JPH0887941A - Electromagnetic contactor - Google Patents

Abstract

PURPOSE: To provide an electromagnetic contactor excellent in assembly workability and maintainability, in the contactor wherein assembly can be executed substantially from one direction to facilitate inspecting and replacing a contact. CONSTITUTION: An upper insulating base 1 is divided into a primary side upper insulating base 16 and a secondary side upper insulating base 15 and movably held so as to form an opening part in an upper surface of a fixed insulating base case 2. In the primary side upper insulating base 16, secondary side upper insulating base 15 and the fixed insulating base case 2, a cushion rubber 7, fixed core 5, coil 4, movable part return spring and a movable part assembly part 3 are dropped in from an upper part and stored. After the part is stored, the primary side upper insulating base 16 and the secondary side upper insulating 15 are closed and fixed by a dustproof cover 10. As a result, assembly can be performed substantially form one direction, also to enable a contact to facilitate its inspection and replacement, and an electromagnetic contactor excellent in assembly workability and maintainability can be obtained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electromagnetic contactor, and more particularly to a structure capable of improving assemblability and maintainability.

[0002]

2. Description of the Related Art Conventional electromagnetic contactors generally use the structure and assembly method shown in FIGS. 1, 2, 3, and 4. That is, the fixed core 5, the shock-absorbing rubber 7 for shock absorption at the time of closing, and the coil 4 fitted into the central leg of the fixed core 5 are housed in the fixed insulating base case 2 and fixed by the contact spring 12. The movable insulating base 3 having the movable contact 8 attached to the movable core 6 and the upper insulating base 1 having the fixed contact 9 and the terminal screw 13 to cover the movable insulating base 3 have the upper insulating base 1 and the fixed insulating base 1. The base case 2 was assembled through the return spring 11 and fixed by the mounting screw 14. Further, the upper insulating base 1 has a structure in which a dustproof cover 10 is mounted on the upper portion thereof to prevent intrusion of dust and the like. In the conventional method of assembling an electromagnetic contactor, the movable insulating base 3 and the upper insulating base 1 are preassembled as an upper assembly as shown in FIG. 2, and the fixed core 5, the buffer rubber 7 and the coil 4 are mounted on the fixed insulating base case 2. It is stored and preassembled as a fixed part assembly as shown in FIG. 3, and these upper assembly and fixed part assembly are combined as shown in FIG.
The method of attaching 0 was common.

[0003]

In such a structure according to the prior art, since the upper assembly has the movable contact 8 preliminarily attached to the movable insulating base 3 as shown in FIG.
Assembling into the upper insulating base 1 is performed by inserting the movable insulating base 3 from the lower side of the upper insulating base 1 and then inserting the fixed contacts 9 along the grooves 1a on the input side and the output side of the upper insulating base 1 and by inserting the terminal screw. It was fixed by 13, and the return spring 11 was assembled from the lower side of the movable core 6. Further, as shown in FIG. 3, the fixed part assembly is assembled by inserting and fixing the cushion rubber 7, the fixed core 5 and the coil 4 into the fixed insulating base case 2 from above. Thereafter, as shown in FIG. 4, the upper assembly and the fixed portion assembly were combined, fixed with the mounting screws 14, and the dust cover 10 was mounted and assembled. Therefore, the assembly method and its structure have the following problems. (1) Since the upper assembly and the fixed portion assembly are separately assembled, and finally the two are combined and screwed, it takes a lot of assembly man-hours. (2) The upper assembly is inserted from the lower side of the upper insulating table 1 of the movable insulating table 3, the fixed contact 9 is inserted along the groove 1a on the side surface of the upper insulating table 1, and the lower part of the movable core 6 of the return spring 11 is inserted. Since it is mounted from the side, it is necessary to work in the order of the lower side, the side, and the lower side, and there are many changes in the direction of the work, making automation of assembly difficult. (3) When inspecting the contacts, the dust cover was removed, and the contact was difficult to see because it was visually observed through the gap between the input side and output side movable contacts and the fixed contacts. Further, when the contacts need to be replaced, there is a problem that it takes a lot of man-hours because the contacts are removed from the gap by tweezers or the upper assembly and the fixed assembly are divided and replaced. (4) Since the fixed contacts are respectively inserted from the input side and the output side and fixed to the upper insulating base, there is a problem that the fixed contacts are easily removed when a force is applied in the insertion direction and the reverse insertion direction during wiring.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an electromagnetic contactor which can be assembled from substantially one direction, and the contacts can be easily inspected and the contacts can be replaced easily, and the assemblability and maintainability are excellent. It is a thing.

[0005]

In order to achieve the above object, the present invention provides an electromagnetic contactor including a lower housing having an opening formed in the upper surface thereof, and a fixed iron core arranged at the bottom of the lower housing. , A coil mounted on the fixed iron core, a movable iron core arranged to face the fixed iron core so as to be freely attached to and detached from the fixed iron core, and a movable insulating base mounted on the movable iron core with a movable contact, Fixed contacts arranged on the primary side and the secondary side of the movable contact, respectively, and fixed contacts arranged on the primary side and mounted on the primary side and the secondary side, respectively. It is characterized by comprising an upper casing which is divided into a fixed contact side and is movable to a position where the fixed contact is prevented from interfering with the movable contact.

According to a preferred embodiment, each of the divided housings is rotatably supported by the lower housing, slidably held by the lower housing, or detachable from the lower housing. It is held freely.

In the electromagnetic contactor according to the present invention, a lower housing having an opening formed on an upper surface thereof, a fixed iron core arranged at a bottom portion of the lower housing, and a coil mounted on the fixed iron core are provided. A movable iron core that is arranged so as to face the fixed iron core and is provided so as to be able to come into contact with and separate from the fixed iron core, a movable insulating base that has a movable contact and is mounted on the movable iron core, and a primary side of the movable insulating base that faces the movable contact and Fixed contacts arranged on the secondary side,
The fixed housing includes an upper housing to which the fixed contact is mounted and which houses the movable insulating base. The opening of the lower housing is formed to have a size through which the fixed iron core and the coil can pass, and the upper housing is arranged on the primary side. It is characterized in that it is divided into a fixed contact side and a fixed contact side arranged on the secondary side, and is movable to a retracted position where the movable core and the movable insulating base can pass.

Further, according to the present invention, in an electromagnetic contactor, a lower housing having an opening formed on an upper surface thereof, a fixed iron core arranged at a bottom portion of the lower housing, and a coil mounted on the fixed iron core, A movable iron core that is arranged so as to face the fixed iron core and is provided so as to be able to come into contact with and separate from the fixed iron core, a movable insulating base that has a movable contact and is mounted on the movable iron core, and a primary side of the movable insulating base that faces the movable contact It has fixed contacts respectively arranged on the secondary side and an upper casing to which the fixed contacts are mounted and which houses a movable insulating base. The opening of the lower casing is formed to have a size through which the fixed iron core and the coil can pass. The upper housing is divided into a fixed contact side arranged on the primary side and a fixed contact side arranged on the secondary side, and is movable to a retracted position where the movable iron core and the movable insulating base can pass. Fixed contact is movable in the retracted position It is characterized in that the interference with the point is movable in up position is prevented.

[0009]

The lower housing has an opening formed on the upper surface thereof so that the fixed iron core and the coil can pass therethrough, and the upper housing has a fixed contact side and a secondary side arranged on the primary side. The fixed iron core, the coil, and the movable insulating base are divided into the fixed contact side and the movable iron core and the movable insulating base so that the movable iron core and the movable insulating base can move to the retracted position. It is possible to assemble it by dropping it into the body, which facilitates the automation of assembly of the main body and improves the assemblability. In addition, the fixed contacts are mounted on the upper housing and are divided into a fixed contact side arranged on the primary side and a fixed contact side arranged on the secondary side to prevent the fixed contact from interfering with the movable contact. Since it is configured so that it can move to the position where it is installed, it prevents interference between the fixed contact and the movable contact during assembly to improve the assemblability, and also inspects or replaces the fixed contact and the movable contact during maintenance, or the coil and iron core. It is possible to easily replace parts such as by simply opening the divided upper insulating base without removing the wiring to the fixed contacts.

Since the divided upper casings are rotatably supported by the lower casings or slidably held by the lower casings, the divided upper casings can be prevented from being lost during maintenance. . The upper housing detachably held by the lower housing has a wide opening and is excellent in workability.
The upper housing is divided into a fixed contact side arranged on the primary side and a fixed contact side arranged on the secondary side, and fixed contacts are mounted respectively, so that the fixed contact can be inserted from the inside of the upper insulating base. Therefore, it is possible to prevent the disconnection due to the force applied at the time of wiring and improve the reliability.

[0011]

Embodiments of the present invention will be described with reference to FIGS. The electromagnetic contactor according to the first embodiment of the present invention will be described with reference to FIGS. The structure of the electromagnetic contactor in this embodiment will be described with reference to FIG. The fixed insulating base case 2 as the lower housing is formed of an insulating material such as a resin molded product, and accommodates the fixed iron core 5, the cushioning rubber 7 for absorbing the impact when the pole is closed, and the coil 4, and the upper surface thereof. Is the fixed iron core 5,
It has an opening formed so that the cushioning rubber 7 and the coil 4 can pass therethrough. The fixed insulating base case 2 accommodates the fixed iron core 5, the buffer rubber 7, and the coil 4 to form a fixed portion. The movable portion is composed of a movable insulating base 3 having a movable contact 8 fixed by a contact spring 12 and a movable iron core 6 to which the movable insulating base 3 is fixed. The movable part is elastically held by the return spring 11 locked to the fixed part. An upper insulating base 1 as an upper housing is formed of an insulating material such as a resin molded product, and has a fixed contact 9 side and a secondary side (generally a load side) arranged on a primary side (generally a power source side). ) Is disposed on the fixed contact 9 side. The fixed contact 9 is fixed to the upper insulating base 1 by a terminal screw 13. Upper insulation base 1 is terminal screw 1
Hinge 2a, 2b is formed at the lower end portion on the side where 3 is provided, and is rotatably held by the fixed insulating base case 2. The hinges 2a and 2b may be fixed to each other with a pin or the like, or may be detachably fixed to each other by elastic engagement by a concave and convex portion formed of resin. At the closed position of the upper insulating base 1, the divided upper insulating bases 1 are butted against each other and are substantially closed at the central portion of the electromagnetic contactor. In this state, the movable part housed inside is covered by the upper insulating base 1,
Further, a dustproof cover 10 is attached to prevent dust from entering.

The upper insulating base 1 is rotatably held, and is configured to be movable to a retracted position where the movable iron core 6 and the movable insulating base 3 can pass during assembly and maintenance as shown in FIG. There is. 7 to 9 show an assembling method of the first embodiment of the present invention. 7 to 9, in order to avoid complication of the drawings, reference numerals are given to parts newly used in the process, and reference numerals of other parts are omitted, but the reference numerals of the respective parts are the same as those in FIG. Is. 7 (A) and 7 (B) are views showing the storage process of the fixed iron core and the coil. In FIG. 7 (A), the fixed iron core 5 and the buffer rubber 7 are stored from above in the fixed insulating base case 2, respectively, and then the same. In FIG. 1B, the coil 4 is housed in the fixed insulating base case 2 from above. The fixed contact 9 and the terminal screw 13 are fixed in advance to the secondary upper insulating base 15 and the primary upper insulating base 16, and the secondary upper insulating base 15 and the primary upper insulating base 16 are fixed insulating base case 2 respectively. It is rotatably attached by a hinge 2a serving as the secondary side rotation center and a hinge 2b serving as the primary side rotation center.
Fixed insulating base in a state in which the secondary upper insulating base 15 and the primary upper insulating base 16 are opened around the hinges 2a and 2b and are moved to a retracted position where the movable iron core 6 and the movable insulating base 3 can pass. Drop the parts into Case 2 from above. That is, first, the cushioning rubber 7 and the fixed iron core 5 are dropped, and then the coil 4 is dropped. FIG. 8 (A),
(B) is a figure which shows the storage process of a movable insulation stand, and the same figure (A).
Then, the return spring 11 is attached to the coil 4 housed in the fixed insulating base case 2 from above, and then the movable insulating base 3 is housed from above in FIG. That is, in the process of FIG. 8, the return spring 11 is dropped onto the upper part of the coil 4, and the movable insulating base 3 equipped with the contact spring 12 and the movable contact 8 is attached to the upper part of the return spring 11 in advance. It is dropped from above. When the electromagnetic contactor is attached to a control panel or the like, it is generally attached in a direction in which the movable insulating base 3 moves in the horizontal direction.
The return spring 11 is locked to the upper portion of the coil 4 by an elastic force or the like so that the return spring 11 does not separate from the upper portion of the coil 4. Figure 9
(A) and (B) are diagrams showing a process of combining a movable contact and a fixed contact to complete a product. In the same figure (A), the secondary upper insulating base 15 and the primary upper insulating base 16 are rotated. In this step, the movable insulating base 3 is closed, and the dust-proof cover 10 is used to fix the movable insulating base 3 from above to complete the product as shown in FIG.
That is, the secondary upper insulating base 15 and the primary upper insulating base 1
6 is rotated about the hinges 2a and 2b of the fixed insulating base case 2, and the position of the movable insulating base 3 is adjusted so that the movable contact 8 has an appropriate positional relationship with the fixed contact 9. Close the insulating base 3. A U-shaped dustproof cover 10 is attached on top of the closed secondary-side upper insulating base 15 and primary-side upper insulating base 16 and is fixed so as not to open carelessly. The appropriate positional relationship between the movable contact 8 and the fixed contact 9 differs depending on whether it is an a contact (normally open contact) or a b contact (normally closed contact). The movable contact 3 is fixed to the movable contact 8 by pressing it from above by a jig or by an engaging portion (not shown) with the shoulder of the movable iron core formed inside the upper insulating supports 15 and 16. 9 is adjusted to the proper position. As a result, all the parts can be dropped and assembled easily, and the assemblability can be improved and the assembly can be automated.

10 to 11 show an example of the method of inspecting and replacing parts of the electromagnetic contactor of this embodiment. In this example, an electromagnetic contactor is fixed to a device mounting plate 20 of a control panel by fixing means (not shown) such as screws or rails as shown in FIG. In this example, the electric wires 19 are connected to the pedestal 16. When inspecting the movable contact 8 and the fixed contact 9, or when replacing the contact and replacing the coil 4, as shown in FIG.
The dustproof cover 10 is removed, the secondary side upper insulating base 15 and the primary side upper insulating base 16 are rotated about hinges 2a and 2b, respectively, and are opened left and right to prevent interference between the fixed contact 9 and the movable contact 8. Move to a position where it will be prevented. As a result, the fixed contact 9 and the movable contact 8 can be reliably inspected, the state of the contact can be easily grasped, and the reliability is improved. Further, since the fixed contact 9 and the movable contact 8 do not interfere with each other at the time of attachment / detachment, the attachment / detachment is facilitated, and the movable contact 8 and the coil 4 can be easily replaced without removing the electric wire 19 and the workability at the time of maintenance is improved. The effect is obtained. In this embodiment, since the fixed contact 9 is fixed to the upper insulating bases 15 and 16 by the terminal screw 13, it is necessary to remove the terminal screw 13 when replacing the fixed contact 9.

The structure of the electromagnetic contactor according to the second embodiment of the present invention, and its inspection and parts replacement method will be described with reference to FIGS. In this embodiment, the fixed contact 9 and the terminal screw 13 are independently provided, and the fixed contact 9 can be replaced without removing the terminal screw 13. In this embodiment, the terminal 13a having the terminal screw 13 and the fixed contact 9 are formed as separate parts, and the fixed contact 9 is screwed onto the terminal 13a.
It is configured to be fixed at b. The other parts have the same structure as the first embodiment.

An example of a method of inspecting the electromagnetic contactor and replacing parts according to the present embodiment will be described. In this example, as shown in FIG. 12, an electromagnetic contactor is fixed to a device mounting plate 20 of a control panel by a fixing means (not shown) such as a screw or a rail, and the secondary side upper insulating base 15 and the primary side upper insulating board 15 are attached. There are electric wires 19 on the stand 16 respectively.
Is an example of connection. When the movable contact 8 and the fixed contact 9 are inspected, or when the contact is replaced and the coil 4 is replaced, first, as shown in FIG. 13, remove the dustproof cover 10 and remove the screw 13b, and then the second. As shown in FIG. 14, the secondary-side upper insulating base 15 and the primary-side upper insulating base 16 are pivoted around the hinges 2a and 2b, respectively, and are opened left and right.
As a result, the fixed contact 9 and the movable contact 8 can be reliably inspected, the state of the contact can be easily grasped, and the reliability is improved. Further, the movable contact 8 and the coil 4 can be easily replaced without removing the electric wire 19, and the workability at the time of maintenance can be improved. In this embodiment, the fixed contact 9 is the terminal 1.
Since it is a separate part from 3a, it is not necessary to remove the terminal screw 13 even when replacing the fixed contact 9 as shown in FIG. 15, and the fixed contact 9 can be replaced without removing the electric wire 19. .

A third embodiment of the present invention will be described with reference to FIGS. In this embodiment, a secondary upper insulating base 15 and a primary upper insulating base 16 are slidably held in a fixed insulating base case 2 and can be opened and closed by sliding. In this embodiment, as shown in FIG. 16, the upper insulating base guide groove 2 is formed around the upper opening of the fixed insulating base case 2.
c is formed, and guide grooves 15a and 16a that slidably engage with the upper insulating base guide groove 2c are formed in the upper insulating bases 15 and 16 so that the upper insulating bases 15 and 16 can move to the left and right. It is attached to the upper opening of the fixed insulating base case 2. The other parts are the same as in the first embodiment. That is, the fixed insulating base case 2 as the lower housing is formed of an insulating material such as a resin molded product, and accommodates the fixed iron core 5, the buffer rubber 7 for absorbing the impact when the pole is closed, and the coil 4.
The upper surface thereof has an opening formed to have a size through which the fixed iron core 5, the buffer rubber 7 and the coil 4 can pass. The fixed insulating base case 2 includes a fixed iron core 5, a cushioning rubber 7 and a coil 4.
Are accommodated to form a fixed part. The movable portion is composed of a movable insulating base 3 having a movable contact 8 fixed by a contact spring 12 and a movable iron core 6 to which the movable insulating base 3 is fixed. The movable part is elastically held by the return spring 11 locked to the fixed part. The upper insulating base 1 as the upper housing is formed of an insulating material such as a resin molded product, and is divided into a fixed contact 9 side arranged on the primary side and a fixed contact 9 side arranged on the secondary side. . The fixed contact 9 is fixed to the upper insulating base 1 by the terminal screw 13.
To be fixed. At the closed position of the upper insulating base 1, the divided upper insulating bases 1 are butted against each other and are substantially closed at the central portion of the electromagnetic contactor. In this state, the movable part housed inside is covered by the upper insulating base 1, and the dustproof cover 10 is attached to prevent intrusion of dust and the like.

At the time of assembly, the upper insulating bases 15 and 16 are moved to the left and right to a retracted position where the movable iron core 6 and the movable insulating base 3 can pass therethrough, and the first upper surface of the fixed insulating base case 2 is opened. As in the embodiment, all parts are dropped into the fixed insulating base case 2. After that, the secondary side upper insulating base 15 and the primary side upper insulating base 16 are moved to the center, the main body is closed, and the dustproof cover 10 is fixed. In this embodiment, the same effect as the first embodiment can be obtained. The procedure for assembling the electromagnetic contactor of this embodiment will be described with reference to FIGS.

In order to avoid complication of the drawings in FIGS. 17 to 20, reference numerals are given to parts newly used in the process, and reference numerals of other parts are omitted. It is the same as 16. 17 (A) and 17 (B) are views showing a storage process of the fixed iron core. In FIG. 17 (A), the upper insulating base 1 is shown.
5 and 16 are moved to the left and right to a retracted position where the movable iron core 6 and the movable insulating base 3 can pass, and the fixed insulating base case 2
In the standby state in which the upper opening is opened, and then, in FIG. 1B, the fixed iron core 5 and the buffer rubber 7 are housed in the fixed insulating base case 2 from above. The fixed contact 9 and the terminal screw 13 are previously fixed to the secondary upper insulating base 15 and the primary upper insulating base 16, and the secondary upper insulating base 15 and the primary upper insulating base 16 have their respective guide grooves 15a, 16a is engaged with the upper insulating base guide groove 2c of the fixed insulating base case 2 to be slidably held, and can be opened and closed by sliding along the upper insulating base guide groove 2c. FIG.
8 (A) and 8 (B) are views showing a coil and a return spring storing process. In FIG. 8 (A), the coil 4 is stored in the fixed insulating base case 2 from above, and then in FIG. The return spring 11 is attached to the coil 4 housed in the base case 2 from above. When the electromagnetic contactor is attached to a control panel or the like, the movable insulating base 3 is generally attached in a direction in which the movable insulating base 3 moves horizontally. Therefore, even in this state, the return spring 11 does not separate from the upper part of the coil 4, and the return spring 11 is a coil. Four
It is locked to the upper part by elastic force or the like. FIG. 19 (A),
(B) is a figure which shows the storage process of a movable insulation stand, and the same figure (A).
Then, the movable insulating base 3 is dropped from above onto the upper part of the return spring 11, and then the movable insulating base 3 is elastically held on the upper part of the return spring 11 in FIG. The lower part of the movable insulating base 3 is preliminarily attached to the movable iron core 6, and the upper part of the contact spring 1
2 and the movable contact 8 are mounted. 20 (A) and 20 (B) are views showing a process of combining a movable contact and a fixed contact to complete a product. In FIG. 20 (A), the secondary upper insulating base 15 and the primary upper insulating base 16 are shown. In this step, the movable insulating base 3 is closed by sliding it toward the center and fixed from the top by the dustproof cover 10 to complete the product as shown in FIG. That is, the position of the movable insulating base 3 is adjusted so that the movable contact 8 has an appropriate positional relationship with the fixed contact 9.
In this state, the secondary upper insulating base 15 and the primary upper insulating base 1
The movable insulating base 3 is closed by sliding 6 along the upper insulating base guide groove 2c of the fixed insulating base case 2 toward the center. Closed secondary side upper insulation base 15 and primary side upper insulation base 16
A U-shaped dustproof cover 10 is attached to the upper part of the and fixed so as not to open carelessly. The appropriate positional relationship between the movable contact 8 and the fixed contact 9 differs depending on whether it is an a contact (normally open contact) or a b contact (normally closed contact). The movable contact 3 is fixed to the movable contact 8 by pressing it from above by a jig or by an engaging portion (not shown) with the shoulder of the movable iron core formed inside the upper insulating supports 15 and 16. 9 is adjusted to the proper position. As a result, all the parts can be dropped and assembled easily, and the assemblability can be improved and the assembly can be automated.

FIG. 21 shows an example of a method of inspecting and replacing parts in this embodiment. When the movable contact 8 and the fixed contact 9 are inspected, or when the contacts and the coil 4 are replaced, the dustproof cover 10 is removed, and the secondary side upper insulating base 15 and the primary side upper insulating base 16 are provided with guide grooves. 15a and 16a are used to slide and open to the left and right. As a result, the movable contact 8
Since the fixed contact 9 and the fixed contact 9 are exposed, the fixed contact 9 and the movable contact 8 can be inspected surely, the state of the contact can be easily grasped, and the reliability is improved. Further, the movable contact 8 and the coil 4 can be easily replaced without removing the electric wire 19, and the workability at the time of maintenance can be improved. In this embodiment, since the fixed contact 9 is fixed to the upper insulating base 1 by the terminal screw 13, it is necessary to remove the terminal screw 13 when replacing the fixed contact 9, but the second embodiment If the fixed contact 9 and the terminal 13a are separated as shown in FIG.
It is not necessary to remove the terminal screw 13 even when replacing the fixed contact 9, and the fixed contact 9 can be replaced without removing the electric wire 19.

A fourth embodiment of the present invention will be described with reference to FIGS. In this embodiment, as shown in FIG. 22, the terminals and contact portions of the secondary side upper insulating base 15 and the primary side upper insulating base 16 are unitized to form a secondary side terminal unit 17, respectively.
The primary side terminal units 18 are detachably held in the fixed insulating base case 2. By removing the secondary side terminal unit 17 and the primary side terminal unit 18 from the fixed insulating base case 2, it is moved to a position where interference between the fixed contact 9 and the movable contact 8 is prevented. As a result, the fixed contact 9 and the movable contact 8 do not interfere with each other at the time of attachment / detachment, which facilitates attachment / detachment. Further, not only the terminals and the contact portions, but also the secondary upper insulating base 15 and the primary upper insulating base 16 are configured to be removed from the fixed insulating base case 2 as shown in FIG. The movable iron core 6 and the movable insulating base 3 may be moved to a retracted position where they can pass, and the upper opening of the fixed insulating base case 2 may be opened. The secondary-side upper insulating base 15 and the primary-side upper insulating base 16 may be detachably held by the fixed insulating base case 2 by elastic engagement by the uneven portion formed of resin, or detachable by screws or the like. Alternatively, it may be held by the fixed insulating base case 2. The configuration of the other parts is the same as that of the first embodiment. Figure 2
Reference numeral 3 shows the configuration of the secondary side upper insulating base 15 and the primary side upper insulating base 16 in this embodiment. In this embodiment, the fixed contacts 9 are fixed contact guide grooves 15b inside the upper insulating bases 15 and 16,
It is inserted from the inside of 16b and fixed by the terminal screw 13. In this embodiment, since the upper insulating bases 15 and 16 can be removed from the fixed insulating base case 2, the fixed contact 9 can be seen from the surroundings, which facilitates the inspection work. Terminal screw 13
In the case where the electric wire 19 (not shown) is connected to and wired in the present embodiment, even if the pulling of the electric wire 19 applies a force to the fixed contact 9 toward the outside of the upper insulating base, the insulating walls 15c, 1
It is possible to prevent the fixed contact 9 from falling off due to being restrained by 6c. This makes it possible to prevent the fixed contact 9 from coming off during wiring, thus improving safety and reliability.

In the above embodiment, the parts can be assembled from one direction, and the work of combining the movable contact and the fixed contact is facilitated, so that automatic assembly using an industrial robot or a manipulator can be facilitated.

[0022]

According to the present invention, it is possible to obtain an electromagnetic contactor which can be assembled from substantially one direction, in which contacts can be easily inspected and replaced, and which is excellent in assembling and maintainability. it can.

[Brief description of drawings]

FIG. 1 is a side sectional view showing a configuration of a conventional electromagnetic contactor.

FIG. 2 is a side view showing a configuration around contacts of a conventional electromagnetic contactor.

FIG. 3 is a side view showing a configuration of a fixed portion of a conventional electromagnetic contactor.

FIG. 4 is a side view showing a method for assembling a conventional electromagnetic contactor.

FIG. 5 is a side view showing the method of assembling the electromagnetic contactor according to the first embodiment of the present invention.

FIG. 6 is a side view of the electromagnetic contactor according to the first embodiment of the present invention with an upper insulating base opened.

7A and 7B are views showing an assembling process of the electromagnetic contactor according to the first embodiment of the present invention. FIG. 7A is a side view showing a fixed iron core storing process, and FIG. 7B is a coil storing process. It is a side view shown.

FIG. 8 is a diagram showing an assembly process of the electromagnetic contactor according to the first embodiment of the present invention, FIG. 8A is a side view showing a process of attaching a return spring to a coil, and FIG. It is a side view which shows the accommodation process of a movable insulation stand.

FIG. 9 is a diagram showing an assembling process of the electromagnetic contactor in the first embodiment of the present invention, FIG. 9 (A) is a side view showing a process of combining a movable contact and a fixed contact, and FIG. 9 (B) is a product. It is a side view showing a completed state.

FIG. 10 is a side sectional view showing a mounting state of the electromagnetic contactor on the control panel in the first embodiment of the present invention.

FIG. 11 is a side sectional view showing a state in which the upper insulating base is opened at the time of inspecting the electromagnetic contactor and replacing parts in the first embodiment of the present invention.

FIG. 12 is a side sectional view showing a configuration of an electromagnetic contactor according to a second embodiment of the present invention.

FIG. 13 is a side sectional view showing a state in which a dustproof cover and a screw are removed during maintenance of the electromagnetic contactor according to the second embodiment of the present invention.

FIG. 14 is a side sectional view showing a state where the upper insulating base of the electromagnetic contactor in the second embodiment of the present invention is opened by rotating it about a hinge.

FIG. 15 is a side sectional view showing a fixed contact exchange state of the electromagnetic contactor according to the second embodiment of the present invention.

FIG. 16 is a side view showing the method of assembling the electromagnetic contactor according to the third embodiment of the present invention.

FIG. 17 is a diagram showing an assembling process of the electromagnetic contactor according to the third embodiment of the present invention, FIG. 17A is a side view showing a standby state, and FIG. It is a side view.

FIG. 18 is a diagram showing an assembling process of the electromagnetic contactor in the third embodiment of the present invention, FIG. 18 (A) is a side view showing a coil housing process, and FIG. It is a side view which shows the process mounted.

FIG. 19 is a diagram showing an assembling process of the electromagnetic contactor according to the third embodiment of the present invention, FIG. 19 (A) is a side view showing a storing process of the movable insulating base, and FIG. It is a side view which shows the process of combining a fixed contact.

FIG. 20 is a diagram showing an assembling process of an electromagnetic contactor according to a third embodiment of the present invention, in which FIG. 20 (A) shows that a dustproof cover is mounted and fixed on the upper side of the upper insulating base on the secondary side and the primary side. FIG. 6B is a side view showing a step of performing the process, and FIG.

FIG. 21 is a side sectional view showing a state where the upper insulating base of the electromagnetic contactor in the third embodiment of the present invention is slid to the left and right to be opened.

FIG. 22 is a side sectional view showing a state where the upper insulating base of the electromagnetic contactor according to the fourth embodiment of the present invention is separated left and right and opened.

FIG. 23 is a side sectional view showing the structure of the upper insulating base of the electromagnetic contactor according to the fourth embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Upper insulating base, 1a ... Fixed contact guide groove, 2 ... Fixed insulating base case, 2a ... Output side rotation center, 2b ... Input side rotation center, 2c ... Upper insulating base guide groove, 3 ... Movable insulating base, 4 ... Coil, 5 ... Fixed iron core, 6 ... Movable iron core, 7 ... Buffer rubber, 8
… Movable contact, 9… Fixed contact, 10… Dust cover, 11…
Return spring, 12 ... Contact spring, 13 ... Terminal screw, 14 ... Mounting screw, 15 ... Output side upper insulating base, 16 ... Input side upper insulating base, 15a, 16a ... Guide groove, 16b ... Fixed contact guide groove

Claims (6)

[Claims] 1. A lower casing having an opening formed in an upper surface thereof, a fixed iron core arranged at a bottom portion of the lower casing, a coil attached to the fixed iron core, and a coil arranged to face the fixed iron core. A movable iron core that is attached to and detached from the fixed iron core, a movable insulating base that has a movable contact and is mounted on the movable iron core, and a primary side and a secondary side facing the movable contact. The fixed contacts respectively arranged, and the fixed contacts are mounted respectively and are divided into a fixed contact side arranged on the primary side and a fixed contact side arranged on the secondary side, and the fixed contacts are movable. An electromagnetic contactor comprising an upper housing configured to be movable to a position where interference with a contact is prevented. 2. The divided upper casings are rotatably supported by the lower casings respectively, and the fixed contacts are prevented from interfering with the movable contacts by opening the divided portions of the upper casing. The electromagnetic contactor according to claim 1, wherein the electromagnetic contactor is configured to move to a predetermined position. 3. The divided upper casings are slidably held by the lower casings respectively, and the fixed contacts and the movable contacts are made to slide by sliding the divided portions of the upper casing in an opening direction. The electromagnetic contactor according to claim 1, wherein the electromagnetic contactor is configured to move to a position where interference of the above is prevented. 4. The divided upper casings are detachably held by the lower casings respectively, and the fixed contacts are movable by opening the divided portions of the upper casings and separating them from the lower casings. The electromagnetic contactor according to claim 1, wherein the electromagnetic contactor is configured to move to a position where interference with the contact is prevented. 5. A lower casing having an opening formed on an upper surface thereof, a fixed iron core arranged at a bottom portion of the lower casing, a coil attached to the fixed iron core, and arranged to face the fixed iron core. A movable iron core that is attached to and detached from the fixed iron core, a movable insulating base that has a movable contact and is mounted on the movable iron core, and a primary side and a secondary side facing the movable contact. Each of the fixed contacts is provided with an upper housing in which the fixed contact is mounted and which houses the movable insulating base, and the opening of the lower housing is formed to have a size through which the fixed iron core and the coil can pass. The upper housing is divided into a fixed contact side arranged on the primary side and a fixed contact side arranged on the secondary side, and is movable to a retracted position where the movable iron core and the movable insulating base can pass. Electromagnetic contact characterized by being configured in Vessel. 6. A lower housing having an opening formed on an upper surface thereof, a fixed iron core arranged at a bottom portion of the lower housing, a coil attached to the fixed iron core, and a fixed iron core facing the fixed iron core. A movable iron core that is attached to and detached from the fixed iron core, a movable insulating base that has a movable contact and is mounted on the movable iron core, and a primary side and a secondary side facing the movable contact. Each of the fixed contacts is provided with an upper housing in which the fixed contact is mounted and which houses the movable insulating base, and the opening of the lower housing is formed to have a size through which the fixed iron core and the coil can pass. The upper housing is divided into a fixed contact side arranged on the primary side and a fixed contact side arranged on the secondary side, and is movable to a retracted position where the movable iron core and the movable insulating base can pass. It is configured in the Electromagnetic contactor, characterized in that contacts are configured to move to a position where interference is prevented between the movable contact.