JPH01143109A - Handle control device for circuit breaker - Google Patents

Abstract

PURPOSE:To stabilize the operational force as well as decrease it so as to accurately fulfil the function of pull-off operation by installing a compression spring which frees oscillation of an operation axis between a mounting frame and a flange of a guide cylinder. CONSTITUTION:Since the large diameter part 26a of an axis supporting cylinder 26 has space G2 in the radial direction to the guide hole of a fixture 25 and a compression spring 17 is installed between a mounting frame 11 and a flange 24a of a guide cylinder 24, an operation axis 20 becomes free in oscillation with a through hole 11a as the center including the axis supporting cylinder 26 and the guide cylinder 24, and the operation axis 20 is always retained vertically to the mounting face by the spring force of a compression spring 17 similarly to the conventional equipment. The operation axis 20, the axis supporting cylinder 26 and a finger 16 come to be supported only by the guide cylinder 24 and the force resisting to the operational force becomes only the sliding friction to the guide cylinder 24 attendant upon the weight of the axis supporting cylinder 26 including the operation axis 20, so the operational force is decreased and stabilized and the indication of pull-off operation of an outside handle is done accurately.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a handle operating device for opening and closing a circuit breaker installed in a power distribution board or the like from the outside.

[Conventional technology]

As this type of handle operating device, for example, those shown in FIGS. 15 to 30 are known. In the figure, the handle operating device includes an operating part 30 that is attached to the mounting wall 2 in the distribution board 1 together with the circuit breaker 3 with screws 4, as shown in FIG. The handle part 40 is detachably connected to the operating part 30 when the circuit breaker 5 is closed, and allows the circuit breaker 3 to be opened and closed. The operation unit 30 is fixed to the circuit breaker 3 with the aforementioned screws 4, and has a U-shaped mounting frame 11.
A shaft support tube 12 is loosely fitted into a through hole 11a provided in this mounting frame 11, and a shaft support tube 12 is fitted into the front side of this shaft support tube 12 to ensure an axial clearance with respect to the through hole 12a. The shaft ring 14 is fixed to the shaft ring 14 by a screw 13.

The circuit breaker side portion of the shaft support cylinder 12 is formed into a flange 12a, and fingers 16 are fixed to the end face of the flange 12a by screws 15 so as to sandwich the operation handle 3a of the circuit breaker 3 from both sides. Furthermore, a compression spring 17 is provided between the mounting frame 11 and the finger 16 to urge the temple to widen. equipped. Also, the shaft hole 12 of the shaft support cylinder 12
An operating shaft 20 having a joint 19 fixed to one end thereof is inserted into b and is fixed with a screw 18.

The joint 19 is composed of a cap 21 made of a cylindrical body with a truncated conical tip that is fitted onto the other end of the operating shaft 20, and a parallel pin 22 that fixes the camp 21 to the operating shaft 20.

Note that both ends of the parallel bottle 22 protrude from the outer periphery of the cap 21, and the protrusion amounts A and B are slightly different. The spring pin 23 shown in FIGS. 24 and 25 may be used to fix the cap 21. The handle portion 40 is made of FR5.
A decorative frame 32 is provided on the front side of the door 5 and is attached to the door 5 with screws 31, and a circular hole 33a and a radial groove that are pivotally supported by a guide hole 32a provided in the decorative frame 3232 and into which the joint 19 is removably fitted. A bushing 33 provided with 33b and 33c, and a stop plate 36 that prevents the bushing 33 from being removed and is integrated with the external handle 35 via a screw 34.
It is made up of.

In the above configuration, first, as shown in FIG. 18, in the operating unit 30, the shaft supporting cylinder 12 has an axial gap G1 and a radial gap G2 with respect to the through hole 11a of the mounting frame 11, and the mounting frame 11 and the finger 16, the operating shaft 20 can swing freely around the through hole 1.1a, and the operating shaft 20 is always held against the mounting surface by the spring force of the compression spring 17. It is held vertically and there is no sagging a as shown in FIG.

Furthermore, since the tip of the cap 21 of the joint 19 is formed into a truncated conical shape, it is possible to connect it to the handle portion 40 if the eccentricity is within the tolerance as shown in FIGS. 29 and 30. It has become. Note that the left and right protrusion amount A of the joint 19 from the cap 21 of the parallel bin 22 or spring bin 23
, B are different because the fitting with the handle portion 4o is limited to one direction.

[Problem that the invention seeks to solve]

In such a conventional device, since the compression spring 17 of the operating portion 30 is loaded between the fixed mounting frame 11 and the rotating finger 16, the opening/closing operation of the external handle 35, that is, the operating shaft 20 When the compression spring 17 rotates, the compression spring 17
Since a force is applied to the finger 16 to which the winding end is pressed against the finger 16, the operating force of the external handle 35 becomes heavy, or when the circuit breaker 3 is tripped from the closed state. If the operation handle 3a has a weak operating force,
It may not be possible to rotate the external handle 35 to the predetermined position displayed on the decorative frame 32 by rotating the finger 16 via the operating shaft 20, or the cap 21 may not be cylindrical at the joint 19 and the handle portion 40. Since it is a body, in combination with the operating shaft 20, the bottle 22.
Or, when integrating the pin 22 or 23 and ensuring the protrusion amounts A and B at both ends is troublesome and requires a lot of time, or the operation force of the external handle 35 described above becomes heavy, the pin 22 or 23
Damage to the round hole 33a and radial groove 33 of the bushing 33.
b, 33c Since the shape is complex, there are drawbacks such as increased processing time.

The purpose of this invention is to eliminate the above-mentioned conventional drawbacks, reduce and stabilize the operating force, and make it possible to handle circuit breakers with weak operating force of the operating handle during tripping operation.
An object of the present invention is to provide a handle operating device for a circuit breaker that is easy to assemble.

Means for Solving Problem c] In order to achieve the above-mentioned object, the present invention includes a U-shaped mounting frame attached to the front side of a circuit breaker installed in a box, and a mounting frame provided in the mounting frame. a guide cylinder having a flange which is guided in a through hole with a axial movement and has a compression spring wrapped between it and the front side of the mounting frame; a pivot support tube that is pivotally supported by the guide tube and has a large diameter portion that is fixedly attached to one end of the finger that holds the operation handle of the circuit breaker and that is loosely fitted into the guide hole of the fixation device; An operating section consisting of an operating shaft, one end of which is inserted and fixed into a shaft hole provided in a shaft support cylinder, and a joint made of a prismatic body having a truncated conical tip is fixed at the other end, and an axis of the operating shaft of the operating section. A through hole provided in the door of the box body located on the line, a decorative frame fixed to the front side thereof, and an external handle that is pivotally supported by the decorative frame with axial movement restraint and has a coupling hole that can be freely attached to and detached from the joint. It is equipped with a handle portion.

[Effect]

In the handle operating device according to the present invention, a compression spring that allows the operating shaft to swing freely is mounted between the mounting frame, which is a fixed body, and the collar of the guide tube, thereby reducing the operating force and stabilizing it. This makes it possible to perform the function even in a circuit breaker whose operation handle has a weak operating force during tripping operation. In addition, by making the joint a prismatic body with a truncated conical tip and making the joint hole in the handle part a hole with the same cross-sectional shape that slides into the joint, fixing the joint to the operating shaft and machining the joint hole are facilitated. Ru.

〔Example〕

1 to 10 are diagrams showing an embodiment of a circuit breaker handle operating device according to this invention.

In the figure, the same parts as those of the conventional apparatus shown in FIG. 15 described above are denoted by the same reference numerals, and the differences will be explained. This embodiment differs from the conventional device in that a compression spring 17 is attached to a mounting frame 11 for swingably supporting an operating shaft 20.
and through hole 11. The guide tube 2 is guided so as to be able to pivot freely in a.
By mounting the bullet between two parts that do not rotate, such as the collar 24a of No. 4, the operating force is reduced and stabilized, and the cap 42 that constitutes the joint 41 is made of a prismatic body. Assembly and processing are facilitated by making the coupling hole 33c of the bushing 33, which is pivotally supported on the decorative frame 32, have the same cross-sectional shape so that the cap 41 can be removably slid into the coupling hole 33c.

For this purpose, the operating unit 30 is located on the front side, where a compression spring 17 is wound between the mounting frame 11 similar to the conventional device and the front side of the mounting frame 11, which is guided in a through hole 11a of the mounting frame 11 so as to be able to pivot freely. A guide cylinder 24 having a flange 24a on the side, and a guide hole 25a having a diameter larger than the inner diameter of the guide cylinder 24 coaxially, and both leg ends that press the flange 24a and bias the compression spring 17 are fixed to the mounting frame. A fixed member 25 in the shape of a letter, a shaft supporting cylinder 26 which is pivotally supported by the guide cylinder 24, has a stepped large diameter part 26a formed on the front side to fit loosely into the guide hole 25a, and has a shaft hole 26b on the axis. , a finger 16 that is fixed to the narrow-diameter end surface of the shaft support tube 26 with a screw 15 and holds the operating handle 3a from both sides;
8, and a joint 41 is fixed to the other end of the operating shaft 2.
0. The joint 41 includes a camp 42 made of a square prism with a truncated conical tip as described above, and a driving pin 4 that fixes the cap 42 to the other end of the operating shaft 20.
It is composed of 3. The handle part 40 is pivoted by a decorative frame 32 having a guide hole 32a attached to the front side of the door 5 with a screw 31 and a guide hole 32a of the decorative frame 32, as in the conventional device shown in FIG. 15, and a joint 41 is detachable. It consists of a bushing 37 provided with a square coupling hole 37a into which the bushing 37 is fitted, and a stop plate 38 that prevents the bushing 37 from being removed and is integrated with the external handle 35 via a screw 34.

In the above configuration, first of all, as shown in FIG.
Since the compression spring 17 is elastically loaded between the flange 24a of 4, the operating shaft 20, including the shaft support cylinder 26 and the guide cylinder 24, can freely swing around the through hole 11a, and the operating shaft 20 can swing freely around the through hole 11a. As with the conventional device, the spring force of the compression spring 17 keeps it perpendicular to the mounting surface at all times.

From this, the operating shaft 20 related to handle operation. Pivot support tube 2
6 and fingers 16 are supported only by the guide tube 24, and the force that opposes the operating force is applied to the operating shaft 20.
Since only the sliding frictional force with the guide tube 24 due to the weight of the shaft support tube 26 including the shaft support tube 26 is generated, the operating force is significantly reduced and stabilized at the same time. Also, in the joint 41 and the handle part 40, the fitting part of the cap 42 is a prismatic body, but the tip is formed into a truncated cone shape, so that if the eccentricity is within the tolerance, there will be no problem when connecting with the handle part 4o. Moreover, the connection with the operation shaft 20 can be performed on a flat surface and there is no protrusion of the pin, making the work easy. Machining of the coupling hole 37a of the bush 37 of the handle portion 40 is also facilitated as it is a single step such as using a broach, and the strength is also increased since the coupling between the joint 41 and the coupling hole 37a is made by surface contact. be done.

In the above embodiments, the cap 42 of the joint 41 is made of a square prism, but as shown in two different embodiments shown in FIGS. 11 and 12 and FIGS. The same can be said for the camp 44 using a body or the cap 45 using a hexagonal column.

〔Effect of the invention〕

According to this invention, a compression spring for holding the operating shaft perpendicular to the mounting surface and making it swingable is elastically loaded between the non-rotating components, and a joint is fixed to the tip of the operating shaft. By forming the coupling holes of the external handle installed on the door side into the same prismatic shape that can be fitted into each other, the operating force is reduced and stabilized, and the external handle tripping operation can be accurately indicated. It is possible to provide a handle operating device for a circuit breaker that facilitates assembly and processing of a coupling hole in an external handle.

[Brief explanation of the drawing]

1 to 10 are views showing an embodiment of the circuit breaker handle operating device according to the present invention, in which FIG. 1 is a side view, FIG. 2 is a front view, and FIG. 3 is a partially sectional view. An enlarged side view of the main part, Fig. 4 is a view in the direction of the ■ arrow in Fig. 3, Fig. 5 is a longitudinal sectional view of the main part, Fig. 6 is a view in the direction of the V arrow in Fig. 5, and Fig. 7 is a side view of the main part. ,
Figure 8 is a view in the direction of the ■ arrow in Figure 7, Figure 9 is an enlarged view of the main part of Figure 7, Figure 10 is a view in the direction of the ■ arrow in Figure 9, Figures 11 and 1.
2, 13, and 14 are views showing different embodiments of the circuit breaker handle operating device according to the present invention. FIG. 11 is an enlarged side view of the main part, and FIG. Arrow view, Fig. 13 is an enlarged side view of main parts, Fig. 14
The figure is a view in the direction of the ■ arrow in FIG. 13, and FIGS. 15 to 30 are diagrams showing an example of a handle operating device of a conventional circuit breaker.
Fig. 15 is a perspective view, Fig. 16 is a side view of the main part, Fig. 17 is a view taken along the XV+ arrow in Fig. 16, Fig. 18 is an enlarged vertical sectional view of the main part of Fig. X■ arrow view of the figure, No. 20
The figure is a side view of the main part, Fig. 21 is a view in the direction of the XX arrow in Fig. 20, Fig. 22 is an enlarged view of the main part in Fig. 20, Fig. 23 is a view in the direction of the double arrow in Fig. 22, and Fig. 24 is a side view of the modification of Fig. 22, and Fig. 25 is! 26 is a longitudinal cross-sectional view of the main part, FIG. 27 is a double arrow sectional view of FIG. 26, and FIGS. 28 to 30 are side views for explaining functions. 2: Mounting wall, 3: Circuit breaker, 3a: Operation handle, 5
:it, 11: Mounting frame, 11a: Through hole, 16; Finger, 17: Compression spring, 18: Screw, 20: Operating shaft, 24
: Guide tube, 24a: Flange, 25: Fixture, 25a: Guide hole, 26; Shaft support tube, 26a: Large diameter part, 26b; Shaft hole, 30
: Operation unit, 32: Decorative frame, 35: External handle, 37a
: Connection hole, 40: Handle part, 4141 hand. 1~Jx person I'1-2 Iwao Yamaguchi ゛ha no te/'
＼～I Figure 1 Figure 2 Pe3 Figure 3 Figure 5 Figure 6 Figure 7 Figure 8 Figure 11 Figure 12 Figure 13 Figure 14 Figure 133゜ Figure 19 Figure 20 Figure 21 Figure Figure 22 Figure 23 Figure 24
Figure 25 Figure 26 Figure 27 Figure 29 Figure 30

Claims (1)

[Claims] 1) A U-shaped mounting frame attached to the front side of the circuit breaker installed in the box, and a spacer between the front side of the mounting frame that is guided so as to be able to pivot freely through the through hole provided in the mounting frame. A guide tube having a flange around which a compression spring is wound, a fixture fixed to the mounting frame and pressing the flange to bias the compression spring, and a finger pivotally supported on the guide tube and holding the operating handle at one end. a shaft support cylinder having a large diameter portion fixed to the other end and loosely fitted into a guide hole having a larger diameter than the inner diameter of the guide cylinder provided in the fixture;
an operating part consisting of an operating shaft having one end inserted into and fixed to a shaft hole provided in the shaft support cylinder and a joint made of a prismatic body with a truncated conical tip fixed to the other end; A through hole provided in the door of the box body located on the axis, a decorative frame fixed to the front side thereof, and an external handle that is pivotally supported by the decorative frame with axial movement restraint and has a coupling hole that is detachable from the joint. A handle operating device for a circuit breaker, comprising: a handle portion consisting of: