JPH0668312U - Terminal device - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a terminal device that facilitates connection work of a connection conductor. [Structure] A neck portion 13 in which a screw portion 11 and a head portion 12 and a metal plate 14 that is continuously provided between the screw portion and the head portion and tightens a connection conductor are loosely fitted.
A terminal screw 10 having, a terminal plate 20 to which a connecting conductor is connected by screwing a screw portion, and a terminal screw between a position where the terminal screw is screwed to the terminal plate and a position where the terminal screw is removed from the terminal plate. In a terminal device provided with a terminal cover 30 that is movably held, and a base 50 that holds the terminal cover detachably while mounting the terminal plate, a state in which the screw portion is removed from the terminal plate on the terminal cover. Then press the metal in the direction of separating from the terminal board,
A twisted coil spring 40 was attached which was capable of pressing the display portion 14b of the dowel when the screw portion was fitted to the terminal plate.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a terminal device used for a circuit breaker for wiring, an electromagnetic contactor or the like.

[0002]

[Prior art]

 As this type of terminal device, there is one shown in FIG. This is a terminal screw 10 having a screw portion 11, a head portion 12, a neck portion 13 which is provided between the screw portion 11 and the head portion 12 and has a fitting 13 for tightening a connection conductor 70 loosely fitted thereto, and a screw portion. A terminal plate 20 having a screw hole 21 into which 11 is screwed and to which the connecting conductor 70 is connected, and a terminal screw between a position where the terminal screw 10 is screwed onto the terminal plate 20 and a position where the terminal screw 20 is removed from the terminal plate 20. A terminal cover 30 that holds the terminal 10 movably, and a base 50 that holds the terminal plate 20 and detachably holds the terminal cover 30 are provided.

A coil spring 80 for pulling up the terminal screw 10 in a direction of separating from the terminal plate 20 is attached to the terminal cover 30 in order to connect the connection conductor 70. The coil spring 80 has a large-diameter ring shape on one side that is larger than the driver insertion hole 33, a smaller-diameter ring shape on the other side than the head 12 of the terminal screw 10, and one side that is above the terminal cover 30. By mounting the other side between the head 12 of the terminal screw 10 and the metal plate 14, the spring force acts in the direction of pulling up the terminal screw 10.

According to this terminal device, when the head 12 is rotated by the driver 90, the screw portion 11 is disengaged from the screw hole 21 of the terminal plate 20, and the screw portion 11 of the terminal screw 10 is floated by the coil spring 80. The connection conductor 70 can be inserted between the screw portion 11 and the terminal plate 20 while being held by the terminal cover 30 with.

[0005]

[Problems to be solved by the device]

 According to the terminal device described above, the coil spring for pulling up the terminal screw in the direction of pulling it away from the terminal plate is attached to the terminal cover, so the terminal screw is screwed onto the terminal plate and the terminal screw is removed from the terminal plate. The spring force in the separating direction is maximized. For this reason, the spring force of the coil spring is easy to loosen, and when the screw part is removed from the terminal plate, the screw part of the terminal screw may not be held by the terminal cover in a state of floating from the terminal plate. In this case, there is a problem that the connecting work of the connecting conductor is troublesome.

The present invention has been made in view of the above circumstances, and an object thereof is to easily hold the screw part of the terminal screw in the terminal cover in a state where the screw part of the terminal screw floats from the terminal plate, thereby connecting the connection conductor. It is to provide a terminal device that facilitates work.

[0007]

[Means for Solving the Problems]

 In order to solve such a problem, the terminal device according to claim 1 has a screw portion, a head portion, and a neck portion, which is provided between the screw portion and the head portion and in which a metal for fastening the connection conductor is loosely fitted. Terminal screw, the terminal plate to which the connecting conductor is connected, having a screw hole into which the screw part is screwed, and the terminal screw between the position where the terminal screw is screwed on the terminal plate and the position where it is removed from the terminal plate. In a terminal device provided with a terminal cover that is movably held and a base that holds the terminal cover detachably while attaching the terminal plate, contact the terminal cover with the screw part removed from the terminal plate. The structure is equipped with a torsion coil spring that presses the gold in a direction away from the terminal plate and can press the side surface of the metal when the screw part is fitted to the terminal plate.

According to a second aspect of the present invention, in the terminal cover according to the first aspect, the terminal cover is provided with an insulating portion in a direction in which the connection conductor is inserted, and the torsion coil spring is mounted in the insulating portion. .

A terminal device according to a third aspect is a display capable of displaying a state in which the connection conductor is connected to the terminal plate or a state in which the connection conductor is not connected to the terminal plate, on the terminal screw of the first or second aspect. It is configured to have a section.

[0010]

According to the configuration of claim 1, when the screw portion of the terminal screw is fitted to the terminal plate, the side surface of the metal plate is pressed, so that the spring force in the direction of pulling the terminal screw away from the terminal plate. Is not the maximum.

According to the configuration of claim 2, in addition to the operation of claim 1, the terminal plate to which the connecting conductor is connected can be insulated and the coil spring can be compactly stored.

According to the configuration of claim 3, in addition to the effect of claim 1 or claim 2, it is possible to display a state in which the terminal screw is closed and a state in which the terminal screw is loosened.

[0013]

【Example】

 An embodiment of the present invention will be described below with reference to FIGS. The members having the same basic functions as those of the conventional example are designated by the same reference numerals.

The terminal screw 10 includes a screw portion 11 having a male screw, a head portion 12 having a driver groove, and a screw portion 11 and a head portion 12 which are connected to each other and tighten a connection conductor (not shown). It has a neck 13 in which gold 14 is loosely fitted. The dowel 14 is formed in a substantially L shape in a side view, and the dowel body 14a loosely fitted to the neck 13 and a state in which the connection conductor is connected to the terminal plate described later or the connection conductor is connected to the terminal plate. And a display piece (display section) 14b capable of displaying a state not to perform. The display piece 14b shows a state where the connecting conductor is connected to the terminal plate by being hidden in the terminal cover described later, and a state where the connecting conductor is not connected to the terminal plate by protruding from the display hole of the terminal cover described later. Is displayed. The terminal screw 10 is movably held by the terminal cover.

The terminal plate 20 is made of a conductive metal such as a copper plate, and the endmost one is formed in a substantially U shape in a side view, and the other ones are formed in a substantially L shape in a side view ( (See FIG. 7). The L-shaped terminal plate 20 is provided with fixed contacts (not shown) that come into contact with and separate from the movable contacts of the base. The terminal board 20 has a screw hole 21 (see FIG. 7) into which the screw portion 11 is screwed, and is attached to a base described later.

The terminal cover 30 holds a plurality of terminal screws 10, and is formed of an insulating material such as plastic into a substantially L shape in a side view. As shown in FIG. 3, the terminal cover 30 allows the terminal screw 10 to be freely moved between a position (a) where the terminal screw 10 is screwed onto the terminal plate 20 and a position (b) where the terminal screw 10 is removed from the terminal plate 20. It has a holding portion 31 for holding and preventing the terminal screw 10 from coming off, and an insulating portion 32 connected in a direction in which the connection conductor is inserted from the holding portion 31. As shown in FIG. 2, the holding portion 31 has a driver hole 33 for rotating the terminal screw 10 by a driver and a display hole 34 for protruding the display piece 14b. Further, locking projections 35 for locking to a base, which will be described later, are provided near the display holes 34 on both sides in the longitudinal direction and one side in the lateral direction of the terminal cover 30. The insulating portion 32 is provided with an outer wall 36 disposed outside, two inner walls 37, 37 facing the outer wall 36 with a space from which the torsion coil spring described later is mounted, and the terminal screw 10. And an isolation wall 38 that is connected to the outer wall 36 so as to isolate the terminal cover 30. A locking hole 31a for locking one end of the torsion coil spring is provided near the outer wall 36 of the insulating portion 31, and the other side of the torsion coil spring is provided between the isolation wall 38 and the one inner wall 37. A locking groove 39 for locking the ends is provided, and a torsion coil spring is mounted between the outer wall 36 and the inner wall 37.

The torsion coil spring 40 is mounted between the outer wall 36 and the inner walls 37, 37 with one end locked in the locking hole 31a and the other end abutted against the metal plate 14, When the screw part 11 is removed from the terminal plate 20, as shown in FIG. 3 (a), when the metal plate 14 is pressed in the direction of separating from the terminal plate 20 and the screw part 11 is fitted to the terminal plate 20, As shown in FIG. 3 (b), the side surface (display piece 14 b) of the dowel 14 is pressed. At this time, the pressing force of the torsion coil spring 40 works the display piece 14b inward. The torsion coil spring 40 is prevented from coming off by mounting the terminal cover 30 on a base described later.

The base 50 is made of an insulating material such as plastic, and mounts the terminal board 20 and detachably holds the terminal cover 30. In this embodiment, as shown in FIG. It corresponds to the cover of the electromagnetic contactor. The base 50 is provided with a locking recess 51 for locking the terminal cover 30, and the terminal cover 30 is locked by fitting the locking protrusion 35 of the terminal cover 30.

To mount the torsion coil spring 40 and the terminal screw 10 on the terminal cover 30, first, as shown in FIG. 4, the terminal cover 30 and the torsion coil spring 40 are disassembled (a ), The torsion coil spring 40 is fitted into the insulating portion 31 and rotated (b) to mount the torsion coil spring 40 (c). Next, as shown in FIG. 5, from the state (a) in which the terminal cover 30 and the terminal screw 10 are disassembled, the display piece 14b of the terminal screw 10 is twisted and brought into contact with one end of the coil spring 40 (b). After that, the display piece 14b is inserted into the display hole 34, and the terminal screw 10 is attached to the terminal cover 30 (c).

Further, in order to mount the terminal cover 30 on which the torsion coil spring 40 and the terminal screw 10 are mounted on the base 50, as shown in FIG. 6, the terminal cover 30 and the base 50 are disassembled. After fitting the locking projections 35 in the lateral direction of the terminal cover 30 into the locking recesses 51 from (a) (b), lock the locking projections 35 at both ends in the longitudinal direction of the terminal cover 30 into the locking recesses. Lock by fitting (c) to 51.

In addition, according to the present embodiment, the metal plate is formed in an L shape, and the display hole of the terminal cover is formed in the holding portion. For example, it can be displayed from a position where it is easy to see.

FIG. 7 is an exploded perspective view showing an electromagnetic contactor incorporating this embodiment, in which a body 60 and a cover 50 (base) form a housing. The body 60 is provided with an electromagnet device 61 having an armature that moves by energizing the coil. A movable frame 52 having a movable contact (not shown) is secured to the cover 50 by a retaining member 53 so that the movable frame 52 can advance and retreat in the horizontal direction. Terminal devices are arranged on both sides of the center where the movable frame 52 is locked. A return spring 54 is used to return the movable frame 52 of the electromagnetic contactor.

[0023]

According to the terminal device of the first aspect, since the side surface of the metal plate is pressed in a state where the screw portion of the terminal screw is fitted to the terminal plate, the direction in which the terminal screw is pulled away from the terminal plate. Does not maximize the spring force of the terminal screw, and when the screw part of the terminal screw is removed from the terminal plate, the screw part of the terminal screw is easily held in the terminal cover with the screw part floating from the terminal plate, which facilitates the connection work of the connecting conductor. Will be things.

According to the terminal device of the second aspect, the terminal plate to which the connection conductor is connected can be insulated, and the coil spring can be housed compactly. In addition to the effect of the first aspect, the terminal cover can be made compact. Can be converted.

According to the terminal device of the third aspect, it is possible to display a state in which the terminal screw is closed and a state in which the terminal screw is loosened. In addition to the effect of the first or second aspect, the screw closing can be performed. This has the effect of improving safety such as forgetting.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an embodiment of the present invention.

FIG. 2 is a rear exploded perspective view showing a state where the terminal plate and the base of FIG. 1 are removed.

FIG. 3 is an explanatory view showing a method of floating the terminal screw of FIG. 1 from the terminal plate, (a) shows a state in which the terminal screw is screwed onto the terminal plate, and (b) shows the terminal screw from the terminal plate. It shows the floating state.

FIG. 4 is an explanatory view of mounting a torsion coil spring on the terminal cover of FIG.

FIG. 5 is an explanatory view of attaching a terminal screw to that of FIG.

FIG. 6 is an explanatory view of mounting the one shown in FIG. 2 on a base.

FIG. 7 is an exploded perspective view showing an electromagnetic contactor to which the terminal device of the present invention is applied.

FIG. 8 is a cross-sectional view showing a conventional example.

[Explanation of symbols]

 10 Terminal screw 11 Screw part 12 Head part 13 Neck part 14 Neck part 14 Gold 14b Display piece (display part) 20 Terminal plate 21 Screw hole 30 Terminal cover 31 Insulation part 40 Torsion coil spring 50 Base

Claims (3)

[Scope of utility model registration request] 1. A terminal screw having a screw portion, a head portion, a screw portion, and a neck portion in which a metal fitting is loosely fitted between the screw portion and the head portion for fastening a connecting conductor, and a screw hole into which the screw portion is screwed. Attach the terminal plate to which the connecting conductor is connected, the terminal cover that movably holds the terminal screw between the position where the terminal screw is screwed to the terminal plate and the position where the terminal screw is removed from the terminal plate, and the terminal plate. A terminal device provided with a base that detachably holds the terminal cover together with the terminal cover, in a state where the screw portion is removed from the terminal plate, press the metal plate in a direction away from the terminal plate, A terminal device characterized in that a torsion coil spring capable of pressing the side surface of the metal member when fitted to the terminal plate is mounted. 2. The terminal device according to claim 1, wherein the terminal cover is provided with an insulating portion in a direction in which the connection conductor is inserted, and the torsion coil spring is mounted in the insulating portion. 3. The terminal screw is provided with a display portion capable of displaying a state in which the connection conductor is connected to the terminal plate or a state in which the connection conductor is not connected to the terminal plate. The terminal device described.