JP2007317625A - Display fixture for misoperation prevention, and switch - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a misoperation preventing fixture for preventing misoperations of a handle due to human errors. <P>SOLUTION: At the operation of inspection of an apparatus, when a handle 13 is turned to a lowermost part of a guide groove 12a, to make a circuit go into open state, a user attaches both end parts 22, 23 of a misoperation preventing fixture 20 to grooves 12b provided on both sides of a casing 12, respectively. The misoperation preventing fixture 20 locks the turning in the upward direction, by locking an upper part of the handle 13. A display part 21 is also provided on the wrong operation prevention fixture 20, an operating state and the purpose of operation of the handle 13 are displayed on the display part 21. Thus, since the misoperation prevention fixture 20 is attached on both sides of the casing 12, turning in the opposite direction to the handle 13 will be locked; and the operation state and the operation purpose will be displayed, the possibility of the handle 13 being misoperated by some other persons is reduced during the operation of the user. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an erroneous operation preventing tool for preventing an erroneous operation of a handle portion, and a switch provided with the erroneous operation preventing tool.

  Specifically, the present invention is formed in a substantially U shape, and both ends are detachably attached to both side surfaces of the main body of the switch so as to be positioned on the rotation path of the handle, thereby This is related to an operation error prevention tool that locks the rotation in the opposite direction to prevent erroneous operation of the handle portion due to human error.

  In addition, the reverse of the handle portion is obtained by rotating the substantially U-shaped erroneous operation prevention tool whose both end portions are attached to the main body portion so as to be positioned on the rotation path of the handle portion. The present invention relates to a switch that locks the rotation of the direction and prevents an erroneous operation of the handle portion due to a human error.

  When performing work such as equipment inspection, the operator (hereinafter referred to as the user) must use a switch (in this case, a circuit breaker) that controls the work equipment so that the work equipment does not operate and an accident occurs. Opened.

  The switch is provided with a handle portion. This handle is operated by the user to open and close the electric circuit. For example, the handle portion is switched in the open / close state of the electric circuit by being pivoted in the vertical direction. For example, when the handle portion is turned downward, the electric circuit is in an open state, and when the handle portion is turned upward, it is switched to a closed state.

  Conventionally, when the user works, the handle is rotated downward and switched to the open state, and then a vinyl tape is attached to the handle so that the handle is not accidentally operated by another person. A tag indicating that the handle is locked is attached beside the switch.

  However, if there are more than 20 switches that are opened during the work, for example, it takes time to attach vinyl tape to each handle part and attach the bill, and the work is long. Over a period of time, the adhesive strength of the vinyl tape decreased and sometimes peeled off.

  Therefore, conventionally, in order to prevent erroneous operation of the handle portion of the switch, as shown in Patent Document 1, both ends of the handle lock member made of a deformable synthetic resin are deformed to form an insertion port. In addition, a handle lock device has been devised that locks the handle portion by inserting the handle portion into the insertion port, thereby reducing the load during attachment and detachment and preventing erroneous operation during attachment and detachment.

Japanese Utility Model Publication No. 05-75945

  However, since the handle lock device described in Patent Document 1 had to be inserted after the handle member had to be deformed by strongly pressing both ends of the handle portion each time it was used, it was inserted by repeating the use. The mouth may be deformed or cracked. Further, in order to make it difficult to come off the handle member, it must be formed of a hard material that is difficult to deform, and a strong force is required when forming the insertion opening.

  In addition, since the handle portion is locked by inserting the handle portion into the insertion port in which the handle lock member is deformed, the handle portion cannot be used for a switch having a different shape.

  The object of the present invention is not to be influenced by the frequency of use as described above, and provides an operation error prevention tool that can surely prevent an erroneous operation of the handle part due to a human error regardless of the shape of the handle part. There is to do.

The concept of this invention is
The main body,
In the switch provided with a handle part that is provided rotatably in the main body part and opens and closes the electric circuit by being rotated,
It is formed in a substantially U shape and has locking portions at both ends, and the both ends are attached to and detached from both side surfaces of the main body by the locking portions so as to be positioned on the rotation path of the handle portion. By being freely attached, there is provided an erroneous operation preventing tool that locks the rotation of the handle portion in the reverse direction.

  In this invention, the misoperation prevention tool is attached to a switch (blade type switch). This switch is, for example, a circuit breaker that opens and closes an electric circuit connecting wiring and a predetermined device. A handle portion that is operated by a user and opens and closes an electric circuit is rotatably connected to the switch.

  The erroneous operation preventing tool of the present invention is formed in a substantially U-shape. Both ends of the erroneous operation preventing tool are detachably attached to both side surfaces of the main body. Further, both end portions are provided with locking portions that prevent both end portions from falling off from both side surfaces of the main body portion.

  For example, the locking portions are connected to both ends, and grooves corresponding to the shapes of the locking portions are provided on both side surfaces of the main body. If the user fits both end portions into these grooves during use, the both end portions can be firmly fixed to both side surfaces of the main body portion, and the possibility that the erroneous operation preventing tool will fall off can be reduced.

  In addition, when the main body is formed of a magnetic material, if the magnets as the locking portions are attached to the contact surfaces of the main body at both ends, the both ends of the main body can be made using the magnet's adsorption force. The possibility of falling off from both sides of the can be reduced.

  Furthermore, at least both ends of the erroneous operation prevention tool are formed of a shape memory material such as synthetic resin, and the both ends are inward by a predetermined angle (for example, about 5 °) so as to give an inward biasing force. If formed in an inclined shape, the possibility of falling off when attached to the main body can be further reduced.

  When performing work such as equipment inspection, when the handle portion rotates, for example, in the vertical direction, the user rotates it downward to open the electric circuit. After that, if the user attaches the erroneous operation prevention tool to the grooves provided on both side surfaces of the main body part and locks the upper part of the handle part, the user can rotate the handle part in the reverse direction, that is, upward. It can be locked easily. Accordingly, it is possible to reduce the error of the handle portion due to the human error, that is, the human error, during the operation of the device inspection by the user.

  Moreover, you may provide a display part in the external side surface of this erroneous operation prevention apparatus. The display unit displays, for example, at least an operation state of the handle unit, that is, whether the electric circuit is in an open state or a closed state. Further, in addition to the operation state, an operation purpose for locking the handle portion, for example, work contents may be displayed on the display portion. The user can easily notify other persons of the operation state and the operation purpose by selecting and attaching the erroneous operation prevention tool provided with the display unit according to the operation state and the operation purpose as described above. It is possible to more reliably prevent erroneous operation of the handle portion due to human error.

  Generally, the width of the switch is manufactured based on a common standard, although there is a difference of about 1 mm depending on the manufacturer. As described above, since both end portions of the erroneous operation preventing tool are formed of a shape memory material, it is possible to cope with such a slight difference in width, so that it can be attached to any switch.

  Therefore, for example, the display unit is formed so as to be erasable by using a whiteboard so that the user can write the operation state and the operation purpose at the time of the work, or the sticker, magnet indicating the operation state and the operation purpose By creating a sticker in advance and selecting a sticker or magnetic sticker suitable for the operating state and purpose of operation every time the user performs work, the user can select the correct operation prevention tool without selecting a switch. It can be reused in any application and any number of times.

  In the above description, the erroneous operation prevention tool is attached to the switch by the user at the time of use, but may be attached to the switch in advance. At this time, both end portions of the erroneous operation preventing tool are rotatably attached to the main body portion. When the handle portion is rotated and the electric circuit is in an open state, the erroneous operation preventing tool is rotated to the position above the handle portion on the rotation path of the handle portion to lock the reverse rotation of the handle portion. . In this case, if the display unit of the erroneous operation prevention tool is formed so as to be erasable as described above, or if a seal or a magnetic sticker is formed so as to be detachable, the erroneous operation prevention tool can be attached and detached in this way. If it is not possible, it can be reused over and over again.

  According to this invention, both ends are detachably attached to both side surfaces of the main body of the switch so as to be positioned on the rotation path of the handle portion, or are rotatably attached to both side surfaces of the main body. The erroneous operation prevention tool is rotated so as to be positioned on the rotation path of the handle part, thereby locking the reverse rotation of the handle part and preventing an erroneous operation of the handle part due to a human error. it can.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 is a diagram showing an erroneous operation preventing device 20 and an opening / closing device 10 to which the erroneous operation preventing device 20 is attached as an embodiment of the present invention. In addition, the switch 10 shown in FIG. 1 has shown the case where a blade type switch is used as a circuit breaker for opening and closing the electric circuit which connects wiring and a predetermined apparatus (not shown).

  As shown in FIG. 1, the main body 11 of the switch 10 is housed in a casing 12. The casing 12 is provided with a pair of guide grooves 12 a in the vertical direction along the longitudinal direction of the casing 12. Although not shown, the main body 11 is provided with contacts (rotating contacts and fixed contacts) for opening and closing the electric circuit, and the handle 13 connected to the main body 11 shown in FIG. This is for operating an opening / closing mechanism that opens and closes the electric circuit by contacting and separating. The handle 13 and the arm part 131 constitute a handle part.

  As shown in FIG. 1, the arm 131 protrudes outward from a guide groove 12 a provided in the casing 12. The handle 13 is configured to be rotatable in the vertical direction when the arm portion 131 is rotated along the inner side surface of the guide groove 121. By turning the handle 13 in the vertical direction, the connection or disconnection of the contacts is operated, and the electric circuit is switched to the closed state or the open state.

  In the switch 10, as shown in FIG. 1, when the handle 13 is positioned at the uppermost part of the guide groove 121, the contact is connected and the electric circuit is closed, as shown in FIG. 4 described later. In addition, when the handle 13 is located at the lowermost part of the guide groove 12a, the contact is released and the electric circuit is open.

  Grooves 12b for attaching both end portions 22 and 23 of the erroneous operation preventing tool 20 are respectively provided at opposite positions on both side surfaces of the casing 12. As will be described later with reference to FIG. 4, when the handle 13 is operated in the open state and the groove 12 b is positioned at the lowermost part of the guide groove, the erroneous operation preventing tool 20 is on the rotation path of the handle 13. It is provided in the location shown in FIG. 1 so that it may be located in the upper part. Each of the grooves 12b is formed in a shape corresponding to the locking portions 222 and 232 so that the locking portions 222 and 232 connected to the both end portions 22 and 23 can be fitted.

  The erroneous operation preventing tool 20 is formed in a substantially U shape, and the length of the arrow a shown in FIG. 1, that is, the width of the erroneous operation preventing tool 20 is formed to a length corresponding to the width of the casing 12. . Further, the erroneous operation preventing tool 20 is formed of a synthetic resin that is a shape memory material capable of elastic deformation.

  FIG. 2 is a top view of the erroneous operation preventing tool 20. As shown in FIG. 2, both end portions 22 and 23 of the erroneous operation preventing tool 20 are inclined inward by a predetermined angle, for example, 5 °. In this way, when the locking portions 222 and 232 are respectively attached to the grooves 12b, the both end portions 22 and 23 give an inward biasing force to the casing 12, so that falling off can be prevented.

  In general, although the width of the switch, that is, the width of the casing 12 varies by about 1 mm depending on the manufacturer, the products of any manufacturer are manufactured based on a common standard. As described above, since the erroneous operation preventing tool 20 is formed of a synthetic resin that can be elastically deformed, a difference in width of about 1 mm can be easily dealt with. Therefore, the erroneous operation preventing tool 20 can be used for any switch, and the shape of the handle need not be limited to the shape of the handle 13 shown in FIG.

  Returning to FIG. 1, a display unit 21 is provided on the surface of the erroneous operation preventing tool 20. The display unit 21 displays a display indicating an operation state and an operation purpose, for example, “locked to an OFF state during work”.

  Further, it is convenient if the display unit 21 is formed so as to be erasable. FIG. 3 is a diagram showing an erroneous operation preventing tool 20 provided with a display unit 21 that can be rewritten. A whiteboard is attached to the external side surface of the misoperation prevention device 20, and the display unit 21 is formed so as to be erasable, so that the user writes and erases the operation state and the operation purpose using the whiteboard marker each time work is performed. Then, it can be used any number of times for any purpose. Further, by forming such a erasable manner as described above, it is possible to display detailed information such as work date and time as shown in FIG.

  Further, although not shown, a magnet or a sticker on which an operation state or an operation purpose is printed in advance may be created, and the user may stick or peel it off at every work. In addition, when sticking a magnet, the external side surface of the misoperation prevention tool 20 is formed with a magnetic material.

  Next, returning to FIG. 1, a method of using the erroneous operation preventing tool 20 will be described. For example, when the user performs an inspection work on a device connected to the switch 10, the user turns the handle 13 to the lowest part of the guide groove 12a to open the electric circuit in order to prevent an electric shock. Then, the locking portions 222 and 232 of the erroneous operation preventing tool 20 are fitted into the grooves 12b, respectively.

  FIG. 4 is a view showing the switch 10 to which the erroneous operation preventing tool 20 is attached. As shown in FIG. 4, the erroneous operation preventing tool 20 is positioned at the upper part of the handle 13 on the rotation path of the handle 13 by attaching the locking portions 222 and 232 to the groove 12b. Lock the direction (upward) rotation. Moreover, as shown in FIG. 4, since the display unit 21 is provided in the erroneous operation preventing tool 20, the operation state and the operation purpose can be notified to other persons. As described above, it is possible to prevent the error of the other person, that is, the erroneous operation of the handle 13 due to the human error while the user is working.

  FIG. 5 is a diagram showing a switch 10A provided with an erroneous operation preventing tool 20A according to the second embodiment. FIG. 6 is a top view of the misoperation preventing tool 20A. Next, referring to FIG. 5 and FIG. 6, a switch 10 </ b> A provided with an erroneous operation preventing tool 20 </ b> A and an erroneous operation preventing tool 20 </ b> A as a second embodiment of the present invention will be described.

  Since the configuration of the main body 11, the casing 12, the guide groove 12a, the handle 13, and the arm 131 of the switch 10A shown in FIG. 5 and the operation of the handle 13 are the same as those of the switch 10 described above, the description thereof is omitted.

  On both side surfaces of the casing 12, storage portions 14 are attached using bolt members 15 and nuts 16 at positions facing each other. Although a detailed configuration will be described later with reference to FIG. 6, the storage portion 14 can be rotated in the vertical direction with the bolt member 15 as a rotation axis. Moreover, the accommodating part 14 is formed in the cylinder shape corresponding to the shape of both ends 22a and 23a, respectively so that both ends 22a and 23a of 20 A of misoperation prevention tools can be accommodated.

  As shown in FIGS. 5 and 6, the erroneous operation preventing tool 20 </ b> A is formed in a substantially U-shape corresponding to the width of the casing 12 and elastically deformed, like the erroneous operation preventing tool 20 described above. It is made of a possible shape memory material, for example, a synthetic resin.

  Also, as shown in FIG. 6, both end portions 22 a and 23 a of the erroneous operation preventing tool 20 </ b> A are inclined inward by a predetermined angle in the same manner as the erroneous operation preventing tool 20, and when attached to the storage portion 14, An urging force is applied inward to the casing 12 to prevent the casing 12 from falling off.

  FIG. 7 is a view showing the end portion 23 of the erroneous operation preventing tool 20 </ b> A attached to the storage portion 14. As shown in FIG. 7, a bolt member 15 is attached to the side surface of the casing 12, and fitting portions 142 and 143 for fitting the bolt member 15 are provided in the storage portion 14. The fitting portion 142 and 143 are fitted with the screw portion 15a of the bolt member 15 in this order, and the screw portion 15a protruding from the fitting portion 143 is tightened with the nut 16, whereby the storage portion 14 causes the bolt member 15 to be A rotary shaft is attached so as to be rotatable in the vertical direction.

  In addition, since the structure of the storage part 14 attached to the opposite side surface of the casing and the end part 22 stored in the storage part 14 is the same as that of the end part 23 and the storage part 14 shown in FIG. The description is omitted.

  By storing the both end portions 22a and 23a in the storage portion 14 that is rotatably attached to the casing 12 in this manner, the erroneous operation preventing tool 20A can be rotatably attached to both side surfaces of the casing 12.

  As shown in FIGS. 6 and 7, three concave portions 221 a and 231 a are provided at predetermined intervals on the contact surface of the misoperation preventing tool 20 </ b> A with the casing 12. Further, as shown in FIG. 7, the storage portion 14 is provided with a convex portion 144 corresponding to the concave portion 231a provided in the end portion 23a.

  At the time of use, the user deforms both end portions 22a and 23a inclined inward in the outward direction against the urging force, and slides them by pushing or pulling them back and forth in the direction of the arrow shown in FIG. If the convex portion 144 is fitted into the appropriate concave portions 221a and 231, positioning can be easily performed. For example, in FIG. 5, the convex part 144 is in a state of being fitted into the first concave parts 221a and 231a from the end.

  Further, as shown in FIGS. 6 and 7, even if the engaging portions 222a and 232a are connected to the both end portions 22a and 23a, the convex portion 144 may come out of the concave portions 221a and 231a. Since the locking portions 222a and 232a are caught by the convex portion 144, the falling off of the both end portions 22 and 23 can be further prevented.

  Next, a method of using the erroneous operation preventing tool 20A will be described. When not in use, the erroneous operation preventing tool is rotated so as to be positioned below the casing 12 so as not to hinder the rotation of the handle 13 as shown in FIG. As shown in FIG. 8, the user rotates the handle 13 to the lowermost part of the guide groove 12a at the time of equipment inspection or the like to open the electric circuit. Then, the erroneous operation preventing tool 20A in which both end portions 22a and 23a are housed in the housing portion 14 is rotated upward about the bolt member 15 to the upper position of the handle 13, and then the both end portions 22a and 23a are moved. By sliding in the insertion direction, the convex portion 144 is fitted into an appropriate concave portion 221a (in this case, the third concave portions 221a and 231a from the end).

  FIG. 8 is a view showing the switch 10 with the handle 13 locked using the erroneous operation preventing tool 20A. As described above, since the erroneous operation preventing tool 20A is locked so as to press the upper portion of the handle 13, the upward rotation of the handle 13 is easily locked.

  Also, as shown in FIG. 8, the display unit 21 of the erroneous operation prevention tool 20A displays “working and locked to OFF”, so that it is possible to notify the person other than the user of the operation state and the operation purpose. And erroneous operation of the handle 13 due to a human error can be prevented.

  In this case, the display unit 21A is formed so as to be erasable using a whiteboard or the like as described above. In this way, the display unit 21A can be used any number of times.

  Further, since the erroneous operation preventing tool 20A is rotatably attached to the casing 12, it can lock the rotation of the handle 13 not only when the electric circuit is in the open state but also when the electric circuit is in the closed state. FIG. 9 is a view showing the switch 10A when the handle 13 is rotated to the top of the guide groove 12a and the electric circuit is locked in the closed state by the erroneous operation preventing tool 20A.

  As shown in FIG. 9, the user can lock the downward rotation of the handle 13 by causing the erroneous operation preventing tool 20 </ b> A to rotate to a position below the handle 13. At this time, the convex portions 144 provided in the storage portion 14 are fitted into the second concave portions 221a and 231a from the end portions, respectively.

  Further, by displaying “currently energized” on the display unit 21 of the erroneous operation preventing tool 20A, as in the case shown in FIG. There is no risk of incorrect operation in the downward direction.

  In the first and second embodiments described above, both ends are inclined inward as shown in FIG. 2 in order to prevent the accidental operation prevention tools 20 and 20A from falling off. However, when the casing 12 is made of a magnetic material instead, the magnets are attached to the contact surfaces of the two end portions 22, 23, 22a, and 23a with the casing 12, as shown in FIG. In this case, the possibility of falling off can be prevented by using the attractive force of the magnet.

  In the second embodiment described above, both end portions 22a and 23a are attached to the storage portion 14 in advance. However, the erroneous operation preventing tool 20A is attached to the storage portion 14 of the switch 10A each time it is used. It is good also as a detachable structure which attaches.

  The present invention is used when locking the reverse rotation of the handle portion during work such as equipment inspection, and erroneous operation of the handle portion of the blade-type switch that opens and closes the electric circuit by rotating the handle portion. Can be used for prevention.

It is the figure which showed the misoperation prevention tool 20 and the switch 10 as 1st Embodiment. 4 is a top view of the misoperation prevention tool 20. FIG. It is the figure which showed the misoperation prevention tool 20 provided with the display part 21 which can be rewritten. It is the figure which showed the switch 10 with which the erroneous operation prevention tool 20 was attached. It is the figure which showed switch 10A provided with 20 A of misoperation prevention tools as 2nd Embodiment. It is the figure which showed the top view of 20 A of misoperation prevention tools. It is the figure which showed the misoperation prevention tool 20 attached to the accommodating part 14. FIG. It is the figure which showed switch 10A when an electric circuit is locked in an open state using 20A of misoperation prevention tools. It is the figure which showed switch 10A when an electric circuit is locked in a closed state using 20A of misoperation prevention tools. It is the figure which showed the misoperation prevention tool 20 with which the magnet was attached to both ends 22,23.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10,10A ... Switch, 11 ... Main-body part, 12 ... Casing, 12a ... Guide groove, 12b ... Groove, 13 ... Handle, 131 ... Arm part, 14. ..Storage part 141... Opening part 142 143... Fitting part 144 .. Projection part 15... Bolt member 15a... Screw part 16. , 20A ... erroneous operation prevention device, 21, 21A ... display unit, 22, 22a, 23, 23a ... end, 221a, 231a ... recess, 222, 222a, 232, 232A ... Stop

Claims (5)

The main body,
In the switch provided with a handle part that is provided rotatably in the main body part and opens and closes the electric circuit by being rotated,
It is formed in a substantially U shape and has locking portions at both ends, and the both ends are attached to and detached from both side surfaces of the main body by the locking portions so as to be positioned on the rotation path of the handle portion. A misoperation prevention tool characterized by locking the rotation of the handle portion in the reverse direction by being freely attached. The erroneous operation preventing tool according to claim 1, wherein the both end portions are inclined inward by a predetermined angle. The misoperation prevention tool according to claim 1, wherein a display portion indicating at least an operation state of the handle portion is provided on an external side surface. 4. The erroneous operation preventing tool according to claim 3, wherein the display section can be freely rewritten. The main body,
A handle part that is rotatably provided in the main body part and opens and closes an electric circuit by being rotated,
A switch comprising an erroneous operation prevention tool formed in a substantially U-shape and having both end portions rotatably attached to both side surfaces of the main body portion,
The switch is characterized in that the erroneous operation preventing tool is rotated to a position on a rotation path of the handle portion to lock the rotation of the handle portion in the reverse direction.

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