JPH0329123B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an electromagnetic contactor with a latch that mechanically holds the electromagnetic contactor using a latch mechanism.

[Conventional technology]

As an electromagnetic contactor with a latch, which is closed by the excitation of a closing coil and which is held closed by a latch mechanism after closing, there is known, for example, the one shown in Japanese Utility Model Application Laid-Open No. 53-61673.

FIG. 5 is a diagram showing the structure of a conventional magnetic contactor with a latch disclosed in the above-mentioned Japanese Utility Model Publication No. 53-61673. In the figure, 201 is a closing coil, 202 is an armature (movable core), and 203 is a fixed Iron core, 2
06 is a crossbar, 207 is a movable contact, 211
216 is a lever, 221 is a tripping armature, and 225 is a tripping coil.

In this conventional example, the crossbar 206 engaged with the armature 202 is actuated by the excitation of the closing coil 201, and the movable contactor 207 is actuated.
comes into contact with the fixed contact 211 and the cross bar 216 rotates, causing the tip 2 of this lever 216 to rotate.
22 is supported by the lever receiver 223 of the tripping armature 221 which is in contact with this, and the closing is mechanically latched. Next, by excitation of the tripping coil 225, the lever 2 is moved from the lever receiver 223 of the tripping armature 221.
16 is tripped, releasing the latch.

[Problem that the invention seeks to solve]

In a conventional electromagnetic contactor with a latch, in which a latch mechanism is assembled to the contactor body in which the lever 216 is incorporated, and the lever and the armature (tripping core) 221 are engaged, the above-mentioned Even if a defect occurs due to variations in component parts, etc. in the engagement operation between the tip of the lever and the lever receiver of the armature, or the release operation in which the lever is removed from the lever receiver when releasing the latch, there is a Since it does not have an adjustment mechanism, there is a problem in that it is impossible or difficult to adjust the engagement or disengagement operation smoothly.

The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide an electromagnetic contactor with a latch in which the engagement portion of the latch mechanism can be easily adjusted.

[Means for solving problems]

The electromagnetic contactor with a latch of the present invention includes a movable core that closes a main circuit contact via a crossbar by excitation of a closing coil, a central portion of which is pivotably pivoted to the movable core or the crossbar, and the movable A lever that moves integrally with the iron core, a latch receiver rotatably pivoted to one end of the lever and provided with a moving hook portion that follows the lever, and the latch receiver slides in the moving direction of the movable iron core. a latch base that is guided by the latch base and fixed with its mounting surface facing the main body base; a hanger that is rotatably pivoted to a shaft fixed to the latch base and whose movable end is pressed into contact with the latch receiver and engaged with the hook part; , comprising a tripping electromagnet connected to the movable end of the latch, fixed to the latch base at a mounting surface perpendicular to the mounting surface of the latch base, and operative to disengage the latch from the latch receiver; In adjusting the engagement relationship between the latch receiver and the hook, the moving direction of the movable iron core is controlled by a fixed member of the latch base, and the direction perpendicular to the moving direction of the movable iron core is controlled by a component of the tripping electromagnet. It is configured as follows.

[Effect]

In this invention, the latch receiver is rotatably connected to one end of the lever, and its movement is guided by the latch base, and the hook rotatably connected to the latch base is connected to the trip iron constituting the electromagnetic means. The latch is biased by a spring to engage and latch the latch receiver, and the latch is released by energizing the electromagnetic means. The direction of movement of the receiver is determined by adjusting the dimensions between the latch base and the main body base, and the direction of rotation of the hanger is determined by adjusting the dimensions of the joint surface between the latch base and the electromagnet means or the joint surface between the electromagnet means and the yoke plate.

〔Example〕

Embodiments of the present invention will be described below with reference to FIGS. 1 to 4. In FIG. 1, 1 is a movable contact;
1a and 1b are fixed contacts, 2 is a cross bar that holds the movable contact 1, 3 is a movable core that is fixed to the cross bar 2 via a movable core pin 4, and 5 is a movable core pin 4 that passes through the intermediate portion. A pair of levers with holes provided therein are provided so as to be pivotally supported by the movable core pins on both sides in the stacking direction of the movable core 3, and a connecting body 6 is rotatably attached to one end thereof by a screw 7. The connecting body 6 is rotatably held by a shaft 9 supported by a base 8 of the main body. In addition, 10 is a screw 1 attached to the other end of the lever 5.
1, the latch is rotatably mounted.
This latch receiver 10 is provided with a hook portion 58 that engages with a hanger 18, which will be described later, and this hook portion 58 is slidable in grooves 13 provided in the latch base 12 that constitute a guide on both sides thereof. A protrusion (not shown) is provided. latch base 1
2 is fixed to the latch mounting plate 14 with screws 15, and the latch mounting plate 14 is fixed to the rail plate 1 with screws (not shown).
Furthermore, since the rail plate 16 is fixed to the base 8 by screws 17 shown in FIG. 2, the latch base 12 is fixed to the base 8 after all. The mounting surface of the latch base 12 and the latch mounting plate 14 is flush with respect to the groove direction of the sliding groove 13 of the latch receiver 10, that is, the sliding direction of the latch receiver 10. 18 is the shaft 1 on the latch base 12
9 is a hanger rotatably attached; 20 is a groove provided in the hanger 18; 21 is a tripping movable iron core whose shaft portion 22 is inserted into the groove 20;
23 is a tripping coil that has a columnar hole into which the tripping movable iron core 21 is inserted, and drives this movable ironcore; 24 is a yoke plate provided outside the tripping coil 23 so as to close one side of the columnar hole; 25
A spring is provided between the yoke plate 24 and the tripping iron core 21, and the tripping iron core 21 is attached to the above-mentioned hanger 18.
This applies force to the side. In addition, the latch mounting plate 1
4. A magnetic path is formed between the tripping iron core 21 and the yoke plate 24. The trip iron core 21, the trip coil 22, the push spring 25, etc. constitute the main part of the electromagnet means for latch trip, and this electromagnet means, the latch receiver 10, the latch base 1, etc.
2. The latch 18 and the like constitute the main part of the latch and its tripping mechanism.

Note that the electromagnet means is connected to the trip core 2.
1 with the surface facing up in the direction of movement of latch base 1
2, and the yoke plate 24 is removably attached to the back surface parallel to this mounting surface. 2
Reference numeral 6 denotes a fixed iron core facing the movable iron core 3, and 27 a closing coil that is housed in a coil case 28 and wound around the fixed iron core 26, which is fixed to the rail plate 16 together with the fixed iron core 26 and the coil case 28. 2
Reference numeral 9 denotes a self-demagnetizing switch constituting an opening/closing mechanism that cuts off the excitation current of the closing coil 27; numeral 30 denotes an actuating plate constituting an operating body that opens and closes the self-demagnetizing switch 29; one end is connected to a groove 3 formed in the latch base 12;
It is inserted into 1 and serves as a fulcrum for pivoting movement,
The bottom end is in contact with an auxiliary crossbar 32 which is an operating body for opening and closing the self-demagnetizing switch 29. and,
The hook 18 is inserted into the hole 34 provided in the central bent portion 33.
A shaft 35 connected to the latch base 12 is inserted, thereby holding the actuating plate 30 rotatably with respect to the latch base 12. In addition, in FIG. 2, 8a is a sliding groove of the cross bar 2. Further, 51 is a spacer inserted between the latch base 12 and the latch mounting plate 14, and by increasing or decreasing the spacer 51, the position of the latch receiver 12 of the latch base 12 relative to the latch mounting plate 14 in the moving direction is adjusted. Further, R is a gap between the yoke plate 24 and the tripping core 21, which is used to adjust the horizontal position of the tripping core 21 with respect to the yoke plate 24.

Next, the electrical connection configuration will be explained using FIG. 4. The closing coil 27 is connected in series with the contact portion 52 of the self-demagnetizing switch 29, and when the electromagnetic contactor is mechanically held, the contact portion 52 opens and is demagnetized. The tripping coil 23 is also connected in series with a normally open contact 55 of an auxiliary contact 54 operating in parallel with the main contact portion 53 so that it opens and is demagnetized when the mechanical retention of the magnetic contactor is tripped. It is configured.

Next, the operation of the electromagnetic contactor with the above configuration will be explained. FIG. 1 shows the open state after the latch mechanism has been released, and FIG. 3 shows the held state held by the latch mechanism.

For convenience of explanation, the operation of changing from the open state to the holding or latching state will be referred to as the closing operation, and the operation of changing from the held state to the released or unlatched state will be referred to as the tripping operation, and the closing operation will be explained first.

In FIG. 1, when the closing coil 27 is excited, the movable core 3 is attracted to the fixed core 26 against the spring pressure of a return spring (not shown), moves in the direction of arrow A, and is attached to the base 8 of the main body. sliding groove 8
Movable contact 1 via crossbar 2 sliding on a
The contact points of the fixed contacts 1a and 1b come into contact with each other, and one end of the lever 5 and the connecting body 6 rotate in the direction of arrow B about the screw 7, and the other end of the lever 5 and the latch receiver 10 fit into the groove of the latch base 12. 13 as a guide to move in the direction of arrow C. Movable iron core 3
is attracted to the fixed iron core 26, and when the corner 56 of the latch receiver 10 comes off from the corner 57 of the hanger 18, the hanger 18 moves in the direction of arrow D around the shaft 19, and the hook 58 of the latch receiver 10 is moved away from the corner 57 of the latch receiver 10. , hanger 18
The tip 59 of the is inserted. The movement of the hanger 18 is performed by the biasing force of the push spring 25 via the tripping iron core 21, the spring 43 via the operating plate 30, and the auxiliary crossbar 32.

A shaft 35 connected to the hanger 18 rotates in the direction of arrow D about the shaft 19 in the same way as the hanger 18, and an actuating plate 30 connected to the shaft 35 rotates in the direction of arrow E around the groove 31 of the latch base 12. Rotate to. When the tip of the actuating plate 30 rotates in the direction of arrow E, the auxiliary crossbar 3 biased by the spring 43
2 moves in the direction of arrow E, and the movable contact 40 separates from the fixed contact 39. When the contact portion 52 is opened, the closing coil 27 is demagnetized and the movable core 3 is moved back to the fixed core 2 by the action of a return spring (not shown).
6 and move in the opposite direction to the direction of arrow A. As the movable iron core 3 moves, the latch receiver 10 moves in the direction opposite to the direction of arrow C, but as shown in FIG.
Since the end portion 59 of the crossbar 2 comes into contact with the latch receiver 10 and locks it with the hook 18, the crossbar 2 is mechanically locked.
is held to complete the closing operation.

Next, the tripping operation will be explained.

In FIG. 3, when the trip coil 23 connected in series with the normally open contact 55 in the closed circuit state is excited, the trip core 21 is attracted to the yoke plate 24 against the spring pressure of the spring 25, and is attracted to the arrow F move in the direction. The hook 18 connected to the trip iron core 21 rotates in the direction of arrow G, and the hook 18 is disengaged from the latch receiver 10, so that the engagement is released. When the engagement is released, a return spring (not shown) moves the latch receiver 10 in the direction of arrow H using the groove 13 of the latch base 12 as a guide, the lever 5 moves in the direction of arrows H and J, and the connector 6 moves in the direction of arrow J. Then, the movable iron core 3 moves in the direction of arrow K, and the cross bar 2 moves in the direction of arrow K using the sliding groove 8a as a guide, and returns to the open state shown in FIG. 1. While the crossbar 2 is moving, the normally open contact 55 opens and demagnetizes the tripping coil 23.
Further, as the hook 18 moves, the actuating plate 30 and the auxiliary crossbar 32 move in the direction of arrow L, returning the contact portion 52 to the closed state.

Although the electromagnetic contactor according to this embodiment is constructed and operates as described above, the adjustment of the latch mechanism will now be described in conjunction with FIG.

During the closing operation, the latch 1 is attached to the latch receiver 10.
In order for the latch receiver 10 to engage, the corner 56 of the latch receiver 10 must be dimensioned to be removed from the corner 57 of the latch 18 in the direction C, as explained in the above-mentioned closing operation. Since the hanger 18 and the hanger 18 are held as separate parts, their dimensions must be adjusted.
Adjustment of this dimension is performed by adjusting the latch mounting plate 14 of the latch base 12, that is, the mounting surface of the main body base 8 to the latch receiver 14 provided on the latch base 12.
Because of the structure in which the sliding groove 13 is facing in the direction of the arrow C, loosen the screw 15 and insert the spacer 51 inserted between the latch base 12 and the latch mounting plate 14 attached to the main body base 8. This is easily done by increasing or decreasing.

Also, in the tripping operation, the latch receiver 10
In order to release the engagement of the latch 18, the corner portion 56 of the latch receiver 10 must be dimensioned to be removed from the corner portion 57 of the latch 18 in the direction of arrow G. Adjustment of this dimension is possible by adjusting the dimension of the gap R between the tripping iron core 21 and the yoke plate 24. First, the detachable yoke plate 24 is removed from the outer frame of the tripping coil 23, and the gap R is adjusted. The yoke plate 2
The gap R is adjusted by inserting a perforated magnetic spacer having an appropriate thickness between the outer frame of the tripping coil 23 and the tripping coil 23. To adjust the movement of the electromagnet, the mounting surface of the latch base 12 on which the electromagnet is attached is perpendicular to the axial direction of the tripping core 21, and between the latch base 12 and the outer frame of the tripping coil 23 constituting the electromagnet. Movement can be easily adjusted by inserting a spacer, etc.

〔Effect of the invention〕

As described above, the present invention includes a latch receiver that is pivotally connected to one end of the lever and moves while being guided by the latch base, and a latch that engages with the latch receiver, which is pivotally mounted on the latch base. In an electromagnetic contactor with a latch, the electromagnetic contactor is configured such that the electromagnetic means is energized to cause the latch receiver to latch, and the electromagnetic means is energized to release the latch. Since the latch receiver is provided so as to be adjustable with respect to the latch receiver, even if a defect occurs in the engagement relationship between the latch receiver and the hanger due to variations in component parts, it can be easily adjusted.

[Brief explanation of the drawing]

Fig. 1 is a diagram showing an open state of an electromagnetic contactor with a latch which is an embodiment of the present invention, Fig. 2 is a sectional view taken along the line - - of Fig. Figure 4 is an electrical connection diagram of a magnetic contactor with a latch, which is an embodiment of the present invention, and Figure 5 shows a conventional magnetic contactor with a latch in a latched state. It is a figure which shows a certain cross section. In the figure, 3 is a movable core, 5 is a lever, 10 is a latch receiver, 12 is a latch base, 13 is a groove, 18 is a hanger, 21 is a trip core, 23 is a trip coil, 24 is a yoke plate, and 25 is a push spring. , 26 is a fixed core, 51 is a spacer, and R is an opening. Note that the same reference numerals in the figures indicate the same or corresponding parts.

Claims (1)

[Claims] 1. A movable core that closes a main circuit contact via a crossbar by excitation of a closing coil; a lever that is pivotably pivoted near the center of the movable core or the crossbar and moves integrally with the movable core; A latch receiver is rotatably attached to one end of a lever and moves following the lever, and is provided with a hook portion, and the latch receiver is slid and guided in the moving direction of the movable iron core, and the mounting surface is attached to the main body base. a latch base fixed opposite to the latch base, a hanger rotatably pivoted on a shaft fixed to the latch base, the movable end of which is pressed into contact with the latch receiver and engaged with the hook portion, and the movable end of the hanger a trip electromagnet connected to the latch base and fixed to the latch base at a mounting surface perpendicular to the mounting surface of the latch base and operated to release the engagement between the latch receiver and the latch receiver; In adjusting the engagement relationship, the moving direction of the movable iron core is controlled by a fixing member of the latch base, and the direction perpendicular to the moving direction of the movable iron core is controlled by a component of the tripping electromagnet. Magnetic contactor with latch.