JP2009059639A5 - - Google Patents

Description

Breaker lockout

The present invention relates to a lockout device that is used by being attached to a breaker in order to prevent an unexpected accident during electrical work.

When electrical work is performed, the breaker is cut for the purpose of preventing electric shock. At this time,
If this breaker is connected to another person, there is a risk that a construction worker may be involved in an unexpected electric shock. For this reason, when a breaker is usually cut,
The breaker switch knob cannot be moved so that it cannot be connected, and a lock that cannot be removed by anyone other than construction workers is used. A lockout tool is used at this time.
Conventionally, as what is used for this purpose, Patent Document 1 discloses a breaker using a forward / reverse switch, which is a countermeasure taken by the breaker itself.
JP 07-2111216

FIG. 7 is a perspective view showing the external shape of a breaker generally used in the industry. On the breaker 700, there is a switch knob 702 and a switch frame 701 that supports the switch knob 702. The switch knob 702 is turned on (connected) when tilted upward and turned off (disconnected) when tilted down. The contacts of the internal electric circuit are connected or disconnected. Generally, the switch knob 702 has a concave portion 708 due to an arc shape for tilting (rotating), and the switch frame 701 has vertical surfaces 707 on the top and bottom and both sides because of the rectangular shape. . In general, there are many depressions 703 and 706 on the upper and lower sides. Note that an upper surface portion 709 and a lower surface portion 710 of the switch knob 702 are shown. Some switch knobs 702 have hollow portions or holes 711.
At the time of construction, it is often the case that a warning message “Don't switch on during construction” is used to call attention. FIG. 6 is a diagram showing a conventional lockout device that is already on the market. Next, the function of this type of lockout tool 600 will be described.

6-B shows a state in which the lockout tool 600 is attached to the breaker 700. 6-A, the lockout tool 600 has a “U” -shaped recess 601 into which the switch knob 702 is fitted. There is a screw 602. When the screw 602 is turned and tightened, the tip 603 of the screw hits and presses against the upper surface portion 709 of the switch knob 702 so that it is fixed. After the screw 602 is tightened, it can be bent at the bent portion 604 of the screw 602. The bent screw 602 is accommodated in the groove 605. The lockout device 600 has a lock attaching portion 606 for applying a lock, and a lock attaching hole 607 is provided there. When the lock is passed through the two lock holes 607 and locked, the lock becomes in the way and the screw 602 cannot be turned.
The lockout tool 600 cannot be removed except by a construction worker having a key. Therefore, the switch knob 702 cannot be moved. When work is done at multiple locations under one breaker, and there are construction workers corresponding to the number, a lock is applied to the lock attachment portion 606, and a plurality of locks are attached exclusively to the construction worker. Become. Even if one construction worker finishes the work and removes his lock, if the lock of another person remains, the lock will not open and the breaker switch knob cannot be moved. Everyone's lock is released and the breaker switch knob can be moved. In this way, the safety against electric shock accidents of the electrician is ensured.

By the way, the lockout device 600 has a great drawback. The certainty of fixing the lockout tool 600 depends on the contact between the tip 603 of the screw 602 and the upper surface portion 709 of the switch knob. Because of the point-like contact, it must be closed tightly to make sure it is fixed,
Then, the upper surface portion 709 of the switch knob is damaged, which is not preferable. Further, the point-like contact easily rotates, and the upper surface portion 709 of the switch knob is slightly inclined, so that the screw 602 is easily loosened. For this reason, if the switch knob 702 is moved in its entirety with the lockout tool 600 attached, the switch knob 702 moves completely or about half, which is not safe. In addition, there is a drawback that the lockout tool 600 comes off due to an impact such as a collision from the side, and there is a demand for a fixed lockout tool.

In view of the above circumstances, the problem to be solved is to provide a lockout device that is attached to a breaker, has good operability of attachment / detachment, does not damage the switch knob, and is securely fixed.

As means for solving the above-mentioned problems, the breaker lockout device according to the present invention is characterized by a groove, a side surface, a surface, a recess around the switch knob of the breaker, and a hollow hole in the switch knob. Is used to securely fix the breaker lockout tool to the breaker, and will be described in the following claims.

The invention according to claim 1 is a breaker lockout device attached to the breaker in order to limit unexpected ON / OFF of the breaker by a person other than a predetermined worker,
There is a knob part for pressing the clothespin, a rotation center part connected to the knob part, a scissor part connected to the knob part, and an elastic body part for returning the knob part, and one of the scissor parts is A switch insertion groove which can be inserted so as to fit the switch knob of the breaker, and the other of the scissors is a plurality of movable pins for fitting into a hollow part or a hole attached to the switch knob of the breaker, and the plurality of the pin And a cushion part for moving the movable pin according to the presence or absence of a pressing pressure. As a result, suction fixation and other fixations can be used together, and reliable fixation can be achieved.

According to a second aspect of the present invention, in the lockout device for a breaker according to the ninth aspect, there is provided a lock attachment portion having a lock attachment hole for attaching a lock for fixing both of the scissors portions so as not to be movable. It is provided. As a result, it is possible to eliminate the worry that the lockout is broken by other workers.

According to a third aspect of the present invention, in the circuit breaker lockout device according to the first or second aspect, another switch insertion groove into which the switch knob of another size is fitted on the opposite side of the switch insertion groove. Is provided. As a result, it can be attached to switch knobs of multiple sizes.

Since it is configured as described above, the breaker lockout device according to the present invention can overcome the fear that the breaker will not be fixed without being damaged, and can secure the safety of the workplace. I can do it.

The breaker lockout device according to the present invention reliably utilizes a feature of a groove, a side surface, a surface, a recess around a breaker switch knob, or a hollow hole in the switch knob, which exists on the top and bottom or side of the breaker. The lockout tool is fixed, and the configuration thereof will be described below using examples.

FIG. 1 is a perspective view for explaining one embodiment of a breakout lockout device according to the present invention. 1-A is a breaker lockout tool 100. 1-B is another breaker lockout tool 120, and 1-C shows a state in which the breaker lockout tool 100 is set in the breaker 700 of FIG.

In 1-A, the breaker lockout device 100 has two slide plates 101 and 102 that overlap and slide in the direction of the arrow. In this example, the slide plate 102 has a cutout portion 103 obtained by cutting the plate at a position corresponding to the switch knob 702 shown in FIG. 7, and the slide plate 101 has a cover 113. This cover 113 is also possible when there is no cover. When there is no cover 113, when the switch knob 702 is moved, the switch knob 702 comes into contact with the upper end or lower end of the notch 103 of the slide plate 102, and the upper end or The lower end will be positioned.
The notch 103 may be on the slide plate 101 and the cover 113 may be on the slide plate 102. In this way, the slide plates 101 and 102 do not come into contact with the switch knob 702.
The slide plates 101 and 102 have bent portions 104 and 105 at one end of the plate.
The slide plate 101 also has a bent portion 106 on the upper side. The bent portion 106 may be on either of the slide plates 101 and 102, or may not be present. A screw hole 108 through which the fixing screw 107 is passed is opened in the slide plate 102 so that the slide plates 101 and 102 can slide. The fixing screw 107 can be rotated and tightened. In this figure, the fixing screw 107 has a handle portion 109 for rotation, and a locking hole 110 for locking is provided at the tip. On the other hand, either one of the slide plates 101 and 102 has a lock attachment portion 112 having a lock attachment hole 111 for attaching a lock.

In 1-C, when the breaker lockout device 100 is set in the breaker 700 of FIG. 7, the fixing screw 107 is loosened so that the slide plates 101 and 102 slide freely, and the bent portion 106 is moved. Hang on the upper recess 703 of the breaker 700, the bent portions 104, 105 are applied to both side surfaces 704, 705 of the breaker 700, and the fixing screw 107 is tightened so as to be strongly applied. In this manner, the breaker lockout tool 100 is fixed in the vertical direction by the bent portion 106 and fixed in the left and right direction by the bent portions 104 and 105. Since they are in contact with each other, they are securely fixed and do not have to worry about being damaged.

In 1-B, the breaker lockout tool 120 includes slide plates 121 and 122 that slide up and down, and bent portions 123 and 124 at upper and lower ends thereof. The slide plates 121 and 122 have a fixing screw 125 for sliding. The fixing screw 125 is attached to screw auxiliary plates 127 and 128 attached to the slide plates 121 and 122 at right angles. When the handle portion 126 of the fixing screw 125 is turned, the two screw auxiliary plates 127 and 128 approach or separate from each other, whereby the bent portions 123 and 124 slide and are pressed against the upper and lower grooves 703 and 706 of the breaker, The breaker lockout tool 120 is fixed. In this example, a switch knob cover 129 is attached to the slide plate 121. In the figure, a lock hole 130 is provided on the handle portion 126 and the screw auxiliary plate 128.
In FIG. 1, the upper and lower grooves and the right and left side surfaces are fixed by a slide plate and a bent portion that slide horizontally or vertically.

FIG. 2 is a perspective view for explaining another embodiment of the breakout lockout device according to the present invention. FIG. 2 will be described with reference to FIG. 2A, a fixing hole 201 for fixing the breaker switch knob 702 is formed in the base body 200 of the breaker lockout tool, and when the switch knob 702 is fitted into the fixing hole 201, the end of the fixing hole 201 is The switch knob 702 hits the upper surface portion 709 or the lower surface portion 710. A fastening fixture 206 having a protrusion 202 corresponding to the shape of the recess 708 and the rising surface 707 of the breaker 700 and a second rising portion 203 and having a screw hole 205 for the fixing screw 204 is formed on the base 200. The fastening fixture 206 and the base body 200 are slidably placed, and are fixed by a fixing screw 204, and can be tightened or loosened by turning the handle portion 207. The fastening fixture 206 is pulled strongly upward, the projection 202 is fitted into the recess 708 of the breaker 700, and the fixing screw 204 is tightened to fix. It can be attached through the lock to the lock-attached hole 209 opened in the handle portion 207 and the fixing plate 208. The difference between 2-B and 2-A is that a cover 210 that covers the switch knob 702 is attached.

In 2-C, the difference from 2-A and 2-B is that the fastening screw for fastening is a fastening slide screw 211. The upper side of the base body 200 of the breaker lockout tool is a first support plate 212 bent at a right angle, and the fastening fixture 206 is slidably supported in the hole 213 of the support plate 212. A second support plate 214 that rotatably supports the fastening slide screw 211 is attached to the upper end of the fastening fixture 206. When the handle portion 215 is rotated, the tightening slide screw 211 is rotated, and the base body 200 and the tightening fixture 206 are relatively approached or separated from each other vertically. When separated, the end of the fixing hole 201 presses the upper surface portion 709 of the switch knob 702, the projection 202 fits into the recess 708 of the breaker 700, and the lockout tool is fixed to the breaker 700. Since the contact portion is a surface, it is securely fixed and there is no fear of scratching. After tightening, the screw handle 215 can be bent halfway and the lock can be attached to the lock holes 216 and 217 provided in the support plate 212. In 2-D, the state which attached the 2-C lockout tool to the breaker 700 is shown.

FIG. 3 is a perspective view for explaining another embodiment of the breaker lockout device according to the present invention. The fastening fixture 206 in FIG. 2 has the protrusion 202 and the second upright portion 203 that fit into the recess 708 of the breaker 700, but 3-A, 3-B, 3-C, 3-D. , 3-G, similarly, a fastening fixture 306 similar to the fastening fixture has a protrusion 302 and a second upright portion 303. Explaining other functions, in 3-A, the fastening fixture 306 is further provided with a fitting frame 307 for fitting the switch knob 702 of the breaker 700, which is further screwed at a right angle. A plate 308 is attached, and a fixing screw 310 having a closing plate 309 to be tightened by rotation is attached to the screw fastening auxiliary plate 308. After the screw is tightened, the handle portion 311 can be bent, and the lock can be attached to the lock attaching hole 312. The closing plate 309 contributes to fixing by pressing the lower surface portion 710 of the switch knob 702 of the breaker 700. In addition, 3-G has shown the condition which attached the thing of 3-A to the breaker 700. FIG.

In 3-B, suction fixing portions 313 are provided on both sides of the fitting frame 307 in the same manner as 3-A. Further, a cover 314 that covers the switch knob 702 is attached. The suction fixing part 313 is pressed against a flat surface to release air, create a vacuum state, and fix with a suction force. The number is not necessarily limited to two. One may be sufficient. 3-C is obtained by removing the portion corresponding to 308 to 312 in 3-A from 3-B. Thereby, the function that the closing plate 309 presses the lower surface portion 710 of the switch knob 702 of the breaker 700 is lost.

3-D is still another embodiment, and a box 315 is attached to a fastening fixture 306 having a protrusion 302 and a second upright portion 303, and a suction fixing part 313 is attached to the box 315. Yes. An operation rod 316 for attaching or removing the suction fixing portion 313 is pulled out to the outside of the box 315, and this has a lock attachment hole 317. When the lock is attached, the operation rod 316 cannot be moved. The box 315 is provided with a 3-A closing plate 309, a screw 310, and a screw handle 311.

3-E is the one in which the portion relating to the 3-D box 315 and the suction fixing portion 313 is left and the portion of the fastening fixture 306 is removed.

3-F is the one of 1-A in FIG. 1, in which the suction fixing portion 313 is attached to the slide plate 101 without the cover 113. In general, the suction fixing portion 313 is strongly fixed in the right-angle direction, and the slide plate is firmly fixed in both the horizontal and vertical directions, so that it can be surely fixed in both directions.

FIG. 4 is a perspective view for explaining another embodiment of the breaker lockout device according to the present invention. 4-A is another example of the breaker 700, and has a magnetic plate 401 made of a material such as iron attached to a magnet inside. 4-B is a lockout tool 400, which has a magnet body 402 and a lock / release handle 403 for locking or releasing the magnet body 402. attached. When the lock / release handle 403 is rotated to the right, the magnet body 402 attracts the magnetic plate 401 (in a locked state). In this state, the lock-attached hole 404 and the lock-attached hole 405 overlap, and the lock can be attached. 4-C shows a state where 4-B is attached to 4-A.

FIG. 5 is a perspective view for explaining another embodiment of the breakout lockout device according to the present invention. Looking at the features of the breaker in FIG. 7, the switch knob 702 protrudes substantially obliquely at the ON or OFF position. Further, the switch knob 702 has a hollow hole 711. With this feature, you can fix the breakout lockout. Returning again to FIG. The breaker lockout device 500 includes knobs 501A and 501B like a clothespin and an elastic body 502 such as a spring. When the knobs 501A and 501B are pressed with a finger, the tip of the clothespin is centered on the rotation center 508. The scissors 503A and 503B corresponding to the scissors are opened and closed. As shown in the figure, one of the scissors 503A and 503B has a switch insertion groove 504 that enters the switch knob 702 substantially obliquely, and the other has a plurality of movable pins 505. A force is received in the direction of being pushed out by the cushion portion 506 such as a spring or a cushion material, and the dent is caused by the pushing pressure. The scissors 503A and 503B further have lock attachment portions 507A and 507B having holes for allowing the lock to pass therethrough. In this example, when the knobs 501A and 501B are pressed with a finger, the scissors 503A and 503B are opened. Can overlap and attach a lock. When the breaker lockout tool 500 is inserted into the switch knob 702 of FIG. 7 so as to fit into the switch insertion groove 504 while pressing the knobs 501A and 501B with fingers, the scissors 503A and 503B is closed, and the movable pin 505 is pushed and recessed by the switch knob 702, but the movable pin 505 that hits the hollow hole 711 of the switch knob 702 fits into the hollow hole 711. Therefore, the breaker lockout tool 500 is fixed to the switch knob 702. In this state, the switch knob 702 cannot be moved except by a person who holds the lock key by attaching the lock.

In FIG. 5, the switch insertion groove 504 corresponds to the size of one switch knob 702, and there is one, but the switch insertion groove 504 has a switch insertion groove 504 because it corresponds to the switch knob 702 of other sizes. If another switch insertion groove 504 for another size is provided on the opposite side, it is convenient that one breaker lockout tool 500 can correspond to a plurality of switch knobs 702 of different sizes.

  In the drawing, lines hidden behind other surfaces due to overlapping of surfaces are described as much as possible with dotted lines.

As described above, the breakout lockout device according to the present invention can be easily attached to the breaker in order to clarify the off state of the breaker during electrical work and to avoid unexpected switch-on by others, Since the breaker is not damaged and can be reliably kept in an OFF state without being disengaged, it is extremely effective in ensuring the safety of electrical work, and thus has great industrial applicability.

It is a perspective view explaining one embodiment of the lockout tool for breakers by the present invention. It is a perspective view explaining another embodiment of the lockout tool for breakers concerning the present invention. It is a perspective view explaining another embodiment of the lockout tool for breakers concerning the present invention. It is a perspective view explaining another embodiment of the lockout tool for breakers concerning the present invention. It is a perspective view explaining another embodiment of the lockout tool for breakers concerning the present invention. It is a figure which shows the conventional lockout tool. It is a perspective view which shows the external shape of the circuit breaker generally used in the industry.

100, 120, 500, 600 Lockout tool 101, 102, 121, 122 Slide plate 103 Plate notch 104, 105, 106, 123, 124, 604 Bending portion 107, 125, 204, 310 Fixing screw
108, 205 Screw holes 109, 126, 207, 215, 311 Handle portions 112, 507A, 507B Lock attachment portions 113, 129, 210, 314 Cover 127, 128 Screw auxiliary plates 110, 111, 130, 209, 216, 217, 312, 317, 404, 405, 607 Locking hole 200 Base 201 Fixing hole 202, 302 Protruding part 203, 303 Upright part 206, 306 Tightening fixture 208 Fixing plate 211 Tightening slide screw 212 First support plate 213 Hole 214 Second support plate 307 Fitting frame 308 Screw tightening auxiliary plate 309 Closure plate 313 Suction fixing portion 315 Box 316 Operation bar 401 Magnetic plate 402 Magnet body 403 Lock / release handle 501A, 501B Knob 502 Elastic body portion 503A, 503B Scissors 504 Switch insertion groove 5 5 Movable pin 506 Cushion portion 508 Center of rotation 601 “U” -shaped depression 602 Screw 603 Screw tip 605 Groove 606 Locking portion 700 Breaker 701 Switch frame 702 Switch knob 703 Depression 704, 705 Side surface 707 Rising surface 708 Recess 709 Upper surface portion 710 Lower surface portion 711 Hollow hole

Claims (3)

A breaker lockout device to be attached to the breaker in order to limit unexpected ON / OFF of the breaker by a person other than a predetermined worker,
There is a knob part for pressing the clothespin, a rotation center part connected to the knob part, a scissor part connected to the knob part, and an elastic body part for returning the knob part, and one of the scissor parts is A switch insertion groove that can be inserted so as to fit the switch knob of the breaker, and the other of the scissors is a plurality of movable pins for fitting into hollow holes provided in the switch knob of the breaker, and the plurality of movable A breakout lockout device comprising a cushion portion for moving a pin in accordance with the presence or absence of pressure. 2. The breaker lockout device according to claim 1, further comprising: a lock attaching portion having a lock attaching hole for attaching a lock for fixing both of the scissors to be immovable. 3. The breaker lockout device according to claim 1, wherein another switch insertion groove into which the switch knob of another size is fitted is provided on the opposite side of the switch insertion groove.