JP2022178595A - Door frame and circuit breaker system - Google Patents

Abstract

To obtain a door frame capable of reducing a gap between the door frame and a circuit breaker body.SOLUTION: A door frame 6 is configured to cover an edge of an opening part 71a formed on a door 71 of a panel 7 in which a draw-out type circuit breaker is stored. The door frame 6 is brought in contact with a circuit breaker body 1 to extend in a direction perpendicular to a drawing-out direction of the circuit breaker body 1 when the circuit breaker body 1 of the draw-out type circuit breaker is drawn out from the opening part 71a.SELECTED DRAWING: Figure 10

Description

TECHNICAL FIELD The present disclosure relates to a door frame and circuit breaker system covering the edge of an opening formed in a door in a board in which a drawer circuit breaker is housed.

A drawer-type device is known that is housed in a board such as a switchboard or a distribution board and moves from a connection position to a disconnection position so that an operation part protrudes from an opening of a door. Since there is a gap between the opening and the operating portion, Patent Literature 1 discloses a technique of providing a packing that closes the gap between the operating portion and the opening.

JP 2009-118567 A

In a drawer-type circuit breaker in which a circuit breaker body including an operating portion is pulled out, a door frame is attached to cover the edge of an opening formed in a panel door. Door frames are installed by the customer, but there are variations in installation positions and installation methods. be provided.

With a draw-out type circuit breaker, when the breaker body is pulled out from the draw-out frame or inserted into the draw-out frame, the breaker body may swing up and down due to the structure of the draw-out type circuit breaker. The gap between the circuit breaker body and the door frame must be increased by only

When the door frame is provided with a packing that fills the gap as in the technique described in Patent Document 1, a large frictional force between the packing and the circuit breaker body causes the circuit breaker body to be pulled out of the drawer frame and the circuit breaker body. A large force is required for insertion into the drawer cradle. Therefore, it is difficult to apply the technique described in Patent Document 1 to the door frame.

The present disclosure has been made in view of the above, and an object thereof is to obtain a door frame capable of reducing a gap with a circuit breaker body.

In order to solve the above-described problems and achieve the object, the door frame of the present disclosure is a door frame that covers the edge of the opening formed in the door of the board in which the drawer-type circuit breaker is stored. When the circuit breaker body of the draw-out type circuit breaker is pulled out, it contacts the circuit breaker body and extends in a direction perpendicular to the direction in which the circuit breaker body is pulled out.

According to the present disclosure, it is possible to reduce the gap with the circuit breaker body.

Appearance perspective view of the draw-out type circuit breaker according to the first embodiment 1 is an external perspective view showing a drawer-type circuit breaker in a state in which a circuit breaker body according to Embodiment 1 is pulled out from inside a drawer frame; FIG. 2 is a diagram for explaining the configuration of the drawer mechanism in the drawer circuit breaker according to the first embodiment; 1 is a front view showing a circuit breaker system including a drawer circuit breaker housed in a panel and a door frame attached to a door of the panel according to the first embodiment; FIG. FIG. 5 is a side view showing the circuit breaker system shown in FIG. 4; Enlarged view of region X shown in FIG. Front view of the door frame according to the first embodiment Rear view of the door frame according to the first embodiment An enlarged view of a part of the door frame shown in FIG. FIG. 4 is a diagram showing a state in which the circuit breaker body according to the first embodiment has started to be pulled out from the drawer cradle; Enlarged view of region X shown in FIG. Front view showing the circuit breaker system in the state shown in FIG. Enlarged view of area Y shown in FIG. FIG. 4 is a side view showing another example of the circuit breaker main body of the drawer circuit breaker according to the first embodiment;

A door frame and a circuit breaker system according to embodiments will be described in detail below with reference to the drawings.

Embodiment 1.
FIG. 1 is an external perspective view of a drawer circuit breaker according to Embodiment 1. FIG. FIG. 2 is an external perspective view of the draw-out circuit breaker with the circuit breaker main body according to the first embodiment pulled out from the draw-out frame. 1 and 2 show a state in which a part of the drawer frame of the drawer-type circuit breaker has been cut.

As shown in FIGS. 1 and 2, the drawer circuit breaker 100 according to the first embodiment includes a circuit breaker body 1 for opening and closing an electric circuit, a terminal device 2 connected to the circuit breaker body 1, and a terminal device 2 and a drawer frame 3 for accommodating the circuit breaker body 1 in a drawable manner. Hereinafter, the direction in which the circuit breaker body 1 is pulled out from the drawer frame 3 is defined as the front direction, and the direction in which the circuit breaker body 1 is inserted into the drawer frame 3 is defined as the rear direction.

As shown in FIG. 2, the draw-out frame 3 includes a draw-out frame body 31 that houses the circuit breaker body 1, and a telescoping mechanism that is connected to the breaker body 1 so that the circuit breaker body 1 can be pulled out from the draw-out frame body 31. and a position detection rail 33 arranged in the drawer frame main body 31 .

The circuit breaker main body 1 includes an insulating housing 10 as shown in FIG. The housing 10 has a body case 11 and a body cover 12 . On the front surface 12a of the body cover 12, as shown in FIGS. 1 and 2, a handle 13 for manually energizing a closing spring (not shown) provided in the housing 10, and a handle 13 for closing the electrical circuit. A close button 14 and an open button 15 for opening the electric circuit are arranged.

A drawer mechanism 4 for drawing out the circuit breaker main body 1 from the drawer frame 3 is provided at the lower portion of the circuit breaker main body 1 . FIG. 3 is a diagram for explaining the configuration of the drawer mechanism in the drawer circuit breaker according to the first embodiment, and shows a diagram corresponding to a cross-sectional view taken along line III-III shown in FIG. there is

As shown in FIG. 3 , the drawer mechanism section 4 includes a front panel 41 , a support section 42 , a main screw 43 , a compression spring 44 and an insert screw 45 . The front panel 41 , the support portion 42 and the main screw 43 are provided on the circuit breaker body 1 , and the insert screw 45 is provided on the drawer frame 3 . A drawer handle 5 is used to draw out the circuit breaker body 1 from the drawer frame 3 . The drawer handle 5 includes a shaft portion 51 and a handle 52 .

An operator pulls out the circuit breaker body 1 from the drawer frame 3 when performing maintenance on the circuit breaker body 1 or the like. At this time, as shown in the frame A of FIG. It is inserted into the engaging portion 43a1 of the cylindrical portion 43a formed.

Then, the operator rotates the handle 52 of the drawer handle 5 around the shaft portion 51 of the drawer handle 5 to rotate the main screw 43 . As a result, the screw portion 43b of the main screw 43 and the threaded hole 45a of the insert screw 45 are disengaged.

After the screw portion 43b of the main screw 43 is disengaged from the threaded hole 45a of the insert screw 45, the operator pulls the drawer handle 5 away from the drawer frame 3 as shown in the frame B of FIG. is moved forward. Thereby, the operator can pull out the circuit breaker main body 1 from the drawer frame 3 .

Further, when the operator inserts the circuit breaker main body 1 pulled out from the drawer frame 3 into the drawer frame 3, the operator pushes the circuit breaker main body 1 in the rearward direction toward the drawer frame 3, The main body 1 is inserted to a specific position in the drawer frame 3. As a result, the screw portion 43b of the main screw 43 comes into contact with the threaded hole 45a of the insert screw 45. As shown in FIG.

After that, the operator rotates the main screw 43 by rotating the handle 52 of the drawer handle 5 . As a result, the screw portion 43b of the main screw 43 is inserted into the threaded hole 45a of the insert screw 45, and the circuit breaker body 1 is inserted into the drawer frame 3 as shown in FIG.

The drawer circuit breaker 100 described above is housed in a panel such as a switchboard or distribution panel so that the circuit breaker main body 1 can be pulled out from an opening formed in the door of the panel. The opening of the door is formed, for example, by panel cutting, and a door frame is attached to the door to cover the edge, which is the processed surface of the opening.

FIG. 4 is a front view showing a circuit breaker system including a drawer circuit breaker housed in a panel and a door frame attached to a door of the panel according to the first embodiment. 5 is a side view of the circuit breaker system shown in FIG. 4; FIG. FIG. 6 is an enlarged view of region X shown in FIG.

As shown in FIG. 4 , the circuit breaker system 200 includes a drawer circuit breaker 100 and a door frame 6 . A draw-out type circuit breaker 100 is arranged in the panel 7 . The board 7 is a board such as a switchboard or a distribution board. A door 71 of the board 7 is formed with an opening 71a.

The door frame 6 is designed to cover the edge of the opening 71a and is positioned to cover the edge of the opening 71a. The opening 71a is formed by, for example, panel cutting. In this case, the edge of the opening 71a is a surface processed by panel cutting.

When the circuit breaker body 1 of the drawer circuit breaker 100 is pulled out from the opening 71 a of the door 71 of the panel 7 , the door frame 6 comes into contact with the circuit breaker body 1 to pull out the circuit breaker body 1 from the drawer frame 3 . It expands and contracts in the vertical direction, which is the direction perpendicular to the 4 to 6, the circuit breaker body 1 is housed in the drawer frame 3, and the door frame 6 is not in contact with the body cover 12 of the circuit breaker body 1. FIG.

7 is a front view of the door frame according to the first embodiment; FIG. 8 is a rear view of the door frame according to the first embodiment; FIG. As shown in FIGS. 7 and 8, the door frame 6 includes a pair of fixed portions 61 and 62 and a pair of movable portions 63 and 64. As shown in FIGS. An opening 6 a of the door frame 6 is formed by the pair of fixed portions 61 and 62 and the pair of movable portions 63 and 64 .

A pair of fixing portions 61 and 62 are fixed to the door 71 at positions facing each other through the opening 71a. In the example shown in FIG. 7, the pair of fixing portions 61 and 62 are fixed to the door 71 at positions facing each other in the left-right direction through the opening 71a.

The pair of movable parts 63 and 64 are positioned to face each other through the opening 71a in a direction perpendicular to the direction in which the circuit breaker body 1 is pulled out from the drawer frame 3 and the direction in which the pair of fixed parts 61 and 62 face each other. placed. In the example shown in FIG. 7, the pair of movable parts 63 and 64 are arranged at positions opposed to each other in the vertical direction.

As shown in FIG. 8, the door frame 6 includes a plurality of springs 65, 66, 67, 68 that span between each of the pair of fixed portions 61, 62 and each of the pair of movable portions 63, 64. ing. The movable portion 63 can move upward against the biasing force of the springs 65 and 66 , and the movable portion 64 can move downward against the biasing force of the springs 67 and 68 . As a result, the door frame 6 can expand and contract in the vertical direction, and the opening 6a of the door frame 6 expands and contracts as the door frame 6 expands and contracts in the vertical direction.

Specifically, a locking portion 61a having a square hole is formed on the rear surface of the fixed portion 61, a locking portion 62a having a square hole is formed on the rear surface of the fixed portion 62, and a rear surface of the movable portion 63 is formed. Locking portions 63a and 63b having square holes are formed on the rear surface of the movable portion 64, and locking portions 64a and 64b having square holes are formed on the rear surface of the movable portion 64. As shown in FIG.

One end of the spring 65 is attached to a square hole of the locking portion 61 a of the fixed portion 61 , and the other end is attached to a square hole of the locking portion 63 a of the movable portion 63 . The spring 66 has one end attached to a square hole of the locking portion 62 a of the fixed portion 62 and the other end attached to a square hole of the locking portion 63 b of the movable portion 63 . The spring 67 has one end attached to the locking portion 61 a of the fixed portion 61 and the other end attached to the locking portion 64 a of the movable portion 64 . The spring 68 has one end attached to the locking portion 62 a of the fixed portion 62 and the other end attached to the locking portion 64 b of the movable portion 64 .

9 is an enlarged view of a part of the door frame shown in FIG. 8. FIG. As shown in FIG. 9, protrusions 61b and 61c are formed on the rear surface of the side wall of the fixed portion 61, and projecting portions 61b and 61c projecting in the left-right direction are formed in the movable portion 63. A concave portion 63c is formed, and a side wall of the movable portion 64 is formed with a concave portion 64c that is notched downward from the end portion.

The projecting portion 61b of the fixed portion 61 is arranged in the recessed portion 63c of the movable portion 63, and is guided by the recessed portion 63c so as to be vertically movable. The movable portion 63 is pulled downward by a spring 65, and when no force is applied to the movable portion 63, the protrusion 61b abuts the concave portion 63c in the vertical direction, and the movable portion 63 is pulled downward as shown in FIG. maintained in condition. Since the relationship between the fixed portion 62 and the movable portion 63 is the same as the relationship between the fixed portion 61 and the movable portion 63, the movable portion 63 is in the state shown in FIGS. 7 and 8 when no force is applied. maintained.

Further, the projecting portion 61c of the fixed portion 61 is arranged in the recessed portion 64c of the movable portion 64, and is guided by the recessed portion 64c so as to be movable in the vertical direction. The movable portion 64 is pulled upward by a spring 67, and when no force is applied to the movable portion 64, the protrusion 61c abuts the recess 64c in the vertical direction, and the movable portion 64 is pulled upward as shown in FIG. maintained in condition. Since the relationship between the fixed portion 62 and the movable portion 64 is the same as the relationship between the fixed portion 61 and the movable portion 64, the movable portion 64 is in the state shown in FIGS. 7 and 8 when no force is applied. maintained.

In this way, the movable parts 63 and 64 are maintained in the states shown in FIGS. 7 and 8 when no force is applied, and the opening 6a of the door frame 6 is kept in the minimum state shown in FIGS. be. When an upward force acts on the movable portion 63, the movable portion 63 moves upward against the tensile force of the springs 65 and 66, and the opening 6a of the door frame 6 expands. Similarly, when a downward force acts on the movable portion 64, the movable portion 64 moves downward against the tensile force of the springs 67 and 68, and the opening 6a of the door frame 6 expands.

In the door frame 6, the locking portions 61a, 62a, 63a, 63b, 64a, 64b and the plurality of springs 65, 66, 67, 68 constitute an expansion mechanism, and the fixing portions 61, 62 are connected to the expansion mechanism. It has the function of covering so that it cannot be seen from the front.

Next, the relationship between the circuit breaker main body 1 and the door frame 6 in the drawing operation of the circuit breaker main body 1 from the drawer frame 3 and the insertion operation of the circuit breaker main body 1 into the drawer frame 3 will be described. 10 is a diagram showing a state in which the circuit breaker body according to Embodiment 1 has started to be pulled out from the drawer frame, and FIG. 11 is an enlarged view of region X shown in FIG. 12 is a front view showing the circuit breaker system in the state shown in FIG. 10. FIG. FIG. 13 is an enlarged view of region Y shown in FIG.

As shown in FIG. 10, when the circuit breaker main body 1 inserted into the drawer frame 3 (not shown) is pulled out from the drawer frame 3, the front surface 12a of the circuit breaker main body 1 changes from the state shown in FIG. It moves upward, and the circuit breaker main body 1 inclines upward.

Therefore, the upper surface 12b of the main body cover 12 of the circuit breaker main body 1 contacts the movable portion 63 of the door frame 6, and the movable portion 63 moves upward against the biasing force of the springs 65,66. Thereby, the door frame 6 extends vertically as shown in FIGS. 12 and 13 . 12 and 13, the extension state of the door frame 6 is indicated by two-dot chain lines.

5 and 10, the upper surface 12b of the main body cover 12 is a tapered surface that is inclined with respect to the drawer direction, and is located upward toward the drawer frame 3. The opening 6a of the door frame 6 can be enlarged smoothly as compared with the case of not tilting.

5 and 10, the lower surface 12c of the main body cover 12 is a tapered surface that is inclined with respect to the drawer direction, and is located downward toward the drawer frame 3. As shown in FIG. Therefore, the gap between the lower surface 12c of the main body cover 12 and the door frame 6 is prevented from increasing while the circuit breaker main body 1 is tilted upward and pulled out from the drawer frame 3 .

When the circuit breaker body 1 that has been pulled out is inserted into the drawer frame 3, the front surface 12a of the circuit breaker body 1 moves downward from the state shown in FIG. do. Therefore, the lower surface 12c of the body cover 12 of the circuit breaker body 1 comes into contact with the movable portion 64 of the door frame 6, and the movable portion 64 moves downward against the biasing force of the springs 67 and 68. As shown in FIG.

In addition, the lower surface 12c of the main body cover 12 is a tapered surface that is inclined with respect to the drawer direction, and is located downward toward the drawer frame 3. The opening 6a of can be enlarged smoothly.

Further, the upper surface 12b of the body cover 12 is a tapered surface that is inclined with respect to the drawer direction, and is located upward toward the drawer frame 3 . Therefore, the gap between the upper surface 12b of the main body cover 12 and the door frame 6 is prevented from increasing while the circuit breaker main body 1 is tilted downward and inserted into the drawer frame 3 .

In the above example, the case where the circuit breaker body 1 is tilted upward and pulled out from the drawer frame 3 has been described. , the opening 6a of the door frame 6 is enlarged, and the movable portions 63 and 64 can be kept in contact with the body case 11. As shown in FIG.

In the above example, the upper surface 12b and the lower surface 12c of the body cover 12 are tapered surfaces, but the upper surface 12b and the lower surface 12c of the body cover 12 may be surfaces parallel to the pull-out direction. In this case, on the upper surface 12b side and the lower surface 12c side of the main body cover 12, dedicated members forming tapered surfaces are detachably attached.

14 is a side view showing another example of the circuit breaker body of the draw-out circuit breaker according to the first embodiment. FIG. As shown in FIG. 14, a dedicated member 16 is detachably attached to the circuit breaker main body 1 to form a tapered surface 16a on the upper surface 12b side of the main body cover 12, and a tapered surface 17a is formed on the lower surface 12c side of the main body cover 12. A dedicated member 17 to be formed is detachably attached. As a result, the circuit breaker body 1 can be drawn out smoothly from the drawer frame 3 .

In the example described above, the door frame 6 is configured to expand and contract in the vertical direction. may be configured to expand and contract in the left-right direction. Further, when the circuit breaker body 1 swings vertically and horizontally when the circuit breaker body 1 is pulled out from the drawer frame 3, the door frame 6 may be configured to expand and contract in the vertical direction and the horizontal direction. .

As described above, the door frame 6 according to the first embodiment is a door frame that covers the edge of the opening 71a formed in the door 71 of the board 7 in which the drawer circuit breaker 100 is stored. When the circuit breaker body 1 of the drawer-type circuit breaker 100 is pulled out, it contacts with the circuit breaker body 1 and expands and contracts in a direction perpendicular to the drawing direction of the circuit breaker body 1 . As a result, the door frame 6 can reduce the gap between the circuit breaker main body 1 and the circuit breaker main body 1 while allowing the circuit breaker main body 1 to be pulled out from the opening 71a. Formation with the main body 1 can be avoided.

The door frame 6 also includes a pair of fixed portions 61 and 62 and a pair of movable portions 63 and 64 . A pair of fixing portions 61 and 62 are fixed to the door 71 at positions facing each other through the opening 71a. The pair of movable parts 63, 64 are arranged at positions facing each other through the opening 71a in the vertical direction, which is the direction orthogonal to the direction in which the circuit breaker main body 1 is pulled out and the direction in which the pair of fixed parts 61, 62 face each other. , and are connected to fixing portions 61 and 62 via springs 65 , 66 , 67 and 68 . As a result, the door frame 6 allows the circuit breaker body 1 to be pulled out from the opening 71a even if the circuit breaker body 1 swings in a direction intersecting the drawing direction when the circuit breaker body 1 is pulled out from the drawer frame 3. It is possible to reduce the gap with the circuit breaker body 1 while enabling it.

The pair of movable parts 63 and 64 face each other in the vertical direction and can move in the vertical direction while contacting the circuit breaker main body 1 . As a result, the door frame 6 allows the circuit breaker main body 1 to be pulled out from the opening 71a even if the circuit breaker main body 1 swings up and down when the circuit breaker main body 1 is pulled out from the drawer frame 3. A gap with the circuit breaker main body 1 can be reduced.

Further, the circuit breaker main body 1 has tapered surfaces in which the upper surface 12b and the lower surface 12c, which are regions that contact the pair of movable portions 63 and 64 when pulled out from the opening 71a, are inclined with respect to the pull-out direction. Thereby, in the circuit breaker system 200, the circuit breaker main body 1 can be pulled out smoothly from the drawer frame 3. As shown in FIG.

The configuration shown in the above embodiment is an example, and can be combined with another known technique, and part of the configuration can be omitted or changed without departing from the scope of the invention. It is possible.

1 circuit breaker main body 2 terminal device 3 drawer frame 4 drawer mechanism 5 drawer handle 6 door frame 6a, 71a opening 7 board 10 housing 11 main body case 12 main body cover 12a front surface 12b Upper surface 12c Lower surface 13 Handle 14 Close button 15 Open button 16, 17 Dedicated member 16a, 17a Tapered surface 31 Drawer frame main body 32 Drawer rail 33 Position detection rail 41 Front panel 42 Support part 43 main screw, 43a cylindrical portion, 43a1 engaging portion, 43b screw portion, 44 compression spring, 45 insert screw, 45a screw hole, 46 insertion hole, 51 shaft portion, 51b tip portion, 52 handle, 61, 62 fixing portion, 61a, 62a, 63a, 63b, 64a, 64b locking portion 61b, 61c protrusion 63, 64 movable portion 63c, 64c recess 65, 66, 67, 68 spring 71 door 100 drawer circuit breaker, 200 circuit breaker system.

Claims (4)

A door frame covering an edge of an opening formed in a panel door in which the drawer-type circuit breaker is stored,
A door frame that contacts the circuit breaker body and extends in a direction orthogonal to a drawing direction of the circuit breaker body when the circuit breaker body of the drawer circuit breaker is pulled out from the opening. a pair of fixing parts fixed to the door at positions facing each other through the opening;
a pair of movable parts arranged at positions facing each other through the opening in a direction orthogonal to the pull-out direction and the direction in which the pair of fixed parts face each other, and connected to the fixed part via a spring; 2. The door frame of claim 1, comprising: The pair of movable parts are
The door frame according to claim 2, wherein the door frames face each other in the vertical direction and are movable in the vertical direction while contacting the circuit breaker body. A door frame according to claim 2 or 3;
and the draw-out type circuit breaker,
The circuit breaker body is
A circuit breaker system, wherein a region that contacts the pair of movable parts when pulled out from the opening has a tapered surface that is inclined with respect to the pull-out direction.

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