JP2525922B2 - 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 on the other piece 62b of the mounting rail 62, and an operation hole 66 formed in the connecting piece 65b, and the side shape 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 that covers these movable parts across a pair of movable parts of these electromagnetic contactors, a hole is provided in one piece, and a blocking part is provided in the other piece. A pair of substantially L-shaped rotating plates provided, and the pair of rotating plates are protected with the pair of pivot shafts located away from the straight line connecting the pair of movable parts as an axis. The pair of movable parts are rotatably attached to the cover, the pair of movable parts are inserted into the holes of the pair of rotatable plates, respectively, and the blocking part of the one rotatable plate that rotates in the operating state of the one movable part is the other. It is characterized in that the operation of the movable part is blocked.

[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 rotating plate causes the movable portion of the other movable portion to move in the operating state. The movement can be blocked. 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 the pair of movable parts and the movable part is inserted into the hole of the rotating plate, the rotating plate is not moved with respect to the operation of the movable part. Be sure to rotate. That is, even if the rotating plate is rotated a certain amount from the predetermined position of the rotating plate when both of the pair of electromagnetic contactors are in the off state, the connection between the movable portion and the hole and the operation direction of the movable portion Since the rotation moment acts due to the absence of the pivot shaft in the, 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 and 7 and a pair of movable parts 4 of these electromagnetic contactors 6 and 7,
Protective cover 8 covering these movable parts 4 and 5 across 5, and a pair of substantially L-shaped rotating plates 9 having holes 31 and 33 in one piece and blocking parts 17 and 18 in the other piece. , 10 and.

The protective cover 8 includes a storage portion 8a for storing the rotating plates 9 and 10,
It comprises 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. In addition, a pair of rotating plates 9 and 10 are rotatably attached to the protective cover 8 about a pair of pivot shafts 15 and 16 which are located away from the straight line connecting the pair of movable portions 4 and 5. There is. A plurality of claws 20 ... Are provided on the back surface of the storage portion 8a.
Engage with locking holes 21 provided in the electromagnetic contactors 6, 7. The rotating plate 9 is formed in a substantially L shape, and the other piece is extended in the direction of the pivot shaft 16 and the tip is cut out to form a blocking portion 17 that can prevent the movable portion 5 from advancing. The movable portion 4 provided with 31 and passed through the elongated hole 13 is passed through this hole 31 to connect the movable portion 4 and the rotating plate 9. The rotating plate 10 is also formed in a substantially L-shape, and another piece is extended in the direction of the pivot shaft 15 and the tip thereof is bent to form a blocking portion 18 that can prevent the movable portion 4 from advancing. The movable portion 5 provided with the hole 33 and passed through the elongated hole 14 is passed through the hole 33 to connect the movable portion 5 and the rotating plate 10. Further, holes 30 and 32 are provided near the corners of the rotating plate 9 and at the tip of one piece of the rotating plate 10, respectively, and these holes 30 and 32 are pivotally attached to the pivot shafts 15 and 16, respectively. There is.

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 plates 9 and 10 are both movable, the movable parts 4 and 5 can both move forward.
When the electromagnetic contactor 6 is turned on in this state, as shown in FIG. 4 (b), the movable portion 4 advances in the direction of arrow A and the rotating plate 9 makes the pivot shaft 15 the axis. Rotate. At this time, the blocking unit 17 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). The support shaft 16 is rotated about its axis. At this time, the blocking unit 18 enters the path of the movable unit 4 and blocks the advance of the movable unit 4.
When the electromagnetic contactor 7 is turned off, the state shown in FIG. 4 (a) is restored.

FIG. 5 shows a case where the protective cover 8 is provided with other rotating plates 9'and 10 '. That is, the rotary plates 9'and 10 'are formed in the same substantially L-shape with holes 34 and 36 provided in one piece and blocking portions 25 and 26 provided in the other piece. In the rotating plate 9 ', another piece is extended in the direction of the pivot shaft 16 to form a blocking portion 25, a hole 34 is provided at the tip of one piece, and the movable portion 4 passed through the long hole 13 is inserted in this hole 34. It is connected. In the rotating plate 10 ', another piece is extended in the direction of the pivot shaft 15 to form a blocking portion 26, a hole 36 is provided in the vicinity of a corner portion, and the movable portion 5 passing through the elongated hole 14 is formed in the hole 35. Connected to. Also, in the vicinity of the corners of the rotating plate 9'and in the rotating plate.
Holes 35 and 37 are provided at the tip of one piece of 10 ',
These holes 35 and 37 are pivotally attached to the pivots 15 and 16.

Next, the operation of the reversible electromagnetic contactor using the rotary plates 9'and 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 plates 9'and 10 'are both in a movable state, the movable parts
Both 4 and 5 can move forward. When the electromagnetic contactor 6 is turned on in this state, as shown in FIG. 6 (b), the movable portion 4 advances in the direction of the arrow A and the rotary plate 9'is rotated by the pivot shaft 15 '.
Rotate about. At this time, the blocking portion 25 causes the rotating plate 1
It abuts on 0'and prevents rotation of the rotating plate 10 'and prevents the movable part 5 from advancing. When the electromagnetic contactor 6 is turned off, the state shown in FIG. 6 (a) is restored. When the electromagnetic contactor 7 is turned on from the state shown in FIG. 6 (a), the movable portion 5 advances in the direction of arrow B as shown in FIG. 6 (c). At this time, the blocking portion 26 comes into contact with the rotary plate 9'to block the rotation of the rotary plate 9'and prevent the movable portion 4 from advancing. 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, in the embodiment shown in FIG. 1, the pivot shafts 15 and 16 of the rotating plates 9 and 10 have a pair of movable parts.
It is located away from the straight line connecting 4,5, and the movable parts 4,5
Since the holes are inserted into the holes 31 and 33 of the rotating plates 9 and 10, the rotating plates 9 and 10 reliably rotate with respect to the operation of the movable portions 4 and 5. That is, when the pair of electromagnetic contactors 6 and 7 are both in the OFF state, the rotating plates 9 and 10 shown in FIG.
Even if 9,10 rotate a little, it rotates due to the connection of the movable parts 4,5 and the holes 31,33 and the absence of the pivot shafts 15,16 in the moving directions A, B of the movable parts 4,5. Since the moment acts, the rotating plates 9 and 10 can be surely rotated. Therefore, the movable parts 4,5
The interlock mechanism that decides whether to turn on or off operates reliably regardless of the usage condition. The same effect can be obtained in the embodiment shown in FIG.

〔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 the pair of movable parts and the movable part is inserted into the hole of the rotating plate, the rotating plate is not moved with respect to the operation of the movable part. Be sure to rotate. That is,
From the predetermined position of the rotating plate when the pair of electromagnetic contactors are both off,
Since the rotation moment acts due to the connection of the movable portion and the hole and the absence of the pivot in the moving direction of the movable portion, 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, 9,10,9 ', 10' ... Rotating plate, 17,18,25,26 ... Blocking 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. A pair of electromagnetic contactors, a protective cover that covers the movable parts of the electromagnetic contactors and covers the movable parts, and a substantially L-shaped hole provided in one piece and a blocking part in the other piece. A pair of letter-shaped turning plates, and the pair of turning plates can be turned around the protective cover about a pair of pivot shafts that are located apart from a straight line connecting the pair of movable parts. Attached to each of the movable parts, the pair of movable parts are respectively inserted into the holes of the pair of rotating plates, and the blocking part of one rotating plate rotates in the operating state of the one movable part to operate the other movable part. A reversible electromagnetic contactor characterized in that it is designed to prevent