JPS6245410Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field] The present invention relates to a connection structure for electromagnetic switches, 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, when the other contacts This invention relates to a connection structure for electromagnetic switches that are used in conjunction so that the contacts are not turned on.

[Background Art] In general, a plurality of electromagnetic switches are arranged side by side, and adjacent electromagnetic switches are interlocked so that when the contact of one switch is in the on state, the contact of the other switch is turned on. In the case of interlocking so as not to occur, an interlock means is used to mechanically connect the movable members that drive the contacts in each electromagnetic switch. 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 the adjacent electromagnetic switches due to the connection position with the movable member. Because they are installed in a straddling manner, the bonding force between the two electromagnetic switches below this joint becomes weaker, and as a result, even when the electromagnetic switch is used with screws fixed to a mounting plate, etc. When used simply side-by-side on a rail such as a so-called DIN rail, if an external force that attempts to separate the electromagnetic switches acts on the lower ends of the electromagnetic switches, this force is directly applied between the upper ends of both electromagnetic switches. on the connecting part of the interlock means that connects the
There is a problem in that the interlocking operation by the interlock means is hindered, or worse, the connecting portion of the interlock means itself is damaged.
Furthermore, in this type of electromagnetic switch, the terminal block that is detachably attached to the top of the body unit is replaced depending on the current capacity used, but the dimensions of the terminal block differ depending on the current capacity. Depending on the size of the terminal blocks used, when electromagnetic switches are arranged side by side, the distance between commonly used body units, that is, the spacing between the lower parts of both electromagnetic switches will also differ. Therefore, in order to connect electromagnetic switches to solve the above problem, it is necessary to not only make the connection easy but also to adjust the spacing between the lower ends of the electromagnetic switches, which varies depending on the type of terminal block used. It is desirable to be able to reliably connect adjacent electromagnetic switches without being affected.

[Purpose of invention]

This invention was created in view of the above points,
The purpose of this is to easily and reliably connect electromagnetic switches used in conjunction with each other using interlock means, to ensure stable interlocking operation, and also to ensure stable interlocking operation due to the difference in current capacity used. An electromagnetic switch that can securely connect adjacent electromagnetic switches at the lower end without being affected by the size of the terminal block, even when using terminal blocks with different sizes, and maintain stable interlocking operation using an interlock means. The purpose is to provide a connected structure.

[Disclosure of invention]

In the electromagnetic switch connection structure according to the present invention, the electromagnetic switch is constructed by selectively coupling terminal blocks with different lateral dimensions depending on the required current capacity onto a body unit of the same size. A plurality of electromagnetic switches are arranged side by side with their terminal block side end faces facing each other, and adjacent electromagnetic switches are arranged 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 that interlocks the switches, and spacers are inserted in the gaps created between the body units of adjacent electromagnetic switches depending on the dimensions of the terminal block used. A dovetail groove is formed on one side of each body unit and one side of the spacer, and a protrusion that fits into the dovetail is formed on the other side of the body unit and the other side of the spacer, so that adjacent electromagnetic switches are connected to each other in the body unit. A structure is disclosed in which the dovetail groove and the protrusion on the side surface of the spacer are connected by fitting.

The present invention will be described in detail below based on embodiments shown in the figures. Each electromagnetic switch 1 combines a body unit 5 containing a coil frame 3 around which a coil 2 is wound and a fixed iron core 4, and a cover unit 7 containing a movable iron core 6 and a contact portion (not shown). It is composed of 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. Movable iron core 6
The terminal block 9 is connected to the body unit 5 via the frame 10. frame 1
A movable body 12 from which a pair of first hooks 11 protrude from the upper surface is housed in the movable body 12 in a vertically movable manner.
A movable iron core 5 is attached to the lower end of the terminal block 9, and the first hook 11 is removably engaged with a contact driver 15 provided in the terminal block 9, which is movable up and down. This frame 10 is coupled to the upper end of the body unit 5 and is biased upward by a spring 14, so that when the coil 2 is energized, the movable iron core 6 is connected to the fixed iron core 4.
By being attracted to the side, the movable body 12 is pulled downward against the spring force of the spring 14, and the contact drive element 15 that engages with the first hook 11 is moved downward, and the contact part in the terminal block 9 is moved downward. The contact driver 15 is mounted on the top surface of the terminal block 9.
A second hook 16 that is interlocked with is protruding. Terminal block 9 and frame 10 forming cover unit 7
The cover unit 7 and the body unit 5 are connected by means of the snap rings 17 provided at both ends of the frame 10 in addition to the engagement by the first hook 11 described above, and the cover unit 7 and the body unit 5 are connected by the attachment pieces 18 provided at both ends of the frame 10 to the body unit 5. They are connected by screws 19 that pass through.

In the figure, reference numeral 20 indicates a device in which the adjacent electromagnetic switches 1 are connected using the second hook 16, so that both electromagnetic switches 1 are interlocked, 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 axis 2
The tip of an arm 27 that extends left and right at the upper end is pivoted so as to be rotatable left and right around the horizontal shaft 25, and is biased upward by a spring 26 disposed between the horizontal shaft 25 and the horizontal shaft 25. Each tapepet rod 21
The stopper 23 is pressed against the lower surface of a protrusion 28 that protrudes 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 . Incidentally, in each electromagnetic switch 1, when the contact driver 15 is attracted and driven downward together with the movable iron core 6 through the first hook 11, the contact part is turned on, and the adjacent electromagnetic switch When one of the electromagnetic switches 1 in the device 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 axis 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 , the movable iron core 6 is prevented from moving downward, and when one electromagnetic switch 1 is in the on state, the adjacent electromagnetic switch 1 is connected so that the other electromagnetic switch 1 is not turned on. The switches 1 are connected by interlock means 20. The above-mentioned lock is automatically released by turning off the electromagnetic switch 1 which 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, 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. 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 As a result, a gap inevitably occurs between the lower ends of adjacent electromagnetic switches 1, that is, between both body units 5, and even if a gap occurs, adjacent electromagnetic switches 1 can be connected to each other by the interlocking means described above. 20, dovetail grooves 30 extending over the entire length of the upper and lower sides are formed on one side of a spacer 32 prepared to close this gap and on one side of each body unit 5. Projection 3 that fits into
1 is the other side of the spacer 32 and the body unit 5
Similarly, it is formed on the other side over the entire length of the top and bottom. Therefore, as shown in FIG. 2, even if the terminal blocks 9 used in adjacent electromagnetic switches 1 are different and there is a gap between the body units 5 of both electromagnetic switches 1, by using this spacer 32, both electromagnetic switches 1 can be connected. The switches 1 are reliably connected to each other at their lower ends, and adjacent electromagnetic switches 1 are connected to each other by the body units 5 in addition to being connected to each other by the interlock means 20 at their upper ends. Also,
The interlock means 20 is installed on the electromagnetic switch 1.
This is done after the dovetail groove 30 and the protrusion 31 are connected, which can be easily fitted by simply sliding them up and down. Note that the terminal block 9 has the same dimensions as the body unit 5.
Of course, when connecting the electromagnetic switches 1 having the same structure, it is possible to remove the spacer 32 and directly connect the body units 5 to each other by fitting the dovetail grooves 30 and the protrusions 31 together. Further, in this embodiment, the above-mentioned dovetail grooves 30 and protrusions 31 are formed up to a portion extending to the above-mentioned frame 10 located above the body unit 5.

[Effect of idea]

As described above, the present invention has a plurality of electromagnetic switches configured by selectively connecting terminal blocks with different lateral dimensions depending on the required current capacity onto a body unit of the same size. The terminal blocks are lined up horizontally with their end faces facing each other, and spacers are inserted in the gaps created between the body units of adjacent electromagnetic switches depending on the dimensions of the terminal blocks used. A dovetail groove running in the vertical direction is formed, and a protrusion that fits into the dovetail groove is formed on the other side of the body unit and the other side of the spacer. Because they are connected by fitting the groove and the protrusion, adjacent electromagnetic switches can be connected not only at the top end using the interlocking means but also at their sides, and it is possible to separate the electromagnetic switches by separating them. This has the advantage that external forces applied to the interlock means can be reliably prevented and stable interlocking operation based on the interlock means can be guaranteed. It has the advantage that it can be combined with a simple one-touch operation and is useful in practice. Moreover, even if a gap appears between the body units of adjacent electromagnetic switches when terminal blocks of different sizes are used due to the difference in the current capacity used, the adjacent electromagnetic switches can be connected via a spacer that closes this gap. They can be reliably connected to each other at their lower ends, and in this case as well, there is an advantage that stable interlocking operation by the interlock means can be guaranteed, as in the above case.

[Brief explanation of the drawing]

Figure 1 is an exploded perspective view showing two types of large and small terminal blocks applied to the electromagnetic switch of the present invention and a body unit commonly used for these. 1 is a longitudinal cross-sectional view showing the connection style of the parts, in which 1 is an electromagnetic switch, 5 is a body unit, 20 is an interlock means, and 30 is a
31 is a dovetail groove, 31 is a protrusion, and 32 is a spacer.

Claims (1)

[Scope of utility model registration request] It is constructed by selectively connecting terminal blocks with different dimensions in the lateral direction depending on the size of the required current capacity onto a body unit of the same size, and the terminal blocks are arranged side by side with their side end faces facing each other. It connects the upper ends of multiple electromagnetic switches used in the field and the upper ends of adjacent electromagnetic switches, and when the contact of one electromagnetic switch is turned on, the contact of the other electromagnetic switch is driven to the on side. It is equipped with an interlock means for interlocking adjacent electromagnetic switches so as to prevent this, and a spacer that can be accommodated in the gap left between the body units of adjacent electromagnetic switches depending on the size of the terminal block used. , dovetail grooves are formed on one side of each body unit and one side of the spacer, and protrusions that fit into the dovetail grooves are formed on the other side of the body unit and the other side of the spacer, respectively;
A connecting structure of electromagnetic switches in which both adjacent electromagnetic switches are connected by fitting the dovetail grooves and protrusions on the side surfaces of each body unit or spacer.