JPH0620563A - Linkage of switch - Google Patents

Abstract

PURPOSE:To reduce the number of part items of a linkage and miniaturize a switch by simplifying a connecting structure between each link and a lever. CONSTITUTION:A pin 33 is rotatably erected between the lower ends of connecting links 32. Both ends of the pin 33 are made to abut to the respective opposite side faces of right and left support plates 3, 4, and make sliding contact on a predetermined track on the respective opposite side faces of the right and left support plates 3, 4 when the connecting links 32 move. The pin 33 is thus made to constantly abut to the respective opposite side faces of the right and left support plates 3, 4, so as to prevent the pin 33 from disengaging from the connecting links 32.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a switch link mechanism.

[0002]

2. Description of the Related Art Conventionally, a switch has been driven by a manually operated handle or a solenoid to open and close an open / close portion provided in the switch. A link mechanism is generally connected between the manual operation handle and the opening / closing portion and between the solenoid and the opening / closing portion.

The lever and the link, or the link and the link of the conventional link mechanism are connected by penetrating the pins at their ends. A flange or the like is provided at one end of the pin to prevent the pin from coming off, and a split pin is penetrated in the orthogonal direction to the other end protruding from the link or the lever to prevent the pin from coming off.

[0004]

However, in the conventional link mechanism, the pin connecting the link and the lever has an insertion hole through which the end of the pin projects from the lever and the link and the split pin is inserted into the projecting portion. In addition to the need for machining and the increased labor for inserting the split pins, it was necessary to increase the space occupied by the link mechanism only in the protruding portion.
Also, in recent years, there has been a demand for miniaturization of switches,
Although it is inevitable to make this link mechanism smaller,
It has been difficult to reduce the size of the conventional link mechanism due to the above reasons.

An object of the present invention is to provide a link mechanism for a switch which can reduce the size of the link mechanism and reduce the number of parts and the number of assembling steps of the link mechanism.

[0006]

In order to achieve the above object, according to the present invention, the drive source and the opening / closing portion are connected by a link mechanism so that the opening / closing portion can be opened and closed, and the link mechanism is supported. In the link mechanism of the switch supported by the plate,
Pins are used to connect the levers and links that make up the link mechanism, and links are used to connect the links. The gist is that the support plate is used to prevent the pin from coming off.

[0007]

Since the link and the lever adjacent to the support plate or the pin connecting the link and the link are arranged so as to be slidable on the support plate, the pin does not come out of the link and the lever or the link and the link.

Further, unlike the conventional case, since it is not necessary to use the split pins, the number of parts and the number of assembling steps are reduced.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is embodied in a switch which is manually opened and closed will be described with reference to FIGS.

As shown in FIG. 1, a link mechanism 2 is arranged on one side of the switch case 1. As shown in FIG. 7, the link mechanism 2 is supported by a pair of support plates 3 and 4 fixed to the switch case 1. The link mechanism 2 will be described below. The supporting plate located on the left side in FIG. 7 is referred to as the left supporting plate 3, and the supporting plate located on the right side is referred to as the right supporting plate 4. Further, the side on which most of the link mechanism 2 is arranged (left side in FIG. 7) with the right support plate 4 as a boundary is called a mechanism section side, and the opposite side (right side in FIG. 7) is called an opening / closing section side.

The left support plate 3 is fixed by a pair of bolts 5 planted in the switch case 1 penetrating the mounting holes 3a, 3b and tightening a nut 6. A leg piece 3c is bent and formed at a necessary portion of the left support plate 3 toward the switch case 1 side, and when the nut 6 is tightened and fixed, the leg piece 3c connects the main body of the left support plate 3 and the switch case 1 to each other. To obtain a predetermined gap. As shown in FIG. 9, a fixed shaft support hole 7 is provided in the upper part of the left support plate 3, an operation shaft support hole 8 is located slightly obliquely below the fixed shaft support hole 7, and a fixed shaft support for a lock lever is provided in the central portion. A fixed shaft support hole 10 for supporting a trip lever is provided through the hole 9 and a lower portion thereof.
Since the right support plate 4 is also provided with the support holes similarly to the left support plate 3, the left support plate 3 is provided in the support holes for attaching the same shaft as shown in FIG. 8 for convenience of description. The same reference number as the support hole of.

An operation shaft 11 is penetratingly supported in the operation shaft support hole 8. The operation shaft 11 penetrates through the switch case and has an outer end protruding outside the switch case 1, and a manual operation handle 12 is fixed to the protruding part. Further, the inner end of the operation shaft 11 is rotatably passed through the operation shaft support hole 9 of the right support plate 4. Both ends of the fixed shafts 13, 14, 15 are penetratingly supported in the fixed shaft support holes 7, 9, 10 of the left and right support plates 3, 4, respectively. A retaining member 16 having a retaining flange that comes into contact with the side surfaces of the support plates 3 and 4 is screwed onto the end surfaces of the fixed shafts 13, 14 and 15. Therefore, the right support plate 4 is integrally connected to the fixed shafts 13, 14, 15 so as to be integrated with the left support plate 3.

An opening / closing shaft support hole 1 is provided below the right support plate 4.
7, the opening / closing shaft 18 is rotatably installed between the opening / closing shaft support hole 17 and the other side of the switch case 1. By rotating the open / close shaft 18 back and forth, an open / close portion (not shown) provided in the switch case 1 can be opened / closed.

A rotary lever 19 is fixed to an inner end of the operation shaft 11 which projects from the right support plate 4 as shown in FIG. A sliding pin 2 is attached to the tip of the turning lever 19.
0 is projected. As shown in FIG. 8A, a step portion 21 projecting toward the opening / closing portion is formed at a position lower than the operation shaft support hole 8 of the right support plate 4 and above a central portion on one side. A shaft hole 22 is transparently provided in the step portion 21. A spring support plate 23 is rotatably supported by a shaft 24 in the shaft hole 2 on the side surface of the right support plate 4 on the opening / closing side.

An elongated hole 25 extending in the longitudinal direction is provided in the vicinity of the tip of the spring support plate 23, and the elongated hole 25 is formed.
A sliding pin 20 of the rotating lever 19 is slidably inserted in the. A locking pin 26 protruding toward the mechanism portion is fixed to the tip of the spring support plate 23, and one end of a force accumulation spring 27 is locked. Then, the spring support plate 23 is rotated within a range in which the locking pin 26 of the rotating lever 19 is allowed to move with respect to the elongated hole 25 in a closed state shown in FIG. 2 or a trip state shown in FIG. 6 to an open state shown in FIG. It is possible to move.

As shown in FIG. 11, a pair of actuating levers 28, which are spaced apart from each other, are rotatably penetrated through the operating shaft 11 between the left and right support plates 3 and 4. Circular arc-shaped elongated holes 29, 30 are provided in the upper part of the left and right support plates 3, 4 so as to surround the operation shaft support hole 8 and are arranged in a V shape. A connecting shaft 31 is installed between one ends of both operating levers 28, and both ends of the connecting shaft 31 are slidably penetrated through the elongated holes 30. In the connecting shaft 31, a pair of connecting links 32 is loosely inserted between the operating lever 28 and each of the support plates 3 and 4, and a bulge portion 33 is formed between the operating levers 28 so as to have an enlarged diameter.

A pin 33 is rotatably installed between the lower ends of the connecting links 32 as shown in FIG. Pin 3
Both ends of 3 are brought into contact with the opposite side faces of the left and right support plates 3 and 4, and when the connecting link 32 is moved, the opposite side faces of the left and right support plates 3 and 4 are shown in FIGS. 8A and 9A. It is designed to be in sliding contact with the locus indicated by the chain double-dashed line α. That is, the pin 33 is always in contact with the opposite side surfaces of the left and right support plates 3 and 4 to prevent the pin 33 from coming off from the connecting link 32. In the center of the pin 33, the spring receiving plate 3
4 is rotatably supported. The other end of the force accumulation spring 27 is hooked on the pin 33 via the spring receiving plate 34.

The central portion of the fixed shaft 13 is enlarged between the left and right support plates 3 and 4, and the first regulation is performed on the fixed shaft 13 between the enlarged diameter portion and the left and right support plates 3 and 4. Links 35a and 35b are rotatably supported. A pair of second regulation links 37 is rotatably connected to the inner side surfaces of the first regulation links 35a, 35b facing each other by a shaft 38 fixed to the second regulation link 37. As shown in FIG. 10, the connecting position of the second restriction link 37 and the first restriction link 35b is located outside the side edge of the left support plate 3. Further, the connecting position of the second restriction link 37 and the first restriction link 35a is a position separated from the inner surface of the step portion 21 of the right support plate 4.

The other end of each second regulation link 37 has the pin 3
3 is rotatably supported between the spring receiving plate 34 and the connecting link 32. A projecting piece 19a is provided at the upper center of the rotating lever 19. A pressing roller 36 is provided on the shaft projecting from the projecting piece 19a toward the mechanism section.
Is rotatably fitted to the outside and is arranged so as to be able to come into contact with one side of the first regulation link 35a.
A is pressed counterclockwise.

A connecting shaft 39 is provided between the other ends of the operating levers 28, and both ends of the connecting shaft 39 are slidably penetrated through the elongated holes 29. The coupling shaft 39 has a pair of ring-shaped spacers 40 loosely inserted between the operating lever 28 and the support plates 3 and 4. Further, the connecting shaft 39 has a bulging portion 41 formed between the operating levers 28 so as to have an enlarged diameter.
8 is restricted from moving in the axial direction of the connecting shaft 39.

A pressing rod 43 is driven and fixed to the operating shaft 11 below the operating levers 28, and its tip is located below the connecting shaft 39.
When the operating shaft 11 rotates in the opening direction from the closed state of FIG. 1, the pressing rod 43 rotates integrally and presses the connecting shaft 39 located on the rotation locus in the opening direction. It is possible.

One end of the connecting shaft 39 protruding toward the opening / closing portion is connected to the upper end of the operating link 42. The lower end of the operation link 42 is connected to the drive lever 44 of the opening / closing shaft 18. Therefore, when the operating lever 28 reciprocally rotates around the operating shaft 11, the opening / closing shaft 18 is driven to open / close via the connecting shaft 39, the operating link 42, and the drive lever 44 to open / close the opening / closing portion. An operating bolt 45 is radially screwed to the opening / closing shaft 18. Operating bolt 45
When the opening / closing shaft 18 is closed and rotated, it can come into contact with the actuator 46a of the limit switch 46 fixed to the lower side surface of the right support plate 4 on the opening / closing side.

Next, the trip mechanism T will be described.
A trip coil 47 is provided on the lower portion of the side surface of the right support plate 4 on the mechanism side.
Is fixed. Plunger 4 of trip coil 47
A lower end of a trip lever 49 rotatably supported by a fixed shaft 15 is swingably connected to the shaft 8. The trip lever 49 is formed in a reverse channel shape, and a projecting piece 51 is formed from the side edge of the trip lever 49 so as to be located above the trip coil 47. A substantially horizontal L-shaped locking recess 52 is formed in the lower portion of the tip of the projecting piece 51, and a retracting portion 53 is recessed in the lower portion of the base end.

The fixed shaft 15 has a twist coil spring 50.
, One end of which is engaged with the trip coil 47 and the other end of which is engaged with the upper edge of the projecting piece 51 of the trip lever 49.
The trip lever 49 is always urged to rotate counterclockwise in FIG.

A lock lever 54 is rotatably supported on the fixed shaft 14. The lock lever 54 is formed in a substantially channel shape from both side plate portions and a connecting plate connecting the both side plate portions, and both side plate portions penetrate the fixed shaft 14. A twist coil spring 55 is wound around the fixed shaft 14, one end of which is inserted and locked in one side plate portion, and the other end of which is locked by a locking pin 56 which is driven and fixed to the right support plate 4, and a lock lever. 54 is always urged to rotate counterclockwise in FIG.

A pair of shafts 57 and 58, which are spaced apart from each other by a predetermined distance, are connected and fixed between the upper portions of both side plate portions of the lock lever 54. A roller 59 is fitted onto the shaft 57. or,
A shaft 60 is connected and fixed between the lower portions of both side plate portions of the lock lever 54. A roller 61 is fitted on the shaft 60.
Then, in the closed state of the switch shown in FIG. 1 and in the open state of the switch shown in FIG.
The roller 61 is locked by the locking recess 52.

Further, as shown in FIG. 1, the lower portion of the first regulation link 35a is extended, and a lower end portion of the first regulation link 35a is formed with a hook-like hooking piece 62. And this hanging piece 6
2 is locked to the shaft 57 via the roller 59 of the lock lever 54 in the closed state of the switch and the open state of the switch shown in FIG. Therefore, in the closed state shown in FIG. 1 and the opened state shown in FIG. 3, both restriction links 35a, 35b are not rotatable.

Now, the operation of the link mechanism constructed as above will be described. (Opening from the closed state) FIGS. 1 and 2 show the link mechanism in a state where the opening / closing part of the switch is closed. In this state, the restriction piece 62 of the first restriction link 35a is hooked on the roller 59 of the shaft 57 of the lock lever 54.
The trip coil 47 is demagnetized and the plunger 48 is projected. Further, as shown in FIG. 2, the operating bolt 45 of the opening / closing shaft 18 presses the actuator 46a of the limit switch 46, and a signal indicating the closing is output from the limit switch 46 to a control circuit (not shown).

In this state, when the operating handle 12 is rotated in the opening direction (counterclockwise in FIG. 1), the operating shaft 11 is rotated.
Are rotated in the same direction, and accordingly, the rotation lever 19
Rotate together. Since the spring support plate 23 is pressed counterclockwise by the sliding pin 20 by the rotation of the rotation lever 19, the spring 27 is rotated in the same direction while extending the force accumulation spring 27, that is, while accumulating energy. When the locking pin 26 of the spring support plate 23 exceeds the dead point m connecting the pin 33 and the shaft 38 of the second restriction link 37, the force accumulation spring 27 causes the connecting shaft 31 to move downward via the connecting link 32. Be energized.

As a result, the operating lever 28 is rotated around the operating shaft 11 in the opening direction, and the connecting shaft 39 and the operating link 4 are moved.
The drive lever 44 is rotated in the opening direction (counterclockwise direction in FIG. 1) via 2. By the rotation of the drive lever 44, the opening / closing shaft 18 rotates in the same direction, and the opening / closing portion is opened (see FIGS. 3 and 4). Due to this opening, the operating bolt 45 of the opening / closing shaft 18 separates from the actuator 46a of the limit switch 46 as shown in FIG. 4, so that the limit switch 46 outputs a signal indicating the opening to a control circuit (not shown).

In the closed state, the movable electrode and the fixed electrode of the opening / closing section are welded, and the dead point m
When it cannot be opened only by the accumulated force of the accumulated force spring 27 that has passed downward, the operating lever 28 is still in the closed state of FIG. In such a case, manually operate the handle 1.
2 is further rotated in the opening direction. Then, the operating shaft 11 is rotated in the same direction, and the pressing rod 43 presses from below the connecting shaft 39 in the opening direction, so that the opening / closing part is opened by this manual force.

When the opening operation is performed from the above-described series of closed states, both ends of the pin 33 of the link mechanism 2 slide from the A position to the B position shown in FIGS. Move. (Closed from the open state) FIGS. 3 and 4 show the link mechanism in a state in which the open / close portion of the switch is open.

In this state, when the operation handle 12 is rotated in the closing direction (clockwise in FIGS. 3 and 4), the operation shaft 11 is rotated in the same direction, and accordingly, the rotation lever 19 is integrally rotated. Move. Since the spring support plate 23 is pressed clockwise by the sliding pin 20 by the rotation of the rotation lever 19, the spring 27 is rotated in the same direction while extending the force accumulation spring 27, that is, while storing energy. When the locking pin 26 of the spring support plate 23 exceeds the dead point m that connects the pin 33 and the shaft 38 of the second restriction link 37, the force accumulation spring 2
Since the shaft 33 is pulled by 7, the second regulation link 3
7 is rotated counterclockwise.

As a result, the operating lever 28 is rotated around the operating shaft 11 in the closing direction, and the connecting shaft 39 and the operating link 4 are rotated.
2, the drive lever 44 moves in the closing direction (see FIGS. 3 and 4).
In the clockwise direction). This drive lever 44
The rotation of the open / close shaft 18 causes the open / close shaft 18 to rotate in the same direction, and the opening / closing portion is closed (see FIGS. 1 and 2). By this input,
As shown in FIG. 2, the operating bolt 45 of the opening / closing shaft 18 presses the actuator 46a of the limit switch 46, so that the limit switch 46 outputs a signal indicating closing to a control circuit (not shown).

When the closing operation is performed from the series of open states as described above, both ends of the pin 33 of the link mechanism 2 slide from the B position to the A position shown in FIGS. Move. (Trip operation) When the trip coil 47 is momentarily excited in the closed state shown in FIGS. 1 and 2, the plunger 48 moves to the position shown in FIG.
It moves to the main body side of the trip coil 47 as shown in. The movement of the plunger 48 causes the trip lever 49 to rotate clockwise against the biasing force of the twist coil spring 50. At this time, the lock lever 54 is twisted by the coil spring 5
Since it is urged to rotate counterclockwise by 5, the roller 61 of the lock lever 54 rides over the lower part of the locking recess 52 of the projecting piece 51 and engages with the retracting portion 53, and rotates counterclockwise. To do. As a result, the roller 59 of the lock lever 54 also rotates integrally with the lock lever 54, and the engagement with the locking piece 62 is released.

When the engagement is released, the first restriction links 35a and 35b can freely rotate around the fixed shaft 13, so that the pin 33 causes the force accumulation spring 27 to rotate. The connecting shaft 31 is urged downward via the connecting link 32. As a result, the operating lever 28 is rotated around the operating shaft 11 in the opening direction, and the connecting shaft 39,
The drive lever 44 is rotated in the opening direction (counterclockwise in FIG. 1) via the operation link 42. This rotation of the drive lever 44 causes the opening / closing shaft 18 to rotate in the same direction,
The opening / closing portion is opened (see FIGS. 5 and 6).

Since the trip coil 47 is instantaneously excited, the plunger 48 is returned to the projecting position again by the spring built in the trip coil 47 after demagnetization. When the trip operation is performed from the above-mentioned closed state, both ends of the pin 33 of the link mechanism 2 slide from the A position to the C position shown in FIGS. (Reset from trip open) To reset from the trip open state of FIGS. 5 and 6, perform as follows.

When the operation handle 12 is rotated in the opening direction (counterclockwise in FIG. 1) in the state shown in FIG. 6, the operation shaft 11 is rotated in the same direction, and the rotation lever 19 is integrally rotated accordingly. Move. By turning the turning lever 19,
Since the pressing roller 36 presses one side of the first restriction link 35 a, both restriction links 35 a and 35 b rotate around the rotation shaft 13 in the counterclockwise direction. And the first regulation link 35
By the counterclockwise rotation of “a”, the latch piece 62 presses the shaft 58 of the lock lever 54, and the twist coil spring 55
The lock lever 54 is rotated clockwise against the urging force of the lock lever 54.

By rotating the lock lever 54 in the clockwise direction, the retracting portion 53 of the protrusion 51 of the trip lever 49 is retracted.
The roller 61, which has been located at the position, goes over the lower portion of the retracting portion 53 and engages with the locking recess 52. Further, the hooking piece 62 of the first restriction link 35a is again engaged with the shaft 57 via the roller 59 (see FIGS. 3 and 4).

When the trip open state is restored to the normal open state as described above, both ends of the pin 33 of the link mechanism 2 are positioned from the C position shown in FIGS. 8 and 9 to the A position with respect to the left and right support plates 3 and 4. Slide up to.

As described above, in this embodiment, since both ends of the pin 33 are always in contact with the left and right support plates 3 and 4, the pin 33 does not come out. In this embodiment, the links 32, 3 have a simple structure as shown in FIG.
7 can be connected.

The present invention is not limited to the above-described embodiment, but in the above-described embodiment, the embodiment is a link mechanism that is manually driven, and the link mechanism of a switch that is opened and closed by a solenoid. The present invention can be embodied or embodied in a pin connecting structure that connects the lever and the link, and can be arbitrarily changed without departing from the spirit of the present invention.

[0043]

As described above in detail, according to the present invention, it is not necessary to form the split pin insertion hole in the pin for connecting the lever and the link, and the labor for inserting the split pin is not required. Since the pins need only be the length necessary for the connection, the space required for housing the link mechanism, particularly the width direction of the link mechanism, can be narrowed, and the switch can be easily downsized. It has an excellent effect.

[Brief description of drawings]

FIG. 1 is a front view of a link mechanism according to an embodiment of the present invention, showing most of the link mechanism in a closed state.

FIG. 2 is a front view showing a remaining portion of the link mechanism in a closed state.

FIG. 3 is a front view showing most of the link mechanism in an opened state.

FIG. 4 is a front view showing the remaining part of the link mechanism in the opened state.

FIG. 5 is a front view showing a majority of the link mechanism at the time of trip.

FIG. 6 is a front view showing the remaining portion of the link mechanism at the time of trip.

FIG. 7 is a side view of the link mechanism of the same.

FIG. 8 shows a right support plate, (a) is a front view and (b) is a side view.

9A and 9B show a left support plate, FIG. 9A is a front view, and FIG. 9B is a side view.

10 is a cross-sectional view taken along line XX of FIG.

11 is a cross-sectional view taken along line YY of FIG.

[Explanation of symbols]

1 ... Switch case, 2 ... Link mechanism, 3 ... Left support plate, 4
... right support plate, 12 ... operation handle, 13 ... fixed shaft, 14
... fixed shaft, 15 ... fixed shaft, 18 ... opening / closing shaft, 27 ... accumulating spring, 28 ... actuating lever, 31 ... connecting shaft, 32 ... connecting link, 33 ... pin, 35a, 35b ... first regulating link, 3
7 ... 2nd regulation link, 47 ... Trip coil, 49 ... Trip lever, 54 ... Lock lever, 62 ... Latching piece.

Claims (1)

[Claims] 1. A link mechanism of a switch, wherein a drive mechanism and an opening / closing portion are connected by a link mechanism to open / close the opening / closing portion, and the link mechanism is a switch link mechanism supported by a support plate. Pins are used to connect the levers and links that make up the links and links to the links. A link mechanism for switches, characterized by a support plate to prevent slipping.