JPH0723869Y2 - Electromagnetic contactor - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an electromagnetic contactor, and more particularly, to a structure of a terminal cover fitted to a terminal portion of the electromagnetic contactor.

BACKGROUND ART Conventionally, in an electromagnetic contactor, as shown in FIG.
The terminal portion is protected by covering the terminal portion with the terminal cover 4. A through hole 43 for inserting a jig for tightening the terminal screw is formed in the terminal cover 4, and a notch 41 for inserting the tip of the electric wire to the position of the terminal screw is formed. Then, when connecting to the terminal portion, the tip end of the electric wire is formed into a rod shape or a Y shape so that the tip end portion of the electric wire is sandwiched between the head of the terminal screw and the terminal plate. In this case, the terminal screw may be loosened or tightened by a jig such as a screwdriver inserted through the through hole 43 without removing the terminal cover 4, but as is generally done in Japan. If a crimp terminal with a round hole for inserting a terminal screw is attached to the tip of the wire, remove the terminal cover 4 to completely remove the terminal screw from the terminal board, and then attach the terminal screw to the crimp terminal. Need to be inserted. As described above, when the crimp terminal is used, it is necessary to remove the mounting screw 2 when attaching / detaching the terminal cover 4 to / from the body 1, and the wiring work is troublesome.

[Object of the Invention] The present invention has been made in view of the above-mentioned points, and its main purpose is to provide an electromagnetic contactor having a terminal cover which can be easily attached and detached and which facilitates connection work. To provide.

DISCLOSURE OF THE INVENTION (Embodiment) As shown in FIG. 1, a body 1 is composed of a box-shaped body 10 opened upward and a frame 11 fitted on the upper surface of the body 10. . The body 10 and the frame 11 are joined by fixing the four corners with fixing screws 7.

In the body 1, a drive coil 20, a fixed iron core 21, a movable iron core 22,
The drive frame body such as the movable frame 23 and the return spring 24 is housed, and the drive coil 20 is wound around a coil frame 25 having an axis in the upward direction.

The fixed iron core 21 is formed in a substantially E shape that is opened upward, and the center piece of the fixed iron core 21 is inserted into the coil frame 25 from below to form a drive coil.
It surrounds the bottom of 20. Drive coil 20 and fixed iron core 21
Is fixed to the body 10. The movable iron core 22 is formed in a substantially E shape that is opened downward, and the center piece thereof is a coil frame 25.
It surrounds the upper part of the drive coil 20 by being inserted into the. A movable frame 23 is integrally connected to the upper part of the movable iron core 22, and the movable iron core 22 and the movable frame 23 are biased upward by a return spring 24. A movable contact 26 held by a holding spring 29 is arranged in the movable frame 23.
Movable contacts 27 are fixed to both ends of each. A fixed contact 28 is arranged at a fixed position on the frame 11 so as to face the movable contact 27. The fixed contact 28 is fixed to one end of the terminal plate 3 fixed to the frame 11, and a terminal screw 31 is screwed to the other end of the terminal plate 3. The other end portion of the terminal plate 3 to which the terminal screw 31 is screwed is exposed from the side wall portion of the frame to form a terminal portion. A washer 32 is interposed between the head of the terminal screw 31 and the terminal plate 3, and the electric wire is sandwiched between the washer 32 and the terminal plate 3 when the terminal screw 31 is tightened. . A plurality of terminal plates 3 are arranged on the side surface of the body 1, and the terminal plates 3 are electrically insulated from each other by partition ribs (not shown) formed integrally with the frame 11. Engagement holes 15 are formed in the upper side wall of the frame 11, and a pair of holding ribs 12 are formed in the frame 11 so as to surround the terminal portion and in parallel with the partition ribs (that is, in parallel with the paper surface of FIG. 1). Is projected. On the inner surface of the retaining rib 12, a second
As shown in the figure, a guide groove 16 for holding both side edges of the terminal board 3 is formed.
Are formed. The terminal plate 3 is placed on the platform 17 formed between the holding ribs 12 on the upper side of the body 1,
This platform 17 is provided with a screw receiving hole 18 into which the terminal screw 31 is inserted. A counter sink 33 to be inserted into the screw receiving hole 18 is projectingly provided at a position corresponding to the screw receiving hole 18 in the terminal plate 3, and a screw groove which is screwed into the terminal screw 31 is provided on an inner peripheral surface of the counter sink 33. Has been cut.

The terminal cover 4 is fitted on the terminal portion configured as described above. The terminal cover 4 is made of an elastic synthetic resin and has a substantially L-shaped cross section. The tip of the lateral piece of the terminal cover 4 contacts the outer surface of the side wall of the frame 11 so as to cover the terminal. Arranged to touch. The upper surface of the horizontal piece is located slightly lower than the upper surface of the frame 11, and a step is formed between them. The side wall portion of the frame 11 also abuts on the outer side surface, and the elastic piece 44 is extended from the essential part of the tip end portion of the horizontal piece along the side wall portion of the frame 11, and the elastic piece 44 has the engaging projection 45. It is provided so as to project toward the body 1. Engagement protrusion
A locking hook 46 is projectingly provided at the tip of 45, and by engaging the locking hook 46 with the engaging hole 15 formed in the frame 11, the terminal cover 4 can be detachably attached to the frame 11. It is designed to be attached to. A plurality of through holes 43 are formed in the center of the lateral piece of the terminal cover 4 corresponding to each terminal plate 3, and the tip of a fastener such as a driver is inserted through the through holes 43 to insert the terminal screw. 31 tightening is done. A pair of holding pieces is provided on the peripheral edge of the opening of the through hole 43.
47 extends downward, and a hooking piece 48 protruding inward is provided at the lower end of the holding piece 47. A cross-shaped release hole 49 as shown in FIG. 2 is formed near the central portion of the horizontal piece that comes into contact with the side wall of the frame 11 and on the rear side of the locking hook 46. The release hole 49 is formed so as not to penetrate the lateral piece of the terminal cover 4. Further, a stopper 50 is provided on the periphery of the release hole 49 and near the through hole 43.
Is projected. As shown in FIG. 2, on the vertical piece of the terminal cover 4, a notch 41 is formed at a position corresponding to each partition rib, and a fitting groove 42 is formed at the bottom edge of the notch 41.
With the terminal cover 4 mounted on the frame 11, the lower end of the vertical piece abuts on the upper surface of the platform 17, and the fitting groove 42 is fitted on the upper part of each partition rib to position the terminal cover 4 with respect to the frame 11. Done. Further, as shown in FIG. 2, guide ridges 19 are provided on both side surfaces of the horizontal piece of the terminal cover 4 so as to extend along the horizontal piece.
The terminal cover 4 is held by the frame 11 by being fitted into.

Since the terminal cover 4 is configured as described above, the head of the terminal screw 31 is held between the tips of the holding pieces 47 when the product is shipped, as shown in FIG.
As a result, the tip of the terminal screw 31 floats from the platform 17, and when the round crimp terminal connected to the tip of the electric wire is electrically connected to the terminal board 3, the lower end of the terminal cover 4 and the platform. The round crimp terminal can be inserted through the gap formed between the terminal screw 31 and the terminal screw 31 by aligning the hole position of this crimp terminal with the terminal screw 31 and inserting it through the through hole 43. If you try to screw it to the terminal board 3, the hook 48 will pull the terminal screw 31
The holding screw 47 is opened by being pushed by the head of the terminal screw 31 and the head of the terminal screw 31 passes through the hooking piece 48, and then the terminal screw 31 is screwed into the terminal plate 3. That is, as shown in FIG.
The round-shaped crimp terminal 8 can be sandwiched between the washer 32 and the terminal plate 3 in the same manner as in the case where the tip end of the is bonded to the terminal plate 3 by a method such as rod crimping or Y crimping. Therefore, when the round crimp terminal 8 is connected, the connection can be made without removing the terminal cover 4. On the other hand, bar crimping and Y
In the case of die crimping, when the electric wire 5 is removed here and then the electric wire 5 is to be connected again, the terminal screw 31 may be loosened. When the terminal screw 31 is loosened, as shown in FIG. In addition, the head of the terminal screw 31 contacts the hooking piece 48 at the tip of the holding piece 47, so that the terminal screw 31 is prevented from falling off. Further, in this state, the tip end portion of the terminal screw 31 is kept screwed to the terminal plate 3. By the way, as described above, only by loosening the terminal screw 31, it is possible to loosen only the position where the head of the terminal screw 31 comes into contact with the hooking piece 48, and at this time, the tips of the legs of the terminal screw 31. Since it is kept screwed to the terminal plate 3, the round crimp terminal 8 cannot be removed only by loosening the terminal screw 31. That is, it is necessary to remove the terminal cover 4 from the body 1 in order to remove the electric wire 5 connected using the round crimp terminal 8. Therefore, the terminal cover 4 can be removed by pushing the tip of the jig 6 such as a driver into the release hole 49 as shown in FIG. When the terminal cover 4 is pushed into the release hole 49 of the jig 6 in this manner, an external force directed downward (left side in FIG. 6) acts on the terminal cover 4, and the lateral piece of the terminal cover 4 is made of elastic synthetic resin. 1 bends downward in FIG. 1 in the vicinity of the release hole 49 by its own elasticity, and as a result, the locking hook 46 is bent by the elasticity of the elastic piece 44 and the engaging projection 45 so as to be disengaged from the engaging hole 15. From this state, the terminal cover 4 can be easily removed from the body 1 by twisting the jig 6 upward in FIG. 6 using the corner of the frame 11 as a fulcrum. Stopper 50 when prying jig 6
This prevents the jig 6 from coming off from the release hole 49, and the force from the jig 6 can be surely applied to the terminal cover 4. Further, since the release hole 49 is formed in a cruciform shape, either a minus driver or a plus driver can be used as the jig 6.

After removing the terminal cover 4 from the body 1 and loosening the terminal screw 31 to remove the round crimp terminal 8, the head of the terminal screw 31 is again clamped by the holding piece 47 at the same time as when the terminal screw 31 is shipped. If attached to the body 1, the round crimp terminal 8 can be easily connected in addition to the rod crimping, the Y crimping, as in the state after shipping.

[Advantages of the Invention] As described above, the present invention is an electromagnetic contactor including a terminal cover for covering a terminal portion exposed on an outer peripheral portion forming a platform of a body, wherein the terminal cover is provided with a terminal at a position corresponding to a terminal screw. A through hole for inserting a fastener for tightening the screw is drilled, and the head of the terminal screw is elastically clamped while the tip of the leg of the terminal screw is separated from the terminal plate at the peripheral edge of the opening of the through hole. The head of the terminal screw that is clamped by the force when screwing the terminal screw to the terminal plate can pass, and when the terminal screw that is screwed into the terminal plate is loosened, the terminal remains in the screwed state with the terminal plate. Since the holding piece provided with the hooking piece with which the head of the screw comes into contact with the tip is extended downwardly, it is possible to prevent the terminal screw from being dissipated by holding the terminal screw between the holding pieces at the time of shipping. There is an advantage. Moreover, in this state, the tip of the terminal screw is separated from the terminal plate, so if you insert the round crimp terminal into the gap between the terminal screw and the terminal plate and then tighten the terminal screw, the head of the terminal screw Part passes through the hook and the legs of the terminal screw are screwed onto the terminal plate,
After that, the round crimp terminal can be connected to the terminal board by tightening the terminal screw. That is,
There is an advantage that the round crimp terminal after shipping can be easily performed without removing the terminal cover. Also, in the case of bar crimping or Y-type crimping, the connection can be made as usual by sandwiching it between the head of the terminal screw and the terminal plate.

On the other hand, when the connection with the electric wire is released, the terminal screw can be removed only by loosening the terminal screw if it is a bar crimp or a Y-shaped crimp. At this time, since the head of the terminal screw contacts the tip of the holding piece while maintaining the screwed state with the terminal plate, the terminal screw is prevented from falling off and being lost. To remove the round crimp terminal, it is necessary to remove the terminal cover from the body, but the terminal cover is made of an elastic material, and the portion where the terminal cover and the frame side wall portion of the body contact each other must be removed from the terminal cover. An elastic piece is integrally extended along the side wall of the frame, and a locking hook is provided at a tip portion of the elastic piece, and an engaging projection that engages with an engaging hole opened in the side wall of the frame is provided. The terminal cover is provided with a release hole in the vicinity of the central portion that comes into contact with the frame side wall and on the back side of the locking hook into which the tip of a jig for removing the terminal cover from the body can be inserted. Since a stopper is provided on the periphery of the release hole so that the tip of the jig comes into contact with it, when removing the terminal cover from the body, insert the jig such as the tip of the driver into the release hole to remove the terminal cover. If pressed, the terminal cover will Due to elasticity, the engaging projection is bent at the peripheral portion of the release hole, and the engaging projection is pressed by the opening edge of the engaging hole and bends to release the engagement state between the engaging hook and the engaging hole. Has the advantage that it can be easily removed. Moreover, since the jig comes into contact with the stopper, the pressing force is applied to the terminal cover to release the engagement state between the locking hook and the engagement hole, and at the same time, the engagement projection is pulled out from the engagement hole. The jig does not come off from the release hole because it is in contact with the stopper at this time. In short, it is possible to release the engagement state between the body and the terminal cover and remove the terminal cover from the body only by applying a pressing force with a jig. For example, force can be applied easily and the terminal cover can be removed with a simple jig. Moreover, the elasticity of the terminal cover and the engaging projections is used to remove the terminal cover. In the state in which the terminal cover is connected to, there is an advantage that the locking hook and the engaging hole can be deeply engaged to firmly connect the terminal cover to the body.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention, FIG. 2 is an exploded perspective view of essential parts of the same, FIGS. 3 to 5 are sectional views showing examples of use of the same, and FIG. FIG. 7 is a cross-sectional view of an essential part showing a state where the cover is removed from the body, and FIG. 7 is a perspective view showing a conventional example. 1 is a body, 3 is a terminal plate, 4 is a terminal cover, 10 is a body,
11 is a frame, 15 is an engaging hole, 17 is a platform, 31 is a terminal screw, 43 is a through hole, 44 is an elastic piece, 45 is an engaging protrusion, 46 is a locking hook, 47 is a holding piece, and 48 is a hooking piece. , 49 is release hole, 50
Is a stopper.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) Bibliographic references Sho 58-147142 (JP, U) Actual public 55-43613 (JP, Y2) Actual public 57-51448 (JP, Y2)

Claims (1)

[Scope of utility model registration request] Claim: What is claimed is: 1. An electromagnetic system comprising a terminal cover which covers a terminal portion exposed on an outer peripheral portion which forms a platform of a body constituted by a body accommodating a drive portion main body and a frame fitted on the upper surface of the body. In the contactor, the terminal portion is provided with a terminal plate into which the terminal screw is screwed, the terminal cover is made of an elastic material, and a through hole for inserting a fastener for tightening the terminal screw is formed at a position corresponding to the terminal screw. When the head of the terminal screw is elastically clamped and the terminal screw is screwed to the terminal plate in a state where the tips of the legs of the terminal screw are separated from the terminal plate at the opening peripheral edge of the through hole. The head of the terminal screw can be passed by the force of the terminal screw, and when the terminal screw screwed to the terminal plate is loosened, the head of the terminal screw contacts the tip while maintaining the screwed state with the terminal plate. Holding piece provided with a piece droops An elastic piece is integrally extended from the terminal cover along the frame side wall at a portion where the terminal cover and the frame side wall of the body contact each other. The terminal cover is provided with an engaging protrusion that engages with an engaging hole that opens in the side wall of the frame, and the terminal cover is provided on the rear side of the locking hook near the central portion that abuts the side wall of the frame. An electromagnetic contactor comprising a release hole into which a tip of a jig for inserting the cover from the body can be inserted, and a stopper with which the tip portion of the jig abuts is projected from the periphery of the release hole.