JP2525923B2 - Reversible electromagnetic contactor - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a reversible electromagnetic contactor applied to switching between normal rotation and reverse rotation of a motor.

[Conventional technology]

Conventionally, as a structure for mounting the electromagnetic contactor on the mounting rail, there has been a structure as shown in FIGS. 7 to 9. That is, 12 is an electromagnetic contactor, which is made of an elastic thermoplastic resin. Width regulation ridges 60, 61 are formed on both side edges of the lower surface that is the mounting surface of the electromagnetic contactor 12, and the space between the width regulation ridges 60, 61 is equal to that of the hat-shaped cross-section mounting rail 6.
It is formed to have a width in which 2 fits. One side width regulation ridge 60
Two locking projections 63 are provided on the edge of the front end of the locking projection 63, and the locking projections 63 and the width regulating projections 60 form a fixed locking portion 64. The other width-regulating ridge 61 is notched at the center, and a hook-shaped hooking portion 65 is provided at the notch. The hook portion 65 is a plurality of hanging pieces 65c hanging on the bottom surface substantially parallel to the side surface of the electromagnetic contactor 12, and a connecting piece 65b for connecting the ends of the hanging pieces 65c.
And a hooking piece 65a formed between the hanging pieces 65c of the connecting piece 65b and hooked to the other piece 62b of the mounting rail 62, and an operation hole 66 formed in the connecting piece 65b, and the side surface is T-shaped as a whole. It was formed in. The operation hole 66 is formed in a slit shape into which the tip of the driver can be inserted. On the side wall of the electromagnetic contactor 12 on the side where the hook portion 65 is provided, a guide groove 67 having a tapered bottom surface is formed so as to correspond to the operation hole 66.
Because of this structure, the mounting rail 62
One piece 62a is locked to the locking piece 64, and the driver 68 is hooked to the hook portion 65.
Then, the hook portion 65 is bent to the outside by a driver 68. In this way, the gap between the locking piece 64 and the hook portion 65 is widened, and the other piece 62b of the mounting rail 62 is attached to the hook piece 6 of the hook portion 65.
By being housed in the 5a, the hook portion 65 is returned by its elasticity to lock the other piece 62b of the mounting rail 62. In this way, by bending the hook portion 65 using the driver 68, the attachment to the attachment rail 62 can be easily performed.

When the electromagnetic contactor 12 is used for the reversible electromagnetic contactor applied to switching between normal rotation and reverse rotation of the motor, as shown in FIG. 10, the movable parts 70 and 71 which are operated by the excitation operation face each other. Thus, the pair of electromagnetic contactors 12a and 12b are arranged. This is because an interlock mechanism is provided to prevent the contact of one electromagnetic contactor 12a from turning on when the contact of the other electromagnetic contactor 12a is on.
That is, 74 is an interlock member, and the movable portions 70, 71 engage with the recesses 74a, 74b provided at both ends thereof. Then, while one of the movable portions 70, 71 is in the operating state, the other operation of the movable portions 70, 71 can be blocked. 75 is a movable part 70 of the electromagnetic contactors 12a, 12b,
It is a protective cover that is installed straddling between 71 and that allows the interlock member 74 to slide.

[Problems to be Solved by the Invention]

When the electromagnetic contactors 12a and 12b are arranged so that the moving directions of the movable parts 70 and 71 face each other as described above, the hooking parts 65 and 65 are provided.
Is located on the opposite side. Therefore, the electromagnetic contactors 12a and 12b cannot be integrally mounted on the mounting rail 62, and even if the electromagnetic contactors 12a and 12b are separately mounted, the work is very troublesome and the mounting rail base 76 Needed.

Therefore, an object of the present invention is to provide a reversible electromagnetic contactor that includes an interlock mechanism and can be easily attached to a mounting rail.

[Means for solving the problem]

In the reversible electromagnetic contactor of the present invention, a hooking portion that engages with the mounting rail is provided on one side edge of the lower surface, and the movable portion is projected on the upper surface so that the movable portion operates in a straight line in the same direction by the exciting operation. A pair of electromagnetic contactors, a protective cover for covering the movable part of the electromagnetic contactor over the movable part, and the movable part so as to interlock with the operation of the movable part. A rotating plate provided with an engaged engaging part and a blocking part for blocking the operation of the other movable part in the operating state of the one movable part, and a position separated from a straight line connecting both the movable parts. The rotary plate is rotatably attached with the pivot shaft in FIG.

[Action]

According to the configuration of the present invention, even if the pair of electromagnetic contactors are arranged so that the movable portions move in the same direction, the movable plate allows the movable portion to move while the other movable portion operates. Can be stopped. For this reason, since the pair of hook portions can be arranged on one side edge, the attachment to the attachment rail becomes easy. Further, since the pivot shaft of the rotating plate is located away from the straight line connecting both movable parts, the rotating plate reliably rotates with respect to the operation of the movable part. In other words, there should be no pivot shaft in the direction of movement of the movable part, even if the rotary plates have rotated a certain amount from the predetermined position of the rotary plates when both of the pair of electromagnetic contactors are in the OFF state. As a result, since the rotation moment acts, the rotating plate can be surely rotated. Therefore, the interlock mechanism that determines whether the movable portion is turned on or off operates reliably regardless of the use condition.

〔Example〕

An embodiment of the present invention will be described with reference to FIGS. In other words, this reversible electromagnetic contactor has a mounting rail 62
A pair of upper and lower surfaces 2a, 2a protruding from the movable portions 4,5 on the upper surfaces 2a, 2a and arranged such that the directions in which the movable portions 4,5 move by the excitation operation are the same on a straight line. Electromagnetic contactors 6, 7 and the movable parts 4,5 of these electromagnetic contactors 6, 7
Protective cover 8 covering the movable parts 4 and 5 across
And a rotating plate 10 rotatably provided on the protective cover 8.
It has and.

The protective cover 8 includes a storage portion 8a for storing the rotating plate 10 and a lid 8b attached to the storage portion 8a by elastic engagement.
The storage portion 8a is provided with elongated holes 13 and 14 through which the movable portions 4 and 5 pass. Further, the rotary plate 10 is rotatably attached through its hole 30 with the pivot shaft 15 located at a position away from the straight line connecting the movable parts 4 and 5 as an axis. A plurality of claws 20 ... Are provided on the back surface of the storage portion 8a, and these claws 20 ... Engage with locking holes 21 ... Provided in the electromagnetic contactors 6, 7. The rotating plate 10 has engaging portions 25 and 26 that are intruded into both ends, and the movable portion 4 that passes through the elongated holes 13 and 14,
5 is located in these engaging portions 25 and 26. And
Engaging portions 25 and 26 are formed in an inclined shape with respect to the advancing direction of the movable portions 4 and 5 so that the rotating plate 10 rotates in the opposite direction in association with the operation of the movable portions 4 and 5. . Further, the blocking portions 17 and 18 are provided at the inner portions of the engaging portions 25 and 26, so that the operation of one movable portion 4 or 5 can prevent the operation of the other movable portion 4 or 5.

The movable parts 4 and 5 of the electromagnetic contactors 6 and 7 are on one side with the excitation operation.
It moves forward in the directions of 2, 2 and the surfaces 2a, 2a are perpendicular to the one side surface 2, 2. These electromagnetic contactors 6 and 7 are in contact with each other so that the side surfaces 2 and 2 are in the same direction.
The mounting structure is the same as that shown in FIGS. 7 to 9 although it is mounted on the mounting rail 62 by 5,65.
Regarding the internal structure of the electromagnetic contactors 6, 7, see
It is the same as that described in Japanese Unexamined Patent Publication No. 127324.

Next, the operation of this reversible electromagnetic contactor will be described. FIG. 4A shows a state in which both the pair of electromagnetic contactors 6 and 7 are off. Since the rotating plate 10 can move in either direction, both the movable parts 4 and 5 can move forward. If the electromagnetic contactor 6 is turned on in this state,
As shown in FIG. 2B, the movable portion 4 advances in the direction of arrow A, and the rotating plate 10 rotates about the pivot shaft 15. At this time, the blocking unit 18 enters the path of the movable unit 5 and blocks the advance of the movable unit 5. When the electromagnetic contactor 6 is turned off, the state shown in FIG. 4 (a) is restored. Further, when the electromagnetic contactor 7 is turned on from the state of FIG. 4 (a), the movable portion 5 advances in the direction of arrow B to pivot the rotating plate 10 as shown in FIG. 4 (c). Rotate in the opposite direction with the spindle 15 as the axis. At this time, the blocking unit 17 enters the path of the movable unit 4 to prevent the movable unit 4 from advancing. When the electromagnetic contactor 7 is turned off, the state shown in FIG. 4 (a) is restored.

FIG. 5 shows a case in which another rotating plate 10 'is attached to the protective cover 8. That is, the rotating plate 10 'is also rotatably attached to the pivot shaft 15 provided in the protective cover 8 through the hole 31, but the engaging portion 23 is provided only at one end and is projected at the other end. A section 24 is provided. The movable portion 4 passed through the elongated hole 13 is positioned inside the engaging portion 23, and the movable portion 5 passed through the elongated hole 14 is located inside the inner edge 27 of the protruding portion 24 from the tip of the protruding portion 24. Is also located outside (FIG. 6 (a)). The engaging portion 23 is formed in an inclined shape with respect to the advancing direction of the movable portion 4, so that the rotating plate 10 ′ rotates about the pivot shaft 15 in the operating state of the movable portion 4. is there. In addition, the side edge of the movable portion 4 on the advancing side in the entering portion 23 and the tip of the protrusion 24 become blocking portions 17 ', 18', and when one of the movable portions 4 and 5 is operating, the other movable portion 4 is operated. , 5 can be blocked.

Next, the operation of the reversible electromagnetic contactor using the rotating plate 10 'will be described. FIG. 6A shows a state in which both of the pair of electromagnetic contactors 6 and 7 are off. Since the rotating plate 10 'can move in either direction, both the movable parts 4 and 5 can move forward. In this state, the electromagnetic contactor 6
When the switch is turned on, as shown in FIG.
Moves in the direction of arrow A, and the rotating plate 10 'rotates in the C direction with the pivot shaft 15 as the axis. At this time, the blocking portion 18 'enters the path of the movable portion 5 to prevent the movable portion 5 from advancing. When the electromagnetic contactor 6 is turned off, the state shown in FIG. 6 (a) is restored.
Further, when the electromagnetic contactor 7 is turned on from the state of FIG. 6 (a), the movable portion 5 is moved to the arrow B as shown in FIG. 6 (c).
Advance in the direction of. At this time, the inner edge 27 and the movable portion 5 contact each other to prevent the rotating plate 10 'from rotating in the direction C, whereby the movable portion 4 contacts the blocking portion 17' and the movable portion 4 advances. Prevent. When the electromagnetic contactor 7 is turned off, the state shown in FIG. 6 (a) is restored.

As described above, according to these embodiments, the electromagnetic contactor 6
Is excited, interlocks the electromagnetic contactor 7,
When the electromagnetic contactor 7 is excited, the electromagnetic contactor 6 can be interlocked. Moreover, a pair of electromagnetic contactors 6,
Since the 7 are arranged in the same direction, the hook portions 65, 65 can be arranged at the side edges on the same side of the lower surface, so that the attachment to the attachment rail 62 can be easily performed. Further, since the pivot shaft 15 of the rotating plate 10 is located away from the straight line connecting the movable parts 4 and 5, the rotating plate 10 is surely rotated with respect to the operation of the movable parts 4 and 5. To do. That is, when both the pair of electromagnetic contactors 6 and 7 are in the off state, the rotating plates 9 and 10 shown in FIG.
Even if the rotating plates 9 and 10 are rotated from the predetermined position of
Since there is no pivot shaft 15 in the moving directions A and B of the movable parts 4 and 5,
Since the rotation moment acts, the rotating plate 10 can be surely rotated. Therefore, the interlock mechanism that determines whether the movable parts 4 and 5 are turned on or off reliably operates regardless of the use condition. The same effect can be obtained in the embodiment shown in FIG. Although the engaging portions 23, 25, 26 are formed in a recessed shape, they may be elongated holes.

〔The invention's effect〕

As described above, according to the reversible electromagnetic contactor of the present invention, the rotating plate can prevent the operation of one of the movable portions from the operation of the other movable portion. Moreover, since the pair of electromagnetic contactors are arranged so that the movable parts operate in the same direction, the pair of hooking parts can be arranged on one side edge, and the mounting on the mounting rail becomes easy. . Further, since the pivot shaft of the rotating plate is located away from the straight line connecting both movable parts, the rotating plate reliably rotates with respect to the operation of the movable part. In other words, there should be no pivot shaft in the direction of movement of the movable part, even if the rotary plates have rotated a certain amount from the predetermined position of the rotary plates when both of the pair of electromagnetic contactors are in the OFF state. As a result, since the rotation moment acts, the rotating plate can be surely rotated. Therefore, the interlock mechanism that determines whether the movable portion is turned on or off operates reliably regardless of the use condition.

Even if the same type of electromagnetic contactor is used, the positive and negative of the terminals do not reverse.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a protective cover and a rotating plate, FIG. 2 is a side view of the assembled state, and FIG. 3 is an exploded perspective view of a reversible electromagnetic contactor according to an embodiment of the present invention. Figure (a)
Is an explanatory view of the state of the rotating plate when both of the pair of electromagnetic contactors are off, and FIG. 4 (b) is an explanatory view of the state of the rotating plate when one of the electromagnetic contactors is on, and FIG. ) Is an explanatory view of the state of the rotating plate when the other electromagnetic contactor is on, FIG. 5 is an exploded perspective view of the protective cover and the rotating plate when another rotating plate is used, and FIG. FIG. 6A is a state explanatory view of the rotary plate when both the pair of electromagnetic contactors are off, and FIG. 6B is a state explanatory view of the rotary plate when one electromagnetic contactor is on. 6
FIG. 7 (c) is an explanatory view of the state of the rotating plate when the other electromagnetic contactor is on, FIG. 7 is a perspective view showing the relationship between the electromagnetic contactor and the mounting rail, and FIG. 8 is its hooking portion. FIG. 9 is an enlarged perspective view, FIG. 9 is a partially cutaway side view of the same, and FIG. 10 is an exploded perspective view of a conventional reversible electromagnetic contactor. 4, 5 ... Movable part, 6, 7 ... Electromagnetic contactor, 8 ... Protective cover, 10, 10 '... Rotating plate, 17, 18, 17', 18 '... Blocking part,
23,25,26 …… Engagement part, 62 …… Mounting rail, 65 …… Hooking part

Claims (1)

(57) [Claims] 1. A hooking portion which engages with a mounting rail is provided at one side edge of a lower surface, and a movable portion is projected on an upper surface so that the movable portion is actuated by an exciting operation in the same direction on a straight line. Pair of electromagnetic contactors, a protective cover that covers the movable portion of the electromagnetic contactors and covers the movable portion, and engagement that engages with the movable portion so as to interlock with the operation of the movable portion. And a pivoting plate provided with a blocking portion for blocking the operation of the other movable portion in the operating state of the one movable portion, and the pivot shaft located at a position apart from a straight line connecting the both movable portions. A reversible electromagnetic contactor, wherein the rotating plate is rotatably attached with the axis as a center.