JP3046797B2 - Mounting structure of plug-in breaker - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improved mounting structure of a plug-in breaker having plug terminal fittings connectable to a plurality of bus bars arranged in a vertical direction.

[0002]

2. Description of the Related Art In a distribution board, an introduced strip-shaped bus bar is connected to a breaker by connecting the bus bar directly to a plug terminal fitting provided on the breaker. An breaker may be used. In this case, the bus bars are usually three bars arranged in the vertical direction corresponding to the power phase.
In order to fit the bus bar corresponding to each plug terminal fitting of the plug-in breaker, it is necessary to push the bus bar in the horizontal direction while facing the three bus bars.

However, conventionally, when a collective one-touch fitting is used as a jig for fixing the plug-in breaker, the plug-in breaker is pushed into the bus bar from an obliquely upper side, so that the bus bar and each of the bus bars are pressed. In addition to connecting the plug terminal fitting and hooking the lower part of the plug-in breaker with the hook at the tip, the mounting operation was performed so that the plug-in breaker itself was fixed with the one-touch fitting. Also, when removing the plug-in breaker from the bus bar, the procedure is such that the one-touch fitting is removed, and then the plug-in breaker is pulled out obliquely to the front, which involves a twisting operation in the mounting operation.

[0004]

As described above,
In a conventional plug-in breaker attaching / detaching operation, the plug terminal fitting of the plug-in breaker is forcibly pushed in or pulled out obliquely with respect to the bus bar. In some cases, the electrode itself may be abnormally deformed, which may cause poor contact. SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problem, and has a plug-in breaker mounting structure capable of mounting and dismounting a plug terminal fitting from a direction directly facing a bus bar. I will provide a.

[0005]

A plug-in breaker mounting structure according to the present invention, which has been made to solve the above-mentioned problem, has a plug terminal fitting connectable to a plurality of bus bars arranged vertically. In the mounting structure of the plug-in breaker, the plug-in breaker is mounted on the bus bar so as to be able to move forward and backward along the mounting bracket surface so that the plug terminal fitting and the bus bar can be separated from each other. provided with a by moving the holder Rutotomoni, the plug
Move the breaker forward to connect the plug terminal
Plug-in breaker installed when connecting to the wire bar
The fixing protrusion on the side of the moving holder for fixing the mosquito
It comes into contact with the rising surface of the mounting bracket to be in a pressed state .

[0006]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a moving holder according to a first embodiment of the present invention; According to the present invention, first, a plug provided with a plug terminal fitting 21 connectable to a plurality of bus bars 11 (three bus bars are shown in the figure) arranged in a vertical direction in a distribution board or the like. It relates to the mounting structure of the breaker 2.

[0007] The feature is that the plug-in breaker 2 is not directly attached to the mounting bracket, but is provided with a moving holder 4 for mounting the plug-in breaker 2 in the middle. The moving holder 4
Is mounted so that the plug-in breaker 2 is mounted and can be moved forward and backward along the surface of the mounting bracket 3 so as to face the bus bar 11.

That is, the moving holder 4 moves forward in the horizontal direction with respect to the bus bars 11 stacked vertically in the figure, and as shown in FIG. An important requirement is that the plug terminal fitting 21 and the bus bar 11 are disposed in such a positional relationship that they can be connected to each other or retreated and disconnected from the plug terminal fitting 21 and the bus bar 11 as shown in FIG. It is done.

The relationship between the moving holder 4 and the mounting bracket 3 in this case will be further described with reference to FIG. 3. The mounting bracket 3 has a hat-shaped cross section mainly including a mounting surface 31 for mounting the moving holder 4. A mounting plate 31 is provided with two mounting guide square holes 32 at the front and rear, and a guide projection 43 similarly protruding at the front and rear at the back surface of the moving holder 4. The guide projections 43 can be moved back and forth in a state of being fitted into the guide square holes 32, but cannot be moved left and right.

A front projection 41 for fixing is provided at the front of the movable holder 4, and a rear projection 42 for fixing is provided at the rear.
Are provided at the respective tips, and the locking projections 41a, 42
a is provided. As shown in FIG. 1, the plug-in breaker 2 has a front protrusion for fixing in a state where the locking protrusions 41 a and 42 a are fitted to the front locking recess 22 and the rear locking recess 23. It is clamped by the fixing projection 41 and the fixing rear projection 42 and is fixed on the moving holder 4.

In the case of FIG. 1 or FIG. 3, the fixing rear projection 42 is formed in a ridged shape, but if the fixing front projection 41 is elastically formed, the plug-in breaker 2 is fixed. At this time, when the plug-in breaker 2 is pushed downward in a state where the rear locking recess 23 and the fixing rear projection 42 are fitted together, the fixing front projection 41 is easily fitted into the front locking recess 22. The advantage that can be combined is obtained.

As described above, in the plug-in breaker mounting structure according to the present invention, the plug-in breaker linearly moves forward or backward along the guide square hole of the mounting bracket, that is, a plurality of bus bars arranged vertically. On the other hand, since the plug-in breaker moves forward and backward in the horizontal direction, when the plug-in breaker is connected or disconnected, the plug-in breaker is mounted on the moving holder and moved along the mounting bracket, so that the plug terminal breaks. Since the metal fitting always faces the bus bar and the plug terminal metal does not have a squeezing phenomenon in which an abnormal force is applied to the plug metal fitting from an oblique direction as in the related art, no abnormal deformation occurs.

Further, since the arrangement of the plug-in breakers is regulated by the movable holder 4, when a plurality of plug-in breakers are arranged side by side, the interval between them can be set to a predetermined width, and the plug-in breakers are shifted left and right. Can be incorporated without any problems.

The material of the moving holder can be made of an appropriate material having appropriate strength and elasticity, but a synthetic resin such as polyamide, polycarbonate or polyethylene may be used.

Next, another preferred embodiment of the present invention will be described. This is because, when the plug terminal fitting is connected to the bus bar, the moving holder 4 having the plug-in breaker is moved backward. A stopper element for stopping the movement is provided between the mounting member 3 and the stopper element. Specific examples of the stopper element are illustrated in FIGS.

FIG. 4 is a cross-sectional view of a main part of the rear part of the moving holder 4 and the mounting bracket 3. In this case, as shown in FIG. A fixing protrusion 44 is provided so that when the moving holder 4 moves forward (to the left in FIG. 4) as shown in FIG. 4B, the fixing protrusion 44 comes into contact. A locking concave portion 33 is provided in the metal fitting 3, and the locking convex portion 44 is fitted into the locking concave portion 33, so that the retreating movement of the movable holder 4 is restricted. In order to move the moving holder 4 backward, it is only necessary to apply a force to forcibly retract the moving holder 4.

FIG. 5 shows another stopper element. In this case, as shown in FIG. 5A, a locking claw 45a is provided at the rear end of the moving holding tool 4 at the tip. A part 45 is provided. The locking portion 45 is set so as to elastically urge the locking claw 45a at the tip downward, and the moving holder 4 moves forward as shown in FIG. 5B (to the left in FIG. 5). 2), a locking recess 33 is provided in a portion of the mounting bracket 3 where the locking claw 45a comes into contact, and the locking claw 45a is hooked on the locking recess 33, and the moving holder 4 is retracted. The movement is stopped.

In this case, in order to move the moving holder 4 backward, the rear end 45b of the locking portion 45 is pushed down,
What is necessary is just to pull up the locking claw 45a. In this way, if the stopper element is provided, the bus bar 11 and the plug terminal fitting 21 cannot be easily separated from each other, so that there is an advantage that the connection between them is assured.

Next, a preferred structure for more securely fixing the plug-in breaker 2 to the moving holder 4 will be described with reference to FIGS. In this embodiment, the plug-in breaker 2 includes locking protrusions 41a, 4
1a is fixed in a sandwiched state between the fixing front projection 41 and the fixing rear projection 42 provided with 2a.
As shown by the change from FIG. 2 to FIG. 2, when the moving holder 4 is moved forward and the plug terminal fitting 21 and the bus bar 11 are connected, the fixing front projection 41 of the moving holder 4 is connected. Is a cut-and-raised portion 3 formed at a front portion of the mounting bracket 3.
It is preferable to make a positional relationship in which the contact member 4 is brought into a pressed state by contacting the contact member 4.

In such a structure, since the fixing front projection 41 for holding the plug-in breaker 2 is elastic, it is supported by the cut-and-raised portion 34 in contact with the fixing front projection 41, so that the holding force is not loosened. As a result, the plug-in breaker itself is firmly held by the moving holder 4, and the plug-in breaker 2 falls off due to unexpected vibration or impact during transportation. Troubles such as can be avoided.

Further, according to the present invention, the connection between the bus bar and the plug terminal fitting can be smoothly released.
Can be embodied in the mounting structure exemplified in FIG. FIG.
FIG. 4 is a view showing a combined structure of the moving holder 4 and the mounting bracket 3 in a disassembled state for convenience of description of this embodiment. According to this figure, the moving holder 4 is not exposed by a mounting plug-in breaker. In the rear part, a shaft body 52 provided with a rotating operation part 51 having an eccentric convex part 51a at the head is screwed into a screw hole 35 of the mounting bracket 3 immediately below through a floating hole 46 of the moving holder 4.
By rotating the rotating operation part 51, the handle part 47 of the moving holder is pushed and moved by the eccentric convex part 51a, and the state shown in FIG. In this state, the moving holder 4 is moved backward by the eccentric distance x (the distance x shown in FIG. 6) of the eccentric convex portion 51a so that the connection between the bus bar and the plug terminal fitting can be released. It is.

In this embodiment, when the plug terminal fitting and the bus bar are connected to each other, the rotating operation section 51
At your fingertips or with a tool like a screwdriver,
By twisting by 0 degrees, the moving holder 4 can be moved very easily in the horizontal direction while the plug-in breaker 2 is mounted, so that oblique force is not applied to the plug terminal fitting as in the related art. Also, there is no risk of deforming the plug terminal fitting. In addition, the plug-in breaker 2 can be easily removed from the movement holder 4 by appropriately retreating as needed to a position where the plug-in breaker 2 can be further removed upward.

Further, another example of a structure that can smoothly release the connection between the bus bar and the plug terminal fitting will be described with reference to FIGS. 7 and 8. FIG. 7 is a diagram showing a state where the bus bar 11 and the plug terminal fitting 21 are connected. In the state of 7, each is set so that a slight gap is formed between the handle portion 47 at the rear portion of the moving holder 4 and the step portion 36 of the mounting bracket 3, and there is a bar jig having a tapered tip, For example, by inserting the tip of the driver tool 6 and prying backward, the handle portion 47 is pulled down, and the bus bar 11 and the plug terminal fitting 21 are pulled as shown in FIG.
Can be disconnected from the horizontal direction. In this case, there is an advantage that the number of components of the constituent members can be reduced.

[0024]

Since the plug-in breaker mounting structure of the present invention is configured as described above, the operation of connecting and disconnecting the plug terminal fitting from the direction directly facing the bus bar is performed. The operation can be performed, and an abnormal force is not applied to the plug terminal fitting from an oblique direction, so that an abnormal deformation does not occur. As a result, the possibility of poor contact can be eliminated.

Furthermore, according to the embodiment, the plug-in breaker has a sufficient mounting strength, there is no danger of falling off, and the operation of disconnecting the plug terminal fitting can be easily performed. is there. Therefore, the present invention has an extremely large industrial value as a plug-in breaker mounting structure that solves the conventional problems.

[Brief description of the drawings]

FIG. 1 is an essential part cross-sectional view for explaining operation of an embodiment of the present invention.

FIG. 2 Same as above.

FIG. 3 is an essential part perspective view showing a positional relationship between components according to the embodiment of the present invention.

FIG. 4 is a sectional view of a main part showing an example of a stopper element of the present invention.

FIG. 5 is a sectional view of a main part showing another example of the stopper element of the present invention.

FIG. 6 is a sectional view of an essential part showing a structure for disconnecting a terminal fitting of the present invention.

FIG. 7 is a sectional view of an essential part showing another structure for disconnecting the terminal fitting of the present invention.

FIG.

[Explanation of symbols]

Reference Signs List 11 bus bar, 2 plug-in breaker, 21 plug terminal fitting, 22 front locking recess, 23 rear locking recess, 24, 25, 3 mounting bracket, 31 mounting surface, 3
2 Guide square hole, 33 locking concave part, 34 cut and raised part,
35 screw hole, 4 moving holder, 41 fixing front projection, 41a locking projection, 42 fixing rear projection, 42
a locking projection, 43 guide projection, 44 locking projection, 4
5 locking member, 45a locking claw, 45b rear end, 46
Floating hole, 47 handle part, 51 rotation operation part, 51a
Eccentric convex, 52 shafts, 6 driver tools.

Continuation of the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H02B 1/40-1/42 H02B 1/30-1/32 H01H 73/06 H01H 73/20

Claims (3)

(57) [Claims] 1. A plug-in breaker mounting structure provided with plug terminal fittings connectable to a plurality of bus bars arranged in a vertical direction, wherein the plug-in breaker is mounted and the bus bar is arranged along a surface of the mounting fitting. forward and backward freely attached to the bar, Rutotomoni includes moving holder was its plug terminal metal piece and busbar and capable separable,
Move the plug-in breaker forward to move the plug end
When connecting the sub fitting and the bus bar, the plug
Fixing protrusion on the moving holder side for fixing the breaker
The raised piece comes into contact with the rising surface of the mounting
Mounting structure of the plug-breaker characterized in that it is a state. 2. The plug-in breaker according to claim 1, wherein a stopper element for stopping the retreating movement of the moving holder when the plug terminal fitting is connected to the bus bar is provided between the plug terminal fitting and the busbar. Mounting structure. 3. The moving holder has a shaft body provided with a rotating operation portion having an eccentric convex portion at its head, which is pivotally attached to a mounting bracket immediately below through a play hole of the moving holder. Claims: By rotating a moving operation part, the eccentric convex part presses and presses the moving holding tool to retreat, so that the connection between the plug terminal fitting of the mounted plug-in breaker and the bus bar can be released. 3. The mounting structure of the plug-in breaker according to 1 or 2 .