JP3818470B2 - Circuit breaker interlock device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an interlock device for a circuit breaker that allows the circuit breaker to be removed from a panel as the operation handle of the circuit breaker moves to an off position.
[0002]
[Problems to be solved by the invention]
In the interlock device, as disclosed in Japanese Utility Model Publication No. 7-51722, the slide body is slid in conjunction with the operation handle, and the shaft crank portion is inserted into the long hole of the slide body. There is a configuration in which a body slide motion is converted into a rotational motion by a crank portion of a shaft and transmitted to an interlock body to rotate the interlock body.
[0003]
In this configuration, when the operation handle of the circuit breaker is in the ON position, the amount of protrusion of the interlock body with respect to the circuit breaker is large, and the interlock body is caught by the switchboard, so that the circuit breaker cannot be removed. . Further, when the operation handle is in the off position, the amount of protrusion of the interlock body with respect to the circuit breaker is small, and the interlock body does not catch on the switchboard, so that the circuit breaker can be removed.
[0004]
However, in the case of the above-described conventional configuration, it is necessary to perform a difficult bending process for forming a crank portion on the shaft, and it is also necessary to perform a troublesome work of brazing a cylindrical boss that rotatably supports the shaft to the base. There is still room for improvement in terms of manufacturing workability.
The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an interlock device for a circuit breaker capable of improving manufacturing workability.
[0005]
[Means for Solving the Problems]
An interlock device for a circuit breaker according to claim 1 includes a slide body that slides in conjunction with an operation of an operation handle of the circuit breaker, an interlock body that can slide in a direction different from the slide body, and the slide body A rolling element that slides together with the slide body, and an inclined surface portion that is provided on the interlock body and is pressed by the rolling body when the slide body slides to slide the interlock body. Have.
[0006]
According to the above means, when the slide body slides with the operation of the operation handle, the slide motion of the slide body is transmitted from the rolling body to the interlock body through the inclined surface portion, and the interlock body slides and is opposite to the circuit breaker. Project to the side of the circuit breaker. For this reason, since the interlock body is caught on the board or is not caught on the board, the circuit breaker cannot be removed or can be removed in conjunction with the operation of the operation handle. Therefore, unlike the conventional case where the slide motion of the slide body is converted into the rotational motion by the crankshaft, complicated bending work of the crankshaft and brazing work of the boss are unnecessary, so that the manufacturing workability is improved.
[0007]
The interlock device for a circuit breaker according to claim 2 is characterized in that the inclined surface portion is formed by bending a part of the interlock body. According to the above means, the rolling element and the inclined surface portion are in reliable contact, and the sliding motion of the slide body is reliably transmitted from the rolling element to the interlock body through the inclined surface portion, so that the slide of the interlock body is stabilized. .
[0008]
The interlock device for a circuit breaker according to claim 3 is characterized in that a notch that is engaged with the operation handle is formed in the slide body.
According to the above means, although the operation handle is rotatable and the slide body is slidable, the rotation of the operation handle is reliably transmitted to the slide body, so that the slide of the slide body is stabilized. .
[0009]
The interlock device for a circuit breaker according to claim 4 is characterized in that a rotation stopping body for rotating the interlock body against a pressing force acting from the rolling element is substantially in contact with the interlock body. ing.
According to the above means, when the rolling element slides, turning force acts on the inclined surface portion from the rolling element. However, since the interlock body is stopped by the rotation stopping body, it slides stably without rotating.
[0010]
The interlock device for a circuit breaker according to claim 5 is characterized in that an opening corresponding to a fixing screw of the circuit breaker is formed in the slide body when the operation handle is moved to the off position. Yes.
According to the above means, when the operating handle is in the off position, the opening of the slide body corresponds to the fixing screw of the circuit breaker, so that the fixing screw can be loosened through the opening. When the operating handle is moved to the ON position, etc., the opening of the slide body is displaced with respect to the fixing screw, and the fixing screw cannot be loosened. Will improve.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings. First, in FIG. 1B, the switchboard 1 is configured by attaching a panel 3 to a mounting frame 2, and a terminal block 4 is fixed to the rear part of the mounting frame 2, and a pair of females is mounted on the terminal block 4. A side terminal (not shown) is attached. Reference numeral 3 a denotes an opening formed in the panel 3.
[0012]
A circuit breaker 5 is attached to the terminal block 4. The circuit breaker 5 is attached to the terminal block 4 by tightening a plurality of fixing screws 5a (see a in FIG. 1) into the terminal block 4 through the circuit breaker 5. 5, male-side terminals 5 b and 5 b are mounted on the rear surface, and each male-side terminal 5 b is fitted to a female-side terminal of the terminal block 4. Further, an operation handle 5c is mounted on the front surface of the circuit breaker 5 so as to be rotatable in the vertical direction (the direction of arrow A and the direction of the opposite arrow A in FIG. 1A). It protrudes outside the switchboard 1 through the opening 3a.
[0013]
A frame 6 is disposed in front of the circuit breaker 5. As shown in FIG. 4, the frame 6 is formed by screwing a side frame 6a, a side frame 6b, a lower frame 6c, and an upper frame 6d. The upper frame 6d has a structure as shown in FIG. In addition, a bent portion 6e having a substantially U-shape is formed, and a first guide plate 7 corresponding to the first guide body is screwed. The fixing screw 5a of the circuit breaker 5 is tightened between the bent portion 6e and the first guide plate 7 in the circuit breaker 5, as shown in FIG.
[0014]
The operation handle 5c of the circuit breaker 5 is engaged with a notch 8a of a slide plate 8 corresponding to a slide body. A wide portion 8 b is formed at the upper end portion of the slide plate 8. As shown in FIG. 1B, the wide portion 8b is inserted into the guide plate 7 and is in contact with the front surface of the bent portion 6e, and when the operation handle 5b is turned up and down. The rotational movement of the operation handle 5b is transmitted to the slide plate 8, and the slide plate 8 slides up and down while the wide portion 8b is guided by the guide plate 7 and the bent portion 6e.
[0015]
As shown in FIG. 6, semicircular cutout portions 8 c and 8 c are formed in the wide portion 8 b of the slide plate 8. Each of these notches 8c corresponds to an opening, and as shown in FIG. 1A, when the operation handle 5c is in the lower off position, each notch 8c moves downward to interrupt the circuit. This corresponds to the fixing screw 5a of the vessel 5. Accordingly, it is possible to engage and remove the fixing screws 5a by engaging the tool with the fixing screws 5a through the notches 8c.
[0016]
Further, as shown in FIG. 2A, when the operation handle 5c is in the upper ON position and the trip position, each notch 8c moves upward and is displaced with respect to the fixing screw 5a. Therefore, since the fixing screw 5a is covered from the front by the wide portion 8b, the fixing screw 5a cannot be attached or detached.
[0017]
As shown in FIG. 6, a pin 9 is caulked to the wide portion 8 b of the slide plate 8, and an inner ring of a radial bearing 10 is attached to the outer peripheral surface of the pin 9. The bearing 10 corresponds to a rolling element. An E ring 11 is attached to the outer peripheral surface of the pin 9, and the bearing 10 is secured from the pin 9 by the E ring 11.
[0018]
As shown in FIG. 1A, a second guide plate 12 corresponding to a second guide body is screwed to the rear surface of the upper frame 6d, and the gap between the guide plate 12 and the upper frame 6d is secured. As shown in FIG. 7, an interlock plate 13 corresponding to an interlock body is inserted so as to be slidable in the direction of arrow B and the direction of the opposite arrow B (left and right direction). The guide plate 12 is formed with a plate-like anti-rotation portion 12a extending along the interlock plate 13, and the anti-rotation portion 12a is in contact with the interlock plate 13 from the opposite arrow A direction. The rotation stop portion 12a corresponds to a rotation stop body.
[0019]
A flat spring mounting portion 12 b is fixed to the second guide plate 12. A return spring 14 made of a tension coil spring is stretched between the spring mounting portion 12b and the interlock plate 13, and the return spring 14 urges the interlock plate 13 in the counter arrow B direction. Yes. An inclined surface portion 13a is formed at the end of the interlock plate 13 in the arrow B direction. As shown in FIG. 1A, when the operation handle 5c is in the off position, the inclined surface portion 13a is a bearing. It protrudes into 10 slide tracks.
[0020]
Next, the operation of the above configuration will be described. First, in FIG. 1, in the state where the operation handle 5 c is in the lower (load side) off position, each notch 8 c of the slide plate 8 corresponds to the fixing screw 5 a of the circuit breaker 5. The fixing screw 5a can be loosened through 8c. Moreover, since the interlock plate 13 is slid in the direction of the arrow B by the spring force of the return spring 14 and is pulled in to the circuit breaker 5 side, the interlock plate 13 is not caught on the panel 3 and the circuit breaker 5 Can be removed from the terminal block 4 and extracted through the opening 3 a of the panel 3.
[0021]
In this state, when the operation handle 5c is operated to the upper (power supply side) trip position or the on position, the slide plate 8 slides in the direction of arrow A as shown in FIG. 2, and the wide portion 8b of the slide plate 8 is moved. Since the fixing screw 5a of the circuit breaker 5 is covered from the front side, the fixing screw 5a cannot be removed. At the same time, the sliding movement of the slide plate 8 is transmitted from the bearing 10 to the interlock plate 13 through the inclined surface portion 13a, and the interlock plate 13 slides in the direction of arrow B against the spring force of the return spring 14, and the circuit breaker. Projects to the opposite side of 5. Therefore, since the interlock plate 13 is hooked on the panel 3, the circuit breaker 5 cannot be removed.
[0022]
According to the above embodiment, the sliding motion of the slide plate 8 is transmitted from the bearing 10 to the interlock plate 13 through the inclined surface portion 13a, and the interlock plate 13 is slid. For this reason, unlike the conventional case in which the sliding motion of the slide plate 8 is converted into the rotational motion by the crankshaft, complicated bending work of the crankshaft and brazing work of the boss are unnecessary, so that the manufacturing workability is improved. .
[0023]
Further, the inclined surface portion 13 a was formed by bending a part of the interlock plate 13. For this reason, the bearing 10 and the inclined surface portion 13a are reliably in contact with each other, and the sliding movement of the slide plate 8 is reliably transmitted from the bearing 10 to the interlock plate 13 through the inclined surface portion 13a, so that the slide of the interlock plate 13 is stable. Turn into.
[0024]
Further, the notch 8 a of the slide plate 8 was engaged with the operation handle 5 c of the circuit breaker 5. Therefore, although the operation handle 5c is rotatable and the slide plate 8 is slidable, the rotation of the operation handle 5c is reliably transmitted to the slide plate 8, so that the slide of the slide plate 8 is stable. Turn into.
[0025]
Further, the rotation stop portion 12 a of the second guide plate 12 was brought into contact with the interlock plate 13. For this reason, when the bearing 10 slides in the direction of the arrow A and contacts the inclined surface portion 13a, turning force acts on the inclined surface portion 13a from the bearing 10, but the interlock plate 13 is stopped by the anti-rotation portion 12a. So it slides stably without turning.
[0026]
When the operation handle 5c is moved to the off position, the notch 8c is made to correspond to the fixing screw 5a, and when the operation handle 5c is moved to the on position or the like, the notch 8c is displaced with respect to the fixing screw 5a. For this reason, when the operation handle 5c is moved to the ON position or the like, the fixing screw 5a cannot be loosened, and the interlock is performed twice, so that the reliability with respect to safety is improved.
[0027]
In the above embodiment, the radial bearing 10 is used as the rolling element, but the present invention is not limited to this. For example, a roller may be used.
Moreover, in the said Example, although the rotation stop part 12a of the 2nd guide plate 12 was made to contact the interlock board 13, it is not limited to this, For example, the interlock board 13 is pressed by the bearing 10 The two may be spaced apart so that they do not rotate when done.
[0028]
Moreover, in the said Example, although the wide part 8b was formed in the slide board 8, it is not limited to this, For example, the slide board 8 is formed in the substantially constant narrow shape, and it is in the position of the operation handle 5c. Regardless, the fixing screw 5a of the circuit breaker 5 may be exposed.
[0029]
【The invention's effect】
As is apparent from the above description, the circuit breaker interlock device of the present invention has the following effects.
According to the means of the first aspect, the sliding motion of the slide body is transmitted from the rolling body to the interlock body through the inclined surface portion, and the interlock body is slid. This eliminates the need for complicated bending work of the crankshaft and brazing of the boss, thereby improving manufacturing workability.
According to the second aspect, the inclined surface portion is formed by bending a part of the interlock body. For this reason, since a rolling element and an inclined surface part contact reliably, the slide of an interlocking body is stabilized.
[0030]
According to the means described in claim 3, the notch portion of the slide body is engaged with the operation handle of the circuit breaker. For this reason, since the rotational movement of the operation handle is reliably transmitted to the slide body, the slide of the slide body is stabilized.
According to the fourth aspect of the present invention, since the rotation stop body is brought into substantially contact with the interlock body, even if the turning force acts on the inclined surface portion from the rolling element, the interlock body does not rotate and is stable. Slide.
[0031]
According to the fifth aspect, when the operation handle of the circuit breaker is moved to the ON position or the like, the opening of the slide body is displaced with respect to the fixing screw of the circuit breaker, and the fixing screw is loosened. I made it impossible. For this reason, since interlock is performed twice, the reliability with respect to safety improves.
[Brief description of the drawings]
FIGS. 1A and 1B are diagrams showing an embodiment of the present invention (a is a front view showing the entire configuration in an off state of an operation handle, and b is a top view).
2A is a front view showing the overall configuration with the operation handle turned on and tripped, and FIG. 2B is a top view. FIG. 3 is a perspective view showing the interlock device with the frame removed. FIG. 5 is a perspective view showing a slide plate and a guide plate. FIG. 6A is a front view showing the slide plate, and FIG. 5B is a cross section taken along line XX. FIG. 7 is a perspective view showing a sliding state of the interlock plate.
1 is a switchboard (panel), 5 is a circuit breaker, 5c is an operation handle, 7 is a first guide plate (first guide body), 8 is a slide plate (slide body), 8a is a notch, and 8c is a notch Part (opening), 10 is a bearing (rolling element), 12 is a second guide plate (second guide element), 12a is a rotation stop (rotation element), and 13 is an interlock plate (interlock element). , 13a indicates an inclined surface portion.

Claims (5)

A slide body that slides in conjunction with the operation of the operation handle of the circuit breaker;
Interlock body that can slide in a different direction from this slide body,
A rolling element provided on the slide body and sliding with the slide body;
An interlock device for a circuit breaker, comprising: an inclined surface portion provided on the interlock body and being pressed by the rolling body when the slide body slides to slide the interlock body. 2. The circuit breaker interlock device according to claim 1, wherein the inclined surface portion is formed by bending a part of the interlock body. 2. The circuit breaker interlock device according to claim 1, wherein the slide body is formed with a notch that is engaged with the operation handle. The interlock device for a circuit breaker according to claim 1, wherein the interlock member is substantially in contact with a rotation member that stops the interlock member against a pressing force acting from the rolling member. 2. The circuit breaker interlock device according to claim 1, wherein the slide body has an opening corresponding to a fixing screw of the circuit breaker when the operation handle is moved to the off position.

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