Misoperation prevention device

Abstract

To provide an erroneous operation prevention device capable of surely preventing erroneous operation of an operation lever by making it impossible to mount the erroneous operation prevention device at any position other than an appropriate position.SOLUTION: An erroneous operation prevention device 1 includes a main body 10 having a front surface 1b and a rear surface 1c facing the front surface 1b, and a movable member 6. When the erroneous operation prevention device 1 is attached to an operation lever 100b in the OFF position, the movable member 6 does not protrude into a recess 5 and the operation lever 100b fits the recess 5. When the erroneous operation prevention device 1 is attached to an operation lever 100b in the ON position different from the OFF position, the movable member 6 protrudes into the recess 5 and prevents the operation lever 100b from entering the recess 5.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present disclosure relates to an erroneous operation prevention device for preventing erroneous operation of an operating lever of a breaker. [Background technology]

[0002] Japanese Utility Model Application Publication No. 59-118237 (Patent Document 1) discloses attaching an erroneous operation prevention cover to cover an operating lever of a breaker in order to prevent the erroneous operation of the operating lever. Japanese Patent Application Publication No. 2009-116020 (Patent Document 2) discloses an attachment tool for a tag indicating that operation is prohibited. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Utility Model Application Publication No. 59-118237 [Patent Document 2] JP 2009-116020 A Summary of the Invention [Problem to be solved by the invention]

[0004] The misoperation prevention cover disclosed in Patent Document 1 is made of transparent resin, so that the state of the operating lever can be confirmed, but it can be attached not only to the first position, which is the OFF position, but also to the second position, which is the ON position. The tag attachment tool of Patent Document 2, like Patent Document 1, is structurally capable of being attached to the operating lever in the ON position. For this reason, Patent Document 1 and Patent Document 2 are insufficient in terms of preventing electric shock during maintenance and preventing erroneous operation of the operating lever to prevent malfunction of the equipment.

[0005] An object of the present disclosure is to provide an erroneous operation prevention device that can reliably prevent erroneous operation of an operating lever by making it impossible to install the erroneous operation prevention device in any position other than an appropriate position. [Means for solving the problem]

[0006] The misoperation prevention device of the present disclosure is a misoperation prevention device for preventing misoperation of an operating lever of a breaker. The misoperation prevention device includes a main body having a first surface and a second surface opposing the first surface, and a movable member. A recess is formed on the second surface of the main body into which the operating lever fits when the operating lever is in a first position. The movable member is configured to be able to protrude into the recess. When the misoperation prevention device is attached to the operating lever in the first position, the movable member does not protrude into the recess and the operating lever fits into the recess, and when the misoperation prevention device is attached to the operating lever in a second position different from the first position, the movable member protrudes into the recess, thereby preventing the operating lever from entering the recess. Effect of the Invention

[0007] According to the present disclosure, erroneous operation of the operating lever can be reliably prevented. [Brief description of the drawings]

[0008] [Figure 1] FIG. 13 is a diagram showing a state in which an erroneous operation prevention device is attached to a breaker. [Diagram 2] FIG. 2 is a perspective view for explaining the operation error prevention device of the first embodiment. [Diagram 3] FIG. 2 is a perspective view of the operation error prevention device of the first embodiment, seen from the rear side. [Figure 4] 3 is a cross-sectional view taken along line AA in FIG. 2. [Diagram 5] 13 is a diagram showing how the misoperation prevention device is attached to a breaker. [Figure 6] 13 is a diagram showing how the misoperation prevention device is attached in the reverse direction to the breaker. [Figure 7] FIG. 13 is a diagram showing a state in which a card is attached to the erroneous operation prevention device. [Figure 8] FIG. 13 is a diagram showing a state in which a tag is attached to the misoperation prevention device. [Figure 9] FIG. 11 is a cross-sectional view for explaining an operation error prevention device according to a second embodiment. [Figure 10] FIG. 11 is a perspective view for explaining an erroneous operation prevention device according to a third embodiment. [Figure 11] FIG. 13 is a perspective view for explaining an erroneous operation prevention device according to a fourth embodiment. [Figure 12] FIG. 13 is a perspective view for explaining an erroneous operation prevention device according to a fifth embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, the embodiments of the present disclosure will be described in detail with reference to the drawings. In the embodiments described below, when numbers, amounts, etc. are mentioned, the scope of the present disclosure is not necessarily limited to the numbers, amounts, etc., unless otherwise specified. The same reference numbers are given to the same parts and corresponding parts, and duplicate descriptions may not be repeated. It is intended from the beginning that the configurations in the embodiments will be used in appropriate combination.

[0010] [Embodiment 1] Fig. 1 is a diagram showing a state in which the misoperation prevention device 1 is attached to the breaker 100, Fig. 2 is a perspective view for explaining the misoperation prevention device 1 of the first embodiment, Fig. 3 is a perspective view of the misoperation prevention device 1 of the first embodiment seen from the back side, Fig. 4 is a cross-sectional view taken along line AA in Fig. 2, Fig. 5 is a diagram showing how the misoperation prevention device 1 is attached to the breaker 100, and Fig. 6 is a diagram showing how the misoperation prevention device 1 is attached in the reverse direction to the breaker 100. When the X-axis, Y-axis, and Z-axis are defined as shown in Figs. 1 to 4, the X-axis direction is the left-right direction of the misoperation prevention device 1, the Y-axis direction is the front-rear direction of the misoperation prevention device 1, and the Z-axis direction is the up-down direction of the misoperation prevention device 1.

[0011] As shown in Fig. 1, the misoperation prevention device 1 can be attached to a breaker 100. The breaker 100 is shown in a schematic diagram. The misoperation prevention device 1 is made of resin. The misoperation prevention device 1 may be made of metal other than resin. As shown in Figs. 2 to 4, the misoperation prevention device 1 is formed in a rectangular parallelepiped shape having six sides.

[0012] 2 and 3, the main body 10 has a front surface 1b formed on an XZ plane as a first surface, and a rear surface 1c opposed to the front surface 1b as a second surface. The main body 10 has an upper surface 1a formed on an XY plane as a third surface perpendicular to the Z axis direction, and a lower surface 1d opposed to the upper surface 1a. The main body 10 has a right side surface 1e and a left side surface 1f formed on a YZ plane.

[0013] A wave-shaped groove 2 is formed on the top surface 1. As shown in FIG. 4, a cylindrical hole 2a is formed below the groove 2. The words "Do not operate" 3 are displayed prominently on the front surface 1b. The words "Do not operate" 3 are formed three-dimensionally, but may be displayed two-dimensionally. The content of the words 3 can be changed as appropriate and may be a symbol, a design, or a combination thereof.

[0014] As shown in Figures 3 and 4, a convex portion 4 protruding from the rear surface 1c is formed at an upper position of the rear surface 1c. A concave portion 5 extending toward the inside of the main body 10 is formed at a lower position of the rear surface 1c. A hollow portion 7 is formed below the concave portion 5. A movable member 6 capable of protruding into the concave portion 5 is disposed within the hollow portion 7.

[0015] The movable member 6 has a flange portion 6a formed at the lower position of the cylindrical main body. When the movable member 6 moves in the Z-axis direction, the movable range is limited by contact between the flange portion 6a and an upper surface portion 7a extending toward the inside of the hollow portion 7 or a lower surface portion 7b extending toward the inside of the hollow portion 7. The movable member 6 may have a main body in a rectangular parallelepiped shape, etc.

[0016] 5 shows the operating lever 100b, which is movable up and down relative to the breaker 100, facing diagonally downward, which is the OFF position. At this time, when attaching the operation prevention device 1 to the breaker 100, the operating lever 100b is fitted into the recess 5. When the operation prevention device 1 is attached to the operating lever 100b in the OFF position, the movable member 6 has moved into the hollow portion 7 due to gravity, so that the operating lever 100b fits into the recess 5.

[0017] When attaching the recess 5 to the operating lever 100b, the misoperation prevention device 1 is inserted so that the protrusion 4 engages with the breaker 100 by engaging it at the upper position of the rectangular cutout portion 100a formed in the breaker 100.

[0018] 6 shows the operating lever 100b facing diagonally upward, which is the ON position, with respect to the breaker 100. At this time, even if an attempt is made to fit the operating lever 100b into the recess 5, the movable member 6 protrudes vertically toward the recess 5 due to gravity, preventing the operating lever from entering the recess 5.

[0019] As shown in Fig. 6, when the erroneous operation prevention device 1 is attached to the operating lever 100b in the ON position, the characters 3 shown in Fig. 2 are displayed upside down. This makes it easy to recognize that the attachment position is incorrect based on the orientation of the characters.

[0020] In this way, even if an attempt is made to attach the erroneous operation prevention device 1 when the operating lever 100b is in the ON position, the operating lever will not enter the recess 5. This makes it possible to reliably prevent erroneous operation such as inspection with the operating lever 100b in the ON position.

[0021] Fig. 7 is a diagram showing a state in which the card 20 is attached to the misoperation prevention device 1. As shown in Fig. 7, the card 20 has a notice printed thereon, which makes it clear at a glance that an inspection is being performed, that operation is strictly prohibited, and the like. The card 20 is fixed in the groove 2 of the misoperation prevention device 1 by inserting the card 20 into the groove 2. The groove 2 is formed in a corrugated shape, so that the frictional force with the card 20 can prevent the card 20 from coming off the misoperation prevention device 1 due to wind or the like.

[0022] Fig. 8 is a diagram showing a state where the tag 30 is attached to the misoperation prevention device 1. As shown in Fig. 8, the tag 30 has a notice printed thereon, so that it is clear at a glance that an inspection is being performed, that operation is strictly prohibited, etc. The tag 30 is inserted into the groove 2 of the misoperation prevention device 1, and the string 30a for suspending the tag 30 is hooked into the hole 2a, so that the tag 30 is suspended from the groove 2. This makes it possible to prevent the tag 30 from coming off the misoperation prevention device 1 due to wind or the like.

[0023] The card 20 and tag 30 shown in Figures 7 and 8 may be used at the same time. The string 30a may be made longer so that the characters 3 of "operation prohibited" are easily visible. The card 20, tag 30, and characters 3 can effectively prevent erroneous operation.

[0024] [Embodiment 2] 9 is a cross-sectional view for explaining the misoperation prevention device 11 of the embodiment 2. The misoperation prevention device 1 of the embodiment 1 is attached when the operation lever 100b that is movable up and down with respect to the breaker 100 is in the OFF position. In contrast, the misoperation prevention device 11 of the embodiment 2 is attached when the operation lever 100b that is movable up and down with respect to the breaker 100 is in the ON position.

[0025] As shown in FIG. 9, a recess 15 extending toward the inside of the main body 10 is formed at an upper position of the rear surface 1c. A hollow portion 17 is formed in the main body 10 below the recess 15. A movable member 16 capable of protruding into the recess 15 is disposed in the hollow portion 17. It is preferable not to form a protrusion protruding from the rear surface 1c on the rear surface 1c of the misoperation prevention device 11 of the second embodiment. This is to prevent the protrusion from interfering with tripping when the breaker 100 is activated by an overcurrent or the like and the power is cut off (tripped). However, a protrusion may be formed at a position that does not overlap with the movable range of the operating lever 100b.

[0026] A flange portion 16a is formed around the cylindrical main body of the movable member 16. When the movable member 16 moves, the flange portion 16a comes into contact with an upper surface portion 17a extending toward the inside of the hollow portion 17 or a lower surface portion 17b extending toward the inside of the hollow portion 7, thereby restricting the movable range of the movable member 16.

[0027] When attaching the erroneous operation prevention device 11 to the operating lever 100b facing diagonally upward, which is the ON position of the breaker 100, the operating lever 100b is fitted into the recess 15. When the erroneous operation prevention device 11 is attached to the operating lever 100b in the ON position, the movable member 16 moves due to gravity to a position where it does not protrude into the recess 15, so that the operating lever 100b fits into the recess 15.

[0028] The erroneous operation prevention device 11 is attached to the operating lever 100b facing diagonally downward, which is the OFF position for the breaker 100. In this case, even if an attempt is made to fit the operating lever 100b into the recess 15, the movable member 16 protrudes vertically toward the recess 15 due to gravity, preventing the operating lever from entering the recess 15.

[0029] In this way, even if an attempt is made to attach the erroneous operation prevention device 11 when the operating lever 100b is in the OFF position, the operating lever will not enter the recess 15. This makes it possible to reliably prevent an erroneous operation in which the operating lever 100b is attached in the OFF position when it is desired to fix the operating lever 100b in the ON position.

[0030] [Embodiment 3] 10 is a perspective view for explaining an operation error prevention device 21 according to embodiment 3. The operation error prevention device 21 according to embodiment 3 has a different shape of the upper surface from the operation error prevention device 1 according to embodiment 1, but the other shapes are the same. The upper surface 21a of the operation error prevention device 21 is different from the upper surface 1a of the operation error prevention device 1 in that the groove portion 2 is not formed.

[0031] [Embodiment 4] 11 is a perspective view for explaining an operation error prevention device 31 according to embodiment 4. The operation error prevention device 31 according to embodiment 4 has a different shape of the upper surface from the operation error prevention device 1 according to embodiment 1, but the other shapes are the same. The upper surface 31a of the operation error prevention device 31 is different from the upper surface 1a of the operation error prevention device 1 in that two grooves 32 and 33 are formed therein.

[0032] The tag 30 is hung from the groove 32 on the rear side by hooking the string 30a shown in Fig. 8 into the hole 32a. The card 20 shown in Fig. 7 is fixed in the groove 33 on the front side by inserting the card 20. The card 20 is prevented from falling out by contacting the step 33a as shown on the right side surface 1e, and the entering card 20 is stopped by the hole 33b at the lower position.

[0033] [Embodiment 5] FIG. 12 is a perspective view for explaining the misoperation prevention device 41 of the fifth embodiment. The misoperation prevention device 41 of the fifth embodiment is different from the misoperation prevention device 31 of the fourth embodiment in the shape of the rear groove, but the other shapes are the same. The rear groove 42 is designed so that the tag 30 can be hung from the groove 42 by hooking the string 30a shown in FIG. 8 into the hole 42a. The rear groove 42 has a wave-shaped shape, so that the card 20 shown in FIG. 7 can be inserted and fixed. The misoperation prevention device 41 can also be used by inserting the card 20 into both the front groove 33 and the rear groove 42.

[0034] [summary] The present disclosure relates to a misoperation prevention device 1 for preventing misoperation of an operating lever 100b of a breaker 100. The misoperation prevention device 1 includes a main body 10 having a front surface 1b and a rear surface 1c facing the front surface 1b, and a movable member 6. A recess 5 is formed on the rear surface 1c of the main body 10, into which the operating lever 100b fits when the operating lever 100b is in the OFF position. The movable member 6 is configured to be able to protrude into the recess 5. When the misoperation prevention device 1 is attached to the operating lever 100b in the OFF position, the movable member 6 does not protrude into the recess 5, and the operating lever 100b fits into the recess 5. When the misoperation prevention device 1 is attached to the operating lever 100b in the ON position different from the OFF position, the movable member 6 protrudes into the recess 5, thereby preventing the operating lever 100b from entering the recess 5.

[0035] By providing such a configuration, erroneous operation of the operating lever 100b can be reliably prevented.

[0036] Preferably, when the erroneous operation prevention device 1 is attached to the operating lever 100b in the ON position, the movable member 6 protrudes vertically due to gravity.

[0037] By providing such a configuration, it is possible to reliably prevent erroneous operation of the operating lever 100b with a simple structure.

[0038] Preferably, the main body 10 has a protrusion 4 protruding from the rear surface 1c. When the misoperation prevention device 1 is attached to the operating lever 100b in the OFF position, the operating lever 100b fits into the recess 5, and the protrusion 4 engages with the breaker 100.

[0039] With this configuration, the projection 4 and the recess 5 allow the misoperation prevention device 1 to be attached firmly to the breaker 100 .

[0040] Preferably, a groove 2 for attaching a card 20 or a tag 30 for calling attention is formed on the upper surface 1a perpendicular to the vertical direction.

[0041] With this configuration, a card 20 or a tag 30 can be attached to the groove 2 to call attention.

[0042] Preferably, the grooves 2 are formed in a wave shape.

[0043] With this configuration, the card 20 or the tag 30 can be prevented from falling due to wind or the like.

[0044] Preferably, the first surface displays the character 3. The character 3 is displayed so that the character 3 is upside down when the erroneous operation prevention device 1 is attached to the operating lever 100b in the ON position.

[0045] By providing such a configuration, it is possible to easily recognize that the installation position is incorrect by the orientation of the characters.

[0046] [Variations] The shape of the main body 10 may be a shape other than a rectangular parallelepiped. For example, the main body 10 may be triangular or trapezoidal so that the user can easily recognize the up and down directions.

[0047] The movable member 6 has been described as falling due to gravity. The movable member 6 may be manually moved by the user to a position where the operation lever 100b cannot enter.

[0048] The above description has been given of the erroneous operation prevention device 1 that is attached to an object in which the operating lever 100b moves in the up and down direction. The erroneous operation prevention device 1 may also be attached to an object in which the operating lever 100b moves in the left and right direction.

[0049] The embodiments disclosed herein should be considered to be illustrative and not restrictive in all respects. The scope of the present disclosure is defined by the claims, not the above description, and is intended to include all modifications within the meaning and scope of the claims. [Explanation of symbols]

[0050] 1 Misoperation prevention device, 1a top surface, 1b front surface, 1c rear surface, 1d bottom surface, 1e right side surface, 1f left side surface, 2 groove portion, 2a hole portion, 3 letters, 4 convex portion, 5 concave portion, 6 movable part, 6a flange portion, 7 hollow portion, 7a top surface portion, 7b bottom surface portion, 10 main body, 20 card, 30 tag, 30a string portion, 100 breaker, 100a notch portion, 100b operating lever.

Claims

1. An erroneous operation prevention device for preventing erroneous operation of a breaker operating lever, The erroneous operation prevention device is a body having a first surface and a second surface opposite the first surface; A movable member, a recess into which the operating lever is fitted when the operating lever is in a first position is formed on the second surface of the main body, The movable member is configured to be able to protrude into the recess, When the erroneous operation prevention device is attached to the operating lever in the first position, the movable member does not protrude into the recess, and the operating lever fits into the recess, When the misoperation prevention device is attached to the operating lever in a second position different from the first position, the movable member protrudes into the recess, thereby preventing the operating lever from entering the recess.

2. The misoperation prevention device according to claim 1 , wherein the movable member protrudes vertically due to gravity when the misoperation prevention device is attached to the operating lever in the second position.

3. The main body has a protrusion protruding from the second surface, 3. The misoperation prevention device according to claim 1, wherein when the misoperation prevention device is attached to the operating lever in the first position, the operating lever fits into the recess and the protrusion engages with the breaker.

4. The misoperation prevention device according to claim 1 , wherein a groove for attaching a card or tag for calling attention is formed on a third surface perpendicular to the vertical direction.

5. The misoperation prevention device according to claim 4 , wherein the groove portion is formed in a wave shape.

6. The first surface has characters displayed thereon, The misoperation prevention device according to claim 1 , wherein the letters are displayed upside down when the misoperation prevention device is attached to the operating lever in the second position.

7. The misoperation prevention device according to claim 1 , wherein the first position is a position where the breaker is turned OFF.

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