15 side from the branch mounting base 60, so that the load terminal side of the branch circuit breaker 32 can be prevented from protruding forward of the wire insertion hole 15, and the wire insertion hole can be prevented. 15 can be secured enough,
Wire routing work becomes easy.

[0055]

According to the first aspect of the present invention, there is provided a main switch disposed in a box, a bar supporting member for supporting a conductive bar connected to the main switch and disposed in the box, and a conductive bar. A plurality of branching switches provided with a power supply terminal portion that is inserted and connected to, and a holding groove is formed on one side surface orthogonal to the extending direction of the conductive bar and arranged side by side in the extending direction of the conductive bar,
A branch switch mounting base in which a hooking projection that protrudes from the front side and controls the movement of the branch switch in the direction away from the back wall by engaging with the holding groove of the branch switch and protruding from the front side, and And the branch switch mounting base is formed integrally with the back wall of the box body. Since the branch switch mounting base is formed integrally with the back wall of the box body, the branch switch The number of components can be reduced as compared with the case where the board is attached to the board and the board is further attached to the back wall of the box, and the hooking projection is formed in the holding groove when the branch switch is inserted and connected to the conductive bar. By engaging, the branch switch can be attached to the branch switch mounting base without using screws, which has the effect of facilitating the work of mounting the branch switch, and is integrally formed on the back wall of the box body. It is difficult to apply a force in the thickness direction to the branch switch mounting base It can be instrumental mount to reduce the possibility of damage.

According to a second aspect of the present invention, in the first aspect of the present invention, an electric wire insertion hole is formed in a back wall of the box on a side opposite to a portion where the conductive bar overlaps with the branch switch mounting base. Therefore, there is an effect that the electric wire inserted through the electric wire insertion hole can be easily connected to the branch switch.

According to a third aspect of the present invention, in the second aspect of the invention, the branch switch mounting base is formed at a position on the back wall which is raised to the front of a portion where the wire insertion hole is formed. Therefore, it is possible to increase the bending curvature of the electric wire when connecting the electric wire inserted through the electric wire insertion hole to the branch switch, and there is an effect that the operation of connecting the electric wire to the branch switch becomes easy.

According to a fourth aspect of the present invention, in the second or third aspect of the present invention, the branch switch mounting base is configured to connect the branch switch to the conductive bar and connect the branch switch to the conductive groove, and the hooking projection is formed in the holding groove. Are engaged, the end face on the wire insertion hole side and the end face on the load terminal portion side of the branch switch in the branch switch mounting base are aligned on the same plane, so that the load terminal of the branch switch is Since the end surface of the branch switch can be prevented from protruding to the wire insertion hole side from the branch switch mounting base, the load terminal portion side of the branch switch can be prevented from protruding in front of the wire insertion hole, and There is an effect that the width of the electric wire insertion hole can be sufficiently ensured, and the operation of drawing the electric wire becomes easy.

According to a fifth aspect of the present invention, in the second to fourth aspects of the present invention, a reinforcing rib is formed on a rear surface of the branch switch mounting base so as to extend in a direction in which the branch switches are arranged. Therefore, there is an effect that the mechanical strength of the branch switch mounting base can be improved.

According to a sixth aspect of the present invention, in the fifth aspect of the present invention, the reinforcing rib has a rounded shape and is formed at an end on the wire insertion hole side on a back surface of the branch switch mounting base. In addition, there is an effect that it is possible to prevent the covering of the electric wire connected to the branch switch from being broken by hitting the end of the branch switch mounting base on the side of the electric wire insertion hole.

According to a seventh aspect of the present invention, in accordance with the second to sixth aspects of the present invention, the branch switch mounting base is extended in the direction in which the branch switches are juxtaposed and abuts against the back of each branch switch. Since the iron plate is provided on the front side of the device, the heat generated in the branch switch can be dissipated and the mechanical strength of the branch switch mounting base can be improved.

According to an eighth aspect of the present invention, in the invention of the seventh aspect, a mounting groove running in a direction in which the branch switches are juxtaposed is formed in the branch switch mounting base, and a parallel arrangement of the branch switches is formed in the iron plate. Since the reinforcing piece extending in the installation direction and engaging with the mounting groove is provided, in addition to the effect of claim 7, the iron plate is less likely to bend, and the mechanical strength of the branch switch mounting base is further increased. There is.

According to a ninth aspect of the present invention, in the invention of the eighth aspect, the reinforcing pieces are provided on both sides in the width direction of the iron plate, and the mounting grooves correspond to the reinforcing pieces on the branch switch mounting base. Since it is formed at each position, in addition to the effect of claim 8, the iron plate is more difficult to bend,
There is an effect that the mechanical strength of the branch switch mounting is further increased.

According to a tenth aspect of the present invention, in the invention of the eighth or ninth aspect, a hook portion is provided on one of the mounting groove and the reinforcing piece, and the hooked portion hooked on the hook portion is provided on the other. With this arrangement, there is an effect that the iron plate can be prevented from dropping from the branch switch mounting base when all the branch switches are removed from the branch switch mounting base.

According to an eleventh aspect of the present invention, in the first to tenth aspects of the present invention, a thin portion connecting the side edge of the hooking projection and the front surface of the branch switch mounting base is formed. Has the effect that the hooking projection is less likely to break.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a main part according to an embodiment of the present invention.

FIG. 2 is an external perspective view of the same.

FIG. 3 is a front view showing a state where a cover and the like are removed from the above.

FIG. 4 is a front view showing a state where a cover is removed in the first embodiment.

FIG. 5 is a sectional view of the same.

FIG. 6 is a sectional view of the same.

FIG. 7 is a sectional view of a main part of the above.

FIG. 8 is an exploded perspective view of an essential part of the embodiment.

FIG. 9 is an exploded perspective view of a main part of the above.

FIG. 10 is an exploded perspective view of a main part of the above.

FIG. 11 is a front view of a main part of the above-mentioned bar before attachment of the bar support member.

FIG. 12 is a rear view of a main part of the above-mentioned bar before attachment of the bar support member.

FIG. 13 is a front view of the main part after the bar support member is attached in the same.

FIG. 14 is a rear view of a main part after the bar support member is attached in the same.

FIG. 15 is an explanatory diagram of how to attach the bar support member in the above.

FIG. 16 is an exploded perspective view showing a conventional example.

FIG. 17 is a front view of the same as above with a cover removed.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Box body 11 Back wall 12 Perimeter wall 31 Main circuit breaker 32 Branch circuit breaker 37a-37c Terminal part 40 Main trunk mount 50 Support member mount 60 Branch mount 100 Bar support member 110a Conductive bar 110b Conductive bar 110c Conductive bar

 ────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hiroaki Yamaguchi 737-12, Anata-cho, Seto-shi, Aichi Fari-term in Owari Matsushita Electric Works Co., Ltd. 5G016 AA03 CD02 DA26

Claims (11)

[Claims] 1. A main switch provided in a box body, a bar supporting member for supporting a conductive bar connected to the main switch and provided in the box body, and a power supply inserted and connected to the conductive bar A plurality of branch switches provided with terminal portions and having a holding groove formed on one side surface orthogonal to the extending direction of the conductive bar and arranged side by side in the extending direction of the conductive bar, and a holding groove of the branch switch. A branching switch mounting base on which a hooking projection that protrudes on the front side and regulates the movement of the branching switch in a direction away from the back wall by engagement is provided on the front side, and the branching switch is disposed on the front side; A power distribution board for a house, wherein a stand is formed integrally with a back wall of a box. 2. An electric wire insertion hole is formed in a back wall of the box body on a side opposite to a portion where the conductive bar overlaps with the branch switch mounting base. Distribution board for residential use. 3. The branch switch mounting base is formed on the back wall at a position raised above the portion where the electric wire insertion hole is formed.
The described distribution board for the house. 4. The branch switch mounting base, wherein the branch switch is inserted and connected to the conductive bar, and the hooking projection is engaged with the holding groove. The distribution board for a house according to claim 2 or 3, wherein an end face on the side of the electric wire insertion hole and an end face on the load terminal portion side of the branch switch are arranged on the same plane. 5. The branch switch according to claim 2, wherein a reinforcing rib extending in a direction in which the branch switches are arranged is formed on a rear surface of the branch switch mounting base. The described distribution board for the house. 6. The housing part according to claim 5, wherein the reinforcing rib has a rounded shape and is formed at an end on the electric wire insertion hole side on a back surface of the branch switch mounting base. Electric board. 7. An iron plate extending in a direction in which the branch switches are juxtaposed and attached to a front side of the branch switch mounting base so as to abut against a back surface of each branch switch. The residential distribution board according to any one of claims 2 to 6. 8. A mounting groove that runs in the direction in which the branch switches are arranged in the branch switch mounting base, and extends into the iron plate in the direction in which the branch switches are arranged to engage with the mounting groove. The distribution board for a house according to claim 7, wherein a reinforcing piece is provided. 9. The reinforcing plate is provided on both sides in the width direction of the iron plate, and the mounting groove is formed at a position corresponding to each reinforcing plate on the branch switch mounting base. 8. The distribution board for a house according to 8. 10. The hook according to claim 8, wherein a hook portion is provided on one of the mounting groove and the reinforcing piece, and a hooked portion hooked on the hook portion is provided on the other. Distribution board for housing. 11. A housing part according to claim 1, wherein a thin portion connecting the side edge of said hooking projection and the front surface of said branch switch mounting base is formed. Electric board.