JPH0345408Y2 - - 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. This invention relates to an interlock device for a magnetic contactor.

[Background Art] First, a conventional interlock device for a magnetic contactor will be described. In FIGS. 6 to 10, each electromagnetic contactor 1 includes a body unit 5 containing a coil frame 3 around which a coil 2 is wound, a fixed core 4, a movable core 6, and a contact portion (not shown). It is constructed by combining the cover unit 7 which is installed inside. The cover unit 7 further includes a built-in contact section and is composed of a terminal block 9 from which a plurality of pairs of terminals 8 are exposed on the upper surface, and a frame 10 that is detachably connected to the lower surface of the terminal block 9. A movable iron core 6 is housed in the frame 10, and a terminal block 9 is connected to the body unit 5 via a frame 10. A movable body 12 having a pair of T-shaped first hooks 11 protruding from the upper surface thereof is housed in the frame 10 so as to be vertically movable, 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, and the movable body 12 is biased upward by a spring 14. When the coil 2 is excited, the movable core 6 is attracted toward the fixed core 4, so that the spring 14 The movable body 12 is pulled downward against the spring force, 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 projects from the upper surface of the contact driver 9 . The terminal block 9 and frame 10 constituting the cover unit 7 are engaged with each other by the first hook 11, and the cover unit 7 and the body unit 5 are connected to each other through attachment pieces 18 provided at both ends of the frame 10. They are connected by screws 19. 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 from being driven to the on side is attached so as to straddle the upper surface of both electromagnetic contactors 1, 1, and mechanically connects both electromagnetic contactors 1, 1. . 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 symmetrical sliders 22A and 22B constituting locking means are housed in 6 and 27 so as to be movable in the vertical direction. Slider 22A, 22
The lower part of B is an engagement recess 2 that is connected to the second hook 16.
3 have been removed respectively. Cylindrical roller 24
A coiled spring 25 is inserted into the insertion hole 24a.
is inserted, and both ends of this spring 25 are connected to the container body 2.
It is attached to the lower part of notches 28 and 29 formed in the side wall of 1 and is supported and fixed. Therefore, the roller 24 is moved between both sliders 2 as shown in FIG.
It will be located at the midpoint between 2A and 22B. The upper end portions of the sliders 22A, 22B abut against the lower surface of the cover 34 that covers the upper opening of the container body 21, thereby restricting the upward movement of the sliders 22A, 22B. Also, on one side of the vessel body 21, a sixth
As shown in Figure a, an opening 36 is provided for engagement between the second hook 16 and the approximately T-shaped engagement recess 23 formed at the lower end of the sliders 22A, 22B. 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, the engagement groove 38 that engages with the engagement protrusion 31 forms
It is formed by opening the vertical surface of the lateral side. Also,
A lock piece 32 is integrally formed at the end opposite to the fixing part 37. This locking piece 32 has elasticity, and an engaging step 33 is formed on the lower surface of the locking piece 32 so as to face the engaging protrusion 31 of the fixing piece 30.
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. The fixing piece 30 and the locking piece 32 are molded integrally with the container body 21.

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.
0a into the coupling recesses 23 of the sliders 22A and 22B, and at the same time, insert the fixing piece 30 of the interlock body 20 in the direction of the arrow shown in FIG. 8(a).
The coupling protrusion 31 of the magnetic contactor 1 is connected to the engagement groove 3 of one electromagnetic contactor
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 moves to the left by the recessed step 35A and hits the recessed step 35B of the other slider 22B, that is, the roller 24 fits into the recessed step 35B, so the slider 22B moves downward. prevent. Slider 22B contrary to the above
When the roller 24 is lowered downward, the roller 24 is pushed by the concave curved surface of the recessed step 35B and moves to the right in the figure, and the roller 24 fits into the recessed step 35A of the slider 22A, causing the slider 22A to move downward. It obstructs movement. In this way, the sliders 22A and 2 on the electromagnetic contactor 1 side that are not turned on
2B, the contact driver 15, the movable body 12, and the movable core 6 that are linked thereto are prevented from moving downward, and when one electromagnetic contactor 1 is in the on state, the other electromagnetic contactor 1 Adjacent electromagnetic contactors 1 are connected by an interlock body 20 so that the contactors 1 are not turned on. The above lock is automatically released by turning off the electromagnetic contactor 1 that is in the on state, that is, by returning the sliders 22A and 22B upward. In other words,
The spring 25 inserted into the roller 24 is located at the midpoint between both sliders 22A and 22B.
Since both ends of the roller 24 are supported and fixed, the return force of the spring 25 causes the roller 24 to move towards the slider 22A, 2.
It returns to the midpoint position of 2B. In addition, the recessed steps 35A and 35B of the sliders 22A and 22B
Since the surface that contacts the roller 24 is a concave curved surface, it is easy to push the roller 24 when the slider 22A or 22B moves downward, and
When the roller 24 returns, it returns quickly without being caught by the slider 22A or 22B.

In such a conventional example, as described above, the interlock body 20 connects two adjacent electromagnetic contactors 1, 1.
As shown in FIG. 6, a fixing piece 30 is formed on one side of the lower surface of the interlock body 20, and a locking piece 32 is formed on the other side in an unbalanced manner. Since the electromagnetic contactors 1, 1 are connected in an unbalanced manner, there is a problem that the coupling between the interlock body 20 and the electromagnetic contactor 1 is uncertain and the reliability of operation is poor.

[Purpose of the invention] The present invention has been provided in view of the above-mentioned points, and the engaging part of the interlock body for the electromagnetic contactors is formed symmetrically to ensure that two electromagnetic contactors are connected in a well-balanced manner. In addition, both symmetrically formed engagement steps are formed by one lock piece, so that the interlock body can be easily removed by operating this lock piece. It is an object of the present invention to provide an interlock device for an electromagnetic contactor which can be operated with a single touch.

[Disclosure of the invention] An embodiment of the invention will be described below with reference to the drawings. In the embodiment, the T-shaped second hook 16 is replaced with an L-shaped engaging protrusion 41.
Also, the engagement recesses 23 of the sliders 22A and 22B of the interlock body 20 are connected to the slider 22.
It is formed at the lower part of both sides of A and 22B. Although the overall structure is almost the same as the conventional example, the added parts that are the gist of the present invention will be explained. First, in FIGS. 2 and 3, L-shaped engagement protrusions 41 are integrally formed to protrude from the upper part of the movable body 12 corresponding to each pole, and a pair of engagement protrusions 41 are arranged at a predetermined interval. The ends are opened and the tips are facing each other. Further, at the rear of the upper surface of the electromagnetic contactor 1, a pair of protrusions 43 are integrally provided so as to protrude upward, with recesses 42 for engagement facing each other. The dimension between both protrusions 43 is
It is formed to be shorter than the length between 1 and 2. The front edge of the upper surface of the electromagnetic contactor 1 has an inclined surface 44 whose front edge side descends.
A step portion 45 having a diameter is integrally provided in a protruding manner. This stepped portion 45 is formed corresponding to the outer protrusion 41 side. Furthermore, an engaging groove 46 is cut in the side surface of the front edge side of the electromagnetic contactor 1 on the side opposite to the stepped portion 45 . In this embodiment, as shown in FIG. 2, the electromagnetic contactor 1 has a four-pole configuration, and each member is configured with two poles as one set.

The function of the interlock body 20 is basically the same as the conventional one, but as shown below, the electromagnetic contactor 1
The structure of the part that engages with is made different. That is, as shown in FIG.
Slider 2 is housed in 0 so that it can move up and down.
The lower parts of 2A and 22B are connected to the engaging protrusion 4 of the electromagnetic contactor 1.
1 is a substantially T-shaped engaging portion 47. An engagement recess 23 into which the tip of the engagement protrusion 41 is inserted is cut on both sides of the engagement part 47, and the engagement part 47 is inserted between both engagement protrusions 41 as shown in FIG. By slidingly inserting it into the interlock body 20, the tips of the pair of engagement protrusions 41 are engaged with the engagement recesses 23, and the sliders 22A, 22B of the interlock body 20,
The electromagnetic contactor 1 and the movable body 12 are connected and interlocked. In addition, both protrusions 4 of the electromagnetic contactor 1
An engaging protrusion 48 that engages between the interlock members 20 and 3 is integrally protruded from the container body 21 of the interlock body 20. This engaging protrusion 48 is formed into a substantially T-shape.
The engagement protrusion 48 is inserted between the recesses 42 formed in both protrusions 43, and the engagement protrusion 48 and the protrusion 4
3 are engaged with each other. L-shaped hook portions 50 are provided on both sides of the bottom surface of the interlock body 20.
is provided integrally protruding from the container body 21, and the tip of this hook portion 50 is connected to a groove 46 formed in the electromagnetic contactor 1.
It is inserted into the body and engaged. Further, a plate-like U-shaped elastic locking piece 51 is integrally formed inside the engaging portion 47 on the lower surface of the interlocking body 20, and the side piece of this locking piece 51 has the magnetic contactor 1 attached thereto. An engaging step portion 49 is formed which goes over the slope 44 of the step portion 45 and engages with the inside of the step portion 45 . Further, an operating portion 52 protrudes from the side wall of the interlock body 20 from the center of the lock piece 51.
extends laterally. These engaging portions 47, engaging protrusions 48, hook portions 50, and engaging step portions 49 of the locking pieces 51 are formed symmetrically on the lower surface of the interlock body 20, as shown in FIGS. 1 and 4. has been done.

Thus, the interlock body 20 is engaged with the adjacent electromagnetic contactors 1, 1 in the following manner. The interlock body 20 is slid backward from the adjacent front side of both electromagnetic contactors 1, 1, that is, from the stepped portion 45 side. Since the dimension between both the engagement protrusions 41 is wider than the width dimension of the engagement protrusion 48, the engagement protrusion 4
8 slides through between the engagement protrusions 41, and both sides of the engagement protrusion 48 are positioned within the recess 42 of the protrusion 43, so that the engagement protrusion 48 is engaged between both the engagement protrusions 43. At this time, the engagement protrusion 41 is inserted into the engagement recess 23 of the engagement portion 47.
The tip of the lock piece 5 is inserted and engaged, and the lock piece 5
One engagement step 49 climbs over the slope 44 of the step 45 of the electromagnetic contactor 1 and fits inside the step 45, and both steps 45 and 49 engage with each other. At the same time, the tip of the hook portion 50 is inserted into and engaged with the groove 46 of the electromagnetic contactor 1. Therefore, the rear engagement protrusion 48 and
The hook portions 50 on both sides of the front side and the engagement step portion of the lock piece 51 on the inside front side lock the interlock body 20.
is attached to the electromagnetic contactors 1, 1 in a well-balanced and secure manner, and the reliability of the operation of both the electromagnetic contactors 1, 1 is ensured. Also, the interlock body 20 can be removed by lifting the operation part 52 of the lock piece 51, disengaging the two stepped parts 45 and 49, and then sliding the interlock body 20 toward you. The interlock body 20 can be easily removed from the parts 1 and 1. Also, interlock body 2
0 is installed as described above, using the interlock body 20.
4th position with one touch by simply sliding the
It can be installed as shown in the figure.

[Effects of the invention] As described above, the invention includes a movable body that can move up and down in conjunction with the movable core that is attracted to the fixed core of the electromagnetic contactor, and an upper part of the movable body that protrudes from the top surface of the electromagnetic contactor. A pair of L-shaped engagement protrusions with opposing tips are integrally formed on one side of the upper surface of the electromagnetic contactor, and an engagement protrusion is formed at a distance shorter than the dimension between the pair of engagement protrusions. A pair of protrusions with opposing recesses, an engaging step portion having a sloped surface on the other side of the upper surface of the electromagnetic contactor, and an engaging step portion on the other side of the electromagnetic contactor. Each of the electromagnetic contactors is provided with an engagement groove formed on the side surface, and when the interlock body is slid from the other side of the upper surface of the electromagnetic contactor, the engagement protrusion of the movable body of the adjacent electromagnetic contactor The locking means is inserted between the protrusions and engaged, and is formed in a vertically movable member that has a substantially T-shaped tip; The engagement protrusion of the mold crosses over the slope of the step and engages with the inside of the step, and the tip is inserted from the outside into the engagement step formed inside the engagement portion and the groove. Since the L-shaped hook portions formed on the outside of the engaging portions are formed symmetrically on the lower surface of the interlock body, there is less space between the engaging protrusions than in the past. An engaging part that is inserted and engaged, an engaging protrusion that is inserted between the protrusions and engaged, an engaging stepped part that engages with the inside of the stepped part, and a hook that is inserted into the groove and engaged. By forming these symmetrically, each engaging portion can engage an adjacent electromagnetic contactor in a well-balanced manner, and also allows both symmetrically formed engaging steps to have elasticity. In addition, by forming an operating part protruding outward from the side surface of the interlock body at the approximate center of the lock piece, it is possible to lift the lock piece and disengage the two stepped parts. This allows the interlock body to be easily removed from the electromagnetic contactor by pulling the interlock body, and the attachment of the interlock body to both electromagnetic contactors is also easy.
Each engaging part can be inserted and engaged by sliding,
This has the advantage that it can be installed with one touch.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of the interlock body according to the embodiment of the present invention as seen from the bottom side, Fig. 2 is a perspective view of the electromagnetic contactor of the above, and Fig. 3 is a sectional view showing each of the engaging parts of the above. Fig. 4 is a plan view of the same as above when installed, Fig. 5 is a cross-sectional view of the main part, Fig. 6a is a perspective view of a conventional interlock body, and Fig. 6b is a cross-sectional view of the same interlock body as above. , FIG. 6c is a perspective view of the same roller as above, FIG. 7 is an exploded perspective view of the interlock body as above, FIGS. 8a and b are explanatory views of same as above, FIG. The figure is a sectional view showing the connected state same as above. 1 is an electromagnetic contactor, 20 is an interlock body, 4
1 is an engaging protrusion, 42 is a recess, 43 is a protrusion, 44 is an inclined surface, 45 is a stepped portion, 46 is a groove, 47 is an engaging portion,
48 is an engaging protrusion, 49 is an engaging stepped portion, 50 is a hook portion, 51 is a locking piece, and 52 is an operating portion.

Claims (1)

[Scope of utility model registration request] It is installed between the upper ends of adjacent magnetic contactors and the adjacent magnetic contactors to connect both magnetic contactors, and when the contact of one magnetic contactor is turned on, the contact of the other magnetic contactor is connected. An interlock device for a magnetic contactor comprising an interlock body having a locking means for interlocking adjacent magnetic contactors so as to prevent the contacts from being driven to the on side,
A movable body that can move up and down in conjunction with the movable core that is attracted to the fixed core of the electromagnetic contactor, and a pair of L-shaped bodies with opposing tips formed on the upper part of the movable body that protrudes from the top surface of the electromagnetic contactor. an engaging protrusion, and a pair of protrusions integrally protruding from one side of the upper surface of the electromagnetic contactor and having engaging recesses facing each other at a distance shorter than the dimension between the pair of engaging protrusions; The electromagnetic contactor includes an engagement step portion having an inclined surface that descends on the other side of the upper surface of the electromagnetic contactor, and an engagement groove formed on the other side of the electromagnetic contactor. The above-mentioned locking means is provided in each contactor and is inserted between and engaged between the engagement protrusions of the above-mentioned movable body of an adjacent electromagnetic contactor when the interlock body is slid from the other side of the upper surface of the electromagnetic contactor. an engaging portion formed into a vertically movable member and having a substantially T-shaped tip; an engaging projection portion having a substantially T-shaped tip that is inserted between the protrusions and engaged; and an inclined portion of the stepped portion. The tip crosses over the surface and engages with the inside of the stepped portion, and the tip is inserted into the groove from the outside and engages with the engaging stepped portion formed inside the engaging portion,
L-shaped hook portions formed on the outside of the engaging portion are formed symmetrically on the lower surface of the interlock body, and both of the symmetrically formed engaging step portions are formed into elastic lock pieces. An interlock device for an electromagnetic contactor, characterized in that an operating portion is formed approximately in the center of the lock piece and projects outward from a side surface of the interlock body.