JPH0358128B2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field] The present invention relates to a connection structure of electromagnetic switches, and more specifically, when a plurality of electromagnetic switches are arranged in a line and one contact of adjacent electromagnetic switches is in the ON state, the other contacts. This relates to a connection structure for electromagnetic switches that are used in conjunction to prevent the contacts from turning ON.

[Background technology] Generally, a plurality of electromagnetic switches are arranged side by side, and adjacent electromagnetic switches are interlocked so that the contacts of one switch are
When interlocking so that the contacts of the other switch are not turned on when the switch is in the ON state, an interlock means is used to mechanically connect the movable members that drive the contacts in each electromagnetic switch. is used. However, this interlock means, which connects both electromagnetic switches together at the same time as the connection with the movable member, is difficult to connect between the upper ends of adjacent electromagnetic switches due to the connection position with the movable member. Since the electromagnetic switch is installed in a straddling manner, the bonding force between the lower ends of both electromagnetic switches becomes weak.
When used simply side by side on a rail such as a DIN rail, if an external force that attempts to separate the electromagnetic switches is applied to the lower end of the electromagnetic switch, this force will directly connect the upper ends of both electromagnetic switches. There is a problem in that the connection part of the interlock means is affected, causing trouble in the interlocking operation of the interlock means, or worse, damaging the connection part itself of the interlock means.

[Object of the invention] The present invention has been made in view of the above points,
The purpose is to provide a connection structure for electromagnetic switches that can easily and reliably connect electromagnetic switches that are used in conjunction with each other using an interlock means, and that can guarantee stable interlocking operation. be.

[Disclosure of the Invention] In the electromagnetic switch connection structure according to the present invention, a plurality of electromagnetic switches are arranged side by side with their side end faces facing each other, and when the contact of one electromagnetic switch is turned on, the other electromagnetic switch is closed or closed. The upper ends of adjacent electromagnetic switches are connected by an interlock means that interlocks the adjacent electromagnetic switches so as to prevent the contacts of the switch from being driven to the ON side, and the lower ends of each electromagnetic switch are A structure is disclosed in which a connecting groove with one end open is formed, and both ends of the locking piece are press-fitted into the connecting grooves of the adjacent electromagnetic switches, so that both the electromagnetic switches are connected at their lower ends. .

The present invention will be described in detail below based on embodiments shown in the figures. Each electromagnetic switch 1 is shown in Figs. 1, 2, and 4.
As shown in the figure, a body unit 5 includes a coil frame 3 around which a coil 2 is wound and a fixed iron core 4.
It is constructed by combining a cover unit 7 with a movable iron core 6 and a contact portion (not shown) inside. The cover unit 7 further comprises a terminal block 9 which has a built-in contact section and a plurality of pairs of terminals 8 exposed on the top surface, and a frame 10 that is removably connected to the bottom surface of the terminal block 9. A movable iron core 6 is housed therein, and a terminal block 9 is connected to the body unit 5 via a frame 10. A movable body 1 having a pair of first hooks 11 protruding from the upper surface of the frame 10.
2 is housed in a vertically movable manner, and a movable iron core 6 is attached to the lower end of the movable body 12, and the first hook 11 is detachably attached to a vertically movable contact driver 15 provided in the terminal block 9. join to. This frame 1
0 is connected to the upper end of the body unit 5 and is biased upward by a spring 14, and when the coil 2 is excited, the movable iron core 6 is attracted toward the fixed iron core 4, so that the spring force of the spring 14 is applied. The movable body 12 is pulled downward against this, and the contact driver 15 coupled to the first hook 11 is moved downward to open and close the contacts in the terminal block 9.
A second hook 16 protrudes from the upper surface of the terminal block 9 and is interlocked with the contact driver 15 . The terminal block 9 and the frame 10 constituting the cover unit 7 are connected using the snap rings 17 arranged at both ends of the frame 10 in addition to the engagement by the first hook 11, and the cover unit 7 and the body unit 5 are connected together. Attachment pieces 1 provided at both ends of the frame 10
8 to the body unit 5 by screws 19.

In the figure, reference numeral 20 indicates a device in which the adjacent electromagnetic switches 1 are coupled using the second hook 16 to interlock both electromagnetic switches 1, and the contact portion of one of the electromagnetic switches 1 is in the ON state. This interlock means prevents the contact part of the other electromagnetic switch 1 from being driven to the ON side when the other electromagnetic switch 1 is turned on. to connect. This interlock means 20
2, a pair of tappet rods 21 whose lower ends are connected to the second hook 16;
It is composed of a cam 22 disposed between both tappet rods 21, a stopper 23 disposed at a fixed position below the cam 22, and a case 24 surrounding these members. Each tappet rod 21 is driven up and down together with the contact driver 15 which drives the opening and closing of the tappet rods. The cam 22 is the horizontal shaft 2
The tip of an arm 27 is pivoted so as to be rotatable left and right around the horizontal shaft 25, is biased upward by a spring 26 disposed between the horizontal shaft 25, and extends left and right at the upper end. are each tappet rod 21
The stopper 23 is pressed against the lower surface of the protrusion 28 that projects inward from the upper end, and the pointed end of the lower end is opposed to the top of the upper end of the stopper 23 . By the way, each electromagnetic switch 1 is configured so that when the contact driver 15 is sucked downward together with the movable iron core 6 and driven downward, the contact part is turned ON, and the adjacent electromagnetic switch When one of the electromagnetic switches 1 is turned on, the tappet rod 2 on the electromagnetic switch 1 side
1 simultaneously moves downward via the second hook 16 to rotationally displace the cam 22 in one direction around the horizontal shaft 25 and to displace the entire cam 22 downward against the spring force of the spring 26. As a result, the lower end of the cam 22 advances diagonally downward along the slope 29 of the stopper 23, and the side edge of the lower end of the cam 22 abuts against the slope 29 of the stopper 23, causing the cam 22 to move downward.
is locked in this position. Therefore, even if you try to turn on the other electromagnetic switch 1 in this state,
Since the cam 22 is locked to the slope 29 of the stopper 23 and prevented from rotating in the opposite direction, the tappet rod 21 on the side of the electromagnetic switch 1, the contact driver 15 interlocked therewith, and the movable body 12 By preventing the movable iron core 6 from moving downward, when one electromagnetic switch 1 is in the ON state, the adjacent electromagnetic switch 1 is prevented from being driven ON. The devices 1 are connected by interlock means 20. The above lock is automatically released by turning off the electromagnetic switch 1 that is in the ON state, that is, by returning the tappet rod 21 upward. Incidentally, the above-mentioned interlock means 20
As can be seen from the shape of the second hook 16 shown in the figure, it is coupled to the second hook 16 by sliding in a direction perpendicular to the direction in which the electromagnetic switches 1 are lined up, and both electromagnetic switches 1 are attached to the upper end. Connect between.

By the way, as mentioned above, interlock means 2
When using electromagnetic switches 1 in conjunction with each other using DIN 0, as shown in Figures 1 and 2,
Generally, the electromagnetic switches 1 are arranged side by side on the rail 30, and for this reason, the lower surface of each electromagnetic switch 1 has a rail receiving groove 31 running in the left and right direction.
is formed, and the DIN is inserted into the rail receiving groove 31.
By fitting the rail 30, each electromagnetic switch 1
is attached so as to straddle this rail 30, and the electromagnetic switch 1 can be freely moved to an appropriate position along the rail 30.

As shown in FIG. 3, on both left and right sides of the bottom surface of each electromagnetic switch 1, connection grooves 35 each having one end open to the side surface are provided in a portion corresponding to the bottom surface of the rail receiving groove 31. The locking protrusions 38 protruding from the front and rear edges of both ends of the locking piece 36 are inserted into the recesses 37 formed at the front and rear edges of the connecting groove 35, respectively, so that the locking piece 36 locks into the connecting groove 35. By press-fitting, adjacent electromagnetic switches 1 are connected at their lower ends. The locking piece 36 is provided with two locking protrusions 38 which are lined up at a constant interval in the left-right direction on both front and rear edges of both side ends, and correspondingly, each connecting groove 3
5 has two recesses 37 formed at the same interval on both front and rear edges, and a locking protrusion 38 and a recess 37.
By changing the insertion position of the locking piece 36, the distance between adjacent electromagnetic switches 1 that are connected can be adjusted in stages as necessary. It is possible to adjust the distance in three steps from the minimum distance, where the sides of the two sides are in close contact, to the maximum distance. That is, in this type of electromagnetic switch 1, the sizes of the terminals and contacts differ depending on the current capacity used, and as a result, as shown in FIG. 4, the same body unit 5 and frame 10 are used. Various types of terminal blocks 9A and 9B having different sizes in the front, rear, left and right dimensions are selectively used, while those with fixed dimensions are used as the interlock means 20, so the size of the terminal block 9 used This causes a difference in the gap between the lower end portions of adjacent electromagnetic switches 1, and the above-mentioned locking piece 36 adjusts the gap in accordance with the size of the gap. For example, as shown in FIG. 2, an electromagnetic switch 1 equipped with a terminal block 9 for small capacity
When the terminal block 9 and the body unit 5 are connected to each other by the interlock means 20, both the terminal block 9 and the body unit 5 are arranged side by side with their sides in close contact with each other, so as shown in FIG. 38 can be fitted into the recess 37 of the connecting groove 35 to minimize the gap between both electromagnetic switches 1, and as shown in Fig. If the terminal block 9B is used for the other electromagnetic switch 1, and the terminal block 9A for small capacity is used for the electromagnetic switch 1, the terminal blocks 9A and 9B will come into close contact with each other on the side surfaces, creating a gap between the sides of the body unit 5. As shown in Figure 6,
The locking protrusion 37 of the locking piece 36 and the recess 3 of the connecting groove 35
By shifting the fitting position of the electromagnetic switch 1 by one position, the gap between the lower surface parts of the electromagnetic switch 1 is maintained at a predetermined distance.

[Effects of the Invention] As described above, the present invention interlocks adjacent electromagnetic switches so that when the contact of one electromagnetic switch is turned ON, the contact of the other electromagnetic switch is prevented from being driven to the ON side. The upper ends of adjacent electromagnetic switches are connected by an interlock means, and a connecting groove with one end open on the side is formed on the lower surface of each electromagnetic switch, and both ends of the locking piece are connected to each other. Since it is press-fitted into the connection groove of the electromagnetic switch and the two electromagnetic switches are connected at the bottom end, adjacent electromagnetic switches can be connected at the bottom end in addition to the connection at the top end using the interlock means. This has the advantage of reliably preventing external forces that would try to separate the electromagnetic switch from reaching the interlock means, and ensuring stable interlocking operation based on the interlock means. They can be connected to each other with a simple one-touch operation such as press-fitting the locking piece into the connecting groove, and this has the advantage of being practically useful.

[Brief explanation of drawings]

FIG. 1 is an exploded perspective view showing an embodiment of the present invention;
Figure 2 is a vertical sectional view showing the connection style between the electromagnetic switches shown in the above, Figure 3 is a partially exploded perspective view showing the connection style between the lower ends of the electromagnetic switches shown in Figure 2, and Figure 4 is the same as the above. Fig. 5 is an exploded perspective view showing two types of large and small terminal blocks applied to electromagnetic switches, and a body unit shared by these, and Fig. 5 is a longitudinal cross-sectional view showing the connection style of electromagnetic switches having different types of terminal blocks. , FIG. 6 is a partially exploded perspective view showing the manner of connection between the lower ends of the electromagnetic switch shown in FIG.
36 is a locking piece.

Claims (1)

[Claims] 1 A plurality of electromagnetic switches are used side by side with their side end faces facing each other, and the upper ends of adjacent electromagnetic switches are connected, and when the contact of one electromagnetic switch is turned on, the other electromagnetic switch is turned on. Switch contact is ON
The lower surface of each electromagnetic switch is equipped with an interlock means that interlocks adjacent electromagnetic switches to prevent them from being driven to the side, and a locking piece that connects the lower ends of the adjacent electromagnetic switches. A connecting groove with one end open is formed on the side end surface, and both ends of the locking piece are press-fitted into the connecting grooves of each adjacent electromagnetic switch, so that both electromagnetic switches are connected at the lower end. A connecting structure for electromagnetic switches featuring: