JPS645787Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a periodic operation switch in which the operating angle shaft is rotated to the closed position only after passing through the open position.

Safety is important when making and tripping operations such as circuit breakers, etc., and it is necessary to avoid direct closing operations.
It is required that the closing operation cannot be performed until the tripping operation has been performed once. Therefore,
In order to ensure the above-mentioned safety, this invention is a switch equipped with an operating angle shaft that automatically returns to the neutral position from the open or closed position. It was developed with the purpose of providing a periodic operation switch that can only be rotated after a period of time.

Hereinafter, the present invention will be described in detail based on specific embodiments shown in the accompanying drawings.

The switch shown in this embodiment comprises a switching mechanism section 1, a contact contact section 2, a periodic operation section 3, and an operating angle shaft 4 passing through these sections. The operating angle shaft 4 has one end rotatably provided on the outer wall of the housing of the contact contact part 2 and a middle part on the outer wall of the housing of the periodic actuating part 3 via bearings, and the other end protrudes forward from the periodic actuating part 3. Attach the handle (not shown). In the switching mechanism section 1, a notch cam is fixed to an operating angle shaft 4 inserted into the housing.
A roller biased by a spring is brought into contact with the notch cam, and after the operating angle shaft 4 is rotated to the open or closed position, the rotation is automatically returned to the neutral position. In addition, in the contact contact section 2, a contact cam is fixed to the operating angle shaft 4, and a movable rod that is biased by a spring and moves together with the movable contact is brought into contact with the contact cam, and by rotating the operating angle shaft 4 in one direction, the circuit is closed. It is configured to open the circuit by rotating it to the other side.

In the present invention, in order to ensure the safety of the closing operation of circuit breakers, etc., the operating angle shaft is configured to rotate to the closing position only after passing through the opening position.

In this example, rotation to the right in the figure is the closing position, and rotation to the left is the opening position, but conversely, rotation to the right is the opening position, and rotation to the left is the opening position. It is free to set the motion as the closed position.

Although the operating angle shaft 4 has a square outer peripheral surface in this embodiment, it goes without saying that the outer circumferential surface thereof is not limited to this, and other square shapes are also included in the present invention.

The stopper cam 5 is plate-shaped and has an outer circumferential surface formed with a sliding circular arc surface 6 and a supporting circular arc surface 7 having a smaller diameter than the sliding surface 6, and engagement step portions 8, 8 are formed in continuous portions of both surfaces 6, 7.
In this embodiment, the support arcuate surface 7 is formed over 90 degrees because the operating angle shaft 4 rotates 45 degrees left and right. This stopper cam 5 has a square hole 9 drilled in its center, is fitted onto the operating angle shaft 4, and is fixed via an E-ring, collar, etc.

The lockout cam 10 is plate-shaped and has an outer circumferential surface smaller in diameter than the supporting arcuate surface 7 of the stopper cam 5, and has a protruding cam piece 12 having a larger diameter than the sliding arcuate surface 6 of the stopper cam 5 and having a supporting flat surface 11 at its tip. do. This lockout cam 10 is connected to the operating angle axis 4.
so that it can be rotated back after being engaged for 45 degrees.
A control hole 13 is drilled in the center, and the operating angle shaft 4 is fitted onto the outside. The control hole 13 is formed by overlapping a square hole into which the operating angle shaft 4 is fitted, with the phase shifted by 45 degrees, and furthermore,
The fan-shaped parts formed between the apexes of the eight-pointed star and the inscribed circle are alternately deleted, and the outline straight part 1
4 to engage the outer circumferential surface of the operating angle shaft 4 to form the contour arc portion 1
In No. 5, the operating angle shaft 4 is set so that it rotates independently without engaging the outer circumferential surface during return rotation.

The lock plate 16 has a substantially rectangular plate shape and is perpendicular to the operating angle shaft 4. The lock plate 16 is a housing 1 that accommodates the stopper cam 5 and the lockout cam 10 and is attached to the front surface of the switching mechanism section 1 through which the operating angle shaft 4 is inserted and projected.
The upper protruding piece 20 and the lower protruding piece 21 are fitted into the slide grooves 18 and 19 on the upper and lower walls of the housing 7 and are arranged to be slidable in the vertical direction. A lock piece 22 is vertically erected on the upper part of the lock plate 16 and positioned on the outer circumferential surface of the stopper cam 5 and the lockout cam 10. A spring 24 is attached to the locking piece 23 formed in the housing 17 and the lower wall of the switching mechanism unit 1 housing, and the locking piece 22 is directed downward and abuts against the outer peripheral surfaces of the stopper cam 5 and the lockout cam 10. to energize it.

Next, the effect will be explained.

One cycle of operation is shown in FIGS. 3 to 7.
In FIG. 3, the locking piece 22 of the locking plate 16 is urged downward by the spring 24 and is placed on the supporting arcuate surface 7 of the stopper cam 5, and is located at the engagement step 8, and furthermore, the camming piece 1 of the lockout cam 10 is placed on the supporting arc surface 7 of the stopper cam 5.
The locking piece 25 is placed on the base end of a cam surface 25 formed into a curved surface on the left side of the cam surface 2.
It is held between 5 and 5. Moreover, the operating angle axis 4
The outer peripheral surface is locked in the neutral position.
It is engaged with the contour straight portion 14 of the control hole 13 of No. 0 so as to be rotatable to the left. In FIG. 3, the operating angle shaft 4 is also stopped at the neutral position, and even if the operating angle shaft 4 is rotated to the right, the engagement step 8 of the stopper cam 5 cannot be rotated to the right, that is, to the closed circuit position. Since it collides with the locking piece 18 and cannot be rotated, it cannot be operated.When the operating angle shaft 4 is rotated to the left, the lockout cam 10 is also moved to the left along with the stopper cam 5. can rotate. As the lock piece 22 continues to rotate to the left, it slides on the cam surface 25,
When rotated through 45 degrees, it rests on the support plane 11 at the tip (see Figure 4). The locking piece 22 is urged downward by a spring 24 and the support plane 11
Although the lock piece 22 is placed in a pressed state on top of the support plane 11, the reaction force from the switching mechanism section 1 and the contact contact section 2 during the switching operation is transmitted to prevent the lock piece 22 from falling off the support plane 11 due to vibration. A protrusion 26 is provided at a continuous portion with the cam surface 25. Turn the operating angle axis 4 to the left
When the turning force is released after turning 45 degrees, the operating angle shaft 4 automatically returns to the neutral position by the operation of the switching mechanism 1 (see Fig. 5). At this time, the operating angle shaft 4 rotates to the right, but the control hole 1 of the lockout cam 10
3, only the operating angle shaft 4 rotates 45 degrees without engaging with the contour straight part 14 of the lockout cam 10, and the stopper cam 5 rotates 45 degrees to the right in the same manner as the operating angle shaft 4 while the lockout cam 10 remains as it is. The sliding arcuate surface 6 is located near the locking piece 22. In this state (FIG. 5), the locking piece 22 can be freely rotated to the left, ie, into the open position, with the locking piece 22 resting on the support plane 11. Subsequently, when the operating angle shaft 4 is rotated to the right, the stopper cam 5 and the lockout cam 10 are also rotated to the right together with the operating angle shaft 4, and the locking piece 22 engages with the protrusion 26 of the support plane 11.
is placed on the sliding arcuate surface 6 of the stopper cam 5 (see FIG. 6). After rotating the operating angle shaft 4 by 45 degrees to the right and releasing the rotational operating force, the operating angle shaft 4
automatically returns to the neutral position by the operation of the switching mechanism section 1 (see Fig. 7). At this time, the operating angle shaft 4 rotates to the left, but the straight line portion 14 of the lockout cam 10 is rotated within the control hole 13 of the lockout cam 10.
Only the operating angle shaft 4 rotates 45 degrees without engaging with the operating angle shaft 4, and the stopper cam 5 rotates 45 degrees to the left in the same manner as the operating angle shaft 4, while the lockout cam 10 remains as it is.
The locking piece 22 slides on the sliding arcuate surface 6, falls onto the support arcuate surface 7, is placed on the engagement step 8, is placed on the base end of the cam surface 25 of the lockout cam 10, and is locked. The piece 22 includes the engagement step 8 and the cam surface 25
The state is the same as that shown in FIG. This cam switch can be operated from the stopped state shown in Figures 3 and 7 to the left, that is, to the open position, but cannot be rotated to the right, that is, to the closed position. First, after rotation to the open position, rotation to the closed position is possible, and rotation from the neutral position to the open position is possible in any state.

Although the present invention has been described with reference to an embodiment of the attached drawings, it is possible to arrange the periodic operation section 3 not only in the front part of the switching mechanism section 1 but also in the front section of the contact contact section 2, or to arrange the periodic operation section 3 and the switching mechanism. The present invention also includes housing the parts 1 in the same housing. Further, the housing 17 may be a frame body on which the lock plate 16 slides, and the spring 24 is limited to the illustrated mounting example as long as the spring 24 biases the lock piece 22 in the direction of the outer peripheral surface of the stopper cam 5 and the lock out cam 10. It's not something.

The present invention has the above-mentioned configuration, and has a periodic operation in which the operating angle shaft rotates to the closing position only after passing through the open position, so safety during the closing operation can be ensured.

[Brief explanation of the drawing]

The drawings show a specific embodiment of the present invention; FIG. 1 is a perspective view showing its outline, FIG. 2 is an enlarged front view of the main parts, and FIGS. 3 to 7 are front views showing cyclic operation states. Figure 3 shows the stopped state, Figure 4 shows the operating angle axis rotated to the left, Figure 5 shows the operating angle axis returned to the neutral position, and Figure 6 shows the operating angle axis turned to the right. FIG. 7 shows a state in which the operating angle axis has returned to the neutral position and stopped. 4... Operating angle shaft, 6... Sliding circular arc surface, 7... Supporting circular arc surface, 8... Engaging stepped portion, 5... Stopper cam, 11... Support plane, 12... Cam piece, 10...
...Lock outcome, 16...Lock plate,
22...Lock piece, 24...Spring.

Claims (1)

[Scope of utility model registration request] The switch is equipped with an operating angle shaft that automatically rotates back from the open or closed position to the neutral position, and the outer circumferential surface is formed by a sliding circular arc surface and a supporting circular surface with a smaller diameter than the said surface, so that both sides are continuous. A stopper cam, which has an engagement step formed on its part, is externally fitted and fixed to the operating angle shaft, and further, an outer circumferential surface is formed with a smaller diameter than the supporting arc surface of the stopper cam, and a tip thereof is formed with a diameter larger than the sliding arc surface of the stopper cam. The lockout cam, which has a protruding cam piece formed on the support plane, is engaged at a predetermined angle and fitted onto the operating angle shaft so that it can return after rotation, and the lock plate can be slid perpendicularly to the operating angle shaft. A lock piece protruding from the lock plate is positioned on the outer peripheral surface of the stopper cam and the lockout cam, and a spring is provided so as to bias the lock plate in a direction in which the lock piece comes into contact with the outer peripheral surface. A periodic operation switch that rotates to the closed position only after passing through the open position.