JPH0544992Y2 - - Google Patents

Description

[Detailed Description of the Invention] A. Field of Industrial Application This invention relates to an operating mechanism for a shear cutter that can perform manual input, shear cutoff, and electrical cutoff.

B. Outline of the invention This invention is a breaker that operates a movable contact via a link mechanism by manually operating an operating lever, in which an electrical breaker is connected to the link mechanism.
The structure allows the link mechanism to be operated based on a predetermined signal to switch the movable contact to the OFF position, and in particular, by providing a pilot hook and a return spring,
In addition to manual operation, this allows electrical disconnection, and also enables the use of a small-force trip coil.

C. Conventional technology Conventionally, the operating mechanism for this type of breaker is as follows:
It is known that a manually operated operating lever is linked to a movable contact via an appropriate link mechanism.

D. Problems that the invention aims to solve However, in the case of such conventional examples,
In order to automatically shut off the shear when an inconvenience such as a current leakage or failure occurs, a separate electrical shear cut-off device must be prepared, which poses the problem of requiring equipment costs.

Further, there is a problem in that the electric shredder, which has once been cut off, must be reset separately from the manual shredder mechanism in order to be able to operate again.

This invention was devised by focusing on such conventional problems, and has an operating mechanism for a shear breaker that allows for manual operation and electrical disconnection, and is also capable of automatic reset. The aim is to obtain the following.

E. Means for Solving the Problem This invention consists of first and second main shafts 1 and 2 and movable contacts that are arranged in parallel at fixed positions with a predetermined interval and are rotatable about a central axis. 21
A third main shaft 3 connected via a link mechanism 22 to
and an operating section 4 which is integrally provided with the first main shaft 1 and extends in three directions perpendicular to the first main shaft 1.
a, a cam portion 4b, an operating lever 4 formed so that the arm portion 4c protrudes, and a guide portion having a predetermined length, one end of which is pivotally supported by the free end of the arm portion 4c, and the other end extending in the longitudinal direction; 5a, one end is slidably engaged with the guide portion 5a, the other end is integrally fixed to the second main shaft 2, and the operating portion 4a is in an ON state position and an OFF state position. an arm rod 6 that engages with the end of the guide portion 5a and rotates as the arm rod 6 moves; and a stopper that is fixed to the second main shaft 2 and rotates in conjunction with the rotation of the arm rod 6. A trip hook 7 having a portion 7 a and a hook portion 7 b has an intermediate portion fixed to the third main shaft 3 and is connected to one end of a compressed return spring 8 , and the other end is connected to a first swing link 9 . an actuating lever 10 pivotally supported at one end; a second swing link 11 having one end pivotally supported at the other end of the first swing link 9; a third swinging link 12 which is pivoted and whose other end is pivoted at a predetermined position; and the first and second swinging links 9, 1.
1, which engages the tip of the cam portion 4b when the operating portion 4a is in the ON state position, and moves toward the first spindle 1 side when the operating portion 4a is in the OFF state position. 1 roller follower and the second and third swing links 11 and 12. When the operation section 4a is in the ON position, it engages the tip of the stopper section 7a, and the operation section 4a is turned OFF. A second roller follower 14 that moves toward the second main shaft 2 when in the state position, a third roller follower 15 provided at the other end of the return spring 8, and a third roller follower 15 provided at the other end of the return spring 8. It has an operation protrusion 16 that can be engaged with the hook portion 7b, a stopper lever 17 that engages with the third roller follower in an ON state, and a hook lever 18 that is longer than the stopper lever 17. A pilot hook 19 is constantly biased so as to return to the position where it engages with the roller follower in an ON state, and a trip coil that operates the foot lever 18 based on a predetermined signal to enable the stopper lever 17 to be detached from the third roller follower 15. Its structure consists of 20.

F Effect When the operating lever 4 is switched between the OFF state position and the ON state position, the guide link 5 moves to the left or right, and at this time, the end of the guide part 5a is engaged with the locking part of the arm rod 6. Then, the arm rod 6 is rotated. The second main shaft 2 is rotated by rotation of the arm rod 6, and causes the stopper portion 7a to engage and disengage from the second roller follower 14.

Further, the return spring 8 biases the operating lever 10 and transmits the biasing force to the first swing link 9, the second swing link 11, and the third swing link 12. is the first roller follower 13
It regulates the position of The operating lever 10 rotates depending on the state of the stopper portion 7a and the cam portion 4b, and the third main shaft 3 rotates accordingly, causing the link mechanism 2 to rotate.
2, the movable contact 21 is actuated.

When the operating lever 4 is in the ON position, when the trip coil 20 is excited based on a predetermined signal, the hook rod 18 of the pilot hook 19 is pushed, and the stopper rod 17 is disengaged from the third roller follower 15. The operation protrusion 16 is urged by the return spring 8 to rotate the hook portion 7b. Accordingly, the stopper portion 7a separates from the second roller follower 14, and the second roller follower 14
moves toward the second main shaft 2 to rotate the operating lever 10, and the movable contact 21 is switched to the OFF position via the third main shaft 3 and the link mechanism 22.

In this state, when the operating lever 4 is moved to the OFF position, the pilot hook 19 is reset to its original position by the biasing force and can be operated again.

G. Embodiment Hereinafter, an embodiment will be described in which details of the operation mechanism of the shear cutter according to this invention are shown in the drawings.

In the figure, 1, 2, and 3 are a first main shaft, a second main shaft, which are arranged in parallel at fixed positions with predetermined intervals, respectively.
This is the third main axis.

The first main shaft 1 is integrally provided with an operating lever 4 formed such that an operating section 4a, a cam section 4b, and an arm section 4c project in a direction perpendicular to the main shaft 1. .

One end of a guide link 5 is pivotally supported at the free end of the arm portion 4c.
The other end side is provided with a guide portion 5a in which a guide hole of a predetermined length extending in the longitudinal direction is formed.

The second main shaft 2 also has a trip hook 7 formed with a stopper portion 7a, a hook portion 7b, and an arm rod 6.
is integrally provided, and the free end of the arm rod 6 is provided with an engaging pin 7c that slidably engages with the guide hole of the guide portion 5a, and the operating portion 4a is in the ON state. As the arm rod 6 moves to the OFF position and the OFF state position, the arm rod 6 engages with both ends of the guide portion 5a and rotates. Moreover, the free end of the stopper portion 7a is connected to the operating portion 4a.
is set to engage a second roller follower, which will be described later, when is in the ON state position.

The third main shaft 3 is operatively connected to a movable contact 21 of the movable part A via a link mechanism 22.

Further, the third main shaft 3 is integrally provided with an actuation lever 10 at its intermediate portion.
0 is pivotally supported on one end side of a compressed return spring 8. One end of the first swing link 9 is connected to the other end of the lever 10, and one end of the second swing link 11 is connected to the other end of the first swing link 9. The third swing link 12 is at the other end.
One end of each is pivotally connected in turn. Note that the other end of the third swing link 12 is pivotally supported at a fixed position (operation box a).

A first roller follower 13 is provided at the connection portion between the first and second swing links 9 and 11, and a second roller follower 13 is provided at the connection portion between the second and third swing links 11 and 12. 14 are provided.

The first roller follower is configured such that the operating section 4a is
When in the ON state position, the second roller follower 14 engages with the tip of the cam portion 4b, and as described above, when the operating portion 4a is in the ON state position, the second roller follower 14 engages with the tip of the stopper portion 7a. is set to.

An operating protrusion 16 and a third roller follower 15 are provided on the other end side of the return spring 8.

Further, a trip coil 20 is disposed on the side of the return spring 8.
When the iron core 20a is excited, the iron core 20a protrudes.

In the figure, reference numeral 19 denotes a pilot hook, which is formed so that a stopper rod 17 and a hook rod 18 form a substantially right angle, and is pivotally supported at a fixed position (on the operation box a side) at a bent portion. In the normal state, the tip of the stopper rod 17 is set to engage the third roller follower 15, and the pilot hook 19 is provided with a biasing force (not shown) that always returns to the normal state position. It is given by a spring.

In such a configuration, the operation section 4a
When in the ON state position, the trip hook 20
When energized, the iron core 20a protrudes and pushes the hook rod 18, and accordingly the stopper rod 17 is disengaged from the third roller follower 15, releasing the restriction on the return spring 8 from expanding.

Each state of the operating lever 4 and trip coil 20 will be explained below with reference to the drawings.

FIG. 2 shows a state in which the operating portion 4a is in the ON state position, and FIG. 3 shows a state in which the operating portion 4a is moved from the same state to the OFF state position.

That is, in FIG. 2, the stopper portion 7a
engages with the second roller follower 14 to restrict movement of the second roller follower 14 toward the second main shaft 2 side. Further, the cam portion 4b engages with the first roller follower 13 and restricts movement of the first roller follower 13 toward the first main shaft 1 side.
Therefore, the operating lever 10 is fixed, and the movable contact 21 is also held at the ON position accordingly.

Next, in the process of moving to FIG.
is pushed up to the OFF state position, the guide link 5 moves to the left in the drawing, and the guide part 5a
The right end portion of the arm lever 6 hits the engagement pin 7c, and the arm rod 6 pivots to rotate the second main shaft 2 clockwise. At the same time, the stopper portion 7a is moved to the second roller follower 1.
Leave from 4. Then, the second roller follower 14 moves toward the second main shaft 2 side. On the other hand, since the cam portion 4b has already been removed, the first roller follower 13 has moved toward the first main shaft 1 (due to the biasing force of the return spring 8). Therefore, the third main shaft 3 is
It rotates together with the operating lever 10 and moves the movable contact 21 to the OFF position via the link mechanism 22.

Next, Figures 4 to 6. Operation unit 4a is ON
The state in which the trip coil 20 is excited in the state (closed state) is shown in a time sequence.

That is, FIG. 4 shows the normal state, and FIG. 5 shows the state immediately after the trip coil 20 is excited, and the stopper rod 17 is detached from the third roller follower 15 and the operating protrusion 16
The hook portion 7b is pushed, the stopper portion 7a is separated from the second roller follower 14, and the second roller follower 14 is enabled to move toward the second main shaft 2 side. FIG. 6 shows that the movement of the second roller follower 14 is completed, the operating lever 10 is rotated, and the third roller follower 14 is moved.
The movable contact 21 is connected to the main shaft 3 via the link mechanism 22.
It shows the state moved to the OFF position.

Next, in FIGS. 7 to 9, the operation section 4a is
The figure shows how the state changes over time when moving from the OFF state (shrinking state) position to the ON state (throwing state) position.

First, FIG. 7 shows a state in which the operating portion 4a is in the OFF state, and FIG. 8 shows a state immediately after force is manually applied to the operating portion 4a from the same state. . In this state, the cam portion 4b pushes the first roller follower 13, causes the operating lever 10 to rotate clockwise, and the movable contact 2
1 is driven toward the ON position.

FIG. 9 shows a state in which the rotation of the operating lever 10 has been completed and the movable contact 21 has finished moving to the ON position.

In addition, in the figure, 23 is the first roller follower 13
The stopper 24 is a pin that prevents the trip hook 7 from over-rotating.

Although the embodiment has been described above, various other design changes are possible. For example, in the above embodiment, the arm rod 6 and the trip hook 7 are integrally formed, but they may be formed separately. Of course, the ON state position and the OFF state position of the operating section 4a can be changed as appropriate by changing the link mechanism 22 and the like.

H. Effects of the invention As is clear from the above explanation, the operating mechanism for the shear cutter according to this invention combines a mechanism for manually operating the operating lever and a mechanism for electrically cutting off the cutter, and By configuring the reset state so that it can be easily performed manually, there is an effect that the operation becomes simple.

Further, if a trip command is generated in the closed state, the switch can be electrically turned off automatically.

Furthermore, by setting the pilot hook to be longer than the stopper lever, even a small capacity (small force) trip coil can be easily broken, and the energized Since the first, second, and third swing links and the operating lever are used, there is an effect of reducing costs.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view showing one embodiment of the operating mechanism of the shear cutter according to the invention, FIGS.
, 5 and 6 are explanatory diagrams showing a state in which the electrical discontinuation is performed, and FIGS. 7, 8, and 9 are explanatory diagrams showing a state in which charging is performed manually. be. 1, 2, 3...1st, 2nd, 3rd main axis, 4...
Operation lever, 4a...operation section, 4b...cam section,
4c...Arm part, 5...Guide link, 5a...
...Guide portion, 6...Arm rod, 7...Trip hook, 8...Return spring, 9...First swing link, 1
0... Actuation lever, 11... Second swing link, 1
2...Third swing link, 13...First roller follower, 14...Second roller follower, 15...Third roller follower, 16...Operation protrusion, 17...
Stop lever, 18... Foot lever, 19... Pilot lever, 20... Trip coil, 21...
Movable contact, 22... link mechanism.

Claims (1)

[Scope of utility model registration request] arranged in parallel at fixed positions through predetermined intervals,
A third main shaft 3 is rotatable about the central axis and is connected to the first and second main shafts 1 and 2 and the movable contact 21 via a link mechanism 22, and a third main shaft 3 is provided integrally with the first main shaft 1. The operating lever 4 is formed such that an operating section 4a, a cam section 4b, and an arm section 4c protrude in three directions perpendicular to the first main shaft 1, respectively, and a free end of the arm section 4c. A guide link 5 is pivotally supported at one end and has a guide portion 5a having a predetermined length extending in the longitudinal direction on the other end side, one end is slidably engaged with the guide portion 5a, and the other end is connected to the second main shaft. an arm rod 6 that is integrally fixed to the guide section 2 and rotates by engaging an end of the guide section 5a as the operating section 4a moves to the ON state position and the OFF state position; and the second main shaft. a stopper part 7 fixed to 2 and rotating in conjunction with the rotation of the arm rod 6;
a trip hook 7 having a hook portion 7b and a hook portion 7b.
and an operating lever 10 whose intermediate portion is fixed to the third main shaft 3, whose one end is connected to one end of the compressed return spring 8, and whose other end is pivotally supported by one end of the first swing link 9. a second swing link 11 having one end pivoted to the other end of the first swing link 9; one end pivoting to the other end of the second swing link 11, and the other end in a predetermined position. Pivotally supported third swing link 12
is provided at the connecting portion of the first and second swing links 9 and 11, and when the operating portion 4a is in the ON state position, it engages the tip of the cam portion 4b, and the operating portion 4a is in the OFF state. Provided at a connecting portion between a first roller follower that moves toward the first spindle 1 side when in the position, and the second and third swing links 11 and 12,
When the operating portion 4a is in the ON state position, it engages the tip of the stopper portion 7a, and the operating portion 4a
The second roller follower 14 that moves toward the second spindle 2 when in the OFF state position and the return spring 8
Third roller follower 15 provided at the other end
an operating protrusion 16 provided at the other end of the return spring 8 and capable of engaging with the hook portion 7b;
A stopper rod 17 that engages the roller follower in the ON state and a hook rod 1 that is longer than the stopper rod 17
8 and which is constantly biased so that the stopper lever 17 returns to the position where it engages with the third roller follower in an ON state, and the pilot hook 19 is actuated based on a predetermined signal to make the stopper. An operating mechanism for a sheath breaker characterized by comprising a trip coil 20 that allows a rod 17 to be detached from a third roller follower 15.