KR102023361B1 - Door locking device for switchboard case - Google Patents

Door locking device for switchboard case Download PDF

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Publication number
KR102023361B1
KR102023361B1 KR1020150056880A KR20150056880A KR102023361B1 KR 102023361 B1 KR102023361 B1 KR 102023361B1 KR 1020150056880 A KR1020150056880 A KR 1020150056880A KR 20150056880 A KR20150056880 A KR 20150056880A KR 102023361 B1 KR102023361 B1 KR 102023361B1
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KR
South Korea
Prior art keywords
door
switchboard case
case
switchboard
closed
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Application number
KR1020150056880A
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Korean (ko)
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KR20160126173A (en
Inventor
장봉윤
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엘에스산전 주식회사
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Priority to KR1020150056880A priority Critical patent/KR102023361B1/en
Publication of KR20160126173A publication Critical patent/KR20160126173A/en
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
    • H02B1/26—Casings; Parts thereof or accessories therefor
    • H02B1/30—Cabinet-type casings; Parts thereof or accessories therefor
    • H02B1/38—Hinged covers or doors
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
    • H02B1/26—Casings; Parts thereof or accessories therefor
    • H02B1/40—Wall-mounted casings; Parts thereof or accessories therefor
    • H02B1/44—Hinged covers or doors

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Patch Boards (AREA)
  • Distribution Board (AREA)

Abstract

A door locking device of a switchboard case is disclosed.
According to an embodiment of the present invention, a door locking device of a switchboard case provided between a switchboard case having a wiring breaker and a door coupled to the switchboard case so as to be openable and closed, the door hook protruding through the lower surface of the door, It is installed in the switchgear case, to provide a door locking device of the switchgear case including a cylindrical locking member to be locked to the door hook when the door is closed.

Figure R1020150056880

Description

DOOR LOCKING DEVICE FOR SWITCHBOARD CASE}

Embodiments of the present invention relate to a door locking device of the switchgear case, and more particularly, to a door locking device of the switchgear case that can be easily and conveniently opened and closed with a small force of the door of the switchgear case containing a wiring breaker.

Molded Case Circuit Breaker (MCCB) refers to an electrical device that protects circuits and loads by breaking the circuit under an overload or short circuit.

Such a circuit breaker is often installed inside the switchboard, and the switchboard case is provided with an external operation handle to manually operate the ON / OFF of the circuit breaker from the outside of the switchboard case.

1 is a view schematically showing a state of a switchboard case and a door coupled thereto according to the prior art, Figures 2 and 3 is a view showing a state before and after opening and closing the door.

1 to 3, a circuit breaker 150 is installed inside the switchboard case 110. In addition, an external operation handle 111 is provided outside the switchboard case 110 to manually operate the on / off of the circuit breaker 150.

The external operation handle 111 may manually operate the operation handle 151 of the circuit breaker 150 on / off through the operation link unit 130.

To this end, the operation link unit 130 is a handle mounting unit 131 to which the external operation handle 111 is coupled, a link member 133, a guide cam 134, a connecting rod 135, a mounting plate ( 137), latches, and the like.

When the external operation handle 111 is rotated in the set direction by the operation link unit 130 configured as described above, the operation handle 151 of the circuit breaker 150 is manually operated on / off from the outside of the switchboard case 110. Could.

On the other hand, the switchboard case 110 having such a structure is made of a box-shaped body provided with a storage space therein, one side (eg, the upper surface, etc.) was provided in an open form.

A door 120 capable of opening and closing up and down is coupled to the open portion, and the door hook 121 protrudes toward the switchboard case 110 toward the door 120.

An inclined surface 121a is provided at the lower end of the door hook 121.

If, as shown in Figure 2 when the door 120 is to cover and coupled to the switchboard case 110, the door hook 121 pushes the locking member 140, the locking member 140 Slides in the moving direction shown along the inclined surface 121a. Finally, as shown in FIG. 3, as the locking member 140 is caught and restrained by the door hook 121, the closed state between the door 120 and the switchboard case 110 may be maintained. .

By the way, the locking member 140 according to the prior art had a structure having a locking bar 141 of the plate shape.

Figure 4 is a three-dimensional view showing the shape and structure of the door hook and the locking member according to the prior art.

Referring to FIG. 4, the door hook 121 protrudes through the lower surface of the door 120, and the locking member 140 is disposed to face the protruding position of the door hook 121. 140 protrudes in the direction crossing the door hook 121.

In particular, the locking member 140 according to the related art is fastened between the locking bar 141 in the form of a plate, a fixing flange 142 provided at one end of the locking bar 141, and the fixing flange 142 and the latch. Included is a screw member 143. That is, after assembling the locking bar 141 in the fitting direction W, the screw member 143 may be fastened using the screw hole 142a of the fixing flange 142.

5 and 6 are views schematically showing the shape and structure of the external operation handle, the operation link portion and the locking member according to the prior art.

In particular, (a) and (b) of Figure 5 is a side view and a front view showing a state before closing the door, when the external operation handle 111 is in the reset (RESET) position.

6 (a) and 6 (b) are side and front views showing a state after the door is closed when the external operation handle 111 is in an OFF position.

Referring to Figure 5 (a), the process of pushing the inclined surface of the door hook 121, the locking member 140, more specifically the locking bar 141 when closing the door 120 toward the switchboard case 110 Shows.

If the force acting by the door hook 121 when the door 120 is closed is F, the force of the F is applied to the locking bar 141 by the distributed load f through the inclined surface of the door hook 121. . In addition, a section in which a frictional force such as f 'is applied through the L1 section between the inclined surface of the door hook 121 and the locking bar 141 is displayed.

In other words, according to the conventional structure, the locking bar 141 is in contact friction with the door hook 121. Since the locking bar 141 is formed in a plate shape, the locking bar 141 is mutually formed through the inclined surface of the door hook 121. Surface contact is made between the liver. For this reason, according to the conventional structure, the section L1 in which the friction force between the locking member 140 and the door hook 121 is applied is large, and thus a large force is required when closing the door 120.

Prior art related to the present invention is Republic of Korea Patent No. 10-1503315, which discloses the contents of the switchgear case external handle operation apparatus.

The present invention is to provide a door locking device of the switchgear case that can be easily and conveniently opened and closed with a small force the door of the switchgear case containing a wiring breaker.

In addition, the present invention is to provide a door locking device of the switchboard case that can simplify the structure of the locking member that is fixed to the door hook when the door is closed to reduce the number of parts and improve the assembly.

The problem to be solved by the present invention is not limited to the above-mentioned task (s), another task (s) not mentioned herein will be clearly understood by those skilled in the art from the following description.

According to an embodiment of the present invention, a door locking device of a switchboard case provided between a switchboard case having a wiring breaker and a door coupled to the switchboard case so as to be openable and closed, a door hook protruding through a lower surface of the door ; And a cylindrical locking member installed on the switchboard case and fixed to the door hook when the door is closed to fix the closed state of the door.

The locking member may include a body part provided at the switchboard case so as to face the door hook and protruding in a protruding direction of the door hook; And a fastening part for fastening the body part to the switchboard case.

The body part may be a cylindrical member that is pressed against the inclined surface of the door hook when the door is closed, and fixed to the door hook after the door is closed.

The body part may include a core part formed at a central portion of the cross section, and a periphery formed on a circumference of the core part and replaceable when damaged due to friction with the door hook.

The fastening part may have a diameter smaller than that of the body part, and may be screwed to a latch of a handle mounting part to which an external operation handle is coupled in the switchboard case.

The fastening part may have a diameter smaller than that of the body part, and may be riveted through a latch of a handle mounting part to which an external operation handle is coupled in the switchboard case.

According to the present invention, the door of the switchboard case in which the circuit breaker is incorporated can be easily opened and closed even with a small force, thereby improving user convenience.

In addition, according to the present invention, by simplifying the structure of the locking member that is fixed to the door hook when the door is closed, it is possible to reduce the cost by reducing the number of parts, it is possible to improve the assembly.

1 is a view briefly showing the appearance of a switchboard case and a door coupled thereto according to the prior art.
2 and 3 are views showing the state before and after opening and closing the door.
Figure 4 is a three-dimensional view showing the shape and structure of the door hook and the locking member according to the prior art.
5 is a side view and a front view showing a state in which the door is closed when the external operation handle according to the prior art is in the reset (RESET) position.
Figure 6 is a side view and a front view showing a state after closing the door, when the external operation handle according to the prior art in the OFF (OFF) position.
7 is a view briefly showing the coupling relationship between the door hook and the locking member according to an embodiment of the present invention.
8 is a view showing a force action relationship between the door hook and the locking member when the door is closed in accordance with an embodiment of the present invention.
9 is a view briefly showing a locking member in the door locking device of the switchboard case according to an embodiment of the present invention.
10 is a view briefly illustrating a modification of the locking member in the door locking device of the switchboard case according to the embodiment of the present invention.
11 is a view briefly showing another modification of the locking member in the door locking device of the switchboard case according to the embodiment of the present invention.
12 is a side view and a front view showing a state in which the door is closed when the external operation handle is in the reset position in the door locking device of the switchboard case according to the embodiment of the present invention.
Figure 13 is a side view and a front view showing a state after closing the door, when the external operation handle in the OFF position of the door locking device of the switchboard case according to an embodiment of the present invention.

Hereinafter, a door locking device of a switchboard case according to embodiments of the present invention will be described in detail with reference to the accompanying drawings.

As is well known, a molded case circuit breaker (MCCB) refers to an electric device that protects a circuit and a load by breaking a circuit in an electrically overloaded or shorted state.

In addition, such a circuit breaker is often installed inside the switchboard, and a separate external operation handle is provided to manually operate the ON / OFF of the circuit breaker from the outside of the switchboard case.

The door locking device of the switchboard case according to the embodiment of the present invention is opened and closed on a switchboard case 110 (see FIG. 1) in which a circuit breaker 150 (see FIG. 1) is incorporated, and the switchboard case 110 (see FIG. 1). It may be provided between the door 120 (see Fig. 1) that is possibly coupled.

7 is a view briefly showing the coupling relationship between the door hook and the locking member according to an embodiment of the present invention.

Referring to FIG. 7A, the door locking device of the switchboard case may include a door hook 121 and a locking member 200.

The door hook 121 may be provided to protrude downward through the lower surface of the door 120, and an inclined surface 121a may be formed at a lower end thereof.

The locking member 200 may be installed at the switchboard case 110. The locking member 200 may be provided in a form that can be caught and fixed to the door hook 121 when the door 120 is closed.

For example, the locking member 200 has a circular cross section and a body portion 210 fixed to the door hook 121 and a fastening portion 220 for coupling the body portion 210 to the switchboard case 110. It may be configured to include).

The body portion 210 may be provided at a position that may interfere with the door hook 121 when closing the door 120 facing the door hook 121.

For example, the body portion 210 may protrude in a direction (eg, a horizontal direction) intersecting with the protruding direction of the door hook 121, but is not limited thereto.

In addition, the body portion 210 interferes with the door hook 121 when the door 120 is closed. In particular, the body portion 210 is in contact with the inclined surface 121a of the door hook 121 by the closing force of the door 120. It may be moved along the inclined surface 121a. The body portion 210 may be fixed to the door hook 121.

The body part 210 may be formed of a pin-shaped member having a circular cross section. Accordingly, when the door 120 is closed, the body part 210 contacts the inclined surface 121a of the door hook 121 in a small area. The friction force can be reduced. As a result, the door 120 may be closed using a relatively small force as compared with the related art.

The fastening part 220 may screw the body part 210 to the switchboard case 110. For example, the fastening part 220 may be formed by tapping.

As a specific example, the fastening part 220 may have a diameter smaller than that of the body part 210. In addition, the fastening part 220 may be fastened through a screw hole 138b provided at a lower end of the latch 138 of the handle mounting part 131 to which the external operation handle 111 is coupled in the switchboard case 110. It is not necessarily limited thereto.

Here, the external operation handle 111 refers to a handle used for manually operating the on / off of the circuit breaker 150 (see FIG. 1) installed inside the switchboard case 110 from the outside of the switchboard case 110. . And the external operation handle 111 may be coupled to the handle mounting portion 131 which is installed on the switchboard case 110 side.

8 is a view showing a force action relationship between the door hook and the locking member when the door is closed according to an embodiment of the present invention.

Referring to FIG. 8, a door hook 121 protrudes through a lower surface of the door 120, and a position at which the door hook 121 moves to face the door hook 121 toward the switchboard case 110. The locking member 200 may be disposed to interfere with the interference.

In this case, when the door 120 is closed toward the switchboard case 110, the inclined surface 121a of the door hook pushes the locking member 200 while the door hook 121 moves downward.

That is, if the force acting by the door hook 121 when the door 120 is closed is F, the load applied to the locking member 200 through the inclined surface 121a of the door hook 121 is It acts as a concentrated load f rather than a distributed load.

In addition, the section in which the friction force f 'acts between the inclined surface 121a of the door hook 121 and the engaging member 200 of the circular cross section is L2, and the section in which the friction force f' acts is reduced as compared with the conventional art. This makes it possible to close the door with less force than in the prior art.

9 is a view briefly showing a locking member 200 according to an embodiment of the present invention.

Referring to FIG. 9, the locking member 200 may include a body portion 210 and a fastening portion 220.

The body portion 210 may be a cylindrical member.

In addition, the fastening part 220 may have a diameter smaller than that of the body part 210, and a thread may be formed around an outer circumferential surface thereof.

10 is a view briefly illustrating a modification of the locking member in the door locking device of the switchboard case according to the embodiment of the present invention.

Referring to FIG. 10, the locking member 200 according to the modified example may be confirmed that the configuration of the body portion 210 is changed.

Body portion 210 according to the modification shown, may be configured to include a core portion 211 and the outer skin (213).

The core member 211 may be formed at the center of the circular cross section. For example, the core member 211 is made integrally with the fastening portion 220 to prevent structural deformation and damage (eg, bending deformation, breakage, etc.) of the body portion 210 and may be made of a good strength material. have.

In contrast, the outer skin 213 may be formed on the circumference of the core member 211. For example, the outer skin portion 213 may be formed of a replaceable structure when damaged by contact and friction with the door hook 121, but is not limited thereto.

As such, the body portion 210 does not necessarily have to be made of a single material, and may be made of different materials with functional differences for each part.

11 is a view showing another modified example of the locking member in the door locking device of the switchboard case according to the embodiment of the present invention.

Referring to FIG. 11, the illustrated locking member 200 is connected to the fastening part 220 through the latch 138, but is not a structure in which the fastening part 220 is screwed and fixed to the latch 138. The rivet 221 is fastened to the fastening part 220 so that the body part 210 may be rotatably connected in the latch 138.

Accordingly, the friction may be relatively reduced compared to the structure in which the locking member 200 is screwed to the latch 138.

12 (a) and 12 (b) are side and front views showing a state in which the door is closed when the external operation handle is in the reset position in the door locking device of the switchboard case according to the embodiment of the present invention. .

12A and 12B, when the door 120 is closed toward the switchboard case 110, the inclined surface 121a of the door hook 121 pushes the locking member 200 having a circular cross section. You can see how you give.

At this time, the locking member 200 is made of a circular cross-section unlike the prior art to reduce the friction area with the door hook 121 can close the door 120 with less force than the conventional.

Figure 13 (a) and (b) is a side view showing a state after closing the door 120, when the external operation handle in the OFF position of the door locking device of the switchboard case according to an embodiment of the present invention and Front view.

Referring to FIGS. 13A and 13B, the external operation handle 111 is in an OFF position, and the door 120 is closed on the switchboard case 110. At this time, the locking member 200 is fixed to the door hook 121.

As described above, according to the configuration and operation of the present invention, it is possible to open and close the door of the switchboard case containing the circuit breaker easily and easily with a small force can improve user convenience.

Furthermore, when closing the door of the switchboard case in which the circuit breaker is embedded, the structure of the locking member fixed to the door hook is simplified, thereby reducing the cost according to the reduction of the number of parts and improving the assemblability.

Although the present invention has been described with respect to the door locking device of the switchboard case of the present invention, it is apparent that various implementation modifications are possible without departing from the scope of the present invention.

And the above-described embodiments are to be understood in all respects as illustrative and not restrictive, the scope of the present invention is indicated by the appended claims rather than the detailed description, the meaning and scope of the claims and their All changes and modifications derived from equivalent concepts should be construed as being included in the scope of the present invention.

110: switchboard case 111: external operation handle
111a: hinge portion 111b: handle portion
120: door 121: door hook
121a: slope 130: operation link portion
131: handle mounting portion 132: operation cam
133 link member 134: guide cam
135: connecting rod 136: operating lever
137: mounting plate 138: latch
138a: latch projection 138b: screw hole
139: latch holder 139a: receiving groove
150: wiring breaker 151: operation handle
200: locking member 210: body portion
220: fastening portion 221: rivet

Claims (6)

A door latch device of a switchboard case provided between a switchboard case having a wiring breaker and a door coupled to the switchboard case so as to be openable and closed.
A door hook protruding through a lower surface of the door; And
It is installed in the switchboard case, and includes a cylindrical locking member to be locked to the door hook to close the door when the door is closed,
The locking member may include a body part provided at the switchboard case so as to face the door hook and protruding in a protruding direction of the door hook; And
It includes a fastening portion for fastening the body portion to the switchboard case,
The fastening part has a diameter smaller than that of the body part and is fastened to a latch of a handle mounting part to which an external operation handle is coupled in the switchboard case.
Door latch on the switchboard case.
delete The method of claim 1,
The body portion,
When the door is closed, it is pressed against the inclined surface of the door hook,
The door locking device of the switchboard case is a cylindrical member that is fixed to the door hook after the door is closed.
The method of claim 3,
The body portion,
Core member formed in the center of the cross section,
Is formed on the periphery of the core portion, the door locking device of the switchgear case including a replaceable outer skin when damaged by friction with the door hook.
The method of claim 1,
The fastening portion,
The door locking device of the switchboard case screwed to the latch of the handle mounting portion.
The method of claim 1,
The fastening portion,
The door locking device of the switchgear case is riveted through the latch of the handle mounting portion.
KR1020150056880A 2015-04-22 2015-04-22 Door locking device for switchboard case KR102023361B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020150056880A KR102023361B1 (en) 2015-04-22 2015-04-22 Door locking device for switchboard case

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020150056880A KR102023361B1 (en) 2015-04-22 2015-04-22 Door locking device for switchboard case

Publications (2)

Publication Number Publication Date
KR20160126173A KR20160126173A (en) 2016-11-02
KR102023361B1 true KR102023361B1 (en) 2019-09-23

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KR1020150056880A KR102023361B1 (en) 2015-04-22 2015-04-22 Door locking device for switchboard case

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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101503315B1 (en) * 2013-11-11 2015-03-17 엘에스산전 주식회사 External operation handle device for switchboard case

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR200446456Y1 (en) * 2006-11-09 2009-11-03 손상덕 Auto lock
KR101017558B1 (en) * 2008-11-17 2011-02-28 풍원공업 주식회사 Door hinge
KR101162618B1 (en) * 2009-02-23 2012-07-05 주식회사 이디엘 Handle for locking door

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101503315B1 (en) * 2013-11-11 2015-03-17 엘에스산전 주식회사 External operation handle device for switchboard case

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