JPH0345409Y2 - - Google Patents

Description

[Detailed description of the invention] [Technical field] The invention is used in conjunction with adjacent electromagnetic contactors so that when one contact is in the on state, the other contact is not driven on. The present invention relates to a connection structure of an electromagnetic contactor.

[Background Art] In this type of device in which two electromagnetic contactors 1, 1 are connected by an interlock body, the lower part of the electromagnetic contactors 1, 1 is connected as shown in FIG. The two electromagnetic contactors 1, 1 were connected by a terminal 61'. That is, two dovetail-shaped coupling grooves 62 are provided in the vertical direction on the side surface of the electromagnetic contactor 1 where the electromagnetic contactors 1, 1 face each other. The connector 61' is integrally formed with an insertion shaft 61a having a loofah-shaped cross section from both sides of the central piece 61b. Then, the insertion shaft 61a of the connector 61' was inserted from below into the facing coupling grooves 62, 62 to connect the electromagnetic contactors 1, 1. In this way, the electromagnetic contactors 1 and 1 installed in parallel are arranged as shown in FIG.
It is mounted and fixed on a DIN standard rail 42. However, in such a conventional example, the connector 61' is simply connected to the electromagnetic contactor 1,
Since it is only inserted into the coupling groove 62 of No. 1 from below, there is a problem that it may shift downward due to vibration or the like as shown by the dashed line in the figure. Further, even when the electromagnetic contactors 1, 1 are not attached to the rail 42 and the connector 61' is directly attached to the electromagnetic contactors 1, 1, there is a similar problem of downward displacement due to vibration or the like.

[Purpose of the invention] The present invention has been provided in view of the above points, and is designed to prevent the connector from shifting downward even when both electromagnetic contactors are connected by a connector and installed on a rail. The purpose of this invention is to provide a connection structure for electromagnetic contactors.

[Disclosure of the invention] (Example) An example of the invention will be described below with reference to the drawings. First, the electromagnetic contactor 1 and the interlock body 20 connected to the electromagnetic contactor 1 at the upper part to interlock both the electromagnetic contactors 1, 1 will be described. In FIGS. 6 to 10, each electromagnetic contactor 1, 1
The body unit 5 includes a coil frame 3 around which a coil 2 is wound, a fixed iron core 4, and a movable iron core 6.
and a cover unit 7 having a contact portion (not shown) therein. Cover unit 7
further includes a terminal block 9 which has a built-in contact part and has a plurality of pairs of terminals 8 exposed on the top surface, and a frame 10 which is detachably connected to the bottom surface of the terminal block 9,
A movable iron core 6 is housed within the frame 10,
A terminal block 9 is connected to the body unit 5 via a frame 10. A movable body 12 having a pair of first hooks 11 protruding from its upper surface is housed in the frame 10 so as to be movable up and down, and a movable iron core 6 is attached to the lower end of the movable body 12. The first hook 11 is removably engaged with a contact driver 15 which is vertically movable within the terminal block 9. This frame 10 is connected to the upper end of the body unit 5, the movable body 12 is biased upward by a spring 14, and the movable core 6 is attracted toward the fixed core 4 when the coil 2 is energized.
The movable body 12 is pulled downward against the spring force of the spring 14, and the contact driver 15 that engages with the first hook 11 is moved downward to open and close the contacts in the terminal block 9. A second hook 16 that interlocks with the contact driver 15 is provided on the upper surface of the terminal block 9.
stands out. The terminal block 9 and frame 10 that constitute the cover unit 7 are connected to the first hook 11 described above.
The cover unit 7 and the body unit 5 are connected by screws 19 that pass through the body unit 5 from mounting pieces 18 provided at both ends of the frame 10. Further, a mounting hole 13 for mounting to the housing is formed in the lower part of the body unit 5, and a coil terminal 17 is formed in the upper part.

Connect the adjacent magnetic contactors 1, 1 to the above second hook 1.
By coupling using 6, both electromagnetic contactors 1, 1 are interlocked, and when the contact part of one electromagnetic contactor 1 is in the on state, the other electromagnetic contactor 1
An interlock body 20 that prevents the contact portion of the electromagnetic contactors 1, 1 from being driven to the on side is attached so as to straddle the upper surface of both the electromagnetic contactors 1, 1.
mechanically connect. This interlock body 20
is constructed as shown in FIG. 7, with storage recesses 2 on both sides inside a box-shaped container 21 made of an insulating material.
A pair of sliders 22A with a symmetrical shape to 6 and 27,
22B is housed so as to be movable in the vertical direction.
Engagement recesses 23 that are coupled to the second hooks 16 are cut in the lower portions of the sliders 22A and 22B, respectively. The cylindrical roller 24 has an insertion hole 24 therein.
A coiled spring 25 is inserted into the inside of the container 21, and both ends of the spring 25 are fixed and supported by being attached to the lower portions of cutouts 28 and 29 formed in the side wall of the container body 21. Therefore, the roller 24 is located at the midpoint between the sliders 22A and 22B, as shown in FIG. 6b. A slider 22A is mounted on the lower surface of the cover 34 which is placed over the upper opening of the vessel body 21.
The top end of the slider 22B comes into contact with the slider 22B.
The upward movement of A and 22B is restricted. Further, as shown in FIG. 6a, on one side of the container body 21, a substantially T-shaped engagement recess 23 formed at the lower end of the sliders 22A, 22B and a second hook 16 are engaged. An opening 36 is provided for this purpose. A fixing portion 37 is integrally formed to protrude from one end of the side surface of the vessel body 21 opposite to the opening portion 36 . A substantially L-shaped fixing piece 30 is vertically provided on the outside of the fixing portion 37, and its tip portion protruding toward the vessel body 21 serves as an engaging protrusion 31. As shown in FIG. 8a, an engagement groove 38 that engages with this engagement protrusion 31 is formed by opening the vertical surface of the terminal block 9 of the electromagnetic contactor 1 at the side. Furthermore, a lock piece 32 is integrally formed at the end opposite to the fixing part 37. This lock piece 32 has elasticity,
An engagement step 33 is formed on the lower surface of the fixing piece 30 so as to face the engagement protrusion 31 . As shown in FIG. 8B, this engagement step portion 33 is elastically engaged with the wall surface of a recess 39 formed on the upper surface of the electromagnetic contactor 1 and the fixed piece 30 side. By the way, fixed piece 3
0. The lock piece 32 is molded integrally with the container body 21, and for this purpose, the fixing part 37 is provided with an opening window 40 that passes through it vertically, and the lock piece 32,
The fixing piece 30 can be molded with an upper and lower mold, simplifying the structure.

As can be seen from the shape of the second hook 16 shown in FIG. 10, the interlock body 20 is coupled to the second hook 16 by sliding in a direction perpendicular to the direction in which the electromagnetic contactors 1 are lined up. Both electromagnetic contactors 1 are connected between their upper ends. That is, the second hook 16 is inserted into the opening 2 of the interlock body 20.
At the same time, slide the fixing piece 30 of the interlock body 20 in the direction of the arrow shown in FIG.
The coupling protrusion 31 of the electromagnetic contactor 1 is inserted into the engagement groove 3
8, and the engagement stepped portion 33 of the lock piece 32.
is attached to the wall surface of the recess 39 of the other electromagnetic contactor 1 in the direction of the arrow in the figure and elastically engaged. Therefore, by engaging the fixing piece 30 and further engaging the locking piece 32, both electromagnetic contactors 1 can be connected with one touch. When the electromagnetic contactor 1 is turned on, the sliders 22A and 22B are connected to the opening 20a.
allows for downward movement.

By the way, the contact portion of each electromagnetic contactor 1 is turned on when the contact driver 15 is sucked and driven downward together with the movable iron core 6 through the first hook 11, and the adjacent electromagnetic contactor When one of the electromagnetic contactors 1 is turned on and the slider 22A on the electromagnetic contactor 1 side is lowered, the ceiling surface becomes a concave curved surface as shown by the arrow in Fig. 6b. The roller 24 is moved to the left by the concave stepped portion 35A serving as a regulating means, and the other slider 2
2B, in other words, the roller 24 fits into the recessed step 35B, so the slider 2
Prevents the downward movement of 2B. Contrary to the above, when the slider 22B is lowered downward, the recessed step 35
The roller 24 is pushed by the concave curved surface B and moves to the right in the figure, and the concave stepped portion 35A of the slider 22A
A roller 24 is fitted into the slider 22A to prevent the slider 22A from moving downward. In this way, the sliders 22A and 22B on the side of the electromagnetic contactor 1 that is not turned on and the contact driver 1 that is interlocked with the sliders 22A and 22B
5. The movable body 12 and the movable iron core 6 are prevented from moving downward, so that when one electromagnetic contactor 1 is in the on state, the other electromagnetic contactor 1 is not turned on. Adjacent electromagnetic contactors 1 are connected by an interlock body 20. The above lock can be achieved by turning off the magnetic contactor 1 that is in the on state, that is, by turning off the magnetic contactor 1 that is in the on state, that is, the sliders 22A, 22
It is automatically released by returning B to the upper position. In other words, the spring 2 inserted into the roller 24
5 is located at the midpoint between both sliders 22A and 22B, and both ends of the spring 25 are supported and fixed.
The return force of the spring 25 causes the roller 24 to return to the midpoint position between the sliders 22A and 22B. In addition, the recessed step portions 3 of the sliders 22A and 22B
Since the surfaces of 5A and 35B that come into contact with the roller 24 are concave curved surfaces, the slider 22A or 22
When B moves downward, it is easy to push the roller 24, and when the roller 24 returns, it returns quickly without being caught by the slider 22A or 22B.

Next, the DIN standard rail 24 to which the electromagnetic contactor 1 is attached and the structure for attaching it to the rail 42 will be described. As shown in Figure 11,
Projections 53 are formed in parallel on both sides of the lower surface of the body unit 5 of the electromagnetic contactor 1. One of the protrusions 53 has a rail 42 formed in a substantially U-shaped cross section.
A holding protrusion 5 that engages and holds one of the locking pieces 42a of the
4 is formed. A groove 43 is cut in the width direction of the other protrusion 53, and when explained upside down in FIG. 12 for convenience, this groove 43 is open on the upper surface and both sides. In addition, body unit 5
A flat guide piece 44 is integrally formed to protrude from the upper part of the inner wall surface of the groove 43 from the inside. A space is provided between the guide piece 44 and the bottom surface of the groove 43. A positioning step 56 for positioning is integrally formed inside this space.
This positioning step 56 closes off the inside of the space. Furthermore, a raised step 55 is formed on the outside of the guide pieces 44 on both sides of the bottom surface of the groove 43, and a protrusion 59 protruding toward the upper surface of the step 55 is integrally formed with the protrusion 53. A recess 45 is formed inside the body unit 5 of each protrusion 59 .

The slider operating piece 49 moves in the groove direction (inside and outside direction of the body unit 5) within the groove 43 of the body unit 5.
A holding protrusion 47 is formed on the lower surface of the tip of the slider operating piece 49 to engage and hold the other locking piece 42b of the rail 42. Further, an operating portion 48 having an opening 57 is formed at the base end of the slider operating piece 49, and is operated by inserting a finger or the tip of a screwdriver into the opening 57 of the operating portion 48.
Further, a flat slide piece 50 is formed integrally with the side surface of the slider operation piece 49 and protrudes laterally from the side surface of the slider operation piece 49 so as to be continuous with the operation part 48 . This slide piece 50 is located between the guide piece 44 and the bottom surface of the groove 43. The tip of the slide piece 50 is the guide piece 44
In order to prevent the slider operation piece 49 from entering the inside of the body unit 5 more than necessary, the positioning step 56 is restricted. The holding protrusion 47 of the slider operation piece 49 projects inward from the protrusion 53 to engage with the locking piece 42b of the rail 42. The substantially central portion of the slider operation piece 49 is a protruding spring support portion 58, and the holding protrusion 47 is formed on the tip side of the spring support portion 58 as described above. A protrusion 46 having a substantially semicircular cross section is formed to protrude outward in the vertical direction at the center of a side surface 58a on the opposite side from the holding protrusion 47 of the spring support part 58, and a retaining piece is provided on both sides of the protrusion 46. 5
1 and 51 are integrally provided to protrude outward. When the slider operation piece 49 is inserted into the groove 43 and the slide piece 50 hits the positioning step 56 and the positioning is regulated, the protruding surface of the protrusion 46 is lowered from the outer inner wall surface of the body unit 5 in the recess 5. It is set to be located on the outside. In addition, the protrusion 46
The upper surface is formed lower than the upper surface of the protrusion 53,
A wire spring 52 can be placed thereon as will be described later. Furthermore, the upper surface of the protrusion 46 is formed with an inclined surface that descends in a direction opposite to the insertion direction of the slider operation piece 49. Spring support portions 5 on both sides of the protrusion 46
The retaining piece 51 formed on the side surface 58a of 8
Similarly, an inclined surface is formed on the upper surface. The elastic wire spring 52 has substantially the same length as the width direction of the groove 43, that is, the length between the two recesses 45, 45. Here, when the slide piece 50 of the slider operation piece 49 is in contact with the positioning step 56, the recesses 45, 45 of the body unit 5 and the protrusion 46 of the slider operation piece 49 are substantially straight in the width direction of the groove 43. It will be located in the shape of

Next, slider operation piece 4 is attached to body unit 5.
9 will be explained below. First, the first
As shown in FIG. 4a, the slider operation piece 49 is fitted into the groove 43 of the body unit 5, and is inserted by sliding it from the outside while guiding the slide piece 50 with the guide piece 44. Then, with the slide piece 50 of the slider operation piece 49 in contact with the positioning step 56, the wire spring 52 is placed on the upper surface of the protrusion 46 of the slider operation piece 49. At this time,
Both ends of the wire spring 52 are located in both the recesses 45, 45, and are in a state as shown in FIG. 14a, and the wire spring 52
is designed not to protrude from the upper surface of the spring support portion 58. Next, when a force is applied to the center of the wire spring 52 in the direction of the arrow shown in FIG.
The wire spring 52 bends and slides on the protrusion 46 and the retaining piece 51, as shown in FIG. 14c.
It is locked to the side surface of the protrusion 46 via the retaining piece 51. At this time, two retaining pieces 5 are placed above the wire spring 52 with the protrusion 46 in between.
1 is located, and this retaining piece 51,
51 prevents the wire spring 52 from coming off.
This wire spring 52 constantly biases the slider operation piece 49 in the insertion direction. Further, the force applied to the wire spring 52 of the slider operating piece 49 during assembly is always constant and can be made sufficiently smaller than the allowable stress, so that the holding force when the rail is attached is stable.

FIG. 15 shows a cross-sectional view of the electromagnetic contactor 1 attached to the rail 42, in which the slider operation piece 49 is pulled outward against the spring force of the wire spring 52, and the other holding protrusion 54 and the rail are pulled together. When the slider operation piece 49 is released, the holding protrusion 47 returns to its original state by the spring force of the wire spring 52, and the holding protrusion 47 engages with the other locking piece 42a of the rail 42.
2b, and the electromagnetic contactor 1 is mounted on the rail 42.

Next, the connector 61, which is the gist of the present invention, will be explained. That is, in FIG. 4, the coupling groove 62 of the electromagnetic contactor 1 is formed in the same manner as the conventional one, and fall prevention pieces 63 are formed integrally with the center of the insertion shaft 61a at the lower part of the connector 61. This fall prevention piece 63 has elasticity and is bent into a substantially V-shape. The length dimension of both fall prevention pieces 63 is rail 4
As shown in FIG.
When inserted across the coupling grooves 62, 62, the lower end of the tip of the fall prevention piece 63 comes into contact with the locking pieces 42a, 42b of the rail 42, and the connector 61 does not come off downward. . In addition, since the elastic drop prevention piece 63 is bent into a square shape, when the electromagnetic contactors 1, 1 are installed side by side, the contact parts of both electromagnetic contactors 1, 1 come into elastic contact, preventing vibrations, etc. This allows the electromagnetic contactors 1, 1 to be reliably attached to the rail 42 by absorbing the damage.

Figure 1 shows a claw piece 6 at the top of the tip of the fall prevention piece 63.
In this case, as shown in FIG. 2, the electromagnetic contactor 1 is not attached to the rail 42 but is directly attached, and the claw pieces 6
3a is locked onto the mounting base 64 of the electromagnetic contactor 1 to prevent the connector 61 from falling. Moreover, even when installing on the rail 42, of course the claw piece 63a
is fixed on the mounting base 64 and will not fall. FIG. 3 shows the state in which the connector 61 is attached, and since the drop prevention piece 63 has elasticity, the coupling groove 62 of the insertion shaft 61a of the connector 61
When inserting the claw piece 63a, the claw piece 63a is locked onto the mounting base 64 by pushing it in while contacting the side surface of the mounting base 64.

[Effects of the invention] As described above, in the present invention, a drop prevention piece that is longer than at least the groove width of the rail to which the electromagnetic contactor is attached is formed on the connector that connects the electromagnetic contactor. This has the advantage that since the fall prevention pieces come into contact with both ends of the rail, the connector does not fall downward as in the prior art, thereby preventing the connector from coming off.

[Brief explanation of drawings]

Fig. 1 is a perspective view of a connector provided with a claw piece according to an embodiment of the present invention, Fig. 2 is a perspective view of the main part showing the same as above in the attached state, and Fig. 3 is a bottom view of the main part showing the same as the above in the attached state. Figure 4 is a perspective view of the above connector without a claw piece, Figure 5 is a cross-sectional view showing the above installation state, and Figure 6a is an interface of an electromagnetic contactor in which the above connector is used. FIG. 6b is a sectional view of the interlocking body, FIG. 6c is a perspective view of the roller, and FIG. 7 is an exploded perspective view of the interlocking body. Figures 8a and b are explanatory views of the same as above, Figure 9 is a perspective view of the same as above,
Fig. 10 is a sectional view showing the connected state of the same as above;
The figure is a bottom view of the electromagnetic contactor with the slider operation piece attached for attaching the electromagnetic contactor to the rail, Figure 12 is a perspective view of the main parts of the same, and Figure 13 is
Figures a and b are a plan view and a side view of the same slider,
Figures 14a, b, and c are views showing the assembled state of the above embodiment, Figure 15 is a sectional view showing the state in which the above electromagnetic contactor is attached to a rail, and Figure 16 is a diagram of the conventional connector. The perspective view and FIG. 17 are sectional views of essential parts showing the attached state of the same. 1 is an electromagnetic contactor, 20 is an interlock body, 4
2 is a rail, 61 is a connector, 62 is a coupling groove, 63
indicates a fall prevention piece.

Claims (1)

[Scope of utility model registration request] The upper ends of the adjacent magnetic contactors are connected together, and the adjacent magnetic contactors are connected to each other so as to prevent the contact of the other magnetic contactor from being driven to the on side when the contact of one magnetic contactor is turned on. An interlock body that interlocks the matching electromagnetic contactors, a rail on which both electromagnetic contactors are placed and installed in the width direction, and an interlock body that interlocks the matching electromagnetic contactors, and a rail that is mounted on both sides of the electromagnetic contactor on the side where both electromagnetic contactors face each other. In the electromagnetic contactor connection structure, the electromagnetic contactor has a connector that is inserted into the formed coupling groove from the lower surface side of the electromagnetic contactor between the coupling grooves and connects both the electromagnetic contactors. A connecting structure for an electromagnetic contactor, characterized by forming a fall prevention piece that is longer than the width of the groove.